temp

.github/workflows/deploy.yml

@@ -24,4 +24,4 @@ jobs:
         node-version: ${{ matrix.node-version }}
     - run: npm install
     - run: npm run test
-    - run: npm run check-formatting
+    - run: npm run prettier

.gitignore

@@ -30,5 +30,4 @@ release-notes.md
 
 .rpt2_cache
 
-# useful in some cases
 /temp

CHANGELOG.md

@@ -1,612 +0,0 @@
-# Changelog
-
-This document contains an overview of all changes between Owl 1.x and
-Owl 2.x, with some pointers on how to update the code.
-
-Note that some of these changes can be magically implemented (for example, by
-patching the `setup` method of `Component` to auto register all the lifecycle
-methods as hooks). This will be done for the transition period, but will be
-removed after.
-
-## Changes
-
-**Components**
-
-- components can now have empty content or multiple root nodes (htmlelement or text) ([details](#31-components-can-now-have-arbitrary-content))
-- new `useEffect` hook
-- new `onDestroyed`, `onWillRender` and `onRendered` hooks
-- breaking: lifecycle methods are removed ([details](#1-component-lifecycle-methods-are-removed))
-- breaking: can no longer be mounted on detached DOM ([details](#2-components-can-no-longer-be-mounted-in-a-detached-dom-element))
-- breaking: standalone `mount` method API is simpler ([details](#4-mount-method-api-is-simpler))
-- breaking: components can no longer be instantiated and mounted by hand ([details](#5-components-can-no-longer-be-instantiated-and-mounted-by-hand))
-- breaking: components can no longer be unmounted/remounted ([details](#6-components-can-no-longer-be-unmountedremounted))
-- breaking: template name is no longer inferred from the class name ([details](#7-template-name-is-no-longer-inferred-from-the-class-name))
-- breaking: components no longer have a `shouldUpdate` method ([details](#8-components-no-longer-have-a-shouldupdate-method))
-- breaking: component.el may be a text node, and is no longer `null` ([details](#9-componentel-may-be-a-text-node-and-is-no-longer-null))
-- breaking: style/class on components are now regular props ([details](#10-styleclass-on-components-are-now-regular-props))
-- breaking: components can no longer be mounted with position=self ([details](#11-components-can-no-longer-be-mounted-with-positionself))
-- breaking: `t-on` does not work on components any more ([details](#12-t-on-does-not-work-on-components-any-more))
-- breaking: `t-component` no longer accepts strings ([details](#17-t-component-no-longer-accepts-strings))
-
-**Portal**
-
-- portals can now have arbitrary content (no longer restricted to one single child)
-- breaking: does no longer transfer dom events ([details](#13-portal-does-no-longer-transfer-dom-events))
-- breaking: does render as an empty text node instead of `<portal/>` ([details](#14-portal-does-render-as-an-empty-text-node-instead-of-portal))
-
-**Slots**
-
-- breaking: `t-set` does not define a slot any more ([details](#3-t-set-will-no-longer-work-to-define-a-slot))
-
-**Miscellaneous**
-
-- improved performance
-- much simpler code 
-- finer grained reactivity: owl 2 tracks change per key/component
-- finer grained reactivity: sub components can reobserve state
-- new App class to encapsulate a root Owl component (with the config for that application)
-- new `Memo` component
-- breaking: `Context` is removed ([details](#15-context-is-removed))
-- breaking: `env` is now totally empty ([details](#16-env-is-now-totally-empty))
-- breaking: most exports are exported at top level ([details](#18-most-exports-are-exported-at-top-level))
-- breaking: properties are no longer set as attributes ([details](#19-properties-are-no-longer-set-as-attributes))
-- breaking: `t-foreach` should always have a corresponding `t-key` ([details](#20-t-foreach-should-always-have-a-corresponding-t-key))
-- breaking: `EventBus` api changed: it is now an `EventTarget` ([details](#21-eventbus-api-changed-it-is-now-an-eventtarget))
-- breaking: `Store` is removed ([details](#22-store-is-removed))
-- breaking: `Router` is removed ([details](#23-router-is-removed))
-- breaking: transition system is removed ([details](#24-transition-system-is-removed))
-- breaking: no more global components or templates ([details](#25-no-more-global-components-or-templates))
-- breaking: `AsyncRoot` utility component is removed ([details](#26-asyncroot-utility-component-is-removed))
-- breaking: `useSubEnv` only applies to child components ([details](#27-usesubenv-only-applies-to-child-components))
-- breaking: `env` is now frozen ([details](#28-env-is-now-frozen))
-- breaking: `t-ref` does not work on components ([details](#29-t-ref-does-not-work-on-component))
-- breaking: `t-on` does not accept expressions, only functions ([details](#30-t-on-does-not-accept-expressions-only-functions))
-- breaking: `renderToString` function on qweb has been removed ([details](#32-rendertostring-on-qweb-has-been-removed))
-
-
-## Details/Rationale/Migration
-
-All changes are listed in no particular order.
-
-### 1. component lifecycle methods are removed
-
-There was two ways to define hooks: the component methods (`willStart`, `mounted`, ...) and the hooks (`onWillStart`, `onMounted`, ...). In Owl 2, the component methods have been removed.
-
-Rationale: it makes the implementation simpler and slightly faster. Hooks are more composable
-than component methods. It enforces a single entry point to check all the useful lifecycle
-calls (instead of it being scattered in the component definition). It feels more "modern".
-
-Migration: lifecycle methods should be defined in the `setup`:
-
-```js
-class MyComponent extends Component {
-  mounted() {
-    // do something
-  }
-}
-```
-should become:
-```js
-class MyComponent extends Component {
-  setup() {
-    onMounted(() => {
-      // do something
-    });
-  }
-}
-```
-
-### 2. components can no longer be mounted in a detached dom element
-
-Nor document fragment.
-
-Rationale: it is actually very difficult to do it: this implies that a component
-can be mounted more than once, that we need to check every time different status,
-that some elements is in the dom, and was a cause for bugs. Also, we don't use it
-in practice. Removing this means that we have a much simpler mental model of what
-happens.
-
-Migration: well, not really easy. The code needs to be refactored in a different way.
-
-
-### 3. **`t-set` will no longer work to define a slot**
-
-The `t-set` directive cannot define a slot anymore. Only the `t-set-slot` directive
-can do it.
-
-Rationale: it was left for compatibility reason, but was deprecated anyway.
-
-Migration: `t-set` should be changed to `t-set-slot` (when defining a slot)
-
-Example:
-
-```xml
-<SideBar><t t-set="content">content</t></SideBar>
-```
-should become:
-```xml
-<SideBar><t t-set-slot="content">content</t></SideBar>
-```
-
-### 4. `mount` method API is simpler
-
-Before, the `mount` method was used like this:
-
-```js
-await mount(Root, { target: document.body });
-```
-
-It is now simpler and takes the root component and a target argument:
-
-```js
-await mount(Root, document.body);
-```
-
-Rationale: the `mount` method is only useful anyway for small toy examples,
-because real applications will need to configure the templates, the translations,
-and other stuff. All complex usecases need to go through the new `App` class,
-that encapsulates the root of an owl application.
-
-### 5. components can no longer be instantiated and mounted by hand
-
-In Owl 1, it was possible to instantiate a component by hand:
-
-```js
-const root = new Root();
-await root.mount(document.body);
-```
-
-Now, it is no longer possible. All component instantiations should be done by
-the owl framework itself.
-
-Rationale: the `mount` method does not make sense for all non root components.
-Also, the fact that it was possible for a component to be sometimes root,
-sometimes a child made for a weird constructor signature. This changes makes it
-simpler.
-
-Migration: all code doing that should use either the `mount` method (if the use
-case is simple enough, or the `App` class):
-
-```js
-const app = new App(Root);
-app.configure({ templates: ..., ...});
-await app.mount(document.body);
-```
-
-### 6. components can no longer be unmounted/remounted
-
-Rationale: this is a very difficult feature to implement (it adds a lot of possible
-state transitions), compared to its benefit.
-
-Migration: all code using it should find a way to export and reimport the state
-
-### 7. template name is no longer inferred from the class name
-
-Before, it was possible to define a component without specifying its template:
-
-```js
-class Blabla extends Component {
-    // no static template here!
-}
-```
-with the `Blabla` template. It also worked with subclasses. But then, this means
-that the code had to look up all the super classes names to find the correct
-template.
-
-Rationale: in practice, it is not really useful, since all templates are usually
-namespaced: `web.SomeComponent` anyway. All the trouble to do that was just not
-worth it.
-
-Migration: simply explicitely defines the template key everytime:
-
-```js
-class Blabla extends Component {}
-Blabla.template = "Blabla";
-```
-
-### 8. components no longer have a `shouldUpdate` method
-
-Rationale: `shouldUpdate` is a dangerous method to use, that may cause a lot of
-issues. Vue does not have such a mechanism (see https://github.com/vuejs/vue/issues/4255),
-because the reactivity system in Vue is smart enough to only rerender the minimal
-subset of components that is subscribed to a piece of state. Now, Owl 2 features
-a much more powerful reactivity system.
-
-Migration code: remove the `shouldUpdate` methods. Then, maybe the following
-ideas may help:
-
-- try to organize the state/architecture to minimize the number of state updates
-- take advantage of the finer reactivity system. For example, if we have a list
-  of items, with a component for each item, we can write this:
-
-  ```js
-  class Item extends Component {
-      setup() {
-          this.item = useState(this.props.item); // and only use this, not props.item
-      }
-  }
-  ```
-  Doing so will make it that each `Item` component will register itself as an
-  observer of its own item, and will be the only component being rerendered when
-  its item object is updated.
-- use the `Memo` component to wrap some piece of template. `Memo` memoize its
-  content, and only update itself if its props are different (shallow comparison):
-  
-  ```xml
-    <Memo a="state.a" b="state.b"> 
-        <t t-esc="state.a"/>
-        <t t-esc="state.b"/>
-        <t t-esc="state.c"/>
-    </Memo>
-  ```
-
-### 9. component.el may be a text node, and is no longer `null`
-
-This comes from the fact that Owl 2 supports fragments (arbitrary content). When
-it is not defined, it was `null` in Owl 1 and is `undefined` in owl 2.
-
-### 10. style/class on components are now regular props
-
-Before, it was possible to do this in a template:
-
-```xml
-<Child style="..." class="..."/>
-```
-(or with `t-att-style` and `t-att-class`). This does no longer work, as they are
-now considered normal props.
-
-Rationale: with the move to fragments, the semantics of where the style/class
-attribute should be set is unclear. Also, it is actually very hard to implement
-properly, in particular with higher order components. And another issue is that
-it (slightly) breaks the encapsulation of behaviour from the `Child` component
-perspective.
-
-Migration: each component that wishes to be customized should explicitely add
-the `class` and `style` attributes in its template. Also, the parent component
-should be aware that since we are talking about props, it should be a javascript expression:
-
-In parent:
-
-```xml
-<Child class="'o_my_god'"/>
-```
-and in child:
-
-```xml
-    <div t-att-class="props.class">
-        ...
-    </div>
-```
-
-### 11. components can no longer be mounted with position=self
-
-Rationale: this is due to the implementation of owl 2 virtual dom. The hack
-necessary to support position=self does not work. This position also is not
-compatible with the fact that a component can have a root `<div>` then later,
-change it to something else, or even a text node.
-
-Migration: no real way to do the same. Owl application needs to be appended or
-prepended in something, maybe a `div`.
-
-### 12. `t-on` does not work on components any more
-
-In owl 1, it was possible to bind an event listener on a component tag in a
-template:
-
-```xml
-<SomeComponent t-on-some-event="doSomething"/>
-```
-
-This does not work any more.
-
-Rationale: with the support of fragments, there is no longer a canonical html
-element that we can refer. So, this makes it difficult to implement correctly
-and efficiently. Also, we noticed in practice that the event system was an issue
-in some cases, when components need to communicate before they are mounted. In
-those cases, the better solution is to directly use a callback.  Also, another
-conceptual issue with this is that it kind of breaks the component encapsulation.
-The child component kind of leak its own implementation to the outside world.
-
-Migration: a quick fix that may work in some cases is to simply bind the event
-handler on a parent htmlelement. A better way to do it, if possible, is to change
-the component API to accept explicitely a callback as props. 
-
-```xml
-<SomeComponent onSomeEvent="doSomething"/>
-```
-
-### 13. Portal does no longer transfer DOM events
-
-In Owl 1, a Portal component would listen to events emitted on its portalled
-child, and redispatch them on itself. It no longer works.
-
-Rationale: Portal now supports an arbitrary content (so, more than one child,
-and potentially no html element), so it is already unclear what it should listen
-to. Also, redispatching events was an hack. And this changes allows the portal
-to render itself as a text node, which is nice. This is also in line with the
-fact that modern Owl moves toward using callback instead of `t-on` for communication.
-
-Migration: use callback if possible to communicate. Otherwise, use a sub env.
-
-### 14. Portal does render as an empty text node instead of `<portal/>`
-
-That is pretty nice. No real migration needed.
-
-### 15. Context is removed
-
-Context was an abstraction in Owl that was used to define some reactive state
-and to let some components subscribe to it, then only them would be rerendered
-if the context was updated. This has been removed.
-
-Rationale: first, the Context api and code was kind of awkward, which is a sign
-that the abstraction is not well thought. But the good news is that it is actually
-completely replaced by the new reactivity system, which is even more powerful,
-since it can tracks changes key by key.
-
-Migration: replace all uses of Context with the new reactivity system.
-
-```js
-// somewhere, maybe in a service, or in the global env
-const context = observe({some: "state"})
-
-// in a component that would previously get a reference to the context:
-
-setup() {
-    this.context = useState(context);
-    // now the component is subscribed to the context and will react to any
-    // change for any key read by the component, and only those changes
-}
-```
-
-### 16. `env` is now totally empty
-
-In Owl 1, the `env` object had to contain a QWeb instance. This was the way
-components would get a reference to their template function. It no longer works
-that way: the `env` object is now totally empty (from the perspective of Owl).
-It is now a user space concept, useful for the application.
-
-Rationale: first, there is no longer a QWeb class. Also, this changes simplifies
-the way components works internally.
-
-Migration: there is no proper way to get an equivalent. The closest is to get
-a reference to the root App using `this.__owl__.app`. If you need to do this,
-let us know. If this is a legitimate usecase, we may add a `useApp` hook.
-
-### 17. `t-component` no longer accepts strings
-
-In owl 1, we could write this:
-
-```xml
-<t t-component="Coucou"/>
-```
-
-This meant that Owl would look for the component class like this: `components["Coucou"]`,
-so, essentially equivalent to `<Coucou/>`. In Owl 2, the `t-component` directive
-is assumed to be an expression evaluating to a component class:
-
-```js
-class Parent extends Component {
-  static template = xml`<t t-component="Child"/>`;
-  Child = Child;
-}
-```
-
-Rationale: it simply seems more consistent with the way directive works. Also,
-the implementation is slightly simpler.
-
-Migration: simply using `constructor.components.Coucou` instead of `Coucou` will
-do the trick.
-
-### 18. most exports are exported at top level
-
-Most exports are flattened: for ex, `onMounted` is in owl, not in `owl.hooks`.
-
-Rationale: this makes it easier to work with, instead of importing stuff from 
-`owl`, then `owl.hooks` and `owl.tags` for example.
-
-Migration: all import code simply need to be slightly adapted.
-
-### 19. Properties are no longer set as attributes
-
-Formerly, html properties `<input type="checkbox" t-att-checked="blah"/>` were
-set as property and as attribute, so, they would be visible in the DOM:
-`<input type="checkbox" checked="blah"/>`. Now, they are treated as property only:
-`<input type="checkbox"/>`.
-
-Rationale: this is actually simple to do, is faster, and makes more sense to me.
-
-### 20. `t-foreach` should always have a corresponding `t-key`
-
-It was possible in Owl 1 to write a `t-foreach` without a `t-key`. In that case,
-the index was used as key.  Since it was clearly a possible bug, Owl 1 had a
-warning in some cases, when it could detect that there was definitely not a `t-key`.
-However, this was imperfect, and in some cases no warning was displayed. In Owl 2,
-the tag with a `t-foreach` has to have a corresponding `t-key`.
-
-Rationale: this makes it easier to avoid bugs.
-
-Migration: simply move the `t-key` to the tag with the `t-foreach`. If this is
-a situation where there is really not a need for a `t-key`, you can still add
-it with the `_index` suffix:
-
-```xml
-<div t-foreach="items" t-as="item" t-key="item_index">
-  ...
-</div>
-```
-
-### 21. `EventBus` api changed: it is now an `EventTarget`
-
-In Owl 1, the `EventBus` class was done manually, with a custom API. In Owl 2,
-it simply extends `EventTarget` (the native Dom class), so its implementation
-is basically only 5 lines long. This means that it has now the usual DOM interface:
-
-```js
-bus.addEventListener('event-name', callback);
-```
-
-Rationale: it makes it easier to have just one interface to remember, it makes
-the code simpler
-
-Migration: most bus methods need to be adapted. So, `bus.on("event-type", owner, (info) => {...})` has to be
-rewritten like this: `bus.addEventListener("event-type", (({detail: info}) => {...}).bind(owner))`.
-
-Do not forget to similarly replace `bus.off(...)` by `bus.removeEventListener(...)`
-
-### 22. `Store` is removed
-
-The Store system had been abandoned in owl 2.
-
-Rationale: first, it was complicated to maintain. Second, it was not really
-used in Odoo. Finally, the new reactivity system seems to be a pretty good basis
-to write a store, and it should not take much work. Also, this can be done in
-user space (so, not necessarily at the framework level). Another point is that
-the store API was invented before the hooks, then was still a little awkward.
-
-Migration:
-- rewrite the code not to use a store
-- probably use the reactivity system instead and build a store class and a few
-  hooks on top of it.
-
-### 23. `Router` is removed
-
-Rationale: Router was not used that much, and it felt like it did not fit in Owl 2.
-Its API needs to be reworked, and we are not confident that it is a good
-experience to use it. Also, it can be done in userspace (it does not need specific
-integration at the framework level)
-
-Migration: reimport all missing piece from the code in Owl 1.
-
-### 24. transition system is removed
-
-Rationale: this was a high ratio cost/value, with a lot of potential for bugs.
-We feel like there should be a way to reimplement in userspace the simple cases.
-
-Maybe something like: add a `t-ref` in the template, and define a hook `useFadeOut`
-that takes the ref, and add a fadeout class at initial render, then in mounted,
-wait for a micro tick and remove it.
-
-Migration: try to reimplement it manually. 
-
-### 25. no more global components or templates
-
-It was possible in Owl 1 to register globally a component or a template. This is
-no longer the case in Owl 2.
-
-Rationale: first, this was a tradeoff: ease of use was gained, but at the cost
-of a higher complexity. Users had to know that there was a magic mechanism. Also,
-it was not used much in practice, and the cost of having to import manually components
-is low.  Finally, this can be mostly done in user space (for example, by subclassing
-`Component`).
-
-Migration: import manually all required global components, or find a way to organize
-the code to do it.
-
-### 26. `AsyncRoot` utility component is removed
-
-Rationale: it was difficult to understand, never used, and not really useful.
-It seems better to control the asynchrony of an application by simply controlling
-how/when the state is updated, and how each component is loading/updating itself.
-
-Migration: remove the `AsyncRoot` component, then possibly, reorganize the code
-to fetch data in a higher order component, and using a `t-if/t-else` to display
-either a fallback when the data is not ready, or the actual component with data
-as props.  If there is no escape, and `AsyncRoot` is needed, please reach out to
-us so we can study this usecase.
-
-### 27. `useSubEnv` only applies to child components
-
-In Owl 1, a call to `useSubEnv` would define a new environment for the children
-AND the component. It now only defines an environment for the children.
-
-Rationale: This was a subtle cause for bugs: some code had to be rrun
-before the call to `useSubEnv`, otherwise it could interfere with the sub environment.
-
-
-### 28. `env` is now frozen
-
-In Owl 2, the `env` object is frozen. It can no longer be modified (structurally)
-arbitrarily. 
-
-Rationale: it seems like the `env` object purpose is to have a global channel of
-communication between components. It is however scary if anyone can add something
-to it.  The usual use case is to add something to the environment for some child
-components. This use case still works with `useSubEnv`.
-
-Migration: use `useSubEnv` instead of writing directly to the env.  Also, note
-that the environment given to the App can initially contain anything.
-
-### 29. `t-ref` does not work on component
-
-Before, `t-ref` could be used to get a reference to a child component. It no
-longer works.
-
-Rationale: the possibility of having a ref to a child component breaks the
-encapsulation provided by Owl components: a child component now has a private
-and a public interface.  Another issue is that it may be unclear when the ref
-should be set: is the component active on setup, or on mounted? Also, it is
-kind of awkward to implement.
-
-Migration: the `env` and `props` should provide a communication channel wide enough:
-the sub component can expose its public API by calling a callback at the proper
-timing, or by triggering an event.
-
-### 30. `t-on` does not accept expressions, only functions
-
-In Owl 1, it was possible to define simple expressions inline, in a template:
-
-```xml
-<button t-on-click="state.value = state.value + 1">blabla</button>
-<button t-on-click="someFunction(someVar)">blabla</button>
-```
-
-This does not work anymore. Now, the `t-on` directive assumes that what it get is
-a function.
-
-Rationale: the fact that owl 1 had to support expressions meant that it was not
-possible to properly inject the event in general. With this restriction, Owl 2
-can support more general use cases. Also, the examples above can simply be
-wrapped in a lambda function. 
-
-Migration: use lambda functions. For example, the two examples above can be
-adapted like this:
-
-```xml
-<button t-on-click="() => state.value = state.value + 1">blabla</button>
-<button t-on-click="() => this.someFunction(someVar)">blabla</button>
-```
-
-### 31. components can now have arbitrary content
-
-Before Owl 2, components had to limit themselves to one single htmlelement as
-root. Now, the content is arbitrary: it can be empty, or multiple html elements.
-So, the following template works for components:
-
-```xml
-  <div>1</div>
-  <div>2</div>
-  hello
-```
-
-### 32. `renderToString` on QWeb has been removed
-
-Rationale: the `renderToString` function was a qweb method, which made sense because
-the qweb instance knew all templates. But now, the closest analogy is the `App`
-class, but it is not as convenient, since the `app` instance is no longer visible
-to components (while before, `qweb` was in the environment).
-
-Also, this can easily be done in userspace, by mounting a component in a div.  For example:
-
-```js
-export async function renderToString(template, context) {
-  class C extends Component {
-    static template = template;
-  }
-  const div = document.createElement('div');
-  document.body.appendChild(div);
-  const component = await mount(C, div);
-  const result = div.innerHTML;
-  app.destroy();
-  div.remove();
-  return result;
-}

README.md

@@ -1,4 +1,4 @@
-<h1 align="center">🦉 <a href="https://odoo.github.io/owl/">Owl Framework</a> 🦉</h1>
+<h1 align="center">🦉 <a href="https://odoo.github.io/owl/">OWL Framework</a> 🦉</h1>
 
  [![License: LGPL v3](https://img.shields.io/badge/License-LGPL%20v3-blue.svg)](https://www.gnu.org/licenses/lgpl-3.0)
 [![npm version](https://badge.fury.io/js/@odoo%2Fowl.svg)](https://badge.fury.io/js/@odoo%2Fowl)
@@ -6,39 +6,51 @@
 
 _Class based components with hooks, reactive state and concurrent mode_
 
-**Try it online!** you can experiment with the Owl framework in an online [playground](https://odoo.github.io/owl/playground).
-
 ## Project Overview
 
-The Odoo Web Library (Owl) is a smallish (~<20kb gzipped) UI framework built by
-[Odoo](https://www.odoo.com/) for its products. Owl is a modern
+The Odoo Web Library (OWL) is a smallish (~<20kb gzipped) UI framework intended to
+be the basis for the [Odoo](https://www.odoo.com/) Web Client. Owl is a modern
 framework, written in Typescript, taking the best ideas from React and Vue in a
 simple and consistent way. Owl's main features are:
 
 - a declarative component system,
 - a reactivity system based on hooks,
 - concurrent mode by default,
+- a store and a frontend router
 
-Owl components are defined with ES6 classes and xml templates, uses an
+Owl components are defined with ES6 classes, they use QWeb templates, an
 underlying virtual DOM, integrates beautifully with hooks, and the rendering is
 asynchronous.
 
-Quick links:
+**Try it online!** An online playground is available at
+[https://odoo.github.io/owl/playground](https://odoo.github.io/owl/playground)
+to let you experiment with the Owl framework. There are some code examples to
+showcase some interesting features.
 
-- [documentation](#documentation),
-- [changelog](CHANGELOG.md) (from Owl 1.x to 2.x),
-- [playground](https://odoo.github.io/owl/playground)
+Owl is currently stable.  Possible future changes are explained in the
+[roadmap](roadmap.md).
+
+## Why Owl?
+
+Why did Odoo decide to make Yet Another Framework?  This is really a question
+that deserves [a long answer](doc/miscellaneous/why_owl.md). But in short, we believe that
+while the current state of the art frameworks are excellent, they are not
+optimized for our use case, and there is still room for something else.
+
+If you are interested in a comparison with React or Vue, you will
+find some more additional information [here](doc/miscellaneous/comparison.md).
 
 ## Example
 
 Here is a short example to illustrate interactive components:
 
 ```javascript
-const { Component, useState, mount, xml } = owl;
+const { Component, useState } = owl;
+const { xml } = owl.tags;
 
 class Counter extends Component {
   static template = xml`
-    <button t-on-click="() => state.value++">
+    <button t-on-click="state.value++">
       Click Me! [<t t-esc="state.value"/>]
     </button>`;
 
@@ -55,7 +67,8 @@ class App extends Component {
   static components = { Counter };
 }
 
-mount(App, document.body);
+const app = new App();
+app.mount(document.body);
 ```
 
 Note that the counter component is made reactive with the [`useState` hook](doc/reference/hooks.md#usestate).
@@ -65,55 +78,41 @@ But this is not mandatory, many applications will load templates separately.
 More interesting examples can be found on the
 [playground](https://odoo.github.io/owl/playground) application.
 
+## Design Principles
+
+OWL is designed to be used in highly dynamic applications where changing
+requirements are common and code needs to be maintained by large teams.
+
+- **XML based**: templates are based on the XML format, which allows interesting
+  applications. For example, they could be stored in a database and modified
+  dynamically with `xpaths`.
+- **templates compilation in the browser**: this may not be a good fit for all
+  applications, but if you need to generate dynamically user interfaces in the
+  browser, this is very powerful. For example, a generic form view component
+  could generate a specific form user interface for each various models, from a XML view.
+- **no toolchain required**: this is extremely useful for some applications, if,
+  for various reasons (security/deployment/dynamic modules/specific assets tools),
+  it is not ok to use standard web tools based on `npm`.
+
+Owl is not designed to be fast nor small (even though it is quite good on those
+two topics). It is a no nonsense framework to build applications. There is only
+one way to define components (with classes). There is no black magic. It just
+works.
+
+
 ## Documentation
 
-### Learning Owl
+A complete documentation for Owl can be found here:
 
-Are you new to Owl? This is the place to start!
+- [Main documentation page](doc/readme.md).
 
-- [Tutorial: create a TodoList application](doc/learning/tutorial_todoapp.md)
+Some of the most important pages are:
+
+- [Tutorial: TodoList application](doc/learning/tutorial_todoapp.md)
 - [How to start an Owl project](doc/learning/quick_start.md)
-- [How to test Components](doc/learning/how_to_test.md)
-- [How to write Single File Components](doc/learning/how_to_write_sfc.md)
-
-### Reference
-
-You will find here a complete reference of every feature, class or object
-provided by Owl.
-
-- [Animations](doc/reference/animations.md)
-- [Browser](doc/reference/browser.md)
+- [QWeb templating language](doc/reference/qweb_templating_language.md)
 - [Component](doc/reference/component.md)
-- [Content](doc/reference/content.md)
-- [Concurrency Model](doc/reference/concurrency_model.md)
-- [Configuration](doc/reference/config.md)
-- [Context](doc/reference/context.md)
-- [Environment](doc/reference/environment.md)
-- [Event Bus](doc/reference/event_bus.md)
-- [Event Handling](doc/reference/event_handling.md)
-- [Error Handling](doc/reference/error_handling.md)
 - [Hooks](doc/reference/hooks.md)
-- [Mounting a component](doc/reference/mounting.md)
-- [Miscellaneous Components](doc/reference/misc.md)
-- [Observer](doc/reference/observer.md)
-- [Props](doc/reference/props.md)
-- [Props Validation](doc/reference/props_validation.md)
-- [QWeb Templating Language](doc/reference/qweb_templating_language.md)
-- [QWeb Engine](doc/reference/qweb_engine.md)
-- [Slots](doc/reference/slots.md)
-- [Tags](doc/reference/tags.md)
-- [Utils](doc/reference/utils.md)
-
-### Other Topics
-
-This section provides miscellaneous document that explains some topics
-which cannot be considered either a tutorial, or reference documentation.
-
-- [Owl architecture: the Virtual DOM](doc/miscellaneous/vdom.md)
-- [Owl architecture: the rendering pipeline](doc/miscellaneous/rendering.md)
-- [Comparison with React/Vue](doc/miscellaneous/comparison.md)
-- [Why did Odoo built Owl?](doc/miscellaneous/why_owl.md)
-
 
 
 ## Installing Owl
@@ -126,5 +125,8 @@ npm install @odoo/owl
 
 If you want to use a simple `<script>` tag, the last release can be downloaded here:
 
-- [owl-1.4.7](https://github.com/odoo/owl/releases/tag/v1.4.7)
+- [owl-1.0.13](https://github.com/odoo/owl/releases/tag/v1.0.13)
 
+## License
+
+OWL is [LGPL licensed](./LICENSE).

doc/learning/how_to_debug.md

@@ -0,0 +1,43 @@
+# 🦉 How to debug Owl applications 🦉
+
+Non trivial applications become quickly more difficult to understand. It is then
+useful to have a solid understanding of what is going on. To help with that,
+logging useful information is extremely valuable. There is a [javascript file](../../tools/debug.js) which can be evaluated in an application.
+
+Once it is executed, it will log a lot of information on each component main hooks. The following code is a minified version to make it easier to copy/paste:
+
+```
+function debugOwl(t,e){let n,o="[OWL_DEBUG]";function r(t){let e;try{e=JSON.stringify(t||{})}catch(t){e="<JSON error>"}return e.length>200&&(e=e.slice(0,200)+"..."),e}if(Object.defineProperty(t.Component,"current",{get:()=>n,set(s){n=s;const i=s.constructor.name;if(e.componentBlackList&&e.componentBlackList.test(i))return;if(e.componentWhiteList&&!e.componentWhiteList.test(i))return;let l;Object.defineProperty(n,"__owl__",{get:()=>l,set(n){!function(n,s,i){let l=`${s}<id=${i}>`,c=t=>console.log(`${o} ${l} ${t}`),u=t=>(!e.methodBlackList||!e.methodBlackList.includes(t))&&!(e.methodWhiteList&&!e.methodWhiteList.includes(t));u("constructor")&&c(`constructor, props=${r(n.props)}`);u("willStart")&&t.hooks.onWillStart(()=>{c("willStart")});u("mounted")&&t.hooks.onMounted(()=>{c("mounted")});u("willUpdateProps")&&t.hooks.onWillUpdateProps(t=>{c(`willUpdateProps, nextprops=${r(t)}`)});u("willPatch")&&t.hooks.onWillPatch(()=>{c("willPatch")});u("patched")&&t.hooks.onPatched(()=>{c("patched")});u("willUnmount")&&t.hooks.onWillUnmount(()=>{c("willUnmount")});const d=n.__render.bind(n);n.__render=function(...t){c("rendering template"),d(...t)};const h=n.render.bind(n);n.render=function(...t){const e=n.__owl__;let o="render";return e.isMounted||e.currentFiber||(o+=" (warning: component is not mounted, this render has no effect)"),c(o),h(...t)};const p=n.mount.bind(n);n.mount=function(...t){return c("mount"),p(...t)}}(s,i,(l=n).id)}})}}),e.logScheduler){let e=t.Component.scheduler.start,n=t.Component.scheduler.stop;t.Component.scheduler.start=function(){this.isRunning||console.log(`${o} scheduler: start running tasks queue`),e.call(this)},t.Component.scheduler.stop=function(){this.isRunning&&console.log(`${o} scheduler: stop running tasks queue`),n.call(this)}}if(e.logStore){let e=t.Store.prototype.dispatch;t.Store.prototype.dispatch=function(t,...n){return console.log(`${o} store: action '${t}' dispatched. Payload: '${r(n)}'`),e.call(this,t,...n)}}}
+debugOwl(owl, {
+  // componentBlackList: /App/,  // regexp
+  // componentWhiteList: /SomeComponent/, // regexp
+  // methodBlackList: ["mounted"], // list of method names
+  // methodWhiteList: ["willStart"], // list of method names
+  logScheduler: false,  // display/mute scheduler logs
+  logStore: true,     // display/mute store logs
+});
+```
+
+The above code, once pasted somewhere in the main javascript file of an owl
+application, will log information looking like this:
+
+```
+[OWL_DEBUG] TodoApp<id=1> constructor, props={}
+[OWL_DEBUG] TodoApp<id=1> mount
+[OWL_DEBUG] TodoApp<id=1> willStart
+[OWL_DEBUG] TodoApp<id=1> rendering template
+[OWL_DEBUG] TodoItem<id=2> constructor, props={"id":2,"completed":false,"title":"hey"}
+[OWL_DEBUG] TodoItem<id=2> willStart
+[OWL_DEBUG] TodoItem<id=3> constructor, props={"id":4,"completed":false,"title":"aaa"}
+[OWL_DEBUG] TodoItem<id=3> willStart
+[OWL_DEBUG] TodoItem<id=2> rendering template
+[OWL_DEBUG] TodoItem<id=3> rendering template
+[OWL_DEBUG] TodoItem<id=3> mounted
+[OWL_DEBUG] TodoItem<id=2> mounted
+[OWL_DEBUG] TodoApp<id=1> mounted
+```
+
+Each component has an internal `id`, which is very useful when debugging.
+
+Note that it is certainly useful to run this code at some point in an application,
+just to get a feel of what each user action implies, for the framework.

doc/learning/how_to_test.md

@@ -30,21 +30,27 @@ To help with this, it is useful to have a `helper.js` file that contains some
 common utility functions:
 
 ```js
-let lastFixture = null;
-
 export function makeTestFixture() {
   let fixture = document.createElement("div");
   document.body.appendChild(fixture);
-  if (lastFixture) {
-    lastFixture.remove();
-  }
-  lastFixture = fixture;
   return fixture;
 }
 
-export async function nextTick() {
-  await new Promise((resolve) => setTimeout(resolve));
-  await new Promise((resolve) => requestAnimationFrame(resolve));
+export function nextTick() {
+  let requestAnimationFrame = owl.Component.scheduler.requestAnimationFrame;
+  return new Promise(function(resolve) {
+    setTimeout(() => requestAnimationFrame(() => resolve()));
+  });
+}
+
+export function makeTestEnv() {
+    // application specific. It needs a way to load actual templates
+    const templates = ...;
+
+    return {
+        qweb: new QWeb(templates),
+        ..., // each service can be mocked here
+    };
 }
 ```
 
@@ -53,7 +59,7 @@ With such a file, a typical test suite for Jest will look like this:
 ```js
 // in SomeComponent.test.js
 import { SomeComponent } from "../../src/ui/SomeComponent";
-import { nextTick, makeTestFixture } from '../helpers';
+import { nextTick, makeTestFixture, makeTestEnv} from '../helpers';
 
 
 //------------------------------------------------------------------------------
@@ -64,6 +70,9 @@ let env: Env;
 
 beforeEach(() => {
   fixture = makeTestFixture();
+  env = makeTestEnv();
+  // we set here the default environment for each component created in the test
+  Component.env = env;
 });
 
 afterEach(() => {
@@ -76,7 +85,8 @@ afterEach(() => {
 describe("SomeComponent", () => {
   test("component behaves as expected", async () => {
     const props = {...}; // depends on the component
-    const comp = await mount(SomeComponent, fixture, { props });
+    const comp = new SomeComponent(null, props);
+    await comp.mount(fixture);
 
     // do some assertions
     expect(...).toBe(...);
@@ -93,3 +103,29 @@ describe("SomeComponent", () => {
 Note that Owl does wait for the next animation frame to actually update the DOM.
 This is why it is necessary to wait with the `nextTick` (or other methods) to
 make sure that the DOM is up-to-date.
+
+It is sometimes useful to wait until Owl is completely done updating components
+(in particular, if we have a highly concurrent user interface). This next
+helper simply polls every 20ms the internal Owl task queue and returns a promise
+which resolves when it is empty:
+
+```js
+function afterUpdates() {
+  return new Promise((resolve, reject) => {
+    let timer = setTimeout(poll, 20);
+    let counter = 0;
+    function poll() {
+      counter++;
+      if (owl.Component.scheduler.tasks.length) {
+        if (counter > 10) {
+          reject(new Error("timeout"));
+        } else {
+          timer = setTimeout(poll);
+        }
+      } else {
+        resolve();
+      }
+    }
+  });
+}
+```

doc/learning/overview.md

@@ -0,0 +1,133 @@
+# 🦉 Quick Overview 🦉
+
+Owl components in an application are used to define a (dynamic) tree of components.
+
+```
+        Root
+        /   \
+       A     B
+      / \
+     C   D
+```
+
+**State:** each component can manage its own local state. It is a simple ES6
+class, there are no special rules:
+
+```js
+class Counter extends Component {
+  static template = xml`
+    <button t-on-click="increment">
+      Click Me! [<t t-esc="state.value"/>]
+    </button>`;
+
+  state = { value: 0 };
+
+  increment() {
+    this.state.value++;
+    this.render();
+  }
+}
+```
+
+The example above shows a component with a local state. Note that since there
+is nothing magical to the `state` object, we need to manually call the `render`
+function whenever we update it. This can quickly become annoying (and not
+efficient if we do it too much). There is a better way: using the `useState`
+hook, which transforms an object into a reactive version of itself:
+
+```js
+const { useState } = owl.hooks;
+
+class Counter extends Component {
+  static template = xml`
+    <button t-on-click="increment">
+      Click Me! [<t t-esc="state.value"/>]
+    </button>`;
+
+  state = useState({ value: 0 });
+
+  increment() {
+    this.state.value++;
+  }
+}
+```
+
+Note that the `t-on-click` handler can even be replaced by an inline statement:
+
+```xml
+    <button t-on-click="state.value++">
+```
+
+**Props:** sub components often needs some information from their parents. This
+is done by adding the required information to the template. This will then be
+accessible by the sub component in the `props` object. Note that there is an
+important rule here: the information contained in the `props` object is not
+owned by the sub component, and should never be modified.
+
+```js
+class Child extends Component {
+  static template = xml`<div>Hello <t t-esc="props.name"/></div>`;
+}
+
+class Parent extends Component {
+  static template = xml`
+    <div>
+        <Child name="'Owl'" />
+        <Child name="'Framework'" />
+    </div>`;
+  static components = { Child };
+}
+```
+
+**Communication:** there are multiple ways to communicate information between
+components. However, the two most important ways are the following:
+
+- from parent to children: by using `props`,
+- from a children to one of its parent: by triggering events.
+
+The following example illustrate both mechanisms:
+
+```js
+class OrderLine extends Component {
+  static template = xml`
+    <div t-on-click="add">
+        <div><t t-esc="props.line.name"/></div>
+        <div>Quantity: <t t-esc="props.line.quantity"/></div>
+    </div>`;
+
+  add() {
+    this.trigger("add-to-order", { line: props.line });
+  }
+}
+
+class Parent extends Component {
+  static template = xml`
+    <div t-on-add-to-order="addToOrder">
+        <OrderLine
+            t-foreach="orders"
+            t-as="line"
+            line="line" />
+    </div>`;
+  static components = { OrderLine };
+  orders = useState([
+    { id: 1, name: "Coffee", quantity: 0 },
+    { id: 2, name: "Tea", quantity: 0 },
+  ]);
+
+  addToOrder(event) {
+    const line = event.detail.line;
+    line.quantity++;
+  }
+}
+```
+
+In this example, the `OrderLine` component trigger a `add-to-order` event. This
+will generate a DOM event which will bubble along the DOM tree. It will then be
+intercepted by the parent component, which will then get the line (from the
+`detail` key) and then increment its quantity. See the page on [event handling](../reference/event_handling.md)
+for more details on how events work.
+
+Note that this example would have also worked if the `OrderLine` component
+directly modifies the `line` object. However, this is not a good practice: this
+only works because the `props` object received by the child component is reactive,
+so the child component is then coupled to the parents implementation.

doc/learning/quick_start.md

@@ -36,8 +36,6 @@ hello_owl/
 The file `owl.js` can be downloaded from the last release published at
 [https://github.com/odoo/owl/releases](https://github.com/odoo/owl/releases). It
 is a single javascript file which export all Owl into the global `owl` object.
-Note that there are multiple files, and in this case, we need one of the two
-files suffixed with `.iife`: they are built to be directly used in a browser.
 
 Now, `index.html` should contain the following:
 
@@ -47,24 +45,31 @@ Now, `index.html` should contain the following:
   <head>
     <title>Hello Owl</title>
     <script src="owl.js"></script>
-  </head>
-  <body>
     <script src="app.js"></script>
-  </body>
+  </head>
+  <body></body>
 </html>
 ```
 
 And `app.js` should look like this:
 
 ```js
-const { Component, mount, xml } = owl;
+const { Component } = owl;
+const { xml } = owl.tags;
+const { whenReady } = owl.utils;
 
 // Owl Components
-class Root extends Component {
+class App extends Component {
   static template = xml`<div>Hello Owl</div>`;
 }
 
-mount(Root, document.body);
+// Setup code
+function setup() {
+  const app = new App();
+  app.mount(document.body);
+}
+
+whenReady(setup);
 ```
 
 Now, simply loading this html file in a browser should display a welcome message.
@@ -89,16 +94,14 @@ Let us start a new project with the following file structure:
 ```
 hello_owl/
   src/
+    app.js
     index.html
     main.js
     owl.js
-    root.js
 ```
 
 As previously, the file `owl.js` can be downloaded from the last release published at
 [https://github.com/odoo/owl/releases](https://github.com/odoo/owl/releases).
-Note that there are multiple files, and in this case, we need one of the two
-files suffixed with `.iife`: they are built to be directly used in a browser.
 
 Now, `index.html` should contain the following:
 
@@ -108,33 +111,38 @@ Now, `index.html` should contain the following:
   <head>
     <title>Hello Owl</title>
     <script src="owl.js"></script>
-  </head>
-  <body>
     <script src="main.js" type="module"></script>
-  </body>
+  </head>
+  <body></body>
 </html>
 ```
 
 Not that the `main.js` script tag has the `type="module"` attribute. This means
 that the browser will parse the script as a module, and load all its dependencies.
 
-Here is the content of `root.js` and `main.js`:
+Here is the content of `app.js` and `main.js`:
 
 ```js
-// root.js ----------------------------------------------------------------------
-const { Component, mount, xml } = owl;
+// app.js ----------------------------------------------------------------------
+const { Component } = owl;
+const { xml } = owl.tags;
 
-export class Root extends Component {
+export class App extends Component {
   static template = xml`<div>Hello Owl</div>`;
 }
 
 // main.js ---------------------------------------------------------------------
-import { Root } from "./root.js";
+import { App } from "./app.js";
 
-mount(Root, document.body);
+function setup() {
+  const app = new App();
+  app.mount(document.body);
+}
+
+owl.utils.whenReady(setup);
 ```
 
-The `main.js` file imports the `root.js` file. Note that the import statement has
+The `main.js` file import the `app.js` file. Note that the import statement has
 a `.js` suffix, which is important. Most text editor can understand this syntax
 and will provide autocompletion.
 
@@ -187,11 +195,11 @@ hello_owl/
     index.html
   src/
     components/
-      Root.js
+      App.js
     main.js
   tests/
     components/
-      Root.test.js
+      App.test.js
     helpers.js
   .gitignore
   package.json
@@ -218,15 +226,13 @@ Note that there are no `<script>` tag here. They will be injected by webpack.
 Now, let's have a look at the javascript files:
 
 ```js
-// src/components/Root.js -------------------------------------------------------
-import { Component, xml, useState } from "@odoo/owl";
+// src/components/App.js -------------------------------------------------------
+import { Component, tags, useState } from "@odoo/owl";
 
-export class Root extends Component {
-  static template = xml`
-    <div t-on-click="update">
-      Hello <t t-esc="state.text"/>
-    </div>`;
+const { xml } = tags;
 
+export class App extends Component {
+  static template = xml`<div t-on-click="update">Hello <t t-esc="state.text"/></div>`;
   state = useState({ text: "Owl" });
   update() {
     this.state.text = this.state.text === "Owl" ? "World" : "Owl";
@@ -234,15 +240,19 @@ export class Root extends Component {
 }
 
 // src/main.js -----------------------------------------------------------------
-import { utils, mount } from "@odoo/owl";
-import { Root } from "./components/Root";
+import { utils } from "@odoo/owl";
+import { App } from "./components/App";
 
-mount(Root, document.body);
+function setup() {
+  const app = new App();
+  app.mount(document.body);
+}
 
-// tests/components/Root.test.js ------------------------------------------------
-import { Root } from "../../src/components/Root";
+utils.whenReady(setup);
+
+// tests/components/App.test.js ------------------------------------------------
+import { App } from "../../src/components/App";
 import { makeTestFixture, nextTick, click } from "../helpers";
-import { mount } from "@odoo/owl";
 
 let fixture;
 
@@ -254,9 +264,10 @@ afterEach(() => {
   fixture.remove();
 });
 
-describe("Root", () => {
+describe("App", () => {
   test("Works as expected...", async () => {
-    await mount(Root, fixture);
+    const app = new App();
+    await app.mount(fixture);
     expect(fixture.innerHTML).toBe("<div>Hello Owl</div>");
 
     click(fixture, "div");
@@ -270,8 +281,9 @@ import { Component } from "@odoo/owl";
 import "regenerator-runtime/runtime";
 
 export async function nextTick() {
-  await new Promise((resolve) => setTimeout(resolve));
-  await new Promise((resolve) => requestAnimationFrame(resolve));
+  return new Promise(function (resolve) {
+    setTimeout(() => Component.scheduler.requestAnimationFrame(() => resolve()));
+  });
 }
 
 export function makeTestFixture() {

doc/learning/tutorial_todoapp.md

@@ -50,11 +50,10 @@ the following content:
     <meta charset="UTF-8" />
     <title>OWL Todo App</title>
     <link rel="stylesheet" href="app.css" />
-  </head>
-  <body>
     <script src="owl.js"></script>
     <script src="app.js"></script>
-  </body>
+  </head>
+  <body></body>
 </html>
 ```
 
@@ -72,34 +71,45 @@ Note that we put everything inside an immediately executed function to avoid lea
 anything to the global scope.
 
 Finally, `owl.js` should be the last version downloaded from the Owl repository (you can use `owl.min.js` if you prefer). Be aware that you should download the `owl.iife.js` or `owl.iife.min.js`, because these files
-are built to run directly on the browser, and rename it `owl.js` (other files such as `owl.cjs.js` are
+are built to run directly on the browser (other files such as `owl.cjs.js` are
 built to be bundled by other tools).
 
 Now, the project should be ready. Loading the `index.html` file into a browser
 should show an empty page, with the title `Owl Todo App`, and it should log a
-message such as `hello owl 2.x.y` in the console.
+message such as `hello owl 1.0.0` in the console.
 
 ## 2. Adding a first component
 
 An Owl application is made out of [components](../reference/component.md), with
-a single root component. Let us start by defining a `Root` component. Replace the
+a single root component. Let us start by defining an `App` component. Replace the
 content of the function in `app.js` by the following code:
 
 ```js
-const { Component, mount, xml } = owl;
+const { Component } = owl;
+const { xml } = owl.tags;
+const { whenReady } = owl.utils;
 
 // Owl Components
-class Root extends Component {
+class App extends Component {
   static template = xml`<div>todo app</div>`;
 }
 
-mount(Root, document.body);
+// Setup code
+function setup() {
+  const app = new App();
+  app.mount(document.body);
+}
+
+whenReady(setup);
 ```
 
 Now, reloading the page in a browser should display a message.
 
-The code is pretty simple: we define a component with an inline template, then
-mount it in the document body.
+The code is pretty simple, but let us explain the last line in more detail. The
+browser tries to execute the javascript code in `app.js` as quickly as possible,
+and it could happen that the DOM is not ready yet when we try to mount the `App`
+component. To avoid this situation, we use the [`whenReady`](../reference/utils.md#whenready)
+helper to delay the execution of the `setup` function until the DOM is ready.
 
 Note 1: in a larger project, we would split the code in multiple files, with
 components in a sub folder, and a main file that would initialize the application.
@@ -140,20 +150,20 @@ with the following keys:
   tasks. Since the title is something created/edited by the user, it offers
   no guarantee that it is unique. So, we will generate a unique `id` number for
   each task.
-- `text`: a string, to explain what the task is about.
+- `title`: a string, to explain what the task is about.
 - `isCompleted`: a boolean, to keep track of the status of the task
 
 Now that we decided on the internal format of the state, let us add some demo
 data and a template to the `App` component:
 
 ```js
-class Root extends Component {
+class App extends Component {
   static template = xml/* xml */ `
     <div class="task-list">
         <t t-foreach="tasks" t-as="task" t-key="task.id">
             <div class="task">
                 <input type="checkbox" t-att-checked="task.isCompleted"/>
-                <span><t t-esc="task.text"/></span>
+                <span><t t-esc="task.title"/></span>
             </div>
         </t>
     </div>`;
@@ -161,12 +171,12 @@ class Root extends Component {
   tasks = [
     {
       id: 1,
-      text: "buy milk",
+      title: "buy milk",
       isCompleted: true,
     },
     {
       id: 2,
-      text: "clean house",
+      title: "clean house",
       isCompleted: false,
     },
   ];
@@ -236,25 +246,29 @@ a little bit:
 // -------------------------------------------------------------------------
 // Task Component
 // -------------------------------------------------------------------------
-class Task extends Component {
-  static template = xml /* xml */`
+const TASK_TEMPLATE = xml /* xml */`
     <div class="task" t-att-class="props.task.isCompleted ? 'done' : ''">
-      <input type="checkbox" t-att-checked="props.task.isCompleted"/>
-      <span><t t-esc="props.task.title"/></span>
+        <input type="checkbox" t-att-checked="props.task.isCompleted"/>
+        <span><t t-esc="props.task.title"/></span>
     </div>`;
-  static props = ["task"];
+
+class Task extends Component {
+    static template = TASK_TEMPLATE;
+    static props = ["task"];
 }
 
 // -------------------------------------------------------------------------
-// Root Component
+// App Component
 // -------------------------------------------------------------------------
-class Root extends Component {
-  static template = xml /* xml */`
+const APP_TEMPLATE = xml /* xml */`
     <div class="task-list">
-      <t t-foreach="tasks" t-as="task" t-key="task.id">
-        <Task task="task"/>
-      </t>
+        <t t-foreach="tasks" t-as="task" t-key="task.id">
+            <Task task="task"/>
+        </t>
     </div>`;
+
+class App extends Component {
+    static template = APP_TEMPLATE;
     static components = { Task };
 
     tasks = [
@@ -263,9 +277,15 @@ class Root extends Component {
 }
 
 // -------------------------------------------------------------------------
-// Setup
+// Setup code
 // -------------------------------------------------------------------------
-mount(Root, document.body, {dev: true});
+function setup() {
+    owl.config.mode = "dev";
+    const app = new App();
+    app.mount(document.body);
+}
+
+whenReady(setup);
 ```
 
 A lot of stuff happened here:
@@ -274,22 +294,24 @@ A lot of stuff happened here:
 - whenever we define a sub component, it needs to be added to the static
   [`components`](../reference/component.md#static-properties)
   key of its parent, so Owl can get a reference to it,
+- the templates have been extracted out of the components, to make it easier to
+  differentiate the "view/template" code from the "script/behavior" code,
 - the `Task` component has a `props` key: this is only useful for validation
   purpose. It says that each `Task` should be given exactly one prop, named
   `task`. If this is not the case, Owl will throw an
   [error](../reference/props_validation.md). This is extremely
   useful when refactoring components
 - finally, to activate the props validation, we need to set Owl's
-  [mode](../reference/config.md#mode) to `dev`. This is done in the last argument
-  of the `mount` function. Note that this should be removed when an app is used in a real
+  [mode](../reference/config.md#mode) to `dev`. This is done in the `setup`
+  function. Note that this should be removed when an app is used in a real
   production environment, since `dev` mode is slightly slower, due to extra
   checks and validations.
 
 ## 6. Adding tasks (part 1)
 
 We still use a list of hardcoded tasks. It's really time to give the user a way
-to add tasks himself. The first step is to add an input to the `Root` component.
-But this input will be outside of the task list, so we need to adapt `Root`
+to add tasks himself. The first step is to add an input to the `App` component.
+But this input will be outside of the task list, so we need to adapt `App`
 template, js, and css:
 
 ```xml
@@ -307,9 +329,9 @@ template, js, and css:
 addTask(ev) {
     // 13 is keycode for ENTER
     if (ev.keyCode === 13) {
-        const text = ev.target.value.trim();
+        const title = ev.target.value.trim();
         ev.target.value = "";
-        console.log('adding task', text);
+        console.log('adding task', title);
         // todo
     }
 }
@@ -338,9 +360,10 @@ task. Notice that when you load the page, the input is not focused. But adding
 tasks is a core feature of a task list, so let us make it as fast as possible by
 focusing the input.
 
-We need to execute code when the `Root` component is ready (mounted). Let's do
-that using the `onMounted` hook. We will also need to get a reference to the
-input, by using the `t-ref` directive with the [`useRef`](../reference/hooks.md#useref) hook:
+Since `App` is a component, it has a
+[`mounted` lifecycle method](../reference/component.md#lifecycle) that we can
+implement. We will also need to get a reference to the input, by using the
+`t-ref` directive with the [`useRef`](../reference/hooks.md#useref) hook:
 
 ```xml
 <input placeholder="Enter a new task" t-on-keyup="addTask" t-ref="add-input"/>
@@ -348,21 +371,22 @@ input, by using the `t-ref` directive with the [`useRef`](../reference/hooks.md#
 
 ```js
 // on top of file:
-const { Component, mount, xml, useRef, onMounted } = owl;
+const { useRef } = owl.hooks;
 ```
 
 ```js
 // in App
-setup() {
-    const inputRef = useRef("add-input");
-    onMounted(() => inputRef.el.focus());
+inputRef = useRef("add-input");
+
+mounted() {
+    this.inputRef.el.focus();
 }
 ```
 
-This is a very common situation: whenever we need to perform some actions depending
-on the lifecycle of a component, we need to do it in the `setup` method, by using
-one of the lifecycle hook. Here, we first get a reference to the `inputRef`,
-then in the `onMounted` hook, we simply focus the html element.
+The `inputRef` is defined as a class field, so it is equivalent to defining it
+in the constructor. It simply instructs Owl to keep a reference to anything with
+the corresponding `t-ref` keyword. We then implement the `mounted` lifecycle
+method, where we now have an active reference that we can use to focus the input.
 
 ## 7. Adding tasks (part 2)
 
@@ -383,12 +407,12 @@ Now, the `addTask` method can be implemented:
 addTask(ev) {
     // 13 is keycode for ENTER
     if (ev.keyCode === 13) {
-        const text = ev.target.value.trim();
+        const title = ev.target.value.trim();
         ev.target.value = "";
-        if (text) {
+        if (title) {
             const newTask = {
                 id: this.nextId++,
-                text: text,
+                title: title,
                 isCompleted: false,
             };
             this.tasks.push(newTask);
@@ -406,7 +430,7 @@ the user interface. We can fix the issue by making `tasks` reactive, with the
 
 ```js
 // on top of the file
-const { Component, mount, xml, useRef, onMounted, useState } = owl;
+const { useRef, useState } = owl.hooks;
 
 // replace the task definition in App with the following:
 tasks = useState([]);
@@ -421,8 +445,12 @@ did not change in opacity. This is because there is no code to modify the
 `isCompleted` flag.
 
 Now, this is an interesting situation: the task is displayed by the `Task`
-component, but it is not the owner of its state, so ideally, it should not modify it.
-However, for now, that's what we will do (this will be improved in a later step).
+component, but it is not the owner of its state, so it cannot modify it. Instead,
+we want to communicate the request to toggle a task to the `App` component.
+Since `App` is a parent of `Task`, we can
+[trigger](../reference/event_handling.md) an event in `Task` and listen
+for it in `App`.
+
 In `Task`, change the `input` to:
 
 ```xml
@@ -433,23 +461,36 @@ and add the `toggleTask` method:
 
 ```js
 toggleTask() {
-  this.props.task.isCompleted = !this.props.task.isCompleted;
+    this.trigger('toggle-task', {id: this.props.task.id});
+}
+```
+
+We now need to listen for that event in the `App` template:
+
+```xml
+<div class="task-list" t-on-toggle-task="toggleTask">
+```
+
+and implement the `toggleTask` code:
+
+```js
+toggleTask(ev) {
+    const task = this.tasks.find(t => t.id === ev.detail.id);
+    task.isCompleted = !task.isCompleted;
 }
 ```
 
 ## 9. Deleting tasks
 
-Let us now add the possibility do delete tasks. This is different from the previous
-feature: deleting task has to be done on the task itself, but the actual operation
-need to be done on the task list. So, we need to communicate the request to the
-`Root` component. This is usually done by providing a callback in a prop.
+Let us now add the possibility do delete tasks. To do that, we first need to add
+a trash icon on each task, then we will proceed just like in the previous section.
 
 First, let us update the `Task` template, css and js:
 
 ```xml
 <div class="task" t-att-class="props.task.isCompleted ? 'done' : ''">
     <input type="checkbox" t-att-checked="props.task.isCompleted" t-on-click="toggleTask"/>
-    <span><t t-esc="props.task.text"/></span>
+    <span><t t-esc="props.task.title"/></span>
     <span class="delete" t-on-click="deleteTask">🗑</span>
 </div>
 ```
@@ -478,226 +519,220 @@ First, let us update the `Task` template, css and js:
 ```
 
 ```js
-static props = ["task", "onDelete"];
-
 deleteTask() {
-    this.props.onDelete(this.props.task);
+    this.trigger('delete-task', {id: this.props.task.id});
 }
 ```
 
-And now, we need to provide the `onDelete` callback to each tasks in the `Root`
-component:
+And now, we need to listen to the `delete-task` event in `App`:
 
 ```xml
-  <Task task="task" onDelete.bind="deleteTask"/>
+<div class="task-list" t-on-toggle-task="toggleTask" t-on-delete-task="deleteTask">
 ```
 
 ```js
-deleteTask(task) {
-    const index = this.tasks.findIndex(t => t.id === task.id);
+deleteTask(ev) {
+    const index = this.tasks.findIndex(t => t.id === ev.detail.id);
     this.tasks.splice(index, 1);
 }
 ```
 
-Notice that the `onDelete` prop is defined with a `.bind` suffix: this is a special
-suffix that makes sure the function callback is bound to the component.
-
 ## 10. Using a store
 
-Looking at the code, it is apparent that all the code handling tasks is scattered
-all around the application. Also, it mixes UI code and business logic
-code. Owl does not provide any high level abstraction to manage business logic,
-but it is easy to do it with the basic reactivity primitives (`useState` and `reactive`).
+Looking at the code, it is apparent that we now have code to handle tasks
+scattered in more than one place. Also, it mixes UI code and business logic
+code. Owl has a way to manage state separately from the user interface: a
+[`Store`](../reference/store.md).
 
-Let us use it in our application to implement a central store. This is a pretty
-large refactoring (for our application), since it involves extracting all task
-related code out of the components. Here is the new content of the `app.js` file:
+Let us use it in our application. This is a pretty large refactoring (for our
+application), since it involves extracting all task related code out of the
+components. Here is the new content of the `app.js` file:
 
 ```js
-const { Component, mount, xml, useRef, onMounted, useState, reactive, useEnv } = owl;
+const { Component, Store } = owl;
+const { xml } = owl.tags;
+const { whenReady } = owl.utils;
+const { useRef, useDispatch, useStore } = owl.hooks;
 
 // -------------------------------------------------------------------------
 // Store
 // -------------------------------------------------------------------------
-function useStore() {
-  const env = useEnv();
-  return useState(env.store);
-}
-
-// -------------------------------------------------------------------------
-// TaskList
-// -------------------------------------------------------------------------
-class TaskList {
-  nextId = 1;
-  tasks = [];
-
-  addTask(text) {
-    text = text.trim();
-    if (text) {
+const actions = {
+  addTask({ state }, title) {
+    title = title.trim();
+    if (title) {
       const task = {
-        id: this.nextId++,
-        text: text,
+        id: state.nextId++,
+        title: title,
         isCompleted: false,
       };
-      this.tasks.push(task);
+      state.tasks.push(task);
     }
-  }
-
-  toggleTask(task) {
+  },
+  toggleTask({ state }, id) {
+    const task = state.tasks.find((t) => t.id === id);
     task.isCompleted = !task.isCompleted;
-  }
-
-  deleteTask(task) {
-    const index = this.tasks.findIndex((t) => t.id === task.id);
-    this.tasks.splice(index, 1);
-  }
-}
-
-function createTaskStore() {
-  return reactive(new TaskList());
-}
+  },
+  deleteTask({ state }, id) {
+    const index = state.tasks.findIndex((t) => t.id === id);
+    state.tasks.splice(index, 1);
+  },
+};
+const initialState = {
+  nextId: 1,
+  tasks: [],
+};
 
 // -------------------------------------------------------------------------
 // Task Component
 // -------------------------------------------------------------------------
-class Task extends Component {
-  static template = xml/* xml */ `
+const TASK_TEMPLATE = xml/* xml */ `
     <div class="task" t-att-class="props.task.isCompleted ? 'done' : ''">
-      <input type="checkbox" t-att-checked="props.task.isCompleted" t-on-click="() => store.toggleTask(props.task)"/>
-      <span><t t-esc="props.task.text"/></span>
-      <span class="delete" t-on-click="() => store.deleteTask(props.task)">🗑</span>
+        <input type="checkbox" t-att-checked="props.task.isCompleted"
+                t-on-click="dispatch('toggleTask', props.task.id)"/>
+        <span><t t-esc="props.task.title"/></span>
+        <span class="delete" t-on-click="dispatch('deleteTask', props.task.id)">🗑</span>
     </div>`;
 
+class Task extends Component {
+  static template = TASK_TEMPLATE;
   static props = ["task"];
-
-  setup() {
-    this.store = useStore();
-  }
+  dispatch = useDispatch();
 }
 
 // -------------------------------------------------------------------------
-// Root Component
+// App Component
 // -------------------------------------------------------------------------
-class Root extends Component {
-  static template = xml/* xml */ `
+const APP_TEMPLATE = xml/* xml */ `
     <div class="todo-app">
-      <input placeholder="Enter a new task" t-on-keyup="addTask" t-ref="add-input"/>
-      <div class="task-list">
-        <t t-foreach="store.tasks" t-as="task" t-key="task.id">
-          <Task task="task"/>
-        </t>
-      </div>
+        <input placeholder="Enter a new task" t-on-keyup="addTask" t-ref="add-input"/>
+        <div class="task-list">
+            <t t-foreach="tasks" t-as="task" t-key="task.id">
+                <Task task="task"/>
+            </t>
+        </div>
     </div>`;
+
+class App extends Component {
+  static template = APP_TEMPLATE;
   static components = { Task };
 
-  setup() {
-    const inputRef = useRef("add-input");
-    onMounted(() => inputRef.el.focus());
-    this.store = useStore();
+  inputRef = useRef("add-input");
+  tasks = useStore((state) => state.tasks);
+  dispatch = useDispatch();
+
+  mounted() {
+    this.inputRef.el.focus();
   }
 
   addTask(ev) {
     // 13 is keycode for ENTER
     if (ev.keyCode === 13) {
-      this.store.addTask(ev.target.value);
+      this.dispatch("addTask", ev.target.value);
       ev.target.value = "";
     }
   }
 }
 
 // -------------------------------------------------------------------------
-// Setup
+// Setup code
 // -------------------------------------------------------------------------
-const env = {
-  store: createTaskStore(),
-};
-mount(Root, document.body, { dev: true, env });
+function setup() {
+  owl.config.mode = "dev";
+  const store = new Store({ actions, state: initialState });
+  App.env.store = store;
+  const app = new App();
+  app.mount(document.body);
+}
+
+whenReady(setup);
 ```
 
-## 11. Saving tasks in local storage
+## 11-Saving tasks in local storage
 
 Now, our TodoApp works great, except if the user closes or refresh the browser!
 It is really inconvenient to only keep the state of the application in memory.
 To fix this, we will save the tasks in the local storage. With our current
-codebase, it is a simple change: we need to save tasks to local storage and
-listen to any change.
+codebase, it is a simple change: only the setup code needs to be updated.
 
 ```js
-class TaskList {
-  constructor(tasks) {
-    this.tasks = tasks || [];
-    const taskIds = this.tasks.map((t) => t.id);
-    this.nextId = taskIds.length ? Math.max(...taskIds) + 1 : 1;
-  }
-  // ...
+function makeStore() {
+  const localState = window.localStorage.getItem("todoapp");
+  const state = localState ? JSON.parse(localState) : initialState;
+  const store = new Store({ state, actions });
+  store.on("update", null, () => {
+    localStorage.setItem("todoapp", JSON.stringify(store.state));
+  });
+  return store;
 }
 
-function createTaskStore() {
-  const saveTasks = () => localStorage.setItem("todoapp", JSON.stringify(taskStore.tasks));
-  const initialTasks = JSON.parse(localStorage.getItem("todoapp") || "[]");
-  const taskStore = reactive(new TaskList(initialTasks), saveTasks);
-  saveTasks();
-  return taskStore;
+function setup() {
+  owl.config.mode = "dev";
+  App.env.store = makeStore();
+  const app = new App();
+  app.mount(document.body);
 }
 ```
 
-The key point is that the `reactive` function takes a callback that will be called
-every time an observed value is changed. Note that we need to call the `saveTasks`
-method initially to make sure we observe all current values.
+The key point is to use the fact that the store is an
+[`EventBus`](../reference/event_bus.md) which triggers an `update` event
+whenever it is updated.
 
 ## 12. Filtering tasks
 
 We are almost done, we can add/update/delete tasks. The only missing feature is
 the possibility to display the task according to their completed status. We will
-need to keep track of the state of the filter in `Root`, then filter the visible
+need to keep track of the state of the filter in `App`, then filter the visible
 tasks according to its value.
 
 ```js
-class Root extends Component {
-  static template = xml /* xml */`
-    <div class="todo-app">
-      <input placeholder="Enter a new task" t-on-keyup="addTask" t-ref="add-input"/>
-      <div class="task-list">
+// on top of file, readd useState:
+const { useRef, useDispatch, useState, useStore } = owl.hooks;
+
+// in App:
+filter = useState({value: "all"})
+
+get displayedTasks() {
+    switch (this.filter.value) {
+        case "active": return this.tasks.filter(t => !t.isCompleted);
+        case "completed": return this.tasks.filter(t => t.isCompleted);
+        case "all": return this.tasks;
+    }
+}
+
+setFilter(filter) {
+    this.filter.value = filter;
+}
+```
+
+Finally, we need to display the visible filters. We can do that, and at the
+same time, display the number of tasks in a small panel below the main list:
+
+```xml
+<div class="todo-app">
+    <input placeholder="Enter a new task" t-on-keyup="addTask" t-ref="add-input"/>
+    <div class="task-list">
         <t t-foreach="displayedTasks" t-as="task" t-key="task.id">
-          <Task task="task"/>
+            <Task task="task"/>
         </t>
-      </div>
-      <div class="task-panel" t-if="store.tasks.length">
+    </div>
+    <div class="task-panel" t-if="tasks.length">
         <div class="task-counter">
-          <t t-esc="displayedTasks.length"/>
-          <t t-if="displayedTasks.length lt store.tasks.length">
-              / <t t-esc="store.tasks.length"/>
-          </t>
-          task(s)
+            <t t-esc="displayedTasks.length"/>
+            <t t-if="displayedTasks.length lt tasks.length">
+                / <t t-esc="tasks.length"/>
+            </t>
+            task(s)
         </div>
         <div>
-          <span t-foreach="['all', 'active', 'completed']"
-            t-as="f" t-key="f"
-            t-att-class="{active: filter.value===f}"
-            t-on-click="() => this.setFilter(f)"
-            t-esc="f"/>
+            <span t-foreach="['all', 'active', 'completed']"
+                t-as="f" t-key="f"
+                t-att-class="{active: filter.value===f}"
+                t-on-click="setFilter(f)"
+                t-esc="f"/>
         </div>
-      </div>
-    </div>`;
-
-  setup() {
-    ...
-    this.filter = useState({ value: "all" });
-  }
-
-  get displayedTasks() {
-    const tasks = this.store.tasks;
-    switch (this.filter.value) {
-      case "active": return tasks.filter(t => !t.isCompleted);
-      case "completed": return tasks.filter(t => t.isCompleted);
-      case "all": return tasks;
-    }
-  }
-
-  setFilter(filter) {
-    this.filter.value = filter;
-  }
-}
+    </div>
+</div>
 ```
 
 ```css
@@ -722,8 +757,8 @@ class Root extends Component {
 }
 ```
 
-Notice here that we set dynamically the css class of the filter with the object
-syntax.
+Notice here that we set dynamically the class of the filter with the object
+syntax: each key is a class that we want to set if its value is truthy.
 
 ## 13. The Final Touch
 
@@ -738,16 +773,16 @@ the user experience.
 }
 ```
 
-2. Make the text of a task clickable, to toggle its checkbox:
+2. Make the title of a task clickable, to toggle its checkbox:
 
 ```xml
 <input type="checkbox" t-att-checked="props.task.isCompleted"
     t-att-id="props.task.id"
     t-on-click="dispatch('toggleTask', props.task.id)"/>
-<label t-att-for="props.task.id"><t t-esc="props.task.text"/></label>
+<label t-att-for="props.task.id"><t t-esc="props.task.title"/></label>
 ```
 
-3. Strike the text of completed task:
+3. Strike the title of completed task:
 
 ```css
 .task.done label {
@@ -779,145 +814,143 @@ For reference, here is the final code:
 
 ```js
 (function () {
-  const { Component, mount, xml, useRef, onMounted, useState, reactive, useEnv } = owl;
+  const { Component, Store } = owl;
+  const { xml } = owl.tags;
+  const { whenReady } = owl.utils;
+  const { useRef, useDispatch, useState, useStore } = owl.hooks;
 
   // -------------------------------------------------------------------------
   // Store
   // -------------------------------------------------------------------------
-  function useStore() {
-    const env = useEnv();
-    return useState(env.store);
-  }
-
-  // -------------------------------------------------------------------------
-  // TaskList
-  // -------------------------------------------------------------------------
-  class TaskList {
-    constructor(tasks) {
-      this.tasks = tasks || [];
-      const taskIds = this.tasks.map((t) => t.id);
-      this.nextId = taskIds.length ? Math.max(...taskIds) + 1 : 1;
-    }
-
-    addTask(text) {
-      text = text.trim();
-      if (text) {
+  const actions = {
+    addTask({ state }, title) {
+      title = title.trim();
+      if (title) {
         const task = {
-          id: this.nextId++,
-          text: text,
+          id: state.nextId++,
+          title: title,
           isCompleted: false,
         };
-        this.tasks.push(task);
+        state.tasks.push(task);
       }
-    }
-
-    toggleTask(task) {
+    },
+    toggleTask({ state }, id) {
+      const task = state.tasks.find((t) => t.id === id);
       task.isCompleted = !task.isCompleted;
-    }
+    },
+    deleteTask({ state }, id) {
+      const index = state.tasks.findIndex((t) => t.id === id);
+      state.tasks.splice(index, 1);
+    },
+  };
 
-    deleteTask(task) {
-      const index = this.tasks.findIndex((t) => t.id === task.id);
-      this.tasks.splice(index, 1);
-    }
-  }
-
-  function createTaskStore() {
-    const saveTasks = () => localStorage.setItem("todoapp", JSON.stringify(taskStore.tasks));
-    const initialTasks = JSON.parse(localStorage.getItem("todoapp") || "[]");
-    const taskStore = reactive(new TaskList(initialTasks), saveTasks);
-    saveTasks();
-    return taskStore;
-  }
+  const initialState = {
+    nextId: 1,
+    tasks: [],
+  };
 
   // -------------------------------------------------------------------------
   // Task Component
   // -------------------------------------------------------------------------
+  const TASK_TEMPLATE = xml/* xml */ `
+    <div class="task" t-att-class="props.task.isCompleted ? 'done' : ''">
+        <input type="checkbox" t-att-checked="props.task.isCompleted"
+            t-att-id="props.task.id"
+            t-on-click="dispatch('toggleTask', props.task.id)"/>
+        <label t-att-for="props.task.id"><t t-esc="props.task.title"/></label>
+        <span class="delete" t-on-click="dispatch('deleteTask', props.task.id)">🗑</span>
+    </div>`;
+
   class Task extends Component {
-    static template = xml/* xml */ `
-      <div class="task" t-att-class="props.task.isCompleted ? 'done' : ''">
-        <input type="checkbox"
-          t-att-id="props.task.id"
-          t-att-checked="props.task.isCompleted"
-          t-on-click="() => store.toggleTask(props.task)"/>
-        <label t-att-for="props.task.id"><t t-esc="props.task.text"/></label>
-        <span class="delete" t-on-click="() => store.deleteTask(props.task)">🗑</span>
-      </div>`;
-
+    static template = TASK_TEMPLATE;
     static props = ["task"];
-
-    setup() {
-      this.store = useStore();
-    }
+    dispatch = useDispatch();
   }
 
   // -------------------------------------------------------------------------
-  // Root Component
+  // App Component
   // -------------------------------------------------------------------------
-  class Root extends Component {
-    static template = xml/* xml */ `
-      <div class="todo-app">
+  const APP_TEMPLATE = xml/* xml */ `
+    <div class="todo-app">
         <input placeholder="Enter a new task" t-on-keyup="addTask" t-ref="add-input"/>
         <div class="task-list">
-          <t t-foreach="displayedTasks" t-as="task" t-key="task.id">
-            <Task task="task"/>
-          </t>
+            <Task t-foreach="displayedTasks" t-as="task" t-key="task.id" task="task"/>
         </div>
-        <div class="task-panel" t-if="store.tasks.length">
-          <div class="task-counter">
-            <t t-esc="displayedTasks.length"/>
-            <t t-if="displayedTasks.length lt store.tasks.length">
-                / <t t-esc="store.tasks.length"/>
-            </t>
-            task(s)
-          </div>
-          <div>
-            <span t-foreach="['all', 'active', 'completed']"
-              t-as="f" t-key="f"
-              t-att-class="{active: filter.value===f}"
-              t-on-click="() => this.setFilter(f)"
-              t-esc="f"/>
-          </div>
+        <div class="task-panel" t-if="tasks.length">
+            <div class="task-counter">
+                <t t-esc="displayedTasks.length"/>
+                <t t-if="displayedTasks.length lt tasks.length">
+                    / <t t-esc="tasks.length"/>
+                </t>
+                task(s)
+            </div>
+            <div>
+                <span t-foreach="['all', 'active', 'completed']"
+                    t-as="f" t-key="f"
+                    t-att-class="{active: filter.value===f}"
+                    t-on-click="setFilter(f)"
+                    t-esc="f"/>
+            </div>
         </div>
-      </div>`;
+    </div>`;
+
+  class App extends Component {
+    static template = APP_TEMPLATE;
     static components = { Task };
 
-    setup() {
-      const inputRef = useRef("add-input");
-      onMounted(() => inputRef.el.focus());
-      this.store = useStore();
-      this.filter = useState({ value: "all" });
+    inputRef = useRef("add-input");
+    tasks = useStore((state) => state.tasks);
+    filter = useState({ value: "all" });
+    dispatch = useDispatch();
+
+    mounted() {
+      this.inputRef.el.focus();
     }
 
     addTask(ev) {
       // 13 is keycode for ENTER
       if (ev.keyCode === 13) {
-        this.store.addTask(ev.target.value);
+        this.dispatch("addTask", ev.target.value);
         ev.target.value = "";
       }
     }
 
     get displayedTasks() {
-      const tasks = this.store.tasks;
       switch (this.filter.value) {
         case "active":
-          return tasks.filter((t) => !t.isCompleted);
+          return this.tasks.filter((t) => !t.isCompleted);
         case "completed":
-          return tasks.filter((t) => t.isCompleted);
+          return this.tasks.filter((t) => t.isCompleted);
         case "all":
-          return tasks;
+          return this.tasks;
       }
     }
-
     setFilter(filter) {
       this.filter.value = filter;
     }
   }
 
   // -------------------------------------------------------------------------
-  // Setup
+  // Setup code
   // -------------------------------------------------------------------------
-  const env = { store: createTaskStore() };
-  mount(Root, document.body, { dev: true, env });
+  function makeStore() {
+    const localState = window.localStorage.getItem("todoapp");
+    const state = localState ? JSON.parse(localState) : initialState;
+    const store = new Store({ state, actions });
+    store.on("update", null, () => {
+      localStorage.setItem("todoapp", JSON.stringify(store.state));
+    });
+    return store;
+  }
+
+  function setup() {
+    owl.config.mode = "dev";
+    App.env.store = makeStore();
+    const app = new App();
+    app.mount(document.body);
+  }
+
+  whenReady(setup);
 })();
 ```
 

doc/miscellaneous/comparison.md

@@ -4,7 +4,7 @@ OWL, React and Vue have the same main feature: they allow developers to build
 declarative user interfaces. To do that, all these frameworks uses a virtual dom. However, there are still obviously many differences.
 
 In this page, we try to highlight some of these differences. Obviously, a lot of
-effort was put to be fair. However, if you disagree with some of the points
+effort was done to be fair. However, if you disagree with some of the points
 discussed, feel free to open an issue/submit a PR to correct this text.
 
 ## Content
@@ -14,7 +14,8 @@ discussed, feel free to open an issue/submit a PR to correct this text.
 - [Tooling/Build Step](#toolingbuild-step)
 - [Templating](#templating)
 - [Asynchronous rendering](#asynchronous-rendering)
-- [Reactivity](#reactivity)
+- [Reactiveness](#reactiveness)
+- [State Management](#state-management)
 - [Hooks](#hooks)
 
 ## Size
@@ -46,7 +47,7 @@ components are fast enough for all our usecases, and making it as simple as
 possible for developers is more valuable (for us).
 
 Also, functions or class based components are more than just syntax. Functions
-come with a mindset of composition and class are about inheritance. Clearly,
+comes with a mindset of composition and class are about inheritance. Clearly,
 both of these are important mechanisms for reusing code. Also, one does not
 exclude the other.
 
@@ -172,7 +173,7 @@ more convoluted. For example, in Vue, you need to use a dynamic import keyword
 that needs to be transpiled at build time in order for the component to be loaded
 asynchronously (see [the documentation](https://vuejs.org/v2/guide/components-dynamic-async.html#Async-Components)).
 
-## Reactivity
+## Reactiveness
 
 React has a simple model: whenever the state changes, it is
 replaced with a new state (via the `setState` method). Then, the DOM is patched.
@@ -188,6 +189,95 @@ with a `Proxy`, which means that it is totally transparent to the developers.
 Adding new keys is supported. Once any part of the state has been changed, a
 rendering is scheduled in the next microtask tick (promise queue).
 
+## State Management
+
+Managing the state of an application is a tricky issue. Many solutions have
+been proposed these last few years. It also depends on the kind of application we
+are talking about. A small application may not need much more than a simple
+object to contain its state.
+
+However, there are some common solutions for React and Vue: redux and vuex.
+Both of them are a centralized store that own the state, and they dictate how
+the state can be mutated.
+
+**Redux**
+
+In Redux, the state is mutated by reducers. Reducers are functions
+that modify the state by returning a different object:
+
+```javascript
+  ...
+  switch (action.type) {
+    case ADD_TODO: {
+      const { id, content } = action.payload;
+      return {
+        ...state,
+        allIds: [...state.allIds, id],
+        byIds: {
+          ...state.byIds,
+          [id]: {
+            content,
+            completed: false
+          }
+        }
+      };
+    }
+```
+
+This is a little bit awkward to write, but this allows the component system to
+check if a part of the state was changed. This is exactly what is done by the
+`connect` function: it create a _connected_ component, which is subscribed to
+the state and triggers a rerender if some part of the state was modified.
+
+**VueX**
+
+VueX is based on a different principle: the state is mutated through
+some special functions (the mutations), which modify the state in place:
+
+```javascript
+    function ({state}, payload) {
+        const { id, content } = payload;
+        const message = {id, content, completed: false};
+        state.messages.push(message)
+    }
+```
+
+This is simpler, but there is a little bit more happening behind the scene:
+each key from the state is silently replaced by getters and setters, and VueX
+keeps track of who get data, and retrigger a render when it was changed.
+
+**Owl**
+
+Owl store is a little bit like a mix of redux and vuex: it has actions (but not
+mutations), and like VueX, it keeps track of the state changes. However, it does
+not notify a component when the state changes. Instead, components need to connect
+to the store like in redux, with the `useStore` hook (see the [store documentation](../reference/store.md#connecting-a-component)).
+
+```javascript
+const actions = {
+  increment({ state }, val) {
+    state.counter.value += val;
+  },
+};
+
+const state = {
+  counter: { value: 0 },
+};
+const store = new owl.Store({ state, actions });
+
+class Counter extends Component {
+  static template = xml`
+      <button t-name="Counter" t-on-click="dispatch('increment')">
+        Click Me! [<t t-esc="counter.value"/>]
+      </button>`;
+  counter = useStore((state) => state.counter);
+  dispatch = useDispatch();
+}
+
+Counter.env.store = store;
+const counter = new Counter();
+```
+
 ## Hooks
 
 [Hooks](https://reactjs.org/docs/hooks-intro.html#motivation) recently took over
@@ -252,4 +342,4 @@ class Example extends Component {
 
 Since the Owl framework had hooks from early in its life, its main APIs
 are designed to be interacted with hooks from the start. For example, the
-`Context` abstraction.
+`Context` and `Store` abstractions.

doc/miscellaneous/why_owl.md

@@ -61,14 +61,14 @@ because a lot of the state is hidden in their internals.
 
 React or Vue have a huge community, and a lot of effort have been made into their
 tooling. This is wonderful, but at the same time, a pretty big issue for Odoo:
-since the assets are totally dynamic (and could change whenever the user installs
-or removes an addon), we need to have all that kind of tooling on the production
+since the assets are totally dynamic (and could change whenever the user install
+or remove an addon), we need to have all that kind of tooling on the production
 servers. This is certainly not ideal.
 
 Also, this makes it very complicated to setup Vue or React tools: Odoo code is
 not a simple file that import other files. It changes all the time, assets
 are bundled differently in different contexts. This is the reason why Odoo has
-its own module system, which are resolved at runtime, by the browser. The
+its own module system, which are resolve at runtime, by the browser. The
 dynamic nature of Odoo means that we often need to delay work as late as possible
 (in other word, we want a JIT user interface!)
 
@@ -78,12 +78,12 @@ deploy. Using React without JSX, or Vue without vue file is not very appealing.
 At the same time, Owl is designed to solve this issue: it compiles templates
 by the browser, it doesn't need much code for that, since we use the XML parser
 built into each browser. Owl works with or without any additional tooling. It
-can use template strings to write single file components, and is easy to integrate
+can use template strings to write single file component, and is easy to integrate
 in any html page, with a simple `<script>` tag.
 
 ## Template based
 
-Odoo stores templates as XML documents in a database. This is very powerful, since
+Odoo stores template as XML document in a database. This is very powerful, since
 this allow the use of xpaths to customize other templates. This is a very
 important feature of odoo, and one of the key to Odoo modularity.
 
@@ -104,12 +104,12 @@ awkward, and very confusing.
 ## Developer Experience
 
 This brings us to the following point: developer experience. We see this choice
-as an investment for the future, and we want to make onboarding developers as
+as an investment for the future, and we want to make onboarding developer as
 easy as possible.
 
 While many javascript professionals clearly think that react/vue is not difficult
 (which is true to some extent), it is alsy true that many non js specialists are
-overwhelmed with the frontend world: functional components, hooks, and many other
+overwhelmed with the frontend world: functional component, hooks, and many other
 fancy words. Also, what is available in the compilation context may be difficult,
 there is a lot of black magic going on in pretty much every framework. Vue
 somehow join various namespaces into one, under the hood, and add various internal
@@ -135,7 +135,7 @@ needs: Odoo will fetch templates from the database and need to compile them only
 at the last possible moment, so we can apply all necessary xpaths.
 
 Even more: Odoo needs to be able to generate (and compile) templates at runtime.
-Currently, Odoo form views interpret an xml description. But the form view code
+Currently, Odoo form views interpret a xml description. But the form view code
 then needs to do a lot of complicated operations. With Owl, we will be able to
 transform a view description into a QWeb template, then compile that and use it
 immediately.
@@ -147,16 +147,16 @@ For example, the reactivity system. We like the way Vue did it, but it has a
 flaw: it is not really optional. There is actually a way to opt out of the reactivity
 system by freezing the state, but then, it is freezed.
 
-And there certainly are situations where we need a state, which is not read-only,
+And there certainly are situations where we need a state, which is not readonly,
 and not observed. For example, imagine a spreadsheet component. It may have a
 very large internal state, and it knows exactly when it needs to be rendered
-(basically, whenever the user performs some action). Then, observing its state
+(basically, whenever the user perform some action). Then, observing its state
 is a net performance loss, both for the CPU and the memory.
 
 ## Concurrency
 
 Many applications are happy to simply display a spinner whenever a new asynchronous
-action is performed, but Odoo wants a different user experience: most asynchronous
+action is performed, but Odoo want a different user experience: most asynchronous
 state changes are not displayed until ready. This is sometimes called a concurrent
 mode: the UI is rendered in memory, and displayed only when it is ready (and
 only if it has not been cancelled by subsequent user actions).
@@ -175,6 +175,6 @@ that current standard frameworks are not tailored to our needs. It is perfectly
 fine, because they each chose a different set of tradeoffs.
 
 However, we feel that there is still room in the framework world for something
-that is different. For a framework that makes choices compatible with Odoo.
+that is different. For a framework that make choices compatible with Odoo.
 
 And that is why we built Owl 🦉.

doc/readme.md

@@ -0,0 +1,55 @@
+# 🦉 OWL Documentation 🦉
+
+## Learning Owl
+
+Are you new to Owl? This is the place to start!
+
+- [Tutorial: create a TodoList application](learning/tutorial_todoapp.md)
+- [Quick Overview](learning/overview.md)
+- [How to start an Owl project](learning/quick_start.md)
+- [How to test Components](learning/how_to_test.md)
+- [How to write Single File Components](learning/how_to_write_sfc.md)
+- [How to write debug Owl applications](learning/how_to_debug.md)
+
+## Reference
+
+You will find here a complete reference of every feature, class or object
+provided by Owl.
+
+- [Animations](reference/animations.md)
+- [Component](reference/component.md)
+- [Content](reference/content.md)
+- [Concurrency Model](reference/concurrency_model.md)
+- [Configuration](reference/config.md)
+- [Context](reference/context.md)
+- [Environment](reference/environment.md)
+- [Event Bus](reference/event_bus.md)
+- [Event Handling](reference/event_handling.md)
+- [Error Handling](reference/error_handling.md)
+- [Hooks](reference/hooks.md)
+- [Miscellaneous Components](reference/misc.md)
+- [Observer](reference/observer.md)
+- [Props](reference/props.md)
+- [Props Validation](reference/props_validation.md)
+- [QWeb Templating Language](reference/qweb_templating_language.md)
+- [QWeb Engine](reference/qweb_engine.md)
+- [Router](reference/router.md)
+- [Store](reference/store.md)
+- [Slots](reference/slots.md)
+- [Tags](reference/tags.md)
+- [Utils](reference/utils.md)
+
+## Other Topics
+
+This section provides miscellaneous document that explains some topics
+which cannot be considered either a tutorial, or reference documentation.
+
+- [Owl architecture: the Virtual DOM](miscellaneous/vdom.md)
+- [Owl architecture: the rendering pipeline](miscellaneous/rendering.md)
+- [Comparison with React/Vue](miscellaneous/comparison.md)
+- [Why did Odoo built Owl?](miscellaneous/why_owl.md)
+
+---
+
+Found an issue in the documentation? A broken link? Some outdated information?
+Please open an issue or submit a PR!

doc/reference/animations.md

@@ -52,20 +52,21 @@ sequence of events will happen:
 At node insertion:
 
 - the css classes `name-enter` and `name-enter-active` will be added directly
-  when the node is inserted into the DOM.
+  when the node is inserted into the DOM,
 - on the next animation frame: the css class `name-enter` will be removed and the
   class `name-enter-to` will be added (so they can be used to trigger css
-  transition effects).
-- at the end of the transition, `name-enter-to` and `name-enter-active` will be removed.
+  transition effects),
+- the css class `name-enter-active` will be removed whenever a css transition
+  ends.
 
 At node destruction:
 
 - the css classes `name-leave` and `name-leave-active` will be added before the
-  node is removed to the DOM.
-- on the next animation frame: the css class `name-leave` will be removed and the
-  class `name-leave-to` will be added (so they can be used to trigger css
-  transition effects).
-- at the end of the transition, `name-leave-to` and `name-leave-active` will be removed.
+  node is removed to the DOM,
+- the css class `name-leave` will be removed on the next animation frame (so it
+  can be used to trigger css transition effects),
+- the css class `name-leave-active` will be removed whenever a css transition
+  ends. Only then will the element be removed from the DOM.
 
 For example, a simple fade in/out effect can be done with this:
 
@@ -92,36 +93,3 @@ Notes:
 
 Owl does not support more than one transition on a single node, so the
 `t-transition` expression must be a single value (i.e. no space allowed).
-
-## SCSS Mixins
-
-If you use SCSS, you can use mixins to make generic animations. Here is an exemple with a fade in / fade out animation:
-
-```scss
-@mixin animation-fade($time, $name) {
-  .#{$name}_fade-enter-active,
-  .#{$name}_fade-active {
-    transition: all $time;
-  }
-
-  .#{$name}_fade-enter {
-    opacity: 0;
-  }
-
-  .#{$name}_fade-leave-to {
-    opacity: 0;
-  }
-}
-```
-
-Usage:
-
-```scss
-@include animation-fade(0.5s, "o_notification");
-```
-
-You can now have in your template:
-
-```xml
-<SomeTag  t-transition="o_notification_fade"/>
-```

doc/reference/browser.md

@@ -1,33 +0,0 @@
-# 🦉 Browser 🦉
-
-## Content
-
-- [Overview](#overview)
-- [Browser Content](#browser-content)
-
-## Overview
-
-The browser object contains some browser native APIs, such as `setTimeout`, that
-are used by Owl and its utility functions. They are exposed with the intent of
-making them mockable if necessary.
-
-```js
-owl.browser.setTimeout === window.setTimeout; // return true
-```
-
-For now, this object contains some functions that are not used by Owl. They
-will eventually be removed in Owl 2.0.
-
-## Browser Content
-
-More specifically, the `browser` object contains the following methods and objects:
-
-- `setTimeout`
-- `clearTimeout`
-- `setInterval`
-- `clearInterval`
-- `requestAnimationFrame`
-- `random`
-- `Date`
-- `fetch`
-- `localStorage`

doc/reference/component.md

@@ -10,22 +10,13 @@
   - [Static Properties](#static-properties)
   - [Methods](#methods)
   - [Lifecycle](#lifecycle)
-    - [`constructor(parent, props)`](#constructorparent-props)
-    - [`setup()`](#setup)
-    - [`willStart()`](#willstart)
-    - [`mounted()`](#mounted)
-    - [`willUpdateProps(nextProps)`](#willupdatepropsnextprops)
-    - [`willPatch()`](#willpatch)
-    - [`patched(snapshot)`](#patchedsnapshot)
-    - [`willUnmount()`](#willunmount)
-    - [`catchError(error)`](#catcherrorerror)
   - [Root Component](#root-component)
   - [Composition](#composition)
   - [Form Input Bindings](#form-input-bindings)
   - [References](#references)
   - [Dynamic sub components](#dynamic-sub-components)
   - [Functional Components](#functional-components)
-  - [SVG Components](#svg-components)
+  - [SVG components](#svg-components)
 
 ## Overview
 
@@ -263,7 +254,7 @@ We explain here all the public methods of the `Component` class.
 
   Note that if a component is mounted, unmounted and remounted, it will be
   automatically re-rendered to ensure that changes in its state (or something
-  in the environment) will be taken into account.
+  in the environment, or in the store, or ...) will be taken into account.
 
   If a component is mounted inside an element or a fragment which is not in the
   DOM, then it will be rendered fully, but not active: the `mounted` hooks will
@@ -279,10 +270,6 @@ We explain here all the public methods of the `Component` class.
   // app is now visible
   ```
 
-  Note that the normal way of mounting an application is by using the `mount`
-  method on a component class, not by creating the instance by hand. See the
-  documentation on [mounting applications](mounting.md).
-
 * **`unmount()`**: in case a component needs to be detached/removed from the DOM, this
   method can be used. Most applications should not call `unmount`, this is more
   useful to the underlying component system.
@@ -298,13 +285,8 @@ We explain here all the public methods of the `Component` class.
   are updated. It returns a boolean, which indicates if the component should
   ignore a props update. If it returns false, then `willUpdateProps` will not
   be called, and no rendering will occur. Its default implementation is to
-  always return true. Note that this is an optimization, similar to React's `shouldComponentUpdate`. Most of the time, this should not be used, but it
-  can be useful if we are handling large number of components. Since this is an
-  optimization, Owl has the freedom to ignore the result of `shouldUpdate` in
-  some cases (for example, if a component is remounted, or if we want to force
-  a full rerender of the UI). However, if `shouldUpdate` returns true, then Owl
-  provides the guarantee that the component will be rendered at some point in
-  the future (except if the component is destroyed or if some part of the UI crashes).
+  always return true. This is an optimization, similar to React's `shouldComponentUpdate`. Most of the time, this should not be used, but it
+  can be useful if we are handling large number of components.
 
 * **`destroy()`**. As its name suggests, this method will remove the component,
   and perform all necessary cleanup, such as unmounting the component, its children,
@@ -325,7 +307,7 @@ a owl component:
 
 | Method                                           | Description                                                 |
 | ------------------------------------------------ | ----------------------------------------------------------- |
-| **[setup](#setup)**                              | setup                                                       |
+| **[constructor](#constructorparent-props)**      | constructor                                                 |
 | **[willStart](#willstart)**                      | async, before first rendering                               |
 | **[mounted](#mounted)**                          | just after component is rendered and added to the DOM       |
 | **[willUpdateProps](#willupdatepropsnextprops)** | async, before props update                                  |
@@ -370,23 +352,6 @@ class ClickCounter extends owl.Component {
 }
 ```
 
-Hook functions can be called in the constructor.
-
-#### `setup()`
-
-_setup_ is run just after the component is constructed. It is a lifecycle method,
-very similar to the _constructor_, except that it does not receive any argument.
-
-It is a valid method to call hook functions. Note that one of the main reason to
-have the `setup` hook in the component lifecycle is to make it possible to
-monkey patch it. It is a common need in the Odoo ecosystem.
-
-```javascript
-setup() {
-  useSetupAutofocus();
-}
-```
-
 #### `willStart()`
 
 willStart is an asynchronous hook that can be implemented to
@@ -789,7 +754,7 @@ template rendered with `props`. In Owl, this can be done by
 simply defining a template, that will access the `props` object:
 
 ```js
-const Welcome = xml`<h1>Hello, <t t-esc="props.name"/></h1>`;
+const Welcome = xml`<h1>Hello, {props.name}</h1>`;
 
 class MyComponent extends Component {
   static template = xml`

doc/reference/concurrency_model.md

@@ -158,10 +158,12 @@ There are two different common problems with Owl asynchronous rendering model:
 Here are a few tips on how to work with asynchronous components:
 
 1. Minimize the use of asynchronous components!
-2. Lazy loading external libraries is a good use case for async rendering. This
+2. Maybe move the asynchronous logic in a store, which then triggers (mostly)
+   synchronous renderings
+3. Lazy loading external libraries is a good use case for async rendering. This
    is mostly fine, because we can assume that it will only takes a fraction of a
    second, and only once (see [`owl.utils.loadJS`](utils.md#loadjs))
-3. For all the other cases, the [`AsyncRoot`](misc.md#asyncroot) component is there to help you. When
+4. For all the other cases, the [`AsyncRoot`](misc.md#asyncroot) component is there to help you. When
    this component is met, a new rendering
    sub tree is created, such that the rendering of that component (and its
    children) is not tied to the rendering of the rest of the interface. It can

doc/reference/content.md

@@ -7,30 +7,30 @@ For example, `Component` is available at `owl.Component` and `EventBus` is
 exported as `owl.core.EventBus`.
 
 ```
-browser
 Component                               misc
 Context                                     AsyncRoot
 QWeb                                        Portal
-mount
-useState                                tags
-config                                      css
-    mode                                    xml
-core                                    utils
-    EventBus                                debounce
-    Observer                                escape
-hooks                                       loadJS
-    onWillStart                             loadFile
-    onMounted                               shallowEqual
-    onWillUpdateProps                       whenReady
-    onWillPatch
-    onPatched
-    onWillUnmount
+Store                                   router
+useState                                    Link
+config                                      RouteComponent
+    mode                                    Router
+core                                    tags
+    EventBus                                css
+    Observer                                xml
+hooks                                   utils
+    onWillStart                             debounce
+    onMounted                               escape
+    onWillUpdateProps                       loadJS
+    onWillPatch                             loadFile
+    onPatched                               shallowEqual
+    onWillUnmount                           whenReady
     useContext
     useState
     useRef
-    useComponent
-    useEnv
     useSubEnv
+    useStore
+    useDispatch
+    useGetters
 ```
 
 Note that for convenience, the `useState` hook is also exported at the root of the `owl` object.

doc/reference/environment.md

@@ -49,14 +49,15 @@ The correct way to customize an environment is to simply set it up on the root
 component class, before the first component is created:
 
 ```js
-const env = {
+App.env = {
     _t: myTranslateFunction,
     user: {...},
     services: {
         ...
     },
 };
-mount(App, { target: document.body, env });
+const app = new App();
+app.mount(document.body);
 ```
 
 It is also possible to simply share an environment between all root components,
@@ -120,8 +121,9 @@ async function myEnv() {
 }
 
 async function start() {
-  const env = await myEnv();
-  mount(App, { target: document.body, env });
+  App.env = await myEnv();
+  const app = new App();
+  await app.mount(document.body);
 }
 ```
 
@@ -133,4 +135,17 @@ the `QWeb` instance and a `browser` object:
 - `qweb` will be set to an empty `QWeb` instance. This is absolutely necessary
   for Owl to be able to render anything
 - `browser`: this is an object that contains some common access points to the
-  browser methods with a side effect. See [browser](browser.md) for more information. Note that the browser object will be removed from the environment in Owl 2.0.
+  browser methods with a side effect. This is particularly useful when one want
+  to test more advanced components, and be able to mock those methods.
+
+More specifically, the `browser` object contains the following methods and objects:
+
+- `setTimeout`
+- `clearTimeout`
+- `setInterval`
+- `clearInterval`
+- `requestAnimationFrame`
+- `random`
+- `Date`
+- `fetch`
+- `localStorage`

doc/reference/event_bus.md

@@ -23,3 +23,5 @@ Its API is:
 | `off(eventType, owner)`          | remove all listeners for an owner |
 | `trigger(eventType, ...args)`    | trigger an event                  |
 | `clear`                          | remove all subscriptions          |
+
+Note that the [`Store`](store.md) is an example of an `EventBus`.

doc/reference/hooks.md

@@ -18,8 +18,9 @@
   - [`useRef`](#useref)
   - [`useSubEnv`](#usesubenv)
   - [`useExternalListener`](#useexternallistener)
-  - [`useComponent`](#usecomponent)
-  - [`useEnv`](#useenv)
+  - [`useStore`](#usestore)
+  - [`useDispatch`](#usedispatch)
+  - [`useGetters`](#usegetters)
   - [Making customized hooks](#making-customized-hooks)
 
 ## Overview
@@ -128,7 +129,7 @@ class SomeComponent extends Component {
 ### One rule
 
 There is only one rule: every hook for a component has to be called in the
-constructor, in the _setup_ method, or in class fields:
+constructor (or in class fields):
 
 ```js
 // ok
@@ -144,13 +145,6 @@ class SomeComponent extends Component {
   }
 }
 
-// also ok
-class SomeComponent extends Component {
-  setup() {
-    this.state = useState({ value: 0 });
-  }
-}
-
 // not ok: this is executed after the constructor is called
 class SomeComponent extends Component {
   async willStart() {
@@ -372,15 +366,20 @@ to be closed:
 useExternalListener(window, "click", this.closeMenu);
 ```
 
-### `useComponent`
+### `useStore`
 
-The `useComponent` hook is useful as a building block for some customized hooks,
-that may need a reference to the component calling them.
+The `useStore` hook is the entry point for a component to connect to the store.
+See the [store documentation](store.md) for more information.
 
-### `useEnv`
+### `useDispatch`
 
-The `useEnv` hook is useful as a building block for some customized hooks,
-that may need a reference to the env of the component calling them.
+The `useDispatch` hook is the way for components to get a reference to the store
+`dispatch` function. See the [store documentation](store.md) for more information.
+
+### `useGetters`
+
+The `useGetters` hook is the way for components to get a reference to the store
+getters. See the [store documentation](store.md) for more information.
 
 ### Making customized hooks
 
@@ -436,11 +435,13 @@ not the solution to every problem.
 
   ```js
   function useRouter() {
-    const env = useEnv();
-    return env.router;
+    return Component.current.env.router;
   }
   ```
 
   This means that we give control to the application developer to create the
   router, which is good, so they can set it up, subclass it, ... And then, to
   test our components, we can just add a mock router in the environment.
+
+Note: the code above makes use of the `Component.current` property. This is the
+way hooks are able to get a reference to the component currently being created.

doc/reference/misc.md

@@ -43,7 +43,7 @@ workflow to help the user put in some data, which it could use later on.
 JavaScript:
 
 ```js
-const { Component, mount } = owl;
+const { Component } = owl;
 const { Portal } = owl.misc;
 
 class TeleportedComponent extends Component {}
@@ -51,7 +51,8 @@ class App extends Component {
   static components = { Portal, TeleportedComponent };
 }
 
-mount(App, { target: document.body });
+const app = new App();
+app.mount(document.body);
 ```
 
 XML:

doc/reference/mounting.md

@@ -1,60 +0,0 @@
-# 🦉 Mounting an application 🦉
-
-## Content
-
-- [Overview](#overview)
-- [API](#api)
-
-## Overview
-
-Mounting an Owl application is done by using the `mount` method (available in
-`owl.mount` if you are using the iife build, or it can be directly imported
-from `owl` if you are using a module system):
-
-```js
-const mount = { owl }; // if owl is available as an object
-
-const env = { ... };
-const app = await mount(MyComponent, { target: document.body, env });
-```
-
-Another example:
-
-```js
-const config = {
-  env: ...,
-  props: ...,
-  target: document.body,
-  position: "self",
-};
-const app = await mount(App, config);
-```
-
-A common way to initialize an application is to first setup an environment,
-then to call the `mount` method.
-
-## API
-
-Mount takes two parameters:
-
-- `C`, which should be a component class (NOT instance),
-- `params`, which is an object with the following keys:
-  - `target (HTMLElement | DocumentFragment)`: the target of the mount operation
-  - `env (optional, Env)` an environment
-  - `position (optional, "first-child" | "last-child" | "self")` the position
-    where it should be mounted (see below for more informations)
-  - `props (optional, any)`: some initial values that are given as props. Useful
-    when the root component is configurable, or when testing sub components
-
-Here are the various positions supported by Owl:
-
-- `first-child`: with this option, the component will be prepended inside the target,
-- `last-child` (default value): with this option, the component will be
-  appended in the target element,
-- `self`: the target will be used as the root element for the component. This
-  means that the target has to be an HTMLElement (and not a document fragment).
-  In this situation, it is possible that the component cannot be unmounted. For
-  example, if its target is `document.body`.
-
-The `mount` method returns a promise that resolves to the instance of the created
-component.

doc/reference/observer.md

@@ -15,7 +15,7 @@ use cases, there is no need to directly instantiate an observer.
 For example, this code will display `update` in the console:
 
 ```javascript
-const observer = new owl.core.Observer();
+const observer = new owl.Observer();
 observer.notifyCB = () => console.log("update");
 const obj = observer.observe({ a: { b: 1 } });
 
@@ -39,14 +39,14 @@ is incremented every time the value is observed. Sometimes, it can be useful
 to obtain that number:
 
 ```js
-const observer = new owl.core.Observer();
+const observer = new owl.Observer();
 const obj = observer.observe({ a: { b: 1 } });
 
-observer.revNumber(obj.a); // 1
+observer.deepRevNumber(obj.a); // 1
 obj.a.b = 2;
 
-observer.revNumber(obj.a); // 2
+observer.deepRevNumber(obj.a); // 2
 ```
 
-The `revNumber` can also return 0, which indicates that the value is not
+The `deepRevNumber` can also return 0, which indicates that the value is not
 observed.

doc/reference/props.md

@@ -18,7 +18,7 @@ class Child extends Component {
 }
 
 class Parent extends Component {
-  static template = xml`<div><Child a="state.a" b="'string'"/></div>`;
+  static template = xml`<div><ComponentA a="state.a" b="'string'"/></div>`;
   static components = { Child };
   state = useState({ a: "fromparent" });
 }

doc/reference/qweb_templating_language.md

@@ -13,8 +13,6 @@
   - [Setting Variables](#setting-variables)
   - [Conditionals](#conditionals)
   - [Dynamic Attributes](#dynamic-attributes)
-  - [Dynamic Class Attribute](#dynamic-class-attribute)
-  - [Dynamic Tag Names](#dynamic-tag-names)
   - [Loops](#loops)
   - [Rendering Sub Templates](#rendering-sub-templates)
   - [Dynamic Sub Templates](#dynamic-sub-templates)
@@ -78,7 +76,6 @@ needs. Here is a list of all Owl specific directives:
 | `t-transition`           | [Defining an animation](animations.md#css-transitions)                          |
 | `t-slot`                 | [Rendering a slot](slots.md)                                                    |
 | `t-model`                | [Form input bindings](component.md#form-input-bindings)                         |
-| `t-tag`                  | [Rendering nodes with dynamic tag name](#dynamic-tag-names)                     |
 
 ## Reference
 
@@ -327,40 +324,6 @@ values) or a pair `[key, value]`. For example:
 <div t-att="['a', 'b']"/> <!-- <div a="b"></div> -->
 ```
 
-### Dynamic class attribute
-
-For convenience, Owl supports a special case for the `t-att-class` case: one can
-use an object with keys describing the classes, and values boolean value denoting
-if the class is or is not present:
-
-```xml
-<div t-att-class="{'a': true, 'b': true}"/> <!-- result: <div class="a b"></div> -->
-
-<div t-att-class="{'a b': true, 'c': true}"/> <!-- result: <div class="a b c"></div> -->
-```
-
-Note that it can be combined with normal class attribute:
-
-```xml
-<div class="a" t-att-class="{'b': true}"/> <!-- result: <div class="a b"></div> -->
-```
-
-### Dynamic tag names
-
-When writing generic components or templates, the specific concrete tag for an
-HTML element is not known yet. In those situations, the `t-tag` directive is
-useful. It simply evaluates dynamically an expression to use as a tag name. The
-template:
-
-```xml
-<t t-tag="tag">
-    <span>content</span>
-</t>
-```
-
-will be rendered as `<div><span>content</span></div>` if the `tag` context key
-is set to `div`.
-
 ### Loops
 
 QWeb has an iteration directive `t-foreach` which take an expression returning the

doc/reference/router.md

@@ -0,0 +1,183 @@
+# 🦉 Router 🦉
+
+Remove?
+
+## Content
+
+- [Overview](#overview)
+- [Example](#example)
+- [Reference](#reference)
+  - [Route Definition](#route-definition)
+  - [Router](#router)
+  - [Navigation Guards](#navigation-guards)
+  - [RouteComponent](#routecomponent)
+  - [Link](#link)
+
+## Overview
+
+It is often useful to organize an application around urls. If the application is
+a single page application, then we need a way to manage those urls in the browser.
+This is why there are many different routers for different frameworks. A generic
+router can do the job just fine, but a specialized router for Owl can give a
+better developer experience.
+
+The Owl router support the following features:
+
+- `history` or `hash` mode
+- declarative routes
+- route redirection
+- navigation guards
+- parameterized routes
+- a `<Link/>` component
+- a `<RouteComponent/>` component
+
+Note that it is still in early stage of developments, and there are probably
+still some issues.
+
+## Example
+
+To use the Owl router, there are some steps that needs to be done:
+
+- declare some routes
+- create a router
+- add it to the environment
+
+```js
+async function protectRoute({ env, to }) {
+  if (!env.session.authUser) {
+    env.session.setNextRoute(to.name);
+    return { to: "SIGN_IN" };
+  }
+  return true;
+}
+
+export const ROUTES = [
+  { name: "LANDING", path: "/", component: Landing },
+  { name: "TASK", path: "/tasks/{{id}}", component: Task },
+  { name: "SIGN_UP", path: "/signup", component: SignUp },
+  { name: "SIGN_IN", path: "/signin", component: SignIn },
+  { name: "ADMIN", path: "/admin", component: Admin, beforeRouteEnter: protectRoute },
+  { name: "ACCOUNT", path: "/account", component: Account, beforeRouteEnter: protectRoute },
+  { name: "UNKNOWN", path: "*", redirect: { to: "LANDING" } }
+];
+
+function makeEnvironment() {
+    ...
+    const env = { qweb };
+    env.session = new Session(env);
+    env.router = new owl.router.Router(env, ROUTES);
+    await env.router.start();
+    return env;
+}
+
+App.env = makeEnvironment();
+// create root component here
+```
+
+Notice that the router needs to be started. This is an asynchronous operation
+because it needs to apply the potential navigation guards on the current route
+(which may or may not mean that the application is redirected to another route).
+
+## Reference
+
+### Route definition
+
+A route need to be defined as an object with the following keys:
+
+- `name` (optional): a (unique) string useful to identify the current route. If not
+  given, it will be assigned an automatic name,
+- `path`: a string describing the url. It can be static: `/admin` or dynamic: `/users/{{id}}`.
+  It also can be `*`, to catch all remaining routes.
+- `component` (optional): an Owl component that will be used by the `t-routecomponent`
+  directive if the route is active
+- `redirect` (optional): should be destination object (with optional keys `path`, `to` and `params`) if given, the application will be redirected to the destination whenever we match this route
+- `beforeRouteEnter`: defines a [navigation guard](#navigation-guards).
+
+### `Router`
+
+The `Router` constructor takes three arguments:
+
+- `env`: a valid environment,
+- a list of routes,
+- an optional object (with the only key `mode` which can be `history` (default
+  value) or `hash`).
+
+`history` will use the browser [History API](https://developer.mozilla.org/en-US/docs/Web/API/History_API) as the mechanism to manage URL.\
+Example: `https://yourdomain.tld/my_custom_route`.\
+For this mechanism to work, you need a way to configure your web server accordingly.
+
+`hash` will manipulate the hash of the URL.\
+Example: `https://yourdomain.tld/index.html#/my_custom_route`.
+
+```js
+const ROUTES = [...];
+const router = new owl.router.Router(env, ROUTES, {mode: 'history'});
+```
+
+Note that the route are defined in a list, and the order matters: the router
+tries to find a match by going down the list.
+
+The router needs to be added to the environment in the `router` sub key.
+
+Once a router is created, it needs to be started. This is necessary to initialize
+its current state to the current URL (and also, to potentially apply any
+navigation guards and/or redirecting).
+
+```js
+await router.start();
+```
+
+Once started, the router will keep track of the current url and reflect its
+value in two keys:
+
+- `router.currentRoute`
+- `router.currentParams`
+
+The router also has a `navigate` method, useful to programmatically change the
+application to another state (and the url):
+
+```js
+router.navigate({ to: "USER", params: { id: 51 } });
+```
+
+### Navigation Guards
+
+Navigation guards are very useful to be able to execute some business logic/
+perform some actions or redirect to other routes whenever the application is
+entering a new route. For example, the following guard checks if there is an
+authenticated user, and if it is not the case, redirect to the sign in route.
+
+```js
+async function protectRoute({ env, to }) {
+  if (!env.session.authUser) {
+    env.session.setNextRoute(to.name);
+    return { to: "SIGN_IN" };
+  }
+  return true;
+}
+```
+
+A navigation guard is a function that returns a promise, which either resolves
+to `true` (the navigation is accepted), or to another destination object.
+
+### `RouteComponent`
+
+The `RouteComponent` component directs Owl to render the component associated
+to the currently active route (if any):
+
+```xml
+<div t-name="App">
+    <NavBar />
+    <RouteComponent />
+</div>
+```
+
+### `Link`
+
+The `Link` component is a Owl component which render as a `<a>` tag with any
+content. It will compute the proper href from its props, and allow Owl to
+properly navigate to a given url if clicked on it.
+
+```xml
+<Link to="'HOME'">Home</Link>
+```

doc/reference/slots.md

@@ -25,8 +25,6 @@ some sub template, but still be the owner. For example, a generic dialog compone
 will need to render some content, some footer, but with the parent as the
 rendering context.
 
-Slots are inserted with the `t-slot` directive:
-
 ```xml
 <div t-name="Dialog" class="modal">
   <div class="modal-title"><t t-esc="props.title"/></div>
@@ -44,7 +42,7 @@ Slots are defined by the caller, with the `t-set-slot` directive:
 ```xml
 <div t-name="SomeComponent">
   <div>some component</div>
-  <Dialog title="'Some Dialog'">
+  <Dialog title="Some Dialog">
     <t t-set-slot="content">
       <div>hey</div>
     </t>
@@ -64,9 +62,7 @@ This is deprecated and should no longer be used in new code.
 
 ## Reference
 
-### Default Slot
-
-The first element inside the component which is not a named slot will
+Default slot: the first element inside the component which is not a named slot will
 be considered the `default` slot. For example:
 
 ```xml
@@ -81,9 +77,7 @@ be considered the `default` slot. For example:
 </div>
 ```
 
-### Default content
-
-Slots can define a default content, in case the parent did not define them:
+Default content: slots can define a default content, in case the parent did not define them:
 
 ```xml
 <div t-name="Parent">
@@ -100,12 +94,3 @@ Rendering context: the content of the slots is actually rendered with the
 rendering context corresponding to where it was defined, not where it is
 positioned. This allows the user to define event handlers that will be bound
 to the correct component (usually, the grandparent of the slot content).
-
-### Dynamic Slots
-
-The `t-slot` directive is actually able to use any expressions, using string
-interplolation:
-
-```xml
- <t t-slot="{{current}}" />
-```

doc/reference/store.md

@@ -0,0 +1,349 @@
+# 🦉 Store 🦉
+
+## Content
+
+- [Overview](#overview)
+- [Example](#example)
+- [Reference](#reference)
+  - [Store](#store)
+  - [Actions](#actions)
+  - [Getters](#getters)
+  - [Connecting a Component](#connecting-a-component)
+  - [`useStore`](#usestore)
+  - [`useDispatch`](#usedispatch)
+  - [`useGetters`](#usegetters)
+  - [Semantics](#semantics)
+  - [Good Practices](#good-practices)
+
+## Overview
+
+Managing the state in an application is not an easy task. In some cases, the
+state of an application can be part of the component tree, in a natural way.
+However, there are situations where some parts of the state need to be displayed
+in various parts of the user interface, and then, it is not obvious which
+component should own which part of the state.
+
+Owl's solution to this issue is a centralized store. It is a class that owns
+some (or all) state, and lets the developer update it in a structured way, with
+`actions`. Owl components can then connect to the store to read their relevant
+state, and they will be rerendered if the state is updated.
+
+Note: Owl store is inspired by React Redux and VueX.
+
+## Example
+
+Here is what a simple store looks like:
+
+```js
+const actions = {
+  addTodo({ state }, message) {
+    state.todos.push({
+      id: state.nextId++,
+      message,
+      isCompleted: false,
+    });
+  },
+};
+
+const state = {
+  todos: [],
+  nextId: 1,
+};
+
+const store = new owl.Store({ state, actions });
+store.on("update", null, () => console.log(store.state));
+
+// updating the state
+store.dispatch("addTodo", "fix all bugs");
+```
+
+This example shows how a store can be defined and used. Note that in most cases,
+actions will be dispatched by connected components.
+
+## Reference
+
+### `Store`
+
+The store is a simple [`owl.EventBus`](event_bus.md) that triggers `update` events
+whenever its state is changed. Note that these events are triggered only after a
+microtask tick, so only one event will be triggered for any number of state changes in a
+call stack.
+
+Also, it is important to mention that the state is observed (with an `owl.Observer`),
+which is the reason why it is able to know if it was changed. See the
+[Observer](observer.md)'s documentation for more details.
+
+The `Store` class is quite small. It has two public methods:
+
+- its constructor
+- `dispatch`
+
+The constructor takes a configuration object with four (optional) keys:
+
+- the initial state
+- the actions
+- the getters
+- the environment
+
+```javascript
+const config = {
+  state,
+  actions,
+  getters,
+  env,
+};
+const store = new Store(config);
+```
+
+### Actions
+
+Actions are used to coordinate state changes. It can be used for both synchronous
+and asynchronous logic.
+
+```js
+const actions = {
+  async login({ state }, info) {
+    state.loginState = "pending";
+    try {
+      const loginInfo = await doSomeRPC("/login/", info);
+      state.loginState = loginInfo;
+    } catch (e) {
+      state.loginState = "error";
+    }
+  },
+};
+```
+
+The first argument to an action method is an object with four keys:
+
+- `state`: the current state of the store content,
+- `dispatch`: a function that can be used to dispatch other actions,
+- `getters`: an object containing all getters defined in the store,
+- `env`: the current environment. This is useful sometimes, in particular if
+  an action needs to apply some side effects (such as performing an rpc), and
+  the `rpc` method is located in the environment.
+
+Actions are called with the `dispatch` method on the store, and can receive an
+arbitrary number of arguments.
+
+```js
+store.dispatch("login", someInfo);
+```
+
+Note that anything returned by an action will also be returned by the `dispatch`
+call.
+
+Also, it is important to be aware that we need to be careful with asynchronous
+logic. Each state change will potentially trigger a rerendering, so we need to
+make sure that we do not have a partially corrupted state. Here is an example that
+is likely not a good idea:
+
+```javascript
+const actions = {
+  async fetchSomeData({ state }, recordId) {
+    state.recordId = recordId;
+    const data = await doSomeRPC("/read/", recordId);
+    state.recordData = data;
+  },
+};
+```
+
+In the previous example, there is a period of time in which the state has a
+`recordId` which does not correspond to the `recordData`. It is more likely that
+we want an atomic update: updating the `recordId` at the same time as the `recordData`
+values:
+
+```javascript
+const actions = {
+  async fetchSomeData({ state }, recordId) {
+    const data = await doSomeRPC("/read/", recordId);
+    state.recordId = recordId;
+    state.recordData = data;
+  },
+};
+```
+
+### Getters
+
+Usually, data contained in the store will be stored in a normalized way. For
+example,
+
+```js
+{
+    posts: [{id: 11, authorId: 4, content: 'Greetings'}],
+    authors: [{id: 4, name: 'John'}]
+}
+```
+
+However, the user interface will probably need some denormalized data like
+
+```js
+{id: 11, author: {id: 4, name: 'John'}, content: 'Greetings'}
+```
+
+This is what `getters` are for: they give a centralized way to process and
+transform the data contained in the store.
+
+```js
+const getters = {
+  getPost({ state }, id) {
+    const post = state.posts.find((p) => p.id === id);
+    const author = state.authors.find((a) => a.id === post.id);
+    return {
+      id,
+      author,
+      content: post.content,
+    };
+  },
+};
+
+// somewhere else
+const post = store.getters.getPost(id);
+```
+
+Getters take _at most_ one argument.
+
+Note that getters are not cached.
+
+### Connecting a Component
+
+At some point, we need a way to interact with the store from a component. This
+means that the component needs a reference to the store. By default, it looks
+for it in the `env.store` key. However, this can be configured with the `useStore`
+hook.
+
+Every component-store interactions are done with the help of the three store hooks:
+
+- [`useStore`](#usestore) to subscribe a component to some part of the store state,
+- [`useDispatch`](#usedispatch) to get a reference to a dispatch function,
+- [`useGetters`](#usegetters) to get a reference to the getters defined in the store.
+
+Assume we have this store:
+
+```javascript
+const actions = {
+  increment({ state }, val) {
+    state.counter.value += val;
+  },
+};
+
+const state = {
+  counter: { value: 0 },
+};
+const store = new owl.Store({ state, actions });
+```
+
+To make it accessible to the complete application, we will put it in the
+environment:
+
+```js
+// in this example, the root component is App
+App.env.store = store;
+```
+
+A counter component can then select this value and dispatch an action like this:
+
+```js
+class Counter extends Component {
+  counter = useStore((state) => state.counter);
+  dispatch = useDispatch();
+}
+
+const counter = new Counter({ store, qweb });
+```
+
+```xml
+<button t-name="Counter" t-on-click="dispatch('increment')">
+  Click Me! [<t t-esc="counter.value"/>]
+</button>
+```
+
+### `useStore`
+
+The `useStore` hook is used to select some part of the store state. It accepts
+two arguments:
+
+- a selector function, which takes the store state as first argument (and the
+  component props as second argument) and which must return the part of the
+  store state that will be made available and observed for changes,
+- optionally, an object which can have the following optional keys:
+  - a `store` key containing a store object if we want to use another store than
+    the default store,
+  - an `isEqual` key containing an equality function if we want to specialize
+    the comparison (the function must accept two arguments: the previous result
+    and the new result, and must return whether they are equal),
+  - and an `onUpdate` key containing an update function if we want to execute an
+    arbitrary code every time the selected state changes (the function will
+    receive one argument, the new result, and can execute arbitrary code).
+
+If the `useStore` selector returns a sub part of the store state, the component
+will only be rerendered whenever this part of the state changes. Otherwise, it
+will perform a strict equality check (unless the `isEqual` option is defined,
+then it will call it) and will update the component every time this check fails.
+
+Note that if the selector function returns a primitive type, the result of
+`useStore` will be immutable and it will not react to changes. In this case, it
+is important to define the `onUpdate` option to properly update the value
+manually when it changes.
+
+Also, the return value from `useStore` is not supposed to be modified. The store
+state should only be updated with actions.
+
+### `useDispatch`
+
+The `useDispatch` hook is useful when a component needs to be able to dispatch
+actions. It takes an optional argument, which is a store. If not given, it will
+use the store in the environment.
+
+Note that a component does not need to be connected in any other way to the store.
+For example:
+
+```js
+class DoSomethingButton extends Component {
+  static template = xml`<button t-on-click="dispatch('something')">Click</button>`;
+  dispatch = useDispatch();
+}
+```
+
+### `useGetters`
+
+The `useGetters` hook is useful when a component needs to be able to use the
+getters defined in a store. It takes an optional argument, which is a store. If
+not given, it will use the store in the environment.
+
+Note that a component does not need to be connected in any other way to the store.
+For example:
+
+```js
+class InfoButton extends Component {
+  static template = xml`<span><t t-esc="getters.somevalue()"></span>`;
+  getters = useGetters();
+}
+```
+
+### Semantics
+
+The `Store` class and the `useStore` hook try to be smart and to optimize as much
+as possible the rendering and update process. What is important to know is:
+
+- components are always updated in the order of their creation (so, parent
+  before children),
+- they are updated only if they are in the DOM,
+- if a parent is asynchronous, the system will wait for it to complete its
+  update before updating other components,
+- in general, updates are not coordinated. This is not a problem for synchronous
+  components, but if there are many asynchronous components, this could lead to
+  a situation where some part of the UI is updated and some other part of the UI is
+  not updated.
+
+### Good Practices
+
+- avoid asynchronous components as much as possible. Asynchronous components
+  lead to situations where parts of the UI is not updated immediately,
+- do not be afraid to connect many components, parent or children if needed. For
+  example, a `MessageList` component could get a list of ids in its `useStore`
+  call and a `Message` component could get the data of its own
+  message,
+- since the `useStore` function is called for each connected component,
+  for each state update, it is important to make sure that these functions are
+  as fast as possible.

doc/reference/tags.md

@@ -62,14 +62,14 @@ The CSS tag is useful to define a css stylesheet in the javascript file:
 
 ```js
 class MyComponent extends Component {
-  static template = xml`
+    static template = xml`
         <div class="my-component">some template</div>
     `;
-  static style = css`
-    .my-component {
-      color: red;
-    }
-  `;
+    static css`
+      .my-component {
+          color: red;
+      }
+    `;
 }
 ```
 

doc/reference/utils.md

@@ -21,8 +21,8 @@ argument, it executes it as soon as the DOM ready (or directly).
 ```js
 Promise.all([loadFile("templates.xml"), owl.utils.whenReady()]).then(function ([templates]) {
   const qweb = new owl.QWeb({ templates });
-  const env = { qweb };
-  await mount(App, { env, target: document.body });
+  const app = new App({ qweb });
+  app.mount(document.body);
 });
 ```
 
@@ -31,8 +31,8 @@ or alternatively:
 ```js
 owl.utils.whenReady(function () {
   const qweb = new owl.QWeb();
-  const env = { qweb };
-  await mount(App, { env, target: document.body });
+  const app = new App({ qweb });
+  app.mount(document.body);
 });
 ```
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@odoo/owl",
-  "version": "2.0.0-alpha1",
+  "version": "1.0.13",
   "description": "Odoo Web Library (OWL)",
   "main": "dist/owl.cjs.js",
   "browser": "dist/owl.iife.js",
@@ -10,20 +10,18 @@
     "dist"
   ],
   "engines": {
-    "node": ">=12.18.3"
+    "node": ">=10.15.3"
   },
   "scripts": {
     "build:bundle": "rollup -c",
     "build": "npm run build:bundle",
     "test": "jest",
-    "test:debug": "node --inspect-brk node_modules/.bin/jest --runInBand --watch",
     "test:watch": "jest --watch",
-    "playground:serve": "python3 tools/server.py || python tools/server.py",
-    "playground": "npm run build && npm run playground:serve",
-    "preplayground:watch": "npm run build",
-    "playground:watch": "npm-run-all  --parallel playground:serve \"build:* -- --watch\"",
+    "tools:serve": "python3 tools/server.py || python tools/server.py",
+    "tools": "npm run build && npm run tools:serve",
+    "pretools:watch": "npm run build",
+    "tools:watch": "npm-run-all  --parallel tools:serve \"build:* -- --watch\"",
     "prettier": "prettier {src/*.ts,src/**/*.ts,tests/*.ts,tests/**/*.ts,doc/*.md,doc/**/*.md} --write",
-    "check-formatting": "prettier {src/*.ts,src/**/*.ts,tests/*.ts,tests/**/*.ts,doc/*.md,doc/**/*.md} --check",
     "publish": "npm run build && npm publish",
     "release": "node tools/release.js"
   },
@@ -42,22 +40,20 @@
     "@types/node": "^14.11.8",
     "chalk": "^3.0.0",
     "cpx": "^1.5.0",
-    "current-git-branch": "^1.1.0",
     "git-rev-sync": "^1.12.0",
     "github-api": "^3.3.0",
     "jest": "^27.1.0",
-    "jest-diff": "^27.3.1",
     "jest-environment-jsdom": "^27.1.0",
     "live-server": "^1.2.1",
     "npm-run-all": "^4.1.5",
-    "prettier": "2.4.1",
+    "prettier": "^2.0.4",
     "rollup": "^2.56.3",
     "rollup-plugin-terser": "^7.0.2",
-    "rollup-plugin-typescript2": "^0.31.1",
+    "rollup-plugin-typescript2": "^0.30.0",
     "sass": "^1.16.1",
     "source-map-support": "^0.5.10",
     "ts-jest": "^27.0.5",
-    "typescript": "4.5.2",
+    "typescript": "3.9.6",
     "uglify-es": "^3.3.9"
   },
   "jest": {
@@ -66,9 +62,7 @@
       "<rootDir>/src",
       "<rootDir>/tests"
     ],
-    "setupFiles": [
-      "./tests/mocks/mockEventTarget.js"
-    ],
+    "setupFiles": ["./tests/mocks/mockEventTarget.js"],
     "transform": {
       "^.+\\.ts?$": "ts-jest"
     },

roadmap.md

@@ -1,6 +1,6 @@
 # 🦉 OWL Roadmap 🦉
 
-- Current version: 1.4.7
+- Current version: 1.0.13
 - Status: stable
 
 This roadmap is only an attempt at predicting Owl's future.  Everything may

src/app.ts

@@ -0,0 +1,45 @@
+import { Component } from "./component/component";
+import { ComponentNode } from "./component/component_node";
+import { Scheduler } from "./component/scheduler";
+import { TemplateSet } from "./qweb/template_helpers";
+
+// reimplement dev mode stuff see last change in 0f7a8289a6fb8387c3c1af41c6664b2a8448758f
+
+export class App<T extends typeof Component = any> extends TemplateSet {
+  Root: T;
+  props: any;
+  env: any = {};
+  scheduler = new Scheduler(window.requestAnimationFrame.bind(window));
+  root: ComponentNode | null = null;
+  dev: boolean = true;
+
+  constructor(Root: T, props?: any) {
+    super();
+    this.Root = Root;
+    this.props = props;
+  }
+
+  configure(params: any) {
+    if (params.env) {
+      this.env = params.env;
+    }
+  }
+
+  mount(target: HTMLElement): Promise<InstanceType<T>> {
+    if (!(target instanceof HTMLElement)) {
+      throw new Error("Cannot mount component: the target is not a valid DOM element");
+    }
+    if (!document.body.contains(target)) {
+      throw new Error("Cannot mount a component on a detached dom node");
+    }
+    const node = new ComponentNode(this.Root, this.props, this);
+    this.root = node;
+    return node.mountComponent(target);
+  }
+
+  destroy() {
+    if (this.root) {
+      this.root.destroy();
+    }
+  }
+}

src/app/app.ts

@@ -1,105 +0,0 @@
-import { Component } from "../component/component";
-import { ComponentNode } from "../component/component_node";
-import { MountOptions } from "../component/fibers";
-import { Scheduler } from "../component/scheduler";
-import { TemplateSet, TemplateSetConfig } from "./template_set";
-import { nodeErrorHandlers } from "../component/error_handling";
-
-// reimplement dev mode stuff see last change in 0f7a8289a6fb8387c3c1af41c6664b2a8448758f
-
-export interface Env {
-  [key: string]: any;
-}
-
-export interface AppConfig extends TemplateSetConfig {
-  env?: Env;
-  props?: any;
-}
-
-export const DEV_MSG = `Owl is running in 'dev' mode.
-
-This is not suitable for production use.
-See https://github.com/odoo/owl/blob/master/doc/reference/config.md#mode for more information.`;
-
-export class App<T extends typeof Component = any> extends TemplateSet {
-  Root: T;
-  props: any;
-  env: Env;
-  scheduler = new Scheduler(window.requestAnimationFrame.bind(window));
-  root: ComponentNode | null = null;
-
-  constructor(Root: T, config: AppConfig = {}) {
-    super(config);
-    this.Root = Root;
-    if (config.dev) {
-      console.info(DEV_MSG);
-    }
-    const descrs = Object.getOwnPropertyDescriptors(config.env || {});
-    this.env = Object.freeze(Object.defineProperties({}, descrs));
-    this.props = config.props || {};
-  }
-
-  mount(target: HTMLElement, options?: MountOptions): Promise<InstanceType<T>> {
-    this.checkTarget(target);
-    const node = this.makeNode(this.Root, this.props);
-    const prom = this.mountNode(node, target, options);
-    this.root = node;
-    return prom;
-  }
-
-  checkTarget(target: HTMLElement) {
-    if (!(target instanceof HTMLElement)) {
-      throw new Error("Cannot mount component: the target is not a valid DOM element");
-    }
-    if (!document.body.contains(target)) {
-      throw new Error("Cannot mount a component on a detached dom node");
-    }
-  }
-
-  makeNode(Component: T, props: any): ComponentNode {
-    return new ComponentNode(Component, props, this);
-  }
-
-  mountNode(node: ComponentNode, target: HTMLElement, options?: MountOptions) {
-    const promise: any = new Promise((resolve, reject) => {
-      let isResolved = false;
-      // manually set a onMounted callback.
-      // that way, we are independant from the current node.
-      node.mounted.push(() => {
-        resolve(node.component);
-        isResolved = true;
-      });
-
-      // Manually add the last resort error handler on the node
-      let handlers = nodeErrorHandlers.get(node);
-      if (!handlers) {
-        handlers = [];
-        nodeErrorHandlers.set(node, handlers);
-      }
-      handlers.unshift((e) => {
-        if (isResolved) {
-          console.error(e);
-        } else {
-          reject(e);
-        }
-        throw e;
-      });
-    });
-    node.mountComponent(target, options);
-    return promise;
-  }
-
-  destroy() {
-    if (this.root) {
-      this.root.destroy();
-    }
-  }
-}
-
-export async function mount<T extends typeof Component>(
-  C: T,
-  target: HTMLElement,
-  config: AppConfig & MountOptions = {}
-): Promise<InstanceType<T>> {
-  return new App(C, config).mount(target, config);
-}

src/app/template_helpers.ts

@@ -1,200 +0,0 @@
-import { BDom, multi, text, toggler } from "../blockdom";
-import { validateProps } from "../component/props_validation";
-import { Markup } from "../utils";
-import { html } from "../blockdom/index";
-
-/**
- * This file contains utility functions that will be injected in each template,
- * to perform various useful tasks in the compiled code.
- */
-
-function withDefault(value: any, defaultValue: any): any {
-  return value === undefined || value === null || value === false ? defaultValue : value;
-}
-
-function callSlot(
-  ctx: any,
-  parent: any,
-  key: string,
-  name: string,
-  dynamic: boolean,
-  extra: any,
-  defaultContent?: (ctx: any, node: any, key: string) => BDom
-): BDom {
-  const slots = (ctx.props && ctx.props.slots) || {};
-  const { __render, __ctx, __scope } = slots[name] || {};
-  const slotScope = Object.create(__ctx || {});
-  if (__scope) {
-    slotScope[__scope] = extra || {};
-  }
-  const slotBDom = __render ? __render.call(__ctx.__owl__.component, slotScope, parent, key) : null;
-  if (defaultContent) {
-    let child1: BDom | undefined = undefined;
-    let child2: BDom | undefined = undefined;
-    if (slotBDom) {
-      child1 = dynamic ? toggler(name, slotBDom) : slotBDom;
-    } else {
-      child2 = defaultContent.call(ctx.__owl__.component, ctx, parent, key);
-    }
-    return multi([child1, child2]);
-  }
-  return slotBDom || text("");
-}
-
-function capture(ctx: any): any {
-  const component = ctx.__owl__.component;
-  const result = Object.create(component);
-  for (let k in ctx) {
-    result[k] = ctx[k];
-  }
-  return result;
-}
-
-function withKey(elem: any, k: string) {
-  elem.key = k;
-  return elem;
-}
-
-function prepareList(collection: any): [any[], any[], number, any[]] {
-  let keys: any[];
-  let values: any[];
-
-  if (Array.isArray(collection)) {
-    keys = collection;
-    values = collection;
-  } else if (collection) {
-    values = Object.keys(collection);
-    keys = Object.values(collection);
-  } else {
-    throw new Error("Invalid loop expression");
-  }
-  const n = values.length;
-  return [keys, values, n, new Array(n)];
-}
-
-const isBoundary = Symbol("isBoundary");
-
-function setContextValue(ctx: { [key: string]: any }, key: string, value: any): void {
-  const ctx0 = ctx;
-  while (!ctx.hasOwnProperty(key) && !ctx.hasOwnProperty(isBoundary)) {
-    const newCtx = ctx.__proto__;
-    if (!newCtx) {
-      ctx = ctx0;
-      break;
-    }
-    ctx = newCtx;
-  }
-  ctx[key] = value;
-}
-
-function toNumber(val: string): number | string {
-  const n = parseFloat(val);
-  return isNaN(n) ? val : n;
-}
-
-function shallowEqual(l1: any[], l2: any[]): boolean {
-  for (let i = 0, l = l1.length; i < l; i++) {
-    if (l1[i] !== l2[i]) {
-      return false;
-    }
-  }
-  return true;
-}
-
-class LazyValue {
-  fn: any;
-  ctx: any;
-  node: any;
-  constructor(fn: any, ctx: any, node: any) {
-    this.fn = fn;
-    this.ctx = capture(ctx);
-    this.node = node;
-  }
-
-  evaluate(): any {
-    return this.fn(this.ctx, this.node);
-  }
-
-  toString() {
-    return this.evaluate().toString();
-  }
-}
-
-/*
- * Safely outputs `value` as a block depending on the nature of `value`
- */
-export function safeOutput(value: any): ReturnType<typeof toggler> {
-  if (!value) {
-    return value;
-  }
-  let safeKey;
-  let block;
-  if (value instanceof Markup) {
-    safeKey = `string_safe`;
-    block = html(value as string);
-  } else if (value instanceof LazyValue) {
-    safeKey = `lazy_value`;
-    block = value.evaluate();
-  } else if (typeof value === "string") {
-    safeKey = "string_unsafe";
-    block = text(value);
-  } else {
-    // Assuming it is a block
-    safeKey = "block_safe";
-    block = value;
-  }
-  return toggler(safeKey, block);
-}
-
-let boundFunctions = new WeakMap();
-
-function bind(ctx: any, fn: Function): Function {
-  let component = ctx.__owl__.component;
-  let boundFnMap = boundFunctions.get(component);
-  if (!boundFnMap) {
-    boundFnMap = new WeakMap();
-    boundFunctions.set(component, boundFnMap);
-  }
-  let boundFn = boundFnMap.get(fn);
-  if (!boundFn) {
-    boundFn = fn.bind(component);
-    boundFnMap.set(fn, boundFn);
-  }
-  return boundFn;
-}
-
-type RefMap = { [key: string]: HTMLElement | null };
-type RefSetter = (el: HTMLElement | null) => void;
-
-function multiRefSetter(refs: RefMap, name: string): RefSetter {
-  let count = 0;
-  return (el) => {
-    if (el) {
-      count++;
-      if (count > 1) {
-        throw new Error("Cannot have 2 elements with same ref name at the same time");
-      }
-    }
-    if (count === 0 || el) {
-      refs[name] = el;
-    }
-  };
-}
-
-export const UTILS = {
-  withDefault,
-  zero: Symbol("zero"),
-  isBoundary,
-  callSlot,
-  capture,
-  withKey,
-  prepareList,
-  setContextValue,
-  multiRefSetter,
-  shallowEqual,
-  toNumber,
-  validateProps,
-  LazyValue,
-  safeOutput,
-  bind,
-};

src/app/template_set.ts

@@ -1,126 +0,0 @@
-import { createBlock, html, list, multi, text, toggler, comment } from "../blockdom";
-import { compile, Template } from "../compiler";
-import { component } from "../component/component_node";
-import { UTILS } from "./template_helpers";
-
-const bdom = { text, createBlock, list, multi, html, toggler, component, comment };
-
-export const globalTemplates: { [key: string]: string | Node } = {};
-
-function parseXML(xml: string): Document {
-  const parser = new DOMParser();
-
-  const doc = parser.parseFromString(xml, "text/xml");
-  if (doc.getElementsByTagName("parsererror").length) {
-    let msg = "Invalid XML in template.";
-    const parsererrorText = doc.getElementsByTagName("parsererror")[0].textContent;
-    if (parsererrorText) {
-      msg += "\nThe parser has produced the following error message:\n" + parsererrorText;
-      const re = /\d+/g;
-      const firstMatch = re.exec(parsererrorText);
-      if (firstMatch) {
-        const lineNumber = Number(firstMatch[0]);
-        const line = xml.split("\n")[lineNumber - 1];
-        const secondMatch = re.exec(parsererrorText);
-        if (line && secondMatch) {
-          const columnIndex = Number(secondMatch[0]) - 1;
-          if (line[columnIndex]) {
-            msg +=
-              `\nThe error might be located at xml line ${lineNumber} column ${columnIndex}\n` +
-              `${line}\n${"-".repeat(columnIndex - 1)}^`;
-          }
-        }
-      }
-    }
-    throw new Error(msg);
-  }
-  return doc;
-}
-
-export interface TemplateSetConfig {
-  dev?: boolean;
-  translatableAttributes?: string[];
-  translateFn?: (s: string) => string;
-  templates?: string | Document;
-}
-
-export class TemplateSet {
-  dev: boolean;
-  rawTemplates: typeof globalTemplates = Object.create(globalTemplates);
-  templates: { [name: string]: Template } = {};
-  translateFn?: (s: string) => string;
-  translatableAttributes?: string[];
-  utils: typeof UTILS = Object.assign({}, UTILS, {
-    call: (owner: any, subTemplate: string, ctx: any, parent: any, key: any) => {
-      const template = this.getTemplate(subTemplate);
-      return toggler(subTemplate, template.call(owner, ctx, parent, key));
-    },
-    getTemplate: (name: string) => this.getTemplate(name),
-  });
-
-  constructor(config: TemplateSetConfig = {}) {
-    this.dev = config.dev || false;
-    this.translateFn = config.translateFn;
-    this.translatableAttributes = config.translatableAttributes;
-    if (config.templates) {
-      this.addTemplates(config.templates);
-    }
-  }
-
-  addTemplate(name: string, template: string | Node, options: { allowDuplicate?: boolean } = {}) {
-    if (name in this.rawTemplates && !options.allowDuplicate) {
-      throw new Error(`Template ${name} already defined`);
-    }
-    this.rawTemplates[name] = template;
-  }
-
-  addTemplates(xml: string | Document, options: { allowDuplicate?: boolean } = {}) {
-    if (!xml) {
-      // empty string
-      return;
-    }
-    xml = xml instanceof Document ? xml : parseXML(xml);
-    for (const template of xml.querySelectorAll("[t-name]")) {
-      const name = template.getAttribute("t-name")!;
-      template.removeAttribute("t-name");
-      this.addTemplate(name, template, options);
-    }
-  }
-
-  getTemplate(name: string): Template {
-    if (!(name in this.templates)) {
-      const rawTemplate = this.rawTemplates[name];
-      if (rawTemplate === undefined) {
-        throw new Error(`Missing template: "${name}"`);
-      }
-      const templateFn = this._compileTemplate(name, rawTemplate);
-      // first add a function to lazily get the template, in case there is a
-      // recursive call to the template name
-      this.templates[name] = (context, parent) => this.templates[name](context, parent);
-      const template = templateFn(bdom, this.utils);
-      this.templates[name] = template;
-    }
-    return this.templates[name];
-  }
-
-  _compileTemplate(name: string, template: string | Node) {
-    return compile(template, {
-      name,
-      dev: this.dev,
-      translateFn: this.translateFn,
-      translatableAttributes: this.translatableAttributes,
-    });
-  }
-}
-
-// -----------------------------------------------------------------------------
-//  xml tag helper
-// -----------------------------------------------------------------------------
-export function xml(...args: Parameters<typeof String.raw>) {
-  const name = `__template__${xml.nextId++}`;
-  const value = String.raw(...args);
-  globalTemplates[name] = value;
-  return name;
-}
-
-xml.nextId = 1;

src/blockdom/attributes.ts

@@ -1,6 +1,6 @@
 import type { Setter } from "./block_compiler";
 
-const { setAttribute: elemSetAttribute, removeAttribute } = Element.prototype;
+const { setAttribute, removeAttribute } = Element.prototype;
 const tokenList = DOMTokenList.prototype;
 const tokenListAdd = tokenList.add;
 const tokenListRemove = tokenList.remove;
@@ -14,23 +14,11 @@ const wordRegexp = /\s+/;
  * file.
  */
 
-function setAttribute(this: HTMLElement, key: string, value: any) {
-  switch (value) {
-    case false:
-    case undefined:
-      removeAttribute.call(this, key);
-      break;
-    case true:
-      elemSetAttribute.call(this, key, "");
-      break;
-    default:
-      elemSetAttribute.call(this, key, value);
-  }
-}
-
 export function createAttrUpdater(attr: string): Setter<HTMLElement> {
   return function (this: HTMLElement, value: any) {
-    setAttribute.call(this, attr, value);
+    if (value !== false) {
+      setAttribute.call(this, attr, value === true ? "" : value);
+    }
   };
 }
 
@@ -156,10 +144,10 @@ export function isProp(tag: string, key: string): boolean {
     case "option":
       return key === "selected" || key === "disabled";
     case "textarea":
-      return key === "value" || key === "readonly" || key === "disabled";
-    case "select":
-      return key === "value" || key === "disabled";
+      return key === "readonly" || key === "disabled";
+      break;
     case "button":
+    case "select":
     case "optgroup":
       return key === "disabled";
   }

src/blockdom/block_compiler.ts

@@ -113,10 +113,9 @@ interface IntermediateTree {
   nextSibling: IntermediateTree | null;
   el: Node;
   info: DynamicInfo[];
-  isRef?: boolean;
+  forceRef?: boolean;
   refIdx?: number;
   refN: number;
-  currentNS: string | null;
 }
 
 function buildTree(
@@ -125,9 +124,9 @@ function buildTree(
   domParentTree: IntermediateTree | null = null
 ): IntermediateTree {
   switch (node.nodeType) {
-    case Node.ELEMENT_NODE: {
+    case 1: {
       // HTMLElement
-      let currentNS = domParentTree && domParentTree.currentNS;
+      let isActive = false;
       const tagName = (node as Element).tagName;
       let el: Node | undefined = undefined;
       const info: DynamicInfo[] = [];
@@ -135,31 +134,25 @@ function buildTree(
         const index = parseInt(tagName.slice(11), 10);
         info.push({ type: "text", idx: index });
         el = document.createTextNode("");
+        isActive = true;
       }
       if (tagName.startsWith("block-child-")) {
-        if (!domParentTree!.isRef) {
-          addRef(domParentTree!);
-        }
+        domParentTree!.forceRef = true;
         const index = parseInt(tagName.slice(12), 10);
         info.push({ type: "child", idx: index });
         el = document.createTextNode("");
-      }
-      const attrs = (node as Element).attributes;
-      const ns = attrs.getNamedItem("block-ns");
-      if (ns) {
-        attrs.removeNamedItem("block-ns");
-        currentNS = ns.value;
+        isActive = true;
       }
       if (!el) {
-        el = currentNS
-          ? document.createElementNS(currentNS, tagName)
-          : document.createElement(tagName);
+        el = document.createElement(tagName);
       }
-      if (el instanceof Element) {
+      if (el instanceof HTMLElement) {
+        const attrs = (node as Element).attributes;
         for (let i = 0; i < attrs.length; i++) {
           const attrName = attrs[i].name;
           const attrValue = attrs[i].value;
           if (attrName.startsWith("block-handler-")) {
+            isActive = true;
             const idx = parseInt(attrName.slice(14), 10);
             info.push({
               type: "handler",
@@ -167,6 +160,7 @@ function buildTree(
               event: attrValue,
             });
           } else if (attrName.startsWith("block-attribute-")) {
+            isActive = true;
             const idx = parseInt(attrName.slice(16), 10);
             info.push({
               type: "attribute",
@@ -175,11 +169,13 @@ function buildTree(
               tag: tagName,
             });
           } else if (attrName === "block-attributes") {
+            isActive = true;
             info.push({
               type: "attributes",
               idx: parseInt(attrValue, 10),
             });
           } else if (attrName === "block-ref") {
+            isActive = true;
             info.push({
               type: "ref",
               idx: parseInt(attrValue, 10),
@@ -196,20 +192,21 @@ function buildTree(
         nextSibling: null,
         el,
         info,
-        refN: 0,
-        currentNS,
+        refN: isActive ? 1 : 0,
       };
 
       if (node.firstChild) {
         const childNode = node.childNodes[0];
         if (
           node.childNodes.length === 1 &&
-          childNode.nodeType === Node.ELEMENT_NODE &&
+          childNode.nodeType === 1 &&
           (childNode as Element).tagName.startsWith("block-child-")
         ) {
           const tagName = (childNode as Element).tagName;
           const index = parseInt(tagName.slice(12), 10);
           info.push({ idx: index, type: "child", isOnlyChild: true });
+          isActive = true;
+          tree.refN = 1;
         } else {
           tree.firstChild = buildTree(node.firstChild, tree, tree);
           el.appendChild(tree.firstChild.el);
@@ -222,16 +219,19 @@ function buildTree(
           }
         }
       }
-      if (tree.info.length) {
-        addRef(tree);
+      if (isActive) {
+        let cur: IntermediateTree | null = tree;
+        while ((cur = cur.parent)) {
+          cur.refN++;
+        }
       }
       return tree;
     }
-    case Node.TEXT_NODE:
-    case Node.COMMENT_NODE: {
+    case 3:
+    case 8: {
       // text node or comment node
       const el =
-        node.nodeType === Node.TEXT_NODE
+        node.nodeType === 3
           ? document.createTextNode(node.textContent!)
           : document.createComment(node.textContent!);
       return {
@@ -241,20 +241,12 @@ function buildTree(
         el,
         info: [],
         refN: 0,
-        currentNS: null,
       };
     }
   }
   throw new Error("boom");
 }
 
-function addRef(tree: IntermediateTree) {
-  tree.isRef = true;
-  do {
-    tree.refN++;
-  } while ((tree = tree.parent as any));
-}
-
 function parentTree(tree: IntermediateTree): IntermediateTree | null {
   let parent = tree.parent;
   while (parent && parent.nextSibling === tree) {
@@ -301,15 +293,21 @@ interface BlockCtx {
   cbRefs: number[];
 }
 
-function buildContext(tree: IntermediateTree, ctx?: BlockCtx, fromIdx?: number): BlockCtx {
+function buildContext(
+  tree: IntermediateTree,
+  ctx?: BlockCtx,
+  fromIdx?: number,
+  toIdx?: number
+): BlockCtx {
   if (!ctx) {
     const children = new Array(tree.info.filter((v) => v.type === "child").length);
     ctx = { collectors: [], locations: [], children, cbRefs: [], refN: tree.refN };
     fromIdx = 0;
+    toIdx = tree.refN - 1;
   }
   if (tree.refN) {
     const initialIdx = fromIdx!;
-    const isRef = tree.isRef;
+    const isRef = tree.forceRef || tree.info.length > 0;
     const firstChild = tree.firstChild ? tree.firstChild.refN : 0;
     const nextSibling = tree.nextSibling ? tree.nextSibling.refN : 0;
 
@@ -327,13 +325,13 @@ function buildContext(tree: IntermediateTree, ctx?: BlockCtx, fromIdx?: number):
     if (nextSibling) {
       const idx = fromIdx! + firstChild;
       ctx.collectors.push({ idx, prevIdx: initialIdx, getVal: nodeGetNextSibling });
-      buildContext(tree.nextSibling!, ctx, idx);
+      buildContext(tree.nextSibling!, ctx, idx, toIdx);
     }
 
     // left
     if (firstChild) {
       ctx.collectors.push({ idx: fromIdx!, prevIdx: initialIdx, getVal: nodeGetFirstChild });
-      buildContext(tree.firstChild!, ctx, fromIdx!);
+      buildContext(tree.firstChild!, ctx, fromIdx!, toIdx! - nextSibling);
     }
   }
 
@@ -398,12 +396,12 @@ function updateCtx(ctx: BlockCtx, tree: IntermediateTree) {
         });
         break;
       case "handler": {
-        const { setup, update } = createEventHandler(info.event!);
+        const setupHandler = createEventHandler(info.event!);
         ctx.locations.push({
           idx: info.idx,
           refIdx: info.refIdx!,
-          setData: setup,
-          updateData: update,
+          setData: setupHandler,
+          updateData: setupHandler,
         });
         break;
       }

src/blockdom/config.ts

@@ -1,13 +1,3 @@
-export function filterOutModifiersFromData(dataList: any[]): { modifiers: string[]; data: any[] } {
-  dataList = dataList.slice();
-  const modifiers = [];
-  let elm;
-  while ((elm = dataList[0]) && typeof elm === "string") {
-    modifiers.push(dataList.shift());
-  }
-  return { modifiers, data: dataList };
-}
-
 export const config = {
   // whether or not blockdom should normalize DOM whenever a block is created.
   // Normalizing dom mean removing empty text nodes (or containing only spaces)
@@ -16,13 +6,11 @@ export const config = {
   // this is the main event handler. Every event handler registered with blockdom
   // will go through this function, giving it the data registered in the block
   // and the event
-  mainEventHandler: (data: any, ev: Event, currentTarget?: EventTarget | null): boolean => {
+  mainEventHandler: (data: any, ev: Event) => {
     if (typeof data === "function") {
       data(ev);
     } else if (Array.isArray(data)) {
-      data = filterOutModifiersFromData(data).data;
       data[0](data[1], ev);
     }
-    return false;
   },
 };

src/blockdom/events.ts

@@ -1,77 +1,21 @@
 import { config } from "./config";
 
-type EventHandlerSetter = (this: HTMLElement, data: any) => void;
-
-interface EventHandlerCreator {
-  setup: EventHandlerSetter;
-  update: EventHandlerSetter;
+export function createEventHandler(event: string) {
+  setupSyntheticEvent(event);
+  const key = `__event__${event}`;
+  return function setupHandler(this: HTMLElement, data: any) {
+    (this as any)[key] = data;
+  };
 }
 
-export function createEventHandler(rawEvent: string): EventHandlerCreator {
-  const eventName = rawEvent.split(".")[0];
-  const capture = rawEvent.includes(".capture");
-  if (rawEvent.includes(".synthetic")) {
-    return createSyntheticHandler(eventName, capture);
-  } else {
-    return createElementHandler(eventName, capture);
-  }
-}
-
-// Native listener
-let nextNativeEventId = 1;
-function createElementHandler(evName: string, capture: boolean = false): EventHandlerCreator {
-  let eventKey = `__event__${evName}_${nextNativeEventId++}`;
-  if (capture) {
-    eventKey = `${eventKey}_capture`;
-  }
-
-  function listener(ev: Event) {
-    const currentTarget = ev.currentTarget;
-    if (!currentTarget || !document.contains(currentTarget as HTMLElement)) return;
-    const data = (currentTarget as any)[eventKey];
-    if (!data) return;
-    config.mainEventHandler(data, ev, currentTarget);
-  }
-
-  function setup(this: HTMLElement, data: any) {
-    (this as any)[eventKey] = data;
-    this.addEventListener(evName, listener, { capture });
-  }
-
-  function update(this: HTMLElement, data: any) {
-    (this as any)[eventKey] = data;
-  }
-
-  return { setup, update };
-}
-
-// Synthetic handler: a form of event delegation that allows placing only one
-// listener per event type.
-let nextSyntheticEventId = 1;
-function createSyntheticHandler(evName: string, capture: boolean = false): EventHandlerCreator {
-  let eventKey = `__event__synthetic_${evName}`;
-  if (capture) {
-    eventKey = `${eventKey}_capture`;
-  }
-  setupSyntheticEvent(evName, eventKey, capture);
-  const currentId = nextSyntheticEventId++;
-  function setup(this: HTMLElement, data: any) {
-    const _data = (this as any)[eventKey] || {};
-    _data[currentId] = data;
-    (this as any)[eventKey] = _data;
-  }
-  return { setup, update: setup };
-}
-
-function nativeToSyntheticEvent(eventKey: string, event: Event) {
+function nativeToSyntheticEvent(event: Event, name: string) {
+  const eventKey = `__event__${name}`;
   let dom = event.target;
   while (dom !== null) {
-    const _data = (dom as any)[eventKey];
-    if (_data) {
-      for (const data of Object.values(_data)) {
-        const stopped = config.mainEventHandler(data, event, dom);
-        if (stopped) return;
-      }
+    const data = (dom as any)[eventKey];
+    if (data) {
+      config.mainEventHandler(data, event);
+      return;
     }
     dom = (dom as any).parentNode;
   }
@@ -79,12 +23,10 @@ function nativeToSyntheticEvent(eventKey: string, event: Event) {
 
 const CONFIGURED_SYNTHETIC_EVENTS: { [event: string]: boolean } = {};
 
-function setupSyntheticEvent(evName: string, eventKey: string, capture: boolean = false) {
-  if (CONFIGURED_SYNTHETIC_EVENTS[eventKey]) {
+function setupSyntheticEvent(name: string) {
+  if (CONFIGURED_SYNTHETIC_EVENTS[name]) {
     return;
   }
-  document.addEventListener(evName, (event) => nativeToSyntheticEvent(eventKey, event), {
-    capture,
-  });
-  CONFIGURED_SYNTHETIC_EVENTS[eventKey] = true;
+  document.addEventListener(name, (event) => nativeToSyntheticEvent(event, name));
+  CONFIGURED_SYNTHETIC_EVENTS[name] = true;
 }

src/blockdom/index.ts

@@ -4,7 +4,7 @@ export { toggler } from "./toggler";
 export { createBlock } from "./block_compiler";
 export { list } from "./list";
 export { multi } from "./multi";
-export { text, comment } from "./text";
+export { text } from "./text";
 export { html } from "./html";
 
 export interface VNode<T = any> {
@@ -23,8 +23,8 @@ export interface VNode<T = any> {
 
 export type BDom = VNode<any>;
 
-export function mount(vnode: VNode, fixture: HTMLElement, afterNode: Node | null = null) {
-  vnode.mount(fixture, afterNode);
+export function mount(vnode: VNode, fixture: HTMLElement) {
+  vnode.mount(fixture, null);
 }
 
 export function patch(vnode1: VNode, vnode2: VNode, withBeforeRemove: boolean = false) {

src/blockdom/text.ts

@@ -8,17 +8,18 @@ const nodeInsertBefore = nodeProto.insertBefore;
 const characterDataSetData = getDescriptor(characterDataProto, "data").set!;
 const nodeRemoveChild = nodeProto.removeChild;
 
-abstract class VSimpleNode {
+class VText {
   text: string;
   parentEl?: HTMLElement | undefined;
-  el?: any;
+  el?: Text;
 
   constructor(text: string) {
     this.text = text;
   }
 
-  mountNode(node: Node, parent: HTMLElement, afterNode: Node | null) {
+  mount(parent: HTMLElement, afterNode: Node | null) {
     this.parentEl = parent;
+    const node = document.createTextNode(toText(this.text));
     nodeInsertBefore.call(parent, node, afterNode);
     this.el = node;
   }
@@ -28,6 +29,14 @@ abstract class VSimpleNode {
     nodeInsertBefore.call(this.parentEl, this.el!, target);
   }
 
+  patch(other: VText) {
+    const text2 = other.text;
+    if (this.text !== text2) {
+      characterDataSetData.call(this.el!, toText(text2));
+      this.text = text2;
+    }
+  }
+
   beforeRemove() {}
 
   remove() {
@@ -43,36 +52,10 @@ abstract class VSimpleNode {
   }
 }
 
-class VText extends VSimpleNode {
-  mount(parent: HTMLElement, afterNode: Node | null) {
-    this.mountNode(document.createTextNode(toText(this.text)), parent, afterNode);
-  }
-
-  patch(other: VText) {
-    const text2 = other.text;
-    if (this.text !== text2) {
-      characterDataSetData.call(this.el!, toText(text2));
-      this.text = text2;
-    }
-  }
-}
-
-class VComment extends VSimpleNode {
-  mount(parent: HTMLElement, afterNode: Node | null) {
-    this.mountNode(document.createComment(toText(this.text)), parent, afterNode);
-  }
-
-  patch() {}
-}
-
 export function text(str: string): VNode<VText> {
   return new VText(str);
 }
 
-export function comment(str: string): VNode<VComment> {
-  return new VComment(str);
-}
-
 export function toText(value: any): string {
   switch (typeof value) {
     case "string":

src/blockdom/toggler.ts

@@ -43,9 +43,7 @@ class VToggler {
     }
   }
 
-  beforeRemove() {
-    this.child.beforeRemove();
-  }
+  beforeRemove() {}
 
   remove() {
     this.child.remove();

src/compiler/index.ts

@@ -1,27 +0,0 @@
-import type { BDom } from "../blockdom";
-import { CodeGenerator, Config } from "./code_generator";
-import { parse } from "./parser";
-
-export type Template = (context: any, vnode: any, key?: string) => BDom;
-
-export type TemplateFunction = (blocks: any, utils: any) => Template;
-
-interface CompileOptions extends Config {
-  name?: string;
-}
-export function compile(template: string | Node, options: CompileOptions = {}): TemplateFunction {
-  // parsing
-  const ast = parse(template);
-
-  // some work
-  const hasSafeContext =
-    template instanceof Node
-      ? !(template instanceof Element) || template.querySelector("[t-set], [t-call]") === null
-      : !template.includes("t-set") && !template.includes("t-call");
-
-  // code generation
-  const codeGenerator = new CodeGenerator(ast, { ...options, hasSafeContext });
-  const code = codeGenerator.generateCode();
-  // template function
-  return new Function("bdom, helpers", code) as TemplateFunction;
-}

src/component/component.ts

@@ -1,4 +1,3 @@
-import type { Env } from "../app/app";
 import type { ComponentNode } from "./component_node";
 
 // -----------------------------------------------------------------------------
@@ -7,21 +6,24 @@ import type { ComponentNode } from "./component_node";
 
 export class Component {
   static template: string = "";
-  static props?: any;
 
   props: any;
-  env: Env;
+  env: any;
   __owl__: ComponentNode;
 
-  constructor(props: any, env: Env, node: ComponentNode) {
+  constructor(props: any, env: any, node: ComponentNode) {
     this.props = props;
     this.env = env;
     this.__owl__ = node;
   }
+  get el(): HTMLElement | Text | undefined {
+    const node = this.__owl__;
+    return node.bdom ? (node.bdom.firstNode() as any) : undefined;
+  }
 
   setup() {}
 
-  render() {
-    this.__owl__.render();
+  render(): Promise<void> {
+    return this.__owl__.render();
   }
 }

src/component/component_node.ts

@@ -1,4 +1,4 @@
-import type { App, Env } from "../app/app";
+import type { App } from "../app";
 import { BDom, VNode } from "../blockdom";
 import { Component } from "./component";
 import {
@@ -6,59 +6,24 @@ import {
   makeChildFiber,
   makeRootFiber,
   MountFiber,
-  MountOptions,
   RootFiber,
+  __internal__destroyed,
 } from "./fibers";
-import { handleError, fibersInError } from "./error_handling";
-import { applyDefaultProps } from "./props_validation";
 import { STATUS } from "./status";
 
-let currentNode: ComponentNode | null = null;
-
-export function getCurrent(): ComponentNode | null {
-  return currentNode;
-}
-
-export function useComponent(): Component {
-  return currentNode!.component;
-}
-
 export function component(
   name: string | typeof Component,
   props: any,
   key: string,
-  tKey: null | string,
   ctx: ComponentNode,
   parent: any
 ): ComponentNode {
-  const parentChildren = ctx.children;
-  const destroy = ComponentNode.prototype.destroy;
-
-  if (tKey) {
-    const parentMap = ctx.keyToTkey;
-    const oldTkey = parentMap[key];
-    if (oldTkey && oldTkey !== tKey) {
-      const oldKey = key + oldTkey;
-      const node = parentChildren[oldKey];
-      if (node && node.status < STATUS.MOUNTED) {
-        destroy.call(node);
-        delete parentChildren[oldKey];
-      }
-    }
-    parentMap[key] = tKey;
-    key = key + tKey;
-  }
-
-  let node: any = parentChildren[key];
+  let node: any = ctx.children[key];
   let isDynamic = typeof name !== "string";
 
-  if (node) {
-    if (node.status < STATUS.MOUNTED) {
-      destroy.call(node);
-      node = undefined;
-    } else if (node.status === STATUS.DESTROYED) {
-      node = undefined;
-    }
+  if (node && node.status < STATUS.MOUNTED) {
+    node.destroy();
+    node = undefined;
   }
   if (isDynamic && node && node.component.constructor !== name) {
     node = undefined;
@@ -69,17 +34,9 @@ export function component(
     node.updateAndRender(props, parentFiber);
   } else {
     // new component
-    let C;
-    if (isDynamic) {
-      C = name;
-    } else {
-      C = parent.constructor.components[name as any];
-      if (!C) {
-        throw new Error(`Cannot find the definition of component "${name}"`);
-      }
-    }
-    node = new ComponentNode(C, props, ctx.app, ctx);
-    parentChildren[key] = node;
+    const C = isDynamic ? name : parent.constructor.components[name as any];
+    node = new ComponentNode(C, props, ctx.app);
+    ctx.children[key] = node;
 
     const fiber = makeChildFiber(node, parentFiber);
     node.initiateRender(fiber);
@@ -91,12 +48,17 @@ export function component(
 //  Component VNode
 // -----------------------------------------------------------------------------
 
+let currentNode: ComponentNode | null = null;
+
+export function getCurrent(): ComponentNode | null {
+  return currentNode;
+}
+
 type LifecycleHook = Function;
 
-export class ComponentNode<T extends typeof Component = typeof Component>
-  implements VNode<ComponentNode>
-{
+export class ComponentNode<T extends typeof Component = any> implements VNode<ComponentNode> {
   el?: HTMLElement | Text | undefined;
+  handlers: any = null;
   app: App;
   fiber: Fiber | null = null;
   component: InstanceType<T>;
@@ -104,12 +66,9 @@ export class ComponentNode<T extends typeof Component = typeof Component>
   status: STATUS = STATUS.NEW;
 
   renderFn: Function;
-  parent: ComponentNode | null;
-  level: number;
-  childEnv: Env;
   children: { [key: string]: ComponentNode } = Object.create(null);
+  slots: any = {};
   refs: any = {};
-  keyToTkey: any = {};
 
   willStart: LifecycleHook[] = [];
   willUpdateProps: LifecycleHook[] = [];
@@ -117,159 +76,118 @@ export class ComponentNode<T extends typeof Component = typeof Component>
   mounted: LifecycleHook[] = [];
   willPatch: LifecycleHook[] = [];
   patched: LifecycleHook[] = [];
-  willDestroy: LifecycleHook[] = [];
+  destroyed: LifecycleHook[] = [];
 
-  constructor(C: T, props: any, app: App, parent?: ComponentNode) {
+  constructor(C: T, props: any, app: App) {
     currentNode = this;
     this.app = app;
-    this.parent = parent || null;
-    this.level = parent ? parent.level + 1 : 0;
-    applyDefaultProps(props, C);
-    const env = (parent && parent.childEnv) || app.env;
-    this.childEnv = env;
-    this.component = new C(props, env, this) as any;
-    this.renderFn = app.getTemplate(C.template).bind(this.component, this.component, this);
+    this.component = new C(props, app.env, this) as any;
+    this.renderFn = app.getTemplate(C.template).bind(null, this.component, this);
     this.component.setup();
   }
 
-  mountComponent(target: any, options?: MountOptions) {
-    const fiber = new MountFiber(this, target, options);
+  mountComponent(target: any): Promise<InstanceType<T>> {
+    const fiber = new MountFiber(this, target);
     this.app.scheduler.addFiber(fiber);
     this.initiateRender(fiber);
+    return fiber.promise.then(() => this.component);
   }
 
   async initiateRender(fiber: Fiber | MountFiber) {
-    this.fiber = fiber;
     if (this.mounted.length) {
       fiber.root.mounted.push(fiber);
     }
     const component = this.component;
-    try {
-      await Promise.all(this.willStart.map((f) => f.call(component)));
-    } catch (e) {
-      handleError({ node: this, error: e });
-      return;
-    }
+    const prom = Promise.all(this.willStart.map((f) => f.call(component)));
+    await prom;
     if (this.status === STATUS.NEW && this.fiber === fiber) {
       this._render(fiber);
     }
   }
 
   async render() {
-    let current = this.fiber;
-    if (current && current.root.locked) {
-      await Promise.resolve();
-      // situation may have changed after the microtask tick
-      current = this.fiber;
+    if (this.fiber && !this.fiber.bdom) {
+      return this.fiber.root.promise;
     }
-    if (current && !current.bdom && !fibersInError.has(current)) {
-      return;
-    }
-    if (!this.bdom && !current) {
+    if (!this.bdom && !this.fiber) {
+      // should find a way to return the future mounting promise
       return;
     }
 
     const fiber = makeRootFiber(this);
-    this.fiber = fiber;
     this.app.scheduler.addFiber(fiber);
     await Promise.resolve();
     if (this.status === STATUS.DESTROYED) {
       return;
     }
-    // We only want to actually render the component if the following two
-    // conditions are true:
-    // * this.fiber: it could be null, in which case the render has been cancelled
-    // * (current || !fiber.parent): if current is not null, this means that the
-    //   render function was called when a render was already occurring. In this
-    //   case, the pending rendering was cancelled, and the fiber needs to be
-    //   rendered to complete the work.  If current is null, we check that the
-    //   fiber has no parent.  If that is the case, the fiber was downgraded from
-    //   a root fiber to a child fiber in the previous microtick, because it was
-    //   embedded in a rendering coming from above, so the fiber will be rendered
-    //   in the next microtick anyway, so we should not render it again.
-    if (this.fiber && (current || !fiber.parent)) {
+    if (this.fiber === fiber) {
       this._render(fiber);
     }
+    return fiber.root.promise;
   }
 
   _render(fiber: Fiber | RootFiber) {
     try {
       fiber.bdom = this.renderFn();
-      fiber.root.counter--;
     } catch (e) {
-      handleError({ node: this, error: e });
+      fiber.root.error = e;
+      this.handleError(fiber);
     }
+    fiber.root.counter--;
+  }
+
+  handleError(fiber: Fiber) {
+    fiber.node.app.destroy();
   }
 
   destroy() {
-    let shouldRemove = this.status === STATUS.MOUNTED;
-    this._destroy();
-    if (shouldRemove) {
+    if (this.status === STATUS.MOUNTED) {
+      callWillUnmount(this);
       this.bdom!.remove();
     }
-  }
+    callDestroyed(this);
 
-  _destroy() {
-    const component = this.component;
-    if (this.status === STATUS.MOUNTED) {
-      for (let cb of this.willUnmount) {
+    function callWillUnmount(node: ComponentNode) {
+      const component = node.component;
+      for (let cb of node.willUnmount) {
+        cb.call(component);
+      }
+      for (let child of Object.values(node.children)) {
+        if (child.status === STATUS.MOUNTED) {
+          callWillUnmount(child);
+        }
+      }
+    }
+
+    function callDestroyed(node: ComponentNode) {
+      const component = node.component;
+      node.status = STATUS.DESTROYED;
+      for (let child of Object.values(node.children)) {
+        callDestroyed(child);
+      }
+      for (let cb of node.destroyed) {
         cb.call(component);
       }
     }
-    for (let child of Object.values(this.children)) {
-      child._destroy();
-    }
-    for (let cb of this.willDestroy) {
-      cb.call(component);
-    }
-    this.status = STATUS.DESTROYED;
   }
 
   async updateAndRender(props: any, parentFiber: Fiber) {
     // update
     const fiber = makeChildFiber(this, parentFiber);
-    this.fiber = fiber;
+    if (this.willPatch.length) {
+      parentFiber.root.willPatch.push(fiber);
+    }
+    if (this.patched.length) {
+      parentFiber.root.patched.push(fiber);
+    }
     const component = this.component;
-    applyDefaultProps(props, component.constructor as any);
     const prom = Promise.all(this.willUpdateProps.map((f) => f.call(component, props)));
     await prom;
     if (fiber !== this.fiber) {
       return;
     }
-    component.props = props;
+    this.component.props = props;
     this._render(fiber);
-    const parentRoot = parentFiber.root;
-    if (this.willPatch.length) {
-      parentRoot.willPatch.push(fiber);
-    }
-    if (this.patched.length) {
-      parentRoot.patched.push(fiber);
-    }
-  }
-
-  /**
-   * Finds a child that has dom that is not yet updated, and update it. This
-   * method is meant to be used only in the context of repatching the dom after
-   * a mounted hook failed and was handled.
-   */
-  updateDom() {
-    if (!this.fiber) {
-      return;
-    }
-    if (this.bdom === this.fiber!.bdom) {
-      // If the error was handled by some child component, we need to find it to
-      // apply its change
-      for (let k in this.children) {
-        const child = this.children[k];
-        child.updateDom();
-      }
-    } else {
-      // if we get here, this is the component that handled the error and rerendered
-      // itself, so we can simply patch the dom
-      this.bdom!.patch(this.fiber!.bdom, false);
-      this.fiber!.appliedToDom = true;
-      this.fiber = null;
-    }
   }
 
   // ---------------------------------------------------------------------------
@@ -288,6 +206,18 @@ export class ComponentNode<T extends typeof Component = typeof Component>
     this.status = STATUS.MOUNTED;
     this.fiber!.appliedToDom = true;
     this.fiber = null;
+    if (this.handlers) {
+      for (let i = 0; i < this.handlers.length; i++) {
+        const handler = this.handlers[i];
+        const eventType = handler[0];
+        const el = bdom.el!;
+        el.addEventListener(eventType, (ev: Event) => {
+          const info = this.handlers![i];
+          const [, ctx, method] = info;
+          (ctx.__owl__.component as any)[method](ev);
+        });
+      }
+    }
   }
 
   moveBefore(other: ComponentNode | null, afterNode: Node | null) {
@@ -301,10 +231,26 @@ export class ComponentNode<T extends typeof Component = typeof Component>
   }
 
   beforeRemove() {
-    this._destroy();
+    visitRemovedNodes(this);
   }
 
   remove() {
     this.bdom!.remove();
   }
 }
+
+function visitRemovedNodes(node: ComponentNode) {
+  if (node.status === STATUS.MOUNTED) {
+    const component = node.component;
+    for (let cb of node.willUnmount) {
+      cb.call(component);
+    }
+  }
+  for (let child of Object.values(node.children)) {
+    visitRemovedNodes(child);
+  }
+  node.status = STATUS.DESTROYED;
+  if (node.destroyed.length) {
+    __internal__destroyed.push(node);
+  }
+}

src/component/error_handling.ts

@@ -1,66 +0,0 @@
-import type { ComponentNode } from "./component_node";
-import type { Fiber } from "./fibers";
-
-// Maps fibers to thrown errors
-export const fibersInError: WeakMap<Fiber, any> = new WeakMap();
-export const nodeErrorHandlers: WeakMap<ComponentNode, ((error: any) => void)[]> = new WeakMap();
-
-function _handleError(node: ComponentNode | null, error: any, isFirstRound = false): boolean {
-  if (!node) {
-    return false;
-  }
-  const fiber = node.fiber;
-  if (fiber) {
-    fibersInError.set(fiber, error);
-  }
-
-  const errorHandlers = nodeErrorHandlers.get(node);
-  if (errorHandlers) {
-    let stopped = false;
-    // execute in the opposite order
-    for (let i = errorHandlers.length - 1; i >= 0; i--) {
-      try {
-        errorHandlers[i](error);
-        stopped = true;
-        break;
-      } catch (e) {
-        error = e;
-      }
-    }
-
-    if (stopped) {
-      if (isFirstRound && fiber) {
-        fiber.root.counter--;
-      }
-      return true;
-    }
-  }
-  return _handleError(node.parent, error);
-}
-
-type ErrorParams = { error: any } & ({ node: ComponentNode } | { fiber: Fiber });
-export function handleError(params: ErrorParams) {
-  const error = params.error;
-  const node = "node" in params ? params.node : params.fiber.node;
-  const fiber = "fiber" in params ? params.fiber : node.fiber!;
-
-  // resets the fibers on components if possible. This is important so that
-  // new renderings can be properly included in the initial one, if any.
-  let current: Fiber | null = fiber;
-  do {
-    current.node.fiber = current;
-    current = current.parent;
-  } while (current);
-
-  fibersInError.set(fiber.root, error);
-
-  const handled = _handleError(node, error, true);
-  if (!handled) {
-    console.warn(`[Owl] Unhandled error. Destroying the root component`);
-    try {
-      node.app.destroy();
-    } catch (e) {
-      console.error(e);
-    }
-  }
-}

src/component/fibers.ts

@@ -1,46 +1,18 @@
-import { BDom, mount } from "../blockdom";
+import type { BDom } from "../blockdom";
+import { mount } from "../blockdom";
 import type { ComponentNode } from "./component_node";
-import { fibersInError, handleError } from "./error_handling";
 import { STATUS } from "./status";
-
-/**
- * Cleans on the root fiber the patch and willPatch fiber lists
- * It is typically needed when the same root fiber needs to recycle on
- * of its children or grandchildren's fiber.
- */
-function cleanPatchableFiber(child: Fiber, root: RootFiber) {
-  const { willPatch, patched } = root;
-  let i = willPatch.indexOf(child);
-  if (i > -1) {
-    willPatch.splice(i, 1);
-  }
-  i = patched.indexOf(child);
-  if (i > -1) {
-    patched.splice(i, 1);
-  }
-}
+// import { mountBlock } from "./bdom/block";
 
 export function makeChildFiber(node: ComponentNode, parent: Fiber): Fiber {
   let current = node.fiber;
   if (current) {
     // current is necessarily a rootfiber here
     let root = parent.root;
-    const isSameRoot = current.root === root;
     cancelFibers(root, current.children);
     current.children = [];
     current.parent = parent;
-    // only increment our rendering if we were not
-    // already accounted for, or that we have been rendered
-    // already (in which case our fiber was removed from the root rendering)
-    if (!isSameRoot || current.bdom) {
-      root.counter++;
-    }
-
-    if (isSameRoot) {
-      cleanPatchableFiber(current, root);
-    }
-
-    current.bdom = null;
+    root.counter++;
     current.root = root;
     return current;
   }
@@ -55,14 +27,9 @@ export function makeRootFiber(node: ComponentNode): Fiber {
     current.children = [];
     root.counter++;
     current.bdom = null;
-    if (fibersInError.has(current)) {
-      fibersInError.delete(current);
-      fibersInError.delete(root);
-      current.appliedToDom = false;
-    }
     return current;
   }
-  const fiber = new RootFiber(node, null);
+  const fiber = new RootFiber(node);
   if (node.willPatch.length) {
     fiber.willPatch.push(fiber);
   }
@@ -99,6 +66,7 @@ export class Fiber {
 
   constructor(node: ComponentNode, parent: Fiber | null) {
     this.node = node;
+    node.fiber = this;
     this.parent = parent;
     if (parent) {
       const root = parent.root;
@@ -113,123 +81,105 @@ export class Fiber {
 
 export class RootFiber extends Fiber {
   counter: number = 1;
+  error: Error | null = null;
+  resolve: any;
+  promise: Promise<any>;
+  reject: any;
 
   // only add stuff in this if they have registered some hooks
   willPatch: Fiber[] = [];
   patched: Fiber[] = [];
   mounted: Fiber[] = [];
-  // A fiber is typically locked when it is completing and the patch has not, or is being applied.
-  // i.e.: render triggered in onWillUnmount or in willPatch will be delayed
-  locked: boolean = false;
+
+  constructor(node: ComponentNode) {
+    super(node, null);
+    this.counter = 1;
+
+    this.promise = new Promise((resolve, reject) => {
+      this.resolve = resolve;
+      this.reject = reject;
+    });
+  }
 
   complete() {
     const node = this.node;
-    this.locked = true;
-    let current: Fiber | undefined = undefined;
-    try {
-      // Step 1: calling all willPatch lifecycle hooks
-      for (current of this.willPatch) {
-        // because of the asynchronous nature of the rendering, some parts of the
-        // UI may have been rendered, then deleted in a followup rendering, and we
-        // do not want to call onWillPatch in that case.
-        let node = current.node;
-        if (node.fiber === current) {
-          const component = node.component;
-          for (let cb of node.willPatch) {
-            cb.call(component);
-          }
+
+    // Step 1: calling all willPatch lifecycle hooks
+    for (let fiber of this.willPatch) {
+      // because of the asynchronous nature of the rendering, some parts of the
+      // UI may have been rendered, then deleted in a followup rendering, and we
+      // do not want to call onWillPatch in that case.
+      let node = fiber.node;
+      if (node.fiber === fiber) {
+        const component = node.component;
+        for (let cb of node.willPatch) {
+          cb.call(component);
         }
       }
-      current = undefined;
-
-      // Step 2: patching the dom
-      node.bdom!.patch(this.bdom!, Object.keys(node.children).length > 0);
-      this.appliedToDom = true;
-
-      this.locked = false;
-      // unregistering the fiber before mounted since it can do another render
-      // and that the current rendering is obviously completed
-      node.fiber = null;
-
-      // Step 4: calling all mounted lifecycle hooks
-      let mountedFibers = this.mounted;
-      while ((current = mountedFibers.pop())) {
-        current = current;
-        if (current.appliedToDom) {
-          for (let cb of current.node.mounted) {
-            cb();
-          }
-        }
-      }
-
-      // Step 5: calling all patched hooks
-      let patchedFibers = this.patched;
-      while ((current = patchedFibers.pop())) {
-        current = current;
-        if (current.appliedToDom) {
-          for (let cb of current.node.patched) {
-            cb();
-          }
-        }
-      }
-    } catch (e) {
-      this.locked = false;
-      handleError({ fiber: current || this, error: e });
     }
+
+    // Step 2: patching the dom
+    node.bdom!.patch(this.bdom!, Object.keys(node.children).length > 0);
+    this.appliedToDom = true;
+
+    // Step 3: calling all destroyed hooks
+    for (let node of __internal__destroyed) {
+      for (let cb of node.destroyed) {
+        cb();
+      }
+    }
+    __internal__destroyed.length = 0;
+
+    // Step 4: calling all mounted lifecycle hooks
+    let current;
+    let mountedFibers = this.mounted;
+    while ((current = mountedFibers.pop())) {
+      if (current.appliedToDom) {
+        for (let cb of current.node.mounted) {
+          cb();
+        }
+      }
+    }
+
+    // Step 5: calling all patched hooks
+    let patchedFibers = this.patched;
+    while ((current = patchedFibers.pop())) {
+      if (current.appliedToDom) {
+        for (let cb of current.node.patched) {
+          cb();
+        }
+      }
+    }
+
+    // unregistering the fiber
+    node.fiber = null;
   }
 }
 
-type Position = "first-child" | "last-child";
-
-export interface MountOptions {
-  position?: Position;
-}
+export let __internal__destroyed: ComponentNode[] = [];
 
 export class MountFiber extends RootFiber {
   target: HTMLElement;
-  position: Position;
 
-  constructor(node: ComponentNode, target: HTMLElement, options: MountOptions = {}) {
-    super(node, null);
+  constructor(node: ComponentNode, target: HTMLElement) {
+    super(node);
     this.target = target;
-    this.position = options.position || "last-child";
   }
   complete() {
-    let current: Fiber | undefined = this;
-    try {
-      const node = this.node;
-      if (node.bdom) {
-        // this is a complicated situation: if we mount a fiber with an existing
-        // bdom, this means that this same fiber was already completed, mounted,
-        // but a crash occurred in some mounted hook. Then, it was handled and
-        // the new rendering is being applied.
-        node.updateDom();
-      } else {
-        node.bdom = this.bdom;
-        if (this.position === "last-child" || this.target.childNodes.length === 0) {
-          mount(node.bdom!, this.target);
-        } else {
-          const firstChild = this.target.childNodes[0];
-          mount(node.bdom!, this.target, firstChild);
+    const node = this.node;
+    node.bdom = this.bdom;
+    mount(node.bdom!, this.target);
+    node.status = STATUS.MOUNTED;
+    this.appliedToDom = true;
+    let current;
+    let mountedFibers = this.mounted;
+    while ((current = mountedFibers.pop())) {
+      if (current.appliedToDom) {
+        for (let cb of current.node.mounted) {
+          cb();
         }
       }
-
-      // unregistering the fiber before mounted since it can do another render
-      // and that the current rendering is obviously completed
-      node.fiber = null;
-
-      node.status = STATUS.MOUNTED;
-      this.appliedToDom = true;
-      let mountedFibers = this.mounted;
-      while ((current = mountedFibers.pop())) {
-        if (current.appliedToDom) {
-          for (let cb of current.node.mounted) {
-            cb();
-          }
-        }
-      }
-    } catch (e) {
-      handleError({ fiber: current as Fiber, error: e });
     }
+    node.fiber = null;
   }
 }

src/component/handler.ts

@@ -1,36 +1,10 @@
-import { filterOutModifiersFromData } from "../blockdom/config";
-
-export const mainEventHandler = (data: any, ev: Event, currentTarget?: EventTarget | null) => {
-  const { data: _data, modifiers } = filterOutModifiersFromData(data);
-  data = _data;
-  let stopped = false;
-  if (modifiers.length) {
-    let selfMode = false;
-    const isSelf = ev.target === currentTarget;
-    for (const mod of modifiers) {
-      switch (mod) {
-        case "self":
-          selfMode = true;
-          if (isSelf) {
-            continue;
-          } else {
-            return stopped;
-          }
-        case "prevent":
-          if ((selfMode && isSelf) || !selfMode) ev.preventDefault();
-          continue;
-        case "stop":
-          if ((selfMode && isSelf) || !selfMode) ev.stopPropagation();
-          stopped = true;
-          continue;
-      }
-    }
+export function mainEventHandler(data: any, ev: Event) {
+  if (typeof data === "function") {
+    data(ev);
+  } else {
+    const ctx = data[0];
+    const method = data[1];
+    const args = data[2] || [];
+    ctx.__owl__.component[method](...args, ev);
   }
-  // If handler is empty, the array slot 0 will also be empty, and data will not have the property 0
-  // We check this rather than data[0] being truthy (or typeof function) so that it crashes
-  // as expected when there is a handler expression that evaluates to a falsy value
-  if (Object.hasOwnProperty.call(data, 0)) {
-    data[0].call(data[1] ? data[1].__owl__.component : null, ev);
-  }
-  return stopped;
-};
+}

src/component/props_validation.ts

@@ -1,133 +0,0 @@
-import { Component } from "./component";
-
-/**
- * Apply default props (only top level).
- *
- * Note that this method does modify in place the props
- */
-export function applyDefaultProps(props: { [key: string]: any }, ComponentClass: typeof Component) {
-  const defaultProps = (ComponentClass as any).defaultProps;
-  if (defaultProps) {
-    for (let propName in defaultProps) {
-      if (props![propName] === undefined) {
-        props![propName] = defaultProps[propName];
-      }
-    }
-  }
-}
-
-//------------------------------------------------------------------------------
-// Prop validation helper
-//------------------------------------------------------------------------------
-function getPropDescription(staticProps: any) {
-  if (staticProps instanceof Array) {
-    return Object.fromEntries(
-      staticProps.map((p) => (p.endsWith("?") ? [p.slice(0, -1), false] : [p, true]))
-    );
-  }
-  return staticProps || { "*": true };
-}
-
-/**
- * Validate the component props (or next props) against the (static) props
- * description.  This is potentially an expensive operation: it may needs to
- * visit recursively the props and all the children to check if they are valid.
- * This is why it is only done in 'dev' mode.
- */
-export const validateProps = function (name: string | typeof Component, props: any, parent?: any) {
-  const ComponentClass = (
-    typeof name !== "string" ? name : parent.constructor.components[name]
-  ) as typeof Component;
-
-  applyDefaultProps(props, ComponentClass);
-
-  let propsDef = getPropDescription(ComponentClass.props);
-  const allowAdditionalProps = "*" in propsDef;
-
-  for (let propName in propsDef) {
-    if (propName === "*") {
-      continue;
-    }
-    if (props[propName] === undefined) {
-      if (propsDef[propName] && !propsDef[propName].optional) {
-        throw new Error(`Missing props '${propName}' (component '${ComponentClass.name}')`);
-      } else {
-        continue;
-      }
-    }
-    let isValid;
-    try {
-      isValid = isValidProp(props[propName], propsDef[propName]);
-    } catch (e) {
-      (e as Error).message = `Invalid prop '${propName}' in component ${ComponentClass.name} (${
-        (e as Error).message
-      })`;
-      throw e;
-    }
-    if (!isValid) {
-      throw new Error(`Invalid Prop '${propName}' in component '${ComponentClass.name}'`);
-    }
-  }
-  if (!allowAdditionalProps) {
-    for (let propName in props) {
-      if (!(propName in propsDef)) {
-        throw new Error(`Unknown prop '${propName}' given to component '${ComponentClass.name}'`);
-      }
-    }
-  }
-};
-
-/**
- * Check if an invidual prop value matches its (static) prop definition
- */
-function isValidProp(prop: any, propDef: any): boolean {
-  if (propDef === true) {
-    return true;
-  }
-  if (typeof propDef === "function") {
-    // Check if a value is constructed by some Constructor.  Note that there is a
-    // slight abuse of language: we want to consider primitive values as well.
-    //
-    // So, even though 1 is not an instance of Number, we want to consider that
-    // it is valid.
-    if (typeof prop === "object") {
-      return prop instanceof propDef;
-    }
-    return typeof prop === propDef.name.toLowerCase();
-  } else if (propDef instanceof Array) {
-    // If this code is executed, this means that we want to check if a prop
-    // matches at least one of its descriptor.
-    let result = false;
-    for (let i = 0, iLen = propDef.length; i < iLen; i++) {
-      result = result || isValidProp(prop, propDef[i]);
-    }
-    return result;
-  }
-  // propsDef is an object
-  if (propDef.optional && prop === undefined) {
-    return true;
-  }
-  let result = propDef.type ? isValidProp(prop, propDef.type) : true;
-  if (propDef.validate) {
-    result = result && propDef.validate(prop);
-  }
-  if (propDef.type === Array && propDef.element) {
-    for (let i = 0, iLen = prop.length; i < iLen; i++) {
-      result = result && isValidProp(prop[i], propDef.element);
-    }
-  }
-  if (propDef.type === Object && propDef.shape) {
-    const shape = propDef.shape;
-    for (let key in shape) {
-      result = result && isValidProp(prop[key], shape[key]);
-    }
-    if (result) {
-      for (let propName in prop) {
-        if (!(propName in shape)) {
-          throw new Error(`unknown prop '${propName}'`);
-        }
-      }
-    }
-  }
-  return result;
-}

src/component/scheduler.ts

@@ -1,4 +1,3 @@
-import { fibersInError } from "./error_handling";
 import { Fiber, RootFiber } from "./fibers";
 import { STATUS } from "./status";
 
@@ -38,23 +37,29 @@ export class Scheduler {
   flush() {
     this.tasks.forEach((fiber) => {
       if (fiber.root !== fiber) {
+        // this is wrong! should be something like
+        // if (this.tasks.has(fiber.root)) {
+        //   // parent rendering has completed
+        //   fiber.resolve();
+        //   this.tasks.delete(fiber);
+        // }
         this.tasks.delete(fiber);
         return;
       }
-      const hasError = fibersInError.has(fiber);
-      if (hasError && fiber.counter !== 0) {
+      if (fiber.error) {
         this.tasks.delete(fiber);
+        fiber.reject(fiber.error);
         return;
       }
       if (fiber.node.status === STATUS.DESTROYED) {
         this.tasks.delete(fiber);
         return;
       }
-
       if (fiber.counter === 0) {
-        if (!hasError) {
+        if (!fiber.error) {
           fiber.complete();
         }
+        fiber.resolve();
         this.tasks.delete(fiber);
       }
     });

src/event_bus.ts

@@ -0,0 +1,5 @@
+export class EventBus extends EventTarget {
+  trigger(name: string, payload?: any) {
+    this.dispatchEvent(new CustomEvent(name, { detail: payload }));
+  }
+}

src/hooks.ts

@@ -1,119 +0,0 @@
-import type { Env } from "./app/app";
-import { getCurrent } from "./component/component_node";
-import { onMounted, onPatched, onWillUnmount } from "./component/lifecycle_hooks";
-
-// -----------------------------------------------------------------------------
-// useRef
-// -----------------------------------------------------------------------------
-
-/**
- * The purpose of this hook is to allow components to get a reference to a sub
- * html node or component.
- */
-export function useRef<T extends HTMLElement = HTMLElement>(name: string): { el: T | null } {
-  const node = getCurrent()!;
-  const refs = node.refs;
-  return {
-    get el(): T | null {
-      return refs[name] || null;
-    },
-  };
-}
-
-// -----------------------------------------------------------------------------
-// useEnv and useSubEnv
-// -----------------------------------------------------------------------------
-
-/**
- * This hook is useful as a building block for some customized hooks, that may
- * need a reference to the env of the component calling them.
- */
-export function useEnv<E extends Env>(): E {
-  return getCurrent()!.component.env as any;
-}
-
-/**
- * This hook is a simple way to let components use a sub environment.  Note that
- * like for all hooks, it is important that this is only called in the
- * constructor method.
- */
-export function useSubEnv(envExtension: Env) {
-  const node = getCurrent()!;
-  const env = Object.create(node.childEnv);
-  const descrs = Object.getOwnPropertyDescriptors(envExtension);
-  node.childEnv = Object.freeze(Object.defineProperties(env, descrs));
-}
-
-// -----------------------------------------------------------------------------
-// useEffect
-// -----------------------------------------------------------------------------
-
-const NO_OP = () => {};
-/**
- * @param {...any} dependencies the dependencies computed by computeDependencies
- * @returns {void|(()=>void)} a cleanup function that reverses the side
- *      effects of the effect callback.
- */
-type Effect = (...dependencies: any[]) => void | (() => void);
-
-/**
- * This hook will run a callback when a component is mounted and patched, and
- * will run a cleanup function before patching and before unmounting the
- * the component.
- *
- * @param {Effect} effect the effect to run on component mount and/or patch
- * @param {()=>any[]} [computeDependencies=()=>[NaN]] a callback to compute
- *      dependencies that will decide if the effect needs to be cleaned up and
- *      run again. If the dependencies did not change, the effect will not run
- *      again. The default value returns an array containing only NaN because
- *      NaN !== NaN, which will cause the effect to rerun on every patch.
- */
-export function useEffect(effect: Effect, computeDependencies: () => any[] = () => [NaN]) {
-  let cleanup: () => void;
-  let dependencies: any[];
-  onMounted(() => {
-    dependencies = computeDependencies();
-    cleanup = effect(...dependencies) || NO_OP;
-  });
-
-  onPatched(() => {
-    const newDeps = computeDependencies();
-    const shouldReapply = newDeps.some((val, i) => val !== dependencies[i]);
-    if (shouldReapply) {
-      dependencies = newDeps;
-      cleanup();
-      cleanup = effect(...dependencies) || NO_OP;
-    }
-  });
-
-  onWillUnmount(() => cleanup());
-}
-
-// -----------------------------------------------------------------------------
-// useExternalListener
-// -----------------------------------------------------------------------------
-
-/**
- * When a component needs to listen to DOM Events on element(s) that are not
- * part of his hierarchy, we can use the `useExternalListener` hook.
- * It will correctly add and remove the event listener, whenever the
- * component is mounted and unmounted.
- *
- * Example:
- *  a menu needs to listen to the click on window to be closed automatically
- *
- * Usage:
- *  in the constructor of the OWL component that needs to be notified,
- *  `useExternalListener(window, 'click', this._doSomething);`
- * */
-export function useExternalListener(
-  target: HTMLElement | typeof window,
-  eventName: string,
-  handler: EventListener,
-  eventParams?: AddEventListenerOptions
-) {
-  const node = getCurrent()!;
-  const boundHandler = handler.bind(node.component);
-  onMounted(() => target.addEventListener(eventName, boundHandler, eventParams));
-  onWillUnmount(() => target.removeEventListener(eventName, boundHandler, eventParams));
-}

src/index.ts

@@ -9,7 +9,6 @@ import {
   remove,
   text,
   toggler,
-  comment,
 } from "./blockdom";
 import { mainEventHandler } from "./component/handler";
 
@@ -29,19 +28,37 @@ export const blockDom = {
   toggler,
   createBlock,
   html,
-  comment,
 };
 
-export { App, mount } from "./app/app";
-export { Component } from "./component/component";
-export { useComponent } from "./component/component_node";
+// import { makeBlockClass } from "./_old_bdom/element";
+import { App } from "./app";
+import { Component } from "./component/component";
+import { getCurrent } from "./component/component_node";
+// import { getCurrent } from "./b_node";
+
+export { App, Component };
+
+export async function mount<T extends typeof Component>(
+  C: T,
+  target: HTMLElement
+): Promise<InstanceType<T>> {
+  const app = new App(C);
+  return app.mount(target);
+}
+
+export function useComponent(): Component {
+  const current = getCurrent();
+  return current!.component;
+}
+
 export { status } from "./component/status";
-export { Portal } from "./portal";
-export { Memo } from "./memo";
-export { xml } from "./app/template_set";
-export { useState, reactive } from "./reactivity";
-export { useEffect, useEnv, useExternalListener, useRef, useSubEnv } from "./hooks";
-export { EventBus, whenReady, loadFile, markup } from "./utils";
+export { Portal } from "./misc/portal";
+export { Memo } from "./misc/memo";
+export { xml } from "./tags";
+export { useState } from "./reactivity";
+export { useRef } from "./refs";
+export { EventBus } from "./event_bus";
+
 export {
   onWillStart,
   onMounted,
@@ -49,10 +66,8 @@ export {
   onWillUpdateProps,
   onWillPatch,
   onPatched,
-  onWillRender,
-  onRendered,
-  onWillDestroy,
-  onError,
-} from "./component/lifecycle_hooks";
+  onRender,
+  onDestroyed,
+} from "./lifecycle_hooks";
 
 export const __info__ = {};

src/lifecycle_hooks.ts

@@ -1,5 +1,4 @@
-import { getCurrent } from "./component_node";
-import { nodeErrorHandlers } from "./error_handling";
+import { getCurrent } from "./component/component_node";
 
 // -----------------------------------------------------------------------------
 //  hooks
@@ -22,7 +21,7 @@ export function onMounted(fn: () => void | any) {
 
 export function onWillPatch(fn: () => Promise<void> | any | void) {
   const node = getCurrent()!;
-  node.willPatch.unshift(fn);
+  node.willPatch.push(fn);
 }
 
 export function onPatched(fn: () => void | any) {
@@ -32,15 +31,15 @@ export function onPatched(fn: () => void | any) {
 
 export function onWillUnmount(fn: () => Promise<void> | void | any) {
   const node = getCurrent()!;
-  node.willUnmount.unshift(fn);
+  node.willUnmount.push(fn);
 }
 
-export function onWillDestroy(fn: () => Promise<void> | void | any) {
+export function onDestroyed(fn: () => Promise<void> | void | any) {
   const node = getCurrent()!;
-  node.willDestroy.push(fn);
+  node.destroyed.push(fn);
 }
 
-export function onWillRender(fn: () => void | any) {
+export function onRender(fn: () => void | any) {
   const node = getCurrent()!;
   const renderFn = node.renderFn;
   node.renderFn = () => {
@@ -48,24 +47,3 @@ export function onWillRender(fn: () => void | any) {
     return renderFn();
   };
 }
-
-export function onRendered(fn: () => void | any) {
-  const node = getCurrent()!;
-  const renderFn = node.renderFn;
-  node.renderFn = () => {
-    const result = renderFn();
-    fn();
-    return result;
-  };
-}
-
-type OnErrorCallback = (error: any) => void | any;
-export function onError(callback: OnErrorCallback) {
-  const node = getCurrent()!;
-  let handlers = nodeErrorHandlers.get(node);
-  if (!handlers) {
-    handlers = [];
-    nodeErrorHandlers.set(node, handlers);
-  }
-  handlers.push(callback);
-}

src/misc/memo.ts

@@ -1,7 +1,7 @@
-import { Component } from "./component/component";
-import type { ComponentNode } from "./component/component_node";
-import { xml } from "./app/template_set";
-import { Fiber } from "./component/fibers";
+import { Component } from "../component/component";
+import type { ComponentNode } from "../component/component_node";
+import { xml } from "../tags";
+import { Fiber } from "../component/fibers";
 
 export class Memo extends Component {
   static template = xml`<t t-slot="default"/>`;
@@ -39,7 +39,7 @@ export class Memo extends Component {
  */
 function shallowEqual(p1: any, p2: any): boolean {
   for (let k in p1) {
-    if (k !== "slots" && p1[k] !== p2[k]) {
+    if (p1[k] !== p2[k]) {
       return false;
     }
   }

src/misc/portal.ts

@@ -1,7 +1,7 @@
-import type { ComponentNode } from "./component/component_node";
-import { Component } from "./component/component";
-import { xml } from "./app/template_set";
-import { BDom, text, VNode } from "./blockdom";
+import type { ComponentNode } from "../component/component_node";
+import { Component } from "../component/component";
+import { xml } from "../tags";
+import { BDom, text, VNode } from "../blockdom";
 
 const VText: any = text("").constructor;
 
@@ -53,12 +53,6 @@ class VPortal extends VText implements Partial<VNode<VPortal>> {
 
 export class Portal extends Component {
   static template = xml`<t t-slot="default"/>`;
-  static props = {
-    target: {
-      type: String,
-    },
-    slots: true,
-  };
 
   constructor(props: any, env: any, node: ComponentNode) {
     super(props, env, node);

src/qweb/inline_expressions.ts

@@ -70,7 +70,6 @@ interface Token {
   size?: number;
   varName?: string;
   replace?: Function;
-  isLocal?: boolean;
 }
 
 const STATIC_TOKEN_MAP: { [key: string]: TKind } = Object.assign(Object.create(null), {
@@ -326,13 +325,6 @@ export function compileExprToArray(expr: string): Token[] {
     }
     i++;
   }
-  // Mark all variables that have been used locally.
-  // This assumes the expression has only one scope (incorrect but "good enough for now")
-  for (const token of tokens) {
-    if (token.type === "SYMBOL" && localVars.has(token.value)) {
-      token.isLocal = true;
-    }
-  }
   return tokens;
 }
 

src/qweb/parser.ts

@@ -11,7 +11,7 @@ export const enum ASTType {
   TIf,
   TSet,
   TCall,
-  TOut,
+  TRaw,
   TForEach,
   TKey,
   TComponent,
@@ -19,7 +19,6 @@ export const enum ASTType {
   TLog,
   TSlot,
   TCallBlock,
-  TTranslation,
 }
 
 export interface ASTText {
@@ -35,21 +34,10 @@ export interface ASTComment {
 export interface ASTDomNode {
   type: ASTType.DomNode;
   tag: string;
-  dynamicTag: string | null;
   attrs: { [key: string]: string };
   content: AST[];
   ref: string | null;
   on: { [key: string]: string };
-  model: {
-    baseExpr: string;
-    expr: string;
-    targetAttr: string;
-    specialInitTargetAttr: string | null;
-    eventType: "change" | "click" | "input";
-    shouldTrim: boolean;
-    shouldNumberize: boolean;
-  } | null;
-  ns: string | null;
 }
 
 export interface ASTMulti {
@@ -63,8 +51,8 @@ export interface ASTTEsc {
   defaultValue: string;
 }
 
-export interface ASTTOut {
-  type: ASTType.TOut;
+export interface ASTTRaw {
+  type: ASTType.TRaw;
   expr: string;
   body: AST[] | null;
 }
@@ -116,15 +104,14 @@ export interface ASTComponent {
   type: ASTType.TComponent;
   name: string;
   isDynamic: boolean;
-  dynamicProps: string | null;
   props: { [name: string]: string };
-  slots: { [name: string]: { content: AST; attrs?: { [key: string]: string }; scope?: string } };
+  handlers: { [event: string]: string };
+  slots: { [name: string]: AST };
 }
 
 export interface ASTSlot {
   type: ASTType.TSlot;
   name: string;
-  attrs: { [key: string]: string };
   defaultContent: AST | null;
 }
 
@@ -144,11 +131,6 @@ export interface ASTLog {
   content: AST | null;
 }
 
-export interface ASTTranslation {
-  type: ASTType.TTranslation;
-  content: AST | null;
-}
-
 export type AST =
   | ASTText
   | ASTComment
@@ -158,29 +140,27 @@ export type AST =
   | ASTTif
   | ASTTSet
   | ASTTCall
-  | ASTTOut
+  | ASTTRaw
   | ASTTForEach
   | ASTTKey
   | ASTComponent
   | ASTSlot
   | ASTTCallBlock
   | ASTLog
-  | ASTDebug
-  | ASTTranslation;
+  | ASTDebug;
 
 // -----------------------------------------------------------------------------
 // Parser
 // -----------------------------------------------------------------------------
 interface ParsingContext {
   inPreTag: boolean;
-  inSVG: boolean;
 }
 
-export function parse(xml: string | Node): AST {
-  const node = xml instanceof Element ? xml : (parseXML(`<t>${xml}</t>`).firstChild! as Element);
-  normalizeXML(node);
-  const ctx = { inPreTag: false, inSVG: false };
-  const ast = parseNode(node, ctx);
+export function parse(xml: string): AST {
+  const template = `<t>${xml}</t>`;
+  const doc = parseXML(template);
+  const ctx = { inPreTag: false };
+  const ast = parseNode(doc.firstChild!, ctx);
   if (!ast) {
     return { type: ASTType.Text, value: "" };
   }
@@ -199,9 +179,8 @@ function parseNode(node: ChildNode, ctx: ParsingContext): AST | null {
     parseTCallBlock(node, ctx) ||
     parseTEscNode(node, ctx) ||
     parseTKey(node, ctx) ||
-    parseTTranslation(node, ctx) ||
     parseTSlot(node, ctx) ||
-    parseTOutNode(node, ctx) ||
+    parseTRawNode(node, ctx) ||
     parseComponent(node, ctx) ||
     parseDOMNode(node, ctx) ||
     parseTSetNode(node, ctx) ||
@@ -217,7 +196,24 @@ function parseTNode(node: Element, ctx: ParsingContext): AST | null {
   if (node.tagName !== "t") {
     return null;
   }
-  return parseChildNodes(node, ctx);
+  const children: AST[] = [];
+  for (let child of node.childNodes) {
+    const ast = parseNode(child, ctx);
+    if (ast) {
+      children.push(ast);
+    }
+  }
+  switch (children.length) {
+    case 0:
+      return null;
+    case 1:
+      return children[0];
+    default:
+      return {
+        type: ASTType.Multi,
+        content: children,
+      };
+  }
 }
 
 // -----------------------------------------------------------------------------
@@ -227,7 +223,7 @@ const lineBreakRE = /[\r\n]/;
 const whitespaceRE = /\s+/g;
 
 function parseTextCommentNode(node: ChildNode, ctx: ParsingContext): AST | null {
-  if (node.nodeType === Node.TEXT_NODE) {
+  if (node.nodeType === 3) {
     let value = node.textContent || "";
     if (!ctx.inPreTag) {
       if (lineBreakRE.test(value) && !value.trim()) {
@@ -237,7 +233,7 @@ function parseTextCommentNode(node: ChildNode, ctx: ParsingContext): AST | null
     }
 
     return { type: ASTType.Text, value };
-  } else if (node.nodeType === Node.COMMENT_NODE) {
+  } else if (node.nodeType === 8) {
     return { type: ASTType.Comment, value: node.textContent || "" };
   }
   return null;
@@ -271,79 +267,38 @@ function parseTDebugLog(node: Element, ctx: ParsingContext): AST | null {
 // -----------------------------------------------------------------------------
 // Regular dom node
 // -----------------------------------------------------------------------------
-const hasDotAtTheEnd = /\.[\w_]+\s*$/;
-const hasBracketsAtTheEnd = /\[[^\[]+\]\s*$/;
 
 function parseDOMNode(node: Element, ctx: ParsingContext): AST | null {
-  const { tagName } = node;
-  const dynamicTag = node.getAttribute("t-tag");
-  node.removeAttribute("t-tag");
-  if (tagName === "t" && !dynamicTag) {
+  if (node.tagName === "t") {
     return null;
   }
-  ctx = Object.assign({}, ctx);
-  if (tagName === "pre") {
-    ctx.inPreTag = true;
+  const children: AST[] = [];
+  if (node.tagName === "pre") {
+    ctx = { inPreTag: true };
+  }
+  let ref = null;
+  if (node.hasAttribute("t-ref")) {
+    ref = node.getAttribute("t-ref");
+    node.removeAttribute("t-ref");
   }
-  const shouldAddSVGNS = tagName === "svg" || (tagName === "g" && !ctx.inSVG);
-  ctx.inSVG = ctx.inSVG || shouldAddSVGNS;
-  const ns = shouldAddSVGNS ? "http://www.w3.org/2000/svg" : null;
-  const ref = node.getAttribute("t-ref");
-  node.removeAttribute("t-ref");
 
-  const children = parseChildren(node, ctx);
+  for (let child of node.childNodes) {
+    const ast = parseNode(child, ctx);
+    if (ast) {
+      children.push(ast);
+    }
+  }
 
-  const nodeAttrsNames = node.getAttributeNames();
   const attrs: ASTDomNode["attrs"] = {};
   const on: ASTDomNode["on"] = {};
-  let model: ASTDomNode["model"] = null;
 
-  for (let attr of nodeAttrsNames) {
+  for (let attr of node.getAttributeNames()) {
     const value = node.getAttribute(attr)!;
     if (attr.startsWith("t-on")) {
       if (attr === "t-on") {
         throw new Error("Missing event name with t-on directive");
       }
       on[attr.slice(5)] = value;
-    } else if (attr.startsWith("t-model")) {
-      if (!["input", "select", "textarea"].includes(tagName)) {
-        throw new Error("The t-model directive only works with <input>, <textarea> and <select>");
-      }
-
-      let baseExpr, expr;
-      if (hasDotAtTheEnd.test(value)) {
-        const index = value.lastIndexOf(".");
-        baseExpr = value.slice(0, index);
-        expr = `'${value.slice(index + 1)}'`;
-      } else if (hasBracketsAtTheEnd.test(value)) {
-        const index = value.lastIndexOf("[");
-        baseExpr = value.slice(0, index);
-        expr = value.slice(index + 1, -1);
-      } else {
-        throw new Error(`Invalid t-model expression: "${value}" (it should be assignable)`);
-      }
-
-      const typeAttr = node.getAttribute("type");
-      const isInput = tagName === "input";
-      const isSelect = tagName === "select";
-      const isTextarea = tagName === "textarea";
-      const isCheckboxInput = isInput && typeAttr === "checkbox";
-      const isRadioInput = isInput && typeAttr === "radio";
-      const isOtherInput = isInput && !isCheckboxInput && !isRadioInput;
-      const hasLazyMod = attr.includes(".lazy");
-      const hasNumberMod = attr.includes(".number");
-      const hasTrimMod = attr.includes(".trim");
-      const eventType = isRadioInput ? "click" : isSelect || hasLazyMod ? "change" : "input";
-
-      model = {
-        baseExpr,
-        expr,
-        targetAttr: isCheckboxInput ? "checked" : "value",
-        specialInitTargetAttr: isRadioInput ? "checked" : null,
-        eventType,
-        shouldTrim: hasTrimMod && (isOtherInput || isTextarea),
-        shouldNumberize: hasNumberMod && (isOtherInput || isTextarea),
-      };
     } else {
       if (attr.startsWith("t-") && !attr.startsWith("t-att")) {
         throw new Error(`Unknown QWeb directive: '${attr}'`);
@@ -356,14 +311,11 @@ function parseDOMNode(node: Element, ctx: ParsingContext): AST | null {
   }
   return {
     type: ASTType.DomNode,
-    tag: tagName,
-    dynamicTag,
+    tag: node.tagName,
     attrs,
     on,
     ref,
     content: children,
-    model,
-    ns,
   };
 }
 
@@ -388,53 +340,56 @@ function parseTEscNode(node: Element, ctx: ParsingContext): AST | null {
   if (!ast) {
     return tesc;
   }
-  if (ast.type === ASTType.DomNode) {
+  if (ast && ast.type === ASTType.DomNode) {
     return {
-      ...ast,
+      type: ASTType.DomNode,
+      tag: ast.tag,
+      attrs: ast.attrs,
+      on: ast.on,
       ref,
       content: [tesc],
     };
   }
-  if (ast.type === ASTType.TComponent) {
-    throw new Error("t-esc is not supported on Component nodes");
+  if (ast && ast.type === ASTType.TComponent) {
+    return {
+      ...ast,
+      slots: { default: tesc },
+    };
   }
   return tesc;
 }
 
 // -----------------------------------------------------------------------------
-// t-out
+// t-raw
 // -----------------------------------------------------------------------------
 
-function parseTOutNode(node: Element, ctx: ParsingContext): AST | null {
-  if (!node.hasAttribute("t-out") && !node.hasAttribute("t-raw")) {
+function parseTRawNode(node: Element, ctx: ParsingContext): AST | null {
+  if (!node.hasAttribute("t-raw")) {
     return null;
   }
-  if (node.hasAttribute("t-raw")) {
-    console.warn(
-      `t-raw has been deprecated in favor of t-out. If the value to render is not wrapped by the "markup" function, it will be escaped`
-    );
-  }
-  const expr = (node.getAttribute("t-out") || node.getAttribute("t-raw"))!;
-  node.removeAttribute("t-out");
+  const expr = node.getAttribute("t-raw")!;
   node.removeAttribute("t-raw");
 
-  const tOut: AST = { type: ASTType.TOut, expr, body: null };
+  const tRaw: AST = { type: ASTType.TRaw, expr, body: null };
   const ref = node.getAttribute("t-ref");
   node.removeAttribute("t-ref");
   const ast = parseNode(node, ctx);
   if (!ast) {
-    return tOut;
+    return tRaw;
   }
-  if (ast.type === ASTType.DomNode) {
-    tOut.body = ast.content.length ? ast.content : null;
+  if (ast && ast.type === ASTType.DomNode) {
+    tRaw.body = ast.content.length ? ast.content : null;
     return {
-      ...ast,
+      type: ASTType.DomNode,
+      tag: ast.tag,
+      attrs: ast.attrs,
+      on: ast.on,
       ref,
-      content: [tOut],
+      content: [tRaw],
     };
   }
 
-  return tOut;
+  return tRaw;
 }
 
 // -----------------------------------------------------------------------------
@@ -451,11 +406,6 @@ function parseTForEach(node: Element, ctx: ParsingContext): AST | null {
   const elem = node.getAttribute("t-as") || "";
   node.removeAttribute("t-as");
   const key = node.getAttribute("t-key");
-  if (!key) {
-    throw new Error(
-      `"Directive t-foreach should always be used with a t-key!" (expression: t-foreach="${collection}" t-as="${elem}")`
-    );
-  }
   node.removeAttribute("t-key");
   const memo = node.getAttribute("t-memo") || "";
   node.removeAttribute("t-memo");
@@ -493,7 +443,7 @@ function parseTForEach(node: Element, ctx: ParsingContext): AST | null {
 function hasNoComponent(ast: AST): boolean {
   switch (ast.type) {
     case ASTType.TComponent:
-    case ASTType.TOut:
+    case ASTType.TRaw:
     case ASTType.TCall:
     case ASTType.TCallBlock:
     case ASTType.TSlot:
@@ -507,7 +457,6 @@ function hasNoComponent(ast: AST): boolean {
       return hasNoComponent(ast.content);
     case ASTType.TDebug:
     case ASTType.TLog:
-    case ASTType.TTranslation:
       return ast.content ? hasNoComponent(ast.content) : true;
     case ASTType.TForEach:
       return ast.hasNoComponent;
@@ -573,11 +522,17 @@ function parseTCall(node: Element, ctx: ParsingContext): AST | null {
     if (ast && ast.type === ASTType.TComponent) {
       return {
         ...ast,
-        slots: { default: { content: tcall } },
+        slots: { default: tcall },
       };
     }
   }
-  const body = parseChildren(node, ctx);
+  const body: AST[] = [];
+  for (let child of node.childNodes) {
+    const ast = parseNode(child, ctx);
+    if (ast) {
+      body.push(ast);
+    }
+  }
 
   return {
     type: ASTType.TCall,
@@ -611,7 +566,10 @@ function parseTIf(node: Element, ctx: ParsingContext): AST | null {
   }
   const condition = node.getAttribute("t-if")!;
   node.removeAttribute("t-if");
-  const content = parseNode(node, ctx) || { type: ASTType.Text, value: "" };
+  const content = parseNode(node, ctx);
+  if (!content) {
+    throw new Error("hmmm");
+  }
 
   let nextElement = node.nextElementSibling;
   // t-elifs
@@ -658,7 +616,13 @@ function parseTSetNode(node: Element, ctx: ParsingContext): AST | null {
   const defaultValue = node.innerHTML === node.textContent ? node.textContent || null : null;
   let body: AST[] | null = null;
   if (node.textContent !== node.innerHTML) {
-    body = parseChildren(node, ctx);
+    body = [];
+    for (let child of node.childNodes) {
+      let childAst = parseNode(child, ctx);
+      if (childAst) {
+        body.push(childAst);
+      }
+    }
   }
   return { type: ASTType.TSet, name, value, defaultValue, body };
 }
@@ -667,29 +631,11 @@ function parseTSetNode(node: Element, ctx: ParsingContext): AST | null {
 // Components
 // -----------------------------------------------------------------------------
 
-// Error messages when trying to use an unsupported directive on a component
-const directiveErrorMap = new Map([
-  ["t-on", "t-on is no longer supported on components. Consider passing a callback in props."],
-  [
-    "t-ref",
-    "t-ref is no longer supported on components. Consider exposing only the public part of the component's API through a callback prop.",
-  ],
-  ["t-att", "t-att makes no sense on component: props are already treated as expressions"],
-  [
-    "t-attf",
-    "t-attf is not supported on components: use template strings for string interpolation in props",
-  ],
-]);
-
 function parseComponent(node: Element, ctx: ParsingContext): AST | null {
   let name = node.tagName;
   const firstLetter = name[0];
   let isDynamic = node.hasAttribute("t-component");
 
-  if (isDynamic && name !== "t") {
-    throw new Error(`Directive 't-component' can only be used on <t> nodes (used on a <${name}>)`);
-  }
-
   if (!(firstLetter === firstLetter.toUpperCase() || isDynamic)) {
     return null;
   }
@@ -698,15 +644,12 @@ function parseComponent(node: Element, ctx: ParsingContext): AST | null {
     node.removeAttribute("t-component");
   }
 
-  const dynamicProps = node.getAttribute("t-props");
-  node.removeAttribute("t-props");
-
   const props: ASTComponent["props"] = {};
+  const handlers: ASTComponent["handlers"] = {};
   for (let name of node.getAttributeNames()) {
     const value = node.getAttribute(name)!;
-    if (name.startsWith("t-")) {
-      const message = directiveErrorMap.get(name.split("-").slice(0, 2).join("-"));
-      throw new Error(message || `unsupported directive on Component: ${name}`);
+    if (name.startsWith("t-on-")) {
+      handlers[name.slice(5)] = value;
     } else {
       props[name] = value;
     }
@@ -719,11 +662,6 @@ function parseComponent(node: Element, ctx: ParsingContext): AST | null {
     // named slots
     const slotNodes = Array.from(clone.querySelectorAll("[t-set-slot]"));
     for (let slotNode of slotNodes) {
-      if (slotNode.tagName !== "t") {
-        throw new Error(
-          `Directive 't-set-slot' can only be used on <t> nodes (used on a <${slotNode.tagName}>)`
-        );
-      }
       const name = slotNode.getAttribute("t-set-slot")!;
 
       // check if this is defined in a sub component (in which case it should
@@ -745,30 +683,17 @@ function parseComponent(node: Element, ctx: ParsingContext): AST | null {
       slotNode.remove();
       const slotAst = parseNode(slotNode, ctx);
       if (slotAst) {
-        const slotInfo: any = { content: slotAst };
-        const attrs: { [key: string]: string } = {};
-        for (let attributeName of slotNode.getAttributeNames()) {
-          const value = slotNode.getAttribute(attributeName)!;
-          if (attributeName === "t-slot-scope") {
-            slotInfo.scope = value;
-            continue;
-          }
-          attrs[attributeName] = value;
-        }
-        if (Object.keys(attrs).length) {
-          slotInfo.attrs = attrs;
-        }
-        slots[name] = slotInfo;
+        slots[name] = slotAst;
       }
     }
 
     // default slot
     const defaultContent = parseChildNodes(clone, ctx);
     if (defaultContent) {
-      slots.default = { content: defaultContent };
+      slots.default = defaultContent;
     }
   }
-  return { type: ASTType.TComponent, name, isDynamic, dynamicProps, props, slots };
+  return { type: ASTType.TComponent, name, isDynamic, props, handlers, slots };
 }
 
 // -----------------------------------------------------------------------------
@@ -779,60 +704,25 @@ function parseTSlot(node: Element, ctx: ParsingContext): AST | null {
   if (!node.hasAttribute("t-slot")) {
     return null;
   }
-  const name = node.getAttribute("t-slot")!;
-  node.removeAttribute("t-slot");
-  const attrs: { [key: string]: string } = {};
-  for (let attributeName of node.getAttributeNames()) {
-    const value = node.getAttribute(attributeName)!;
-    attrs[attributeName] = value;
-  }
   return {
     type: ASTType.TSlot,
-    name,
-    attrs,
+    name: node.getAttribute("t-slot")!,
     defaultContent: parseChildNodes(node, ctx),
   };
 }
 
-function parseTTranslation(node: Element, ctx: ParsingContext): AST | null {
-  if (node.getAttribute("t-translation") !== "off") {
-    return null;
-  }
-  node.removeAttribute("t-translation");
-  return {
-    type: ASTType.TTranslation,
-    content: parseNode(node, ctx),
-  };
-}
-
 // -----------------------------------------------------------------------------
 // helpers
 // -----------------------------------------------------------------------------
 
-/**
- * Parse all the child nodes of a given node and return a list of ast elements
- */
-function parseChildren(node: Node, ctx: ParsingContext): AST[] {
+function parseChildNodes(node: Element, ctx: ParsingContext): AST | null {
   const children: AST[] = [];
   for (let child of node.childNodes) {
     const childAst = parseNode(child, ctx);
     if (childAst) {
-      if (childAst.type === ASTType.Multi) {
-        children.push(...childAst.content);
-      } else {
-        children.push(childAst);
-      }
+      children.push(childAst);
     }
   }
-  return children;
-}
-
-/**
- * Parse all the child nodes of a given node and return an ast if possible.
- * In the case there are multiple children, they are wrapped in a astmulti.
- */
-function parseChildNodes(node: Node, ctx: ParsingContext): AST | null {
-  const children = parseChildren(node, ctx);
   switch (children.length) {
     case 0:
       return null;
@@ -842,17 +732,34 @@ function parseChildNodes(node: Node, ctx: ParsingContext): AST | null {
       return { type: ASTType.Multi, content: children };
   }
 }
+function parseXML(xml: string): Document {
+  const parser = new DOMParser();
 
-/**
- * Normalizes the content of an Element so that t-if/t-elif/t-else directives
- * immediately follow one another (by removing empty text nodes or comments).
- * Throws an error when a conditional branching statement is malformed. This
- * function modifies the Element in place.
- *
- * @param el the element containing the tree that should be normalized
- */
-function normalizeTIf(el: Element) {
-  let tbranch = el.querySelectorAll("[t-elif], [t-else]");
+  const doc = parser.parseFromString(xml, "text/xml");
+  if (doc.getElementsByTagName("parsererror").length) {
+    let msg = "Invalid XML in template.";
+    const parsererrorText = doc.getElementsByTagName("parsererror")[0].textContent;
+    if (parsererrorText) {
+      msg += "\nThe parser has produced the following error message:\n" + parsererrorText;
+      const re = /\d+/g;
+      const firstMatch = re.exec(parsererrorText);
+      if (firstMatch) {
+        const lineNumber = Number(firstMatch[0]);
+        const line = xml.split("\n")[lineNumber - 1];
+        const secondMatch = re.exec(parsererrorText);
+        if (line && secondMatch) {
+          const columnIndex = Number(secondMatch[0]) - 1;
+          if (line[columnIndex]) {
+            msg +=
+              `\nThe error might be located at xml line ${lineNumber} column ${columnIndex}\n` +
+              `${line}\n${"-".repeat(columnIndex - 1)}^`;
+          }
+        }
+      }
+    }
+    throw new Error(msg);
+  }
+  let tbranch = doc.querySelectorAll("[t-elif], [t-else]");
   for (let i = 0, ilen = tbranch.length; i < ilen; i++) {
     let node = tbranch[i];
     let prevElem = node.previousElementSibling!;
@@ -886,78 +793,6 @@ function normalizeTIf(el: Element) {
       );
     }
   }
-}
-
-/**
- * Normalizes the content of an Element so that t-esc directives on components
- * are removed and instead places a <t t-esc=""> as the default slot of the
- * component. Also throws if the component already has content. This function
- * modifies the Element in place.
- *
- * @param el the element containing the tree that should be normalized
- */
-function normalizeTEsc(el: Element) {
-  const elements = [...el.querySelectorAll("[t-esc]")].filter(
-    (el) => el.tagName[0] === el.tagName[0].toUpperCase() || el.hasAttribute("t-component")
-  );
-  for (const el of elements) {
-    if (el.childNodes.length) {
-      throw new Error("Cannot have t-esc on a component that already has content");
-    }
-    const value = el.getAttribute("t-esc");
-    el.removeAttribute("t-esc");
-    const t = el.ownerDocument.createElement("t");
-    if (value != null) {
-      t.setAttribute("t-esc", value);
-    }
-    el.appendChild(t);
-  }
-}
-
-/**
- * Normalizes the tree inside a given element and do some preliminary validation
- * on it. This function modifies the Element in place.
- *
- * @param el the element containing the tree that should be normalized
- */
-function normalizeXML(el: Element) {
-  normalizeTIf(el);
-  normalizeTEsc(el);
-}
-
-/**
- * Parses an XML string into an XML document, throwing errors on parser errors
- * instead of returning an XML document containing the parseerror.
- *
- * @param xml the string to parse
- * @returns an XML document corresponding to the content of the string
- */
-function parseXML(xml: string): XMLDocument {
-  const parser = new DOMParser();
-  const doc = parser.parseFromString(xml, "text/xml");
-  if (doc.getElementsByTagName("parsererror").length) {
-    let msg = "Invalid XML in template.";
-    const parsererrorText = doc.getElementsByTagName("parsererror")[0].textContent;
-    if (parsererrorText) {
-      msg += "\nThe parser has produced the following error message:\n" + parsererrorText;
-      const re = /\d+/g;
-      const firstMatch = re.exec(parsererrorText);
-      if (firstMatch) {
-        const lineNumber = Number(firstMatch[0]);
-        const line = xml.split("\n")[lineNumber - 1];
-        const secondMatch = re.exec(parsererrorText);
-        if (line && secondMatch) {
-          const columnIndex = Number(secondMatch[0]) - 1;
-          if (line[columnIndex]) {
-            msg +=
-              `\nThe error might be located at xml line ${lineNumber} column ${columnIndex}\n` +
-              `${line}\n${"-".repeat(columnIndex - 1)}^`;
-          }
-        }
-      }
-    }
-    throw new Error(msg);
-  }
 
   return doc;
 }

src/qweb/template_helpers.ts

@@ -0,0 +1,129 @@
+// import { compileTemplate, Template } from "./qweb/index";
+import { BDom, createBlock, html, list, multi, text, toggler } from "../blockdom";
+import { component } from "../component/component_node";
+import { Template, compileTemplate } from "./compiler";
+
+const bdom = { text, createBlock, list, multi, html, toggler, component };
+
+export const globalTemplates: { [key: string]: string } = {};
+
+function withDefault(value: any, defaultValue: any): any {
+  return value === undefined || value === null || value === false ? defaultValue : value;
+}
+
+function callSlot(
+  ctx: any,
+  parent: any,
+  key: string,
+  name: string,
+  defaultSlot?: (ctx: any, key: string) => BDom,
+  dynamic?: boolean
+): BDom | null {
+  const slots = ctx.__owl__.slots;
+  const slotFn = slots[name];
+  const slotBDom = slotFn ? slotFn(parent, key) : null;
+  if (defaultSlot) {
+    let child1: BDom | undefined = undefined;
+    let child2: BDom | undefined = undefined;
+    // const result = new BMulti(2);
+    if (slotBDom) {
+      child1 = dynamic ? toggler(name, slotBDom) : slotBDom;
+    } else {
+      child2 = defaultSlot(parent, key);
+    }
+    return multi([child1, child2]);
+  }
+  return slotBDom;
+}
+
+function capture(ctx: any): any {
+  const component = ctx.__owl__.component;
+  const result = Object.create(component);
+  for (let k in ctx) {
+    result[k] = ctx[k];
+  }
+  return result;
+}
+
+function withKey(elem: any, k: string) {
+  elem.key = k;
+  return elem;
+}
+
+function prepareList(collection: any): [any[], any[], number, any[]] {
+  let keys: any[];
+  let values: any[];
+
+  if (Array.isArray(collection)) {
+    keys = collection;
+    values = collection;
+  } else if (collection) {
+    values = Object.keys(collection);
+    keys = Object.values(collection);
+  } else {
+    throw new Error("Invalid loop expression");
+  }
+  const n = values.length;
+  return [keys, values, n, new Array(n)];
+}
+export const UTILS = {
+  // elem,
+  // setText,
+  withDefault,
+  zero: Symbol("zero"),
+  callSlot,
+  capture,
+  // toClassObj,
+  withKey,
+  prepareList,
+  shallowEqual,
+};
+
+export class TemplateSet {
+  rawTemplates: { [name: string]: string } = Object.create(globalTemplates);
+  templates: { [name: string]: Template } = {};
+  utils: typeof UTILS;
+
+  constructor() {
+    const call = (subTemplate: string, ctx: any, parent: any) => {
+      const template = this.getTemplate(subTemplate);
+      return toggler(subTemplate, template(ctx, parent));
+    };
+
+    const getTemplate = (name: string) => this.getTemplate(name);
+    this.utils = Object.assign({}, UTILS, { getTemplate, call });
+  }
+
+  addTemplate(name: string, template: string, options: { allowDuplicate?: boolean } = {}) {
+    if (name in this.rawTemplates && !options.allowDuplicate) {
+      throw new Error(`Template ${name} already defined`);
+    }
+    this.rawTemplates[name] = template;
+  }
+
+  getTemplate(name: string): Template {
+    if (!(name in this.templates)) {
+      const rawTemplate = this.rawTemplates[name];
+      if (rawTemplate === undefined) {
+        throw new Error(`Missing template: "${name}"`);
+      }
+      const templateFn = compileTemplate(rawTemplate, name);
+
+      // first add a function to lazily get the template, in case there is a
+      // recursive call to the template name
+      this.templates[name] = (context, parent) => this.templates[name](context, parent);
+      const template = templateFn(bdom, this.utils);
+      this.templates[name] = template;
+    }
+    return this.templates[name];
+  }
+}
+
+function shallowEqual(l1: any[], l2: any[]): boolean {
+  for (let i = 0, l = l1.length; i < l; i++) {
+    if (l1[i] !== l2[i]) {
+      return false;
+    }
+  }
+  return true;
+}

src/reactivity.ts

@@ -1,241 +1,144 @@
-import { onWillUnmount } from "./component/lifecycle_hooks";
-import { ComponentNode, getCurrent } from "./component/component_node";
+import { getCurrent } from "./component/component_node";
 
-// Allows to get the target of a Reactive (used for making a new Reactive from the underlying object)
-const TARGET = Symbol("Target");
-// Special key to subscribe to, to be notified of key creation/deletion
-const KEYCHANGES = Symbol("Key changes");
+export function useState<T>(state: T): T {
+  const node = getCurrent()!;
+  return observe(state, () => node.render());
+}
 
-type ObjectKey = string | number | symbol;
-type Target = object;
-type Callback = () => void;
-type Reactive<T extends Target = Target> = T & {
-  [TARGET]: any;
-};
+type CB = () => void;
+const observers: WeakMap<any, PSet<CB>> = new WeakMap();
 
 /**
- * Checks whether a given value can be made into a reactive object.
- *
- * @param value the value to check
- * @returns whether the value can be made reactive
+ * PSet (for Prototypal Set) are sets that can lookup in their "parent sets", if
+ * any.
  */
-function canBeMadeReactive(value: any): boolean {
+
+class PSet<T> extends Set<T> {
+  parent?: PSet<T>;
+
+  static createChild<T>(parent: PSet<T>): PSet<T> {
+    const pset: PSet<T> = new PSet();
+    pset.parent = parent;
+    return pset;
+  }
+
+  has(key: T): boolean {
+    if (super.has(key)) {
+      return true;
+    }
+    return this.parent ? this.parent.has(key) : false;
+  }
+
+  *[Symbol.iterator](): Generator<T> {
+    let iterator = super[Symbol.iterator]();
+    for (let elem of iterator) {
+      yield elem;
+    }
+    if (this.parent) {
+      for (let elem of this.parent) {
+        yield elem;
+      }
+    }
+  }
+}
+
+// -----------------------------------------------------------------------------
+
+export function observe<T>(value: T, cb: CB): T {
+  if (isNotObservable(value)) {
+    return value;
+  }
+  if (observers.has(value)) {
+    const callbacks = observers.get(value)!;
+    callbacks.add(cb);
+    return value;
+  }
+  const callbacks: PSet<CB> = new PSet();
+  callbacks.add(cb);
+  return observeValue(value, callbacks);
+}
+
+export function unobserve<T>(value: T, cb: () => void) {
+  if (isNotObservable(value)) {
+    return;
+  }
+  if (observers.has(value)) {
+    const callbacks = observers.get(value)!;
+    callbacks.delete(cb);
+  }
+}
+
+function isNotObservable(value: any): boolean {
   return (
-    typeof value === "object" &&
-    value !== null &&
-    !(value instanceof Date) &&
-    !(value instanceof Promise) &&
-    !(value instanceof String) &&
-    !(value instanceof Number)
+    value === null || typeof value !== "object" || value instanceof Date || value instanceof Promise
   );
 }
 
-const targetToKeysToCallbacks = new WeakMap<Target, Map<ObjectKey, Set<Callback>>>();
 /**
- * Observes a given key on a target with an callback. The callback will be
- * called when the given key changes on the target.
- *
- * @param target the target whose key should be observed
- * @param key the key to observe (or Symbol(KEYCHANGES) for key creation
- *  or deletion)
- * @param callback the function to call when the key changes
+ * value should
+ * 1. be observable
+ * 2. not yet be observed
  */
-function observeTargetKey(target: Target, key: ObjectKey, callback: Callback): void {
-  if (!targetToKeysToCallbacks.get(target)) {
-    targetToKeysToCallbacks.set(target, new Map());
-  }
-  const keyToCallbacks = targetToKeysToCallbacks.get(target)!;
-  if (!keyToCallbacks.get(key)) {
-    keyToCallbacks.set(key, new Set());
-  }
-  keyToCallbacks.get(key)!.add(callback);
-  if (!callbacksToTargets.has(callback)) {
-    callbacksToTargets.set(callback, new Set());
-  }
-  callbacksToTargets.get(callback)!.add(target);
-}
-/**
- * Notify Reactives that are observing a given target that a key has changed on
- * the target.
- *
- * @param target target whose Reactives should be notified that the target was
- *  changed.
- * @param key the key that changed (or Symbol `KEYCHANGES` if a key was created
- *   or deleted)
- */
-function notifyReactives(target: Target, key: ObjectKey): void {
-  const keyToCallbacks = targetToKeysToCallbacks.get(target);
-  if (!keyToCallbacks) {
-    return;
-  }
-  const callbacks = keyToCallbacks.get(key);
-  if (!callbacks) {
-    return;
-  }
-  // Loop on copy because clearReactivesForCallback will modify the set in place
-  for (const callback of [...callbacks]) {
-    clearReactivesForCallback(callback);
-    callback();
-  }
+function observeValue(value: any, callbacks: PSet<CB>): any {
+  const proxy = new Proxy(value as any, {
+    get(target: any, key: any): any {
+      const current = target[key];
+      if (isNotObservable(current)) {
+        return current;
+      }
+      if (observers.has(current)) {
+        // this is wrong ?
+        observers.get(current)!.parent = callbacks;
+        return current;
+      }
+      const subCallbacks = PSet.createChild(callbacks);
+      const subValue = observeValue(current, subCallbacks);
+      target[key] = subValue;
+      return subValue;
+    },
+    set(target: any, key: any, value: any): boolean {
+      // TODO: check if current !== target or proxy ??
+      const current = target[key];
+      if (current !== value) {
+        if (isNotObservable(value)) {
+          target[key] = value;
+        } else {
+          // TODO: test following scenario:
+          // 1. obj1 = observer({a:1}, somecb);
+          // 2. unobserve(obj1, somecb)
+          // 3. obj1.a = {b: 2};
+          // check that somecb was not called
+          // obj1.a.b = 3;
+          // check again that somecb was not called
+          if (observers.has(value)) {
+            const pset = observers.get(value)!;
+            pset.parent = callbacks;
+            target[key] = value;
+          } else {
+            const subCallbacks = PSet.createChild(callbacks);
+            target[key] = observeValue(value, subCallbacks);
+          }
+        }
+        notify(target);
+      }
+      return true;
+    },
+    deleteProperty(target: any, key: any) {
+      if (key in target) {
+        delete target[key];
+        notify(target);
+      }
+      return true;
+    },
+  });
+  observers.set(value, callbacks);
+  observers.set(proxy, callbacks);
+  return proxy;
 }
 
-const callbacksToTargets = new WeakMap<Callback, Set<Target>>();
-/**
- * Clears all subscriptions of the Reactives associated with a given callback.
- *
- * @param callback the callback for which the reactives need to be cleared
- */
-function clearReactivesForCallback(callback: Callback): void {
-  const targetsToClear = callbacksToTargets.get(callback);
-  if (!targetsToClear) {
-    return;
+function notify(value: any) {
+  const cbs = observers.get(value)!;
+  for (let cb of cbs) {
+    cb();
   }
-  for (const target of targetsToClear) {
-    const observedKeys = targetToKeysToCallbacks.get(target);
-    if (!observedKeys) {
-      continue;
-    }
-    for (const callbacks of observedKeys.values()) {
-      callbacks.delete(callback);
-    }
-  }
-  targetsToClear.clear();
-}
-
-const reactiveCache = new WeakMap<Target, WeakMap<Callback, Reactive>>();
-/**
- * Creates a reactive proxy for an object. Reading data on the reactive object
- * subscribes to changes to the data. Writing data on the object will cause the
- * notify callback to be called if there are suscriptions to that data. Nested
- * objects and arrays are automatically made reactive as well.
- *
- * Whenever you are notified of a change, all subscriptions are cleared, and if
- * you would like to be notified of any further changes, you should go read
- * the underlying data again. We assume that if you don't go read it again after
- * being notified, it means that you are no longer interested in that data.
- *
- * Subscriptions:
- * + Reading a property on an object will subscribe you to changes in the value
- *    of that property.
- * + Accessing an object keys (eg with Object.keys or with `for..in`) will
- *    subscribe you to the creation/deletion of keys. Checking the presence of a
- *    key on the object with 'in' has the same effect.
- * - getOwnPropertyDescriptor does not currently subscribe you to the property.
- *    This is a choice that was made because changing a key's value will trigger
- *    this trap and we do not want to subscribe by writes. This also means that
- *    Object.hasOwnProperty doesn't subscribe as it goes through this trap.
- *
- * @param target the object for which to create a reactive proxy
- * @param callback the function to call when an observed property of the
- *  reactive has changed
- * @returns a proxy that tracks changes to it
- */
-export function reactive<T extends Target>(target: T, callback: Callback = () => {}): Reactive<T> {
-  if (!canBeMadeReactive(target)) {
-    throw new Error(`Cannot make the given value reactive`);
-  }
-  const originalTarget = (target as Reactive)[TARGET];
-  if (originalTarget) {
-    return reactive(originalTarget, callback);
-  }
-  if (!reactiveCache.has(target)) {
-    reactiveCache.set(target, new Map());
-  }
-  const reactivesForTarget = reactiveCache.get(target)!;
-  if (!reactivesForTarget.has(callback)) {
-    const proxy = new Proxy(target, {
-      get(target: any, key: ObjectKey, proxy: Reactive<T>) {
-        if (key === TARGET) {
-          return target;
-        }
-        observeTargetKey(target, key, callback);
-        const value = Reflect.get(target, key, proxy);
-        if (!canBeMadeReactive(value)) {
-          return value;
-        }
-        return reactive(value, callback);
-      },
-      set(target, key, value, proxy) {
-        const isNewKey = !Object.hasOwnProperty.call(target, key);
-        const originalValue = Reflect.get(target, key, proxy);
-        const ret = Reflect.set(target, key, value, proxy);
-        if (isNewKey) {
-          notifyReactives(target, KEYCHANGES);
-        }
-        // While Array length may trigger the set trap, it's not actually set by this
-        // method but is updated behind the scenes, and the trap is not called with the
-        // new value. We disable the "same-value-optimization" for it because of that.
-        if (originalValue !== value || (Array.isArray(target) && key === "length")) {
-          notifyReactives(target, key);
-        }
-        return ret;
-      },
-      deleteProperty(target, key) {
-        const ret = Reflect.deleteProperty(target, key);
-        notifyReactives(target, KEYCHANGES);
-        notifyReactives(target, key);
-        return ret;
-      },
-      ownKeys(target) {
-        observeTargetKey(target, KEYCHANGES, callback);
-        return Reflect.ownKeys(target);
-      },
-      has(target, key) {
-        // TODO: this observes all key changes instead of only the presence of the argument key
-        observeTargetKey(target, KEYCHANGES, callback);
-        return Reflect.has(target, key);
-      },
-    });
-    reactivesForTarget.set(callback, proxy);
-  }
-  return reactivesForTarget.get(callback) as Reactive<T>;
-}
-
-/**
- * Creates a batched version of a callback so that all calls to it in the same
- * microtick will only call the original callback once.
- *
- * @param callback the callback to batch
- * @returns a batched version of the original callback
- */
-export function batched(callback: Callback): Callback {
-  let called = false;
-  return async () => {
-    // This await blocks all calls to the callback here, then releases them sequentially
-    // in the next microtick. This line decides the granularity of the batch.
-    await Promise.resolve();
-    if (!called) {
-      called = true;
-      callback();
-      // wait for all calls in this microtick to fall through before resetting "called"
-      // so that only the first call to the batched function calls the original callback
-      await Promise.resolve();
-      called = false;
-    }
-  };
-}
-
-const batchedRenderFunctions = new WeakMap<ComponentNode, Callback>();
-/**
- * Creates a reactive object that will be observed by the current component.
- * Reading data from the returned object (eg during rendering) will cause the
- * component to subscribe to that data and be rerendered when it changes.
- *
- * @param state the state to observe
- * @returns a reactive object that will cause the component to re-render on
- *  relevant changes
- * @see reactive
- */
-export function useState<T extends object>(state: T): Reactive<T> {
-  const node = getCurrent()!;
-  if (!batchedRenderFunctions.has(node)) {
-    batchedRenderFunctions.set(
-      node,
-      batched(() => node.render())
-    );
-    onWillUnmount(() => clearReactivesForCallback(render));
-  }
-  const render = batchedRenderFunctions.get(node)!;
-  const reactiveState = reactive(state, render);
-  return reactiveState;
 }

src/refs.ts

@@ -0,0 +1,36 @@
+// -----------------------------------------------------------------------------
+// useRef
+// -----------------------------------------------------------------------------
+
+import type { Component } from "./component/component";
+import { getCurrent } from "./component/component_node";
+
+/**
+ * The purpose of this hook is to allow components to get a reference to a sub
+ * html node or component.
+ */
+interface Ref<C extends Component = Component> {
+  el: HTMLElement | null;
+  comp: C | null;
+}
+
+export function useRef<C extends Component = Component>(name: string): Ref<C> {
+  const node = getCurrent()!;
+  return {
+    get el(): HTMLElement | null {
+      const val = node.refs[name];
+      return val!;
+      // if (val instanceof HTMLElement) {
+      //   return val;
+      // } else if (val instanceof Component) {
+      //   return val.el;
+      // }
+      // return null;
+    },
+    get comp(): C | null {
+      return null;
+      // const val = node.refs && node.refs[name];
+      // return val instanceof Component ? (val as C) : null;
+    },
+  };
+}

src/tags.ts

@@ -0,0 +1,14 @@
+import { globalTemplates } from "./qweb/template_helpers";
+
+// -----------------------------------------------------------------------------
+//  Global templates
+// -----------------------------------------------------------------------------
+
+export function xml(strings: TemplateStringsArray, ...args: any[]) {
+  const name = `__template__${xml.nextId++}`;
+  const value = String.raw(strings, ...args);
+  globalTemplates[name] = value;
+  return name;
+}
+
+xml.nextId = 1;

src/utils.ts

@@ -1,38 +0,0 @@
-export class EventBus extends EventTarget {
-  trigger(name: string, payload?: any) {
-    this.dispatchEvent(new CustomEvent(name, { detail: payload }));
-  }
-}
-
-export function whenReady(fn?: any): Promise<void> {
-  return new Promise(function (resolve) {
-    if (document.readyState !== "loading") {
-      resolve(true);
-    } else {
-      document.addEventListener("DOMContentLoaded", resolve, false);
-    }
-  }).then(fn || function () {});
-}
-
-export async function loadFile(url: string): Promise<string> {
-  const result = await fetch(url);
-  if (!result.ok) {
-    throw new Error("Error while fetching xml templates");
-  }
-  return await result.text();
-}
-
-/*
- * This class just transports the fact that a string is safe
- * to be injected as HTML. Overriding a JS primitive is quite painful though
- * so we need to redfine toString and valueOf.
- */
-export class Markup extends String {}
-
-/*
- * Marks a value as safe, that is, a value that can be injected as HTML directly.
- * It should be used to wrap the value passed to a t-out directive to allow a raw rendering.
- */
-export function markup(value: any) {
-  return new Markup(value);
-}

tests/__snapshots__/reactivity.test.ts.snap

@@ -1,384 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`Reactivity: useState concurrent renderings 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component } = bdom;
-  let { withDefault, getTemplate, prepareList, withKey, zero, call, callSlot, capture, isBoundary, shallowEqual, setContextValue, toNumber, safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<span><block-text-0/><block-text-1/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let d1 = ctx['context'][ctx['props'].key].n;
-    let d2 = ctx['state'].x;
-    return block1([d1, d2]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState concurrent renderings 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component } = bdom;
-  let { withDefault, getTemplate, prepareList, withKey, zero, call, callSlot, capture, isBoundary, shallowEqual, setContextValue, toNumber, safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<p><block-child-0/></p>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = component(\`ComponentC\`, {key: ctx['props'].key}, key + \`__1\`, node, ctx);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState concurrent renderings 3`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component } = bdom;
-  let { withDefault, getTemplate, prepareList, withKey, zero, call, callSlot, capture, isBoundary, shallowEqual, setContextValue, toNumber, safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = component(\`ComponentB\`, {key: ctx['context'].key}, key + \`__1\`, node, ctx);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState destroyed component before being mounted is inactive 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2;
-    if (ctx['state'].flag) {
-      b2 = component(\`Child\`, {}, key+\`__1\`,null, node, ctx);
-    }
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState destroyed component before being mounted is inactive 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<span><block-text-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let txt1 = ctx['contextObj'].a;
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState destroyed component is inactive 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2;
-    if (ctx['state'].flag) {
-      b2 = component(\`Child\`, {}, key+\`__1\`,null, node, ctx);
-    }
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState destroyed component is inactive 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<span><block-text-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let txt1 = ctx['contextObj'].a;
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState one components can subscribe twice to same context 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-text-0/><block-text-1/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let txt1 = ctx['contextObj1'].a;
-    let txt2 = ctx['contextObj2'].b;
-    return block1([txt1, txt2]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState parent and children subscribed to same context 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-child-0/><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = component(\`Child\`, {}, key+\`__1\`,null, node, ctx);
-    let txt1 = ctx['contextObj'].b;
-    return block1([txt1], [b2]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState parent and children subscribed to same context 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<span><block-text-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let txt1 = ctx['contextObj'].a;
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState several nodes on different level use same context 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component } = bdom;
-  let { withDefault, getTemplate, prepareList, withKey, zero, call, callSlot, capture, isBoundary, shallowEqual, setContextValue, toNumber, safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div><block-text-0/> <block-text-1/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let d1 = ctx['contextObj'].a;
-    let d2 = ctx['contextObj'].b;
-    return block1([d1, d2]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState several nodes on different level use same context 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component } = bdom;
-  let { withDefault, getTemplate, prepareList, withKey, zero, call, callSlot, capture, isBoundary, shallowEqual, setContextValue, toNumber, safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let d1 = ctx['contextObj'].b;
-    return block1([d1]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState several nodes on different level use same context 3`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component } = bdom;
-  let { withDefault, getTemplate, prepareList, withKey, zero, call, callSlot, capture, isBoundary, shallowEqual, setContextValue, toNumber, safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div><block-text-0/><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let d1 = ctx['contextObj'].a;
-    let b2 = component(\`L3A\`, {}, key + \`__1\`, node, ctx);
-    return block1([d1], [b2]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState several nodes on different level use same context 4`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component } = bdom;
-  let { withDefault, getTemplate, prepareList, withKey, zero, call, callSlot, capture, isBoundary, shallowEqual, setContextValue, toNumber, safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/><block-child-1/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = component(\`L2A\`, {}, key + \`__1\`, node, ctx);
-    let b3 = component(\`L2B\`, {}, key + \`__2\`, node, ctx);
-    return block1([], [b2, b3]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState two components are updated in parallel 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-child-0/><block-child-1/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = component(\`Child\`, {}, key+\`__1\`,null, node, ctx);
-    let b3 = component(\`Child\`, {}, key+\`__2\`,null, node, ctx);
-    return block1([], [b2, b3]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState two components are updated in parallel 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<span><block-text-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let txt1 = ctx['contextObj'].value;
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState two components can subscribe to same context 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-child-0/><block-child-1/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = component(\`Child\`, {}, key+\`__1\`,null, node, ctx);
-    let b3 = component(\`Child\`, {}, key+\`__2\`,null, node, ctx);
-    return block1([], [b2, b3]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState two components can subscribe to same context 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<span><block-text-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let txt1 = ctx['contextObj'].value;
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState two independent components on different levels are updated in parallel 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-child-0/><block-child-1/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = component(\`Child\`, {}, key+\`__1\`,null, node, ctx);
-    let b3 = component(\`Parent\`, {}, key+\`__2\`,null, node, ctx);
-    return block1([], [b2, b3]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState two independent components on different levels are updated in parallel 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<span><block-text-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let txt1 = ctx['contextObj'].value;
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState two independent components on different levels are updated in parallel 3`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = component(\`Child\`, {}, key+\`__1\`,null, node, ctx);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState useContext=useState hook is reactive, for one component 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let txt1 = ctx['contextObj'].value;
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState useless atoms should be deleted 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { prepareList, withKey } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/> Total: <block-text-0/> Count: <block-text-1/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    const [k_block2, v_block2, l_block2, c_block2] = prepareList(Object.keys(ctx['state']));
-    for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`id\`] = v_block2[i1];
-      let key1 = ctx['id'];
-      c_block2[i1] = withKey(component(\`Quantity\`, {id: ctx['id']}, key+\`__1__\${key1}\`,null, node, ctx), key1);
-    }
-    ctx = ctx.__proto__;
-    let b2 = list(c_block2);
-    let txt1 = ctx['total'];
-    let txt2 = Object.keys(ctx['state']).length;
-    return block1([txt1, txt2], [b2]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState useless atoms should be deleted 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let txt1 = ctx['state'].quantity;
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`Reactivity: useState very simple use, with initial value 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let txt1 = ctx['contextObj'].value;
-    return block1([txt1]);
-  }
-}"
-`;

tests/app/__snapshots__/app.test.ts.snap

@@ -1,43 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`app App supports env with getters/setters 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-text-0/> <block-text-1/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let txt1 = ctx['env'].someVal;
-    let txt2 = Object.keys(ctx['env'].services);
-    return block1([txt1, txt2]);
-  }
-}"
-`;
-
-exports[`app can configure an app with props 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let txt1 = ctx['props'].value;
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`app destroy remove the widget from the DOM 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div/>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;

tests/app/app.test.ts

@@ -1,62 +0,0 @@
-import { App, Component, xml } from "../../src";
-import { status } from "../../src/component/status";
-import { makeTestFixture, snapshotEverything, nextTick, elem } from "../helpers";
-
-let fixture: HTMLElement;
-
-snapshotEverything();
-
-beforeEach(() => {
-  fixture = makeTestFixture();
-});
-
-describe("app", () => {
-  test("destroy remove the widget from the DOM", async () => {
-    class SomeComponent extends Component {
-      static template = xml`<div/>`;
-    }
-
-    const app = new App(SomeComponent);
-    const comp = await app.mount(fixture);
-    const el = elem(comp);
-    expect(document.contains(el)).toBe(true);
-    app.destroy();
-    expect(document.contains(el)).toBe(false);
-    expect(status(comp)).toBe("destroyed");
-  });
-
-  test("App supports env with getters/setters", async () => {
-    let someVal = "maggot";
-
-    const services: any = { serv1: "" };
-    const env = {
-      get someVal() {
-        return someVal;
-      },
-      services,
-    };
-
-    class SomeComponent extends Component {
-      static template = xml`<div><t t-esc="env.someVal" /> <t t-esc="Object.keys(env.services)" /></div>`;
-    }
-
-    const app = new App(SomeComponent, { env });
-    const comp = await app.mount(fixture);
-    expect(fixture.innerHTML).toBe("<div>maggot serv1</div>");
-    someVal = "brain";
-    services.serv2 = "";
-    comp.render();
-    await nextTick();
-    expect(fixture.innerHTML).toBe("<div>brain serv1,serv2</div>");
-  });
-
-  test("can configure an app with props", async () => {
-    class SomeComponent extends Component {
-      static template = xml`<div t-esc="props.value"/>`;
-    }
-
-    const app = new App(SomeComponent, { props: { value: 333 } });
-    await app.mount(fixture);
-    expect(fixture.innerHTML).toBe("<div>333</div>");
-  });
-});

tests/blockdom/block.test.ts

@@ -227,38 +227,6 @@ describe("misc", () => {
     expect(fixture.innerHTML).toBe("<p>() =&gt; 3tostring</p>");
   });
 
-  test("block with 2 subblocks: variation", async () => {
-    const block = createBlock("<a><b><c><block-child-0/>2</c></b><block-child-1/></a>");
-    const tree = block([], [text("1"), text("3")]);
-    mount(tree, fixture);
-    expect(fixture.innerHTML).toBe("<a><b><c>12</c></b>3</a>");
-  });
-
-  test("block with 2 subblocks: another variation", async () => {
-    const block = createBlock(
-      `<a block-attribute-0="hello"><b><c><block-child-0/>2</c></b><block-child-1/></a>`
-    );
-    const tree = block(["world"], [text("1"), text("3")]);
-    mount(tree, fixture);
-    expect(fixture.innerHTML).toBe(`<a hello="world"><b><c>12</c></b>3</a>`);
-  });
-
-  test("namespace is not propagated to siblings", () => {
-    const block = createBlock(`<div><svg block-ns="someNameSpace"><g/></svg><div></div></div>`);
-
-    const fixture = makeTestFixture();
-    mount(block(), fixture);
-
-    expect(fixture.innerHTML).toBe("<div><svg><g></g></svg><div></div></div>");
-    expect(fixture.querySelector("svg")!.namespaceURI).toBe("someNameSpace");
-    expect(fixture.querySelector("g")!.namespaceURI).toBe("someNameSpace");
-    const allDivs = fixture.querySelectorAll("div");
-    expect(Array.from(allDivs).map((el) => el.namespaceURI)).toEqual([
-      "http://www.w3.org/1999/xhtml",
-      "http://www.w3.org/1999/xhtml",
-    ]);
-  });
-
   //     test.skip("reusing a block skips patching process", async () => {
   //       const block = createBlock('<div><block-text-0/></div>');
   //       const foo = block(["foo"]);

tests/blockdom/block_attributes.test.ts

@@ -26,26 +26,6 @@ test("simple attribute", async () => {
   expect(fixture.innerHTML).toBe(`<div hello="owl"></div>`);
 });
 
-test("updating attribute with falsy value", async () => {
-  const block = createBlock('<div block-attribute-0="hello"></div>');
-  const tree = block([false]);
-
-  mount(tree, fixture);
-  expect(fixture.innerHTML).toBe(`<div></div>`);
-
-  patch(tree, block(["owl"]));
-  expect(fixture.innerHTML).toBe(`<div hello="owl"></div>`);
-
-  patch(tree, block([false]));
-  expect(fixture.innerHTML).toBe(`<div></div>`);
-
-  patch(tree, block(["owl"]));
-  expect(fixture.innerHTML).toBe(`<div hello="owl"></div>`);
-
-  patch(tree, block([undefined]));
-  expect(fixture.innerHTML).toBe(`<div></div>`);
-});
-
 test("dynamic attribute (pair)", async () => {
   const block = createBlock('<div block-attributes="0"></div>');
   const tree = block([["hello", "world"]]);
@@ -57,20 +37,6 @@ test("dynamic attribute (pair)", async () => {
   expect(fixture.innerHTML).toBe(`<div ola="mundo"></div>`);
 });
 
-test("dynamic attribute (pair, with false value)", async () => {
-  const block = createBlock('<div block-attributes="0"></div>');
-  const tree = block([["hello", false]]);
-
-  mount(tree, fixture);
-  expect(fixture.innerHTML).toBe(`<div></div>`);
-
-  patch(tree, block([["hello", "world"]]));
-  expect(fixture.innerHTML).toBe(`<div hello="world"></div>`);
-
-  patch(tree, block([["hello", false]]));
-  expect(fixture.innerHTML).toBe(`<div></div>`);
-});
-
 test("dynamic attribute (object)", async () => {
   const block = createBlock('<div block-attributes="0"></div>');
   const tree = block([{ hello: "world" }]);
@@ -82,23 +48,6 @@ test("dynamic attribute (object)", async () => {
   expect(fixture.innerHTML).toBe(`<div ola="mundo"></div>`);
 });
 
-test("dynamic attribute (object), with falsy values", async () => {
-  const block = createBlock('<div block-attributes="0"></div>');
-  const tree = block([{ hello: "world", blip: false }]);
-
-  mount(tree, fixture);
-  expect(fixture.innerHTML).toBe(`<div hello="world"></div>`);
-
-  patch(tree, block([{ ola: "mundo", blip: undefined }]));
-  expect(fixture.innerHTML).toBe(`<div ola="mundo"></div>`);
-
-  patch(tree, block([{ ola: false, blip: 1 }]));
-  expect(fixture.innerHTML).toBe(`<div blip="1"></div>`);
-
-  patch(tree, block([{ ola: undefined, blip: undefined }]));
-  expect(fixture.innerHTML).toBe(`<div></div>`);
-});
-
 test("class attribute", async () => {
   const block = createBlock('<div block-attribute-0="class"></div>');
   const tree = block(["fire"]);
@@ -116,14 +65,6 @@ test("class attribute", async () => {
   expect(fixture.innerHTML).toBe(`<div class="0"></div>`);
 });
 
-test("attribute with undefined value", async () => {
-  const block = createBlock('<div block-attribute-0="abc"></div>');
-  const tree = block([undefined]);
-
-  mount(tree, fixture);
-  expect(fixture.innerHTML).toBe(`<div></div>`);
-});
-
 test("class attribute with undefined value", async () => {
   const block = createBlock('<div block-attribute-0="class"></div>');
   const tree = block([undefined]);

tests/blockdom/block_event_handling.test.ts

@@ -61,7 +61,6 @@ test("simple event handling ", async () => {
       const [owner, method] = data;
       owner[method]();
     }
-    return false;
   };
 
   const block = createBlock('<div block-handler-0="click"></div>');
@@ -107,167 +106,3 @@ test("two same block nodes with different handlers", async () => {
   (fixture.firstChild!.nextSibling as HTMLDivElement).click();
   expect(steps).toEqual(["1", "2"]);
 });
-
-test("two same block nodes with different handlers (synthetic)", async () => {
-  const block = createBlock('<div block-handler-0="click.synthetic"></div>');
-  let steps: string[] = [];
-  let handler1 = () => steps.push("1");
-  let handler2 = () => steps.push("2");
-  const tree = multi([block([handler1]), block([handler2])]);
-
-  mount(tree, fixture);
-  expect(fixture.innerHTML).toBe("<div></div><div></div>");
-
-  (fixture.firstChild as HTMLDivElement).click();
-  (fixture.firstChild!.nextSibling as HTMLDivElement).click();
-  expect(steps).toEqual(["1", "2"]);
-});
-
-test("two event handlers on same event", async () => {
-  const block = createBlock('<div block-handler-0="click" block-handler-1="click"></div>');
-  let n = 0;
-  let m = 0;
-  const tree = block([() => m++, () => n++]);
-
-  mount(tree, fixture);
-  expect(fixture.innerHTML).toBe("<div></div>");
-
-  expect(m).toBe(0);
-  expect(n).toBe(0);
-  (fixture.firstChild as HTMLDivElement).click();
-  expect(m).toBe(1);
-  expect(n).toBe(1);
-});
-
-test("two synthetic event handlers on same event", async () => {
-  const block = createBlock(
-    '<div block-handler-0="click.synthetic" block-handler-1="click.synthetic"></div>'
-  );
-  let n = 0;
-  let m = 0;
-  const tree = block([() => m++, () => n++]);
-
-  mount(tree, fixture);
-  expect(fixture.innerHTML).toBe("<div></div>");
-
-  expect(m).toBe(0);
-  expect(n).toBe(0);
-  (fixture.firstChild as HTMLDivElement).click();
-  expect(m).toBe(1);
-  expect(n).toBe(1);
-});
-
-test("synthetic and native handlers can cohabitate", async () => {
-  const block = createBlock(
-    '<div block-handler-0="click.synthetic"><div block-handler-1="click"/></div>'
-  );
-  let steps: string[] = [];
-  let handler1 = () => steps.push("1");
-  let handler2 = () => steps.push("2");
-  const tree = block([handler1, handler2]);
-
-  mount(tree, fixture);
-  expect(fixture.innerHTML).toBe("<div><div></div></div>");
-
-  (fixture.firstChild!.firstChild as HTMLDivElement).click();
-  expect(steps).toEqual(["2", "1"]);
-  (fixture.firstChild as HTMLDivElement).click();
-  expect(steps).toEqual(["2", "1", "1"]);
-});
-
-test("synthetic and native handlers can cohabitate (2)", async () => {
-  const block = createBlock(
-    '<div block-handler-0="click"><div block-handler-1="click.synthetic"/></div>'
-  );
-  let steps: string[] = [];
-  let handler1 = () => steps.push("1");
-  let handler2 = () => steps.push("2");
-  const tree = block([handler1, handler2]);
-
-  mount(tree, fixture);
-  expect(fixture.innerHTML).toBe("<div><div></div></div>");
-
-  (fixture.firstChild!.firstChild as HTMLDivElement).click();
-  expect(steps).toEqual(["1", "2"]);
-  (fixture.firstChild as HTMLDivElement).click();
-  expect(steps).toEqual(["1", "2", "1"]);
-});
-
-test("synthetic and native handlers can cohabitate (3)", async () => {
-  const parent = createBlock(`<div block-handler-0="click"><block-child-0/><block-child-1/></div>`);
-  const block = createBlock('<div block-handler-0="click"/>');
-  const blockSynth = createBlock('<div block-handler-0="click.synthetic"/>');
-  let steps: string[] = [];
-  const handler0 = () => steps.push("0");
-  let handler1 = () => steps.push("1");
-  let handler2 = () => steps.push("2");
-  const tree = parent([handler0], [block([handler1]), blockSynth([handler2])]);
-
-  mount(tree, fixture);
-  expect(fixture.innerHTML).toBe("<div><div></div><div></div></div>");
-
-  const children = fixture.children[0].children;
-
-  (children[0] as HTMLElement).click();
-  expect(steps).toEqual(["1", "0"]);
-  (children[1] as HTMLElement).click();
-  expect(steps).toEqual(["1", "0", "0", "2"]);
-});
-
-test("synthetic and native handlers can cohabitate (4)", async () => {
-  const parent = createBlock(`<div block-handler-0="click"><block-child-0/><block-child-1/></div>`);
-  const block = createBlock('<div block-handler-0="click"/>');
-  const blockSynth = createBlock('<div block-handler-0="click.synthetic"/>');
-  let steps: string[] = [];
-  const handler0 = (ev: Event) => {
-    steps.push("0");
-    ev.stopPropagation();
-  };
-  let handler1 = () => steps.push("1");
-  let handler2 = () => steps.push("2");
-  const tree = parent([handler0], [block([handler1]), blockSynth([handler2])]);
-
-  mount(tree, fixture);
-  expect(fixture.innerHTML).toBe("<div><div></div><div></div></div>");
-
-  const children = fixture.children[0].children;
-
-  (children[0] as HTMLElement).click();
-  expect(steps).toEqual(["1", "0"]);
-  (children[1] as HTMLElement).click();
-  expect(steps).toEqual(["1", "0", "0"]);
-});
-
-test("synthetic and native handlers can cohabitate (5)", async () => {
-  const block = createBlock('<div block-handler-0="click.synthetic" block-handler-1="click"/>');
-  let steps: string[] = [];
-  let handler1 = () => steps.push("1");
-  let handler2 = () => steps.push("2");
-  const tree = block([handler1, handler2]);
-
-  mount(tree, fixture);
-  expect(fixture.innerHTML).toBe("<div></div>");
-
-  (fixture.firstChild as HTMLDivElement).click();
-  expect(steps).toEqual(["2", "1"]);
-});
-
-test("synthetic and native handlers can cohabitate (6)", async () => {
-  const block = createBlock(`<div
-    block-handler-0="click.synthetic"
-    block-handler-1="click"
-    block-handler-2="click.synthetic"
-    block-handler-3="click"
-  />`);
-  let steps: string[] = [];
-  const handler1 = () => steps.push("1");
-  const handler2 = () => steps.push("2");
-  const handler3 = () => steps.push("3");
-  const handler4 = () => steps.push("4");
-  const tree = block([handler1, handler2, handler3, handler4]);
-  mount(tree, fixture);
-  expect(fixture.innerHTML).toBe("<div></div>");
-
-  (fixture.firstChild as HTMLDivElement).click();
-  expect(steps).toEqual(["2", "4", "1", "3"]);
-});

tests/blockdom/comment.test.ts

@@ -1,26 +0,0 @@
-import { comment, mount } from "../../src/blockdom";
-import { makeTestFixture } from "./helpers";
-
-//------------------------------------------------------------------------------
-// Setup and helpers
-//------------------------------------------------------------------------------
-
-let fixture: HTMLElement;
-
-beforeEach(() => {
-  fixture = makeTestFixture();
-});
-
-afterEach(() => {
-  fixture.remove();
-});
-
-test("simple comment node", async () => {
-  const tree = comment("foo");
-  expect(tree.el).toBe(undefined);
-  mount(tree, fixture);
-  expect(fixture.innerHTML).toBe("<!--foo-->");
-  expect(tree.el).not.toBe(undefined);
-  tree.remove();
-  expect(fixture.innerHTML).toBe("");
-});

tests/blockdom/multi.test.ts

@@ -76,11 +76,4 @@ describe("multi blocks", () => {
     mount(text(multi([text("a"), text("b")]) as any), fixture);
     expect(fixture.innerHTML).toBe("ab");
   });
-
-  test("multi inside a block", async () => {
-    const block = createBlock("<div><block-child-0/></div>");
-    const tree = block([], [multi([text("foo"), text("bar")])]);
-    mount(tree, fixture);
-    expect(fixture.innerHTML).toBe("<div>foobar</div>");
-  });
 });

tests/blockdom/namespace.test.ts

@@ -1,72 +0,0 @@
-import { createBlock, mount } from "../../src/blockdom";
-import { makeTestFixture } from "./helpers";
-
-//------------------------------------------------------------------------------
-// Setup and helpers
-//------------------------------------------------------------------------------
-
-const XHTML_URI = "http://www.w3.org/1999/xhtml";
-const SVG_URI = "http://www.w3.org/2000/svg";
-let fixture: HTMLElement;
-
-beforeEach(() => {
-  fixture = makeTestFixture();
-});
-
-afterEach(() => {
-  fixture.remove();
-});
-
-//------------------------------------------------------------------------------
-// Tests
-//------------------------------------------------------------------------------
-
-describe("namespace", () => {
-  test("default namespace is xhtml", () => {
-    const block = createBlock(`<tag/>`);
-    const tree = block();
-    mount(tree, fixture);
-    expect(fixture.innerHTML).toBe("<tag></tag>");
-    expect(fixture.firstElementChild!.namespaceURI).toBe(XHTML_URI);
-  });
-
-  test("namespace can be changed with block-ns", () => {
-    const block = createBlock(`<tag block-ns="${SVG_URI}"/>`);
-    const tree = block();
-    mount(tree, fixture);
-    expect(fixture.innerHTML).toBe("<tag></tag>");
-    expect(fixture.firstElementChild!.namespaceURI).toBe(SVG_URI);
-  });
-
-  test("namespace is kept for children", () => {
-    const block = createBlock(
-      `<parent block-ns="${SVG_URI}"><child><subchild/></child><child/></parent>`
-    );
-    const tree = block();
-    mount(tree, fixture);
-    expect(fixture.innerHTML).toBe(
-      "<parent><child><subchild></subchild></child><child></child></parent>"
-    );
-    const parent = fixture.firstElementChild!;
-    const child1 = parent.firstElementChild!;
-    const subchild = child1.firstElementChild!;
-    const child2 = child1.nextElementSibling!;
-    expect(parent.namespaceURI).toBe(SVG_URI);
-    expect(child1.namespaceURI).toBe(SVG_URI);
-    expect(child2.namespaceURI).toBe(SVG_URI);
-    expect(subchild.namespaceURI).toBe(SVG_URI);
-  });
-
-  test("various namespaces in same block", () => {
-    const block = createBlock(`<none><one block-ns="one"/><two block-ns="two"/></none>`);
-    const tree = block();
-    mount(tree, fixture);
-    expect(fixture.innerHTML).toBe("<none><one></one><two></two></none>");
-    const none = fixture.firstElementChild!;
-    const one = none.firstElementChild!;
-    const two = one.nextElementSibling!;
-    expect(none.namespaceURI).toBe(XHTML_URI);
-    expect(one.namespaceURI).toBe("one");
-    expect(two.namespaceURI).toBe("two");
-  });
-});

tests/blockdom/toggler.test.ts

@@ -54,61 +54,4 @@ describe("togglers", () => {
     expect(fixture.innerHTML).toBe("<p>hey</p>");
     expect(fixture.firstChild).not.toBe(textnode);
   });
-
-  test("beforeRemove is called", () => {
-    const block = createBlock("<p>hey</p>");
-
-    function blockOverriden() {
-      const vn = block();
-      vn.beforeRemove = () => {
-        steps.push("beforeRemove");
-      };
-      return vn;
-    }
-
-    const steps: string[] = [];
-    const tree = toggler("key1", blockOverriden());
-    mount(tree, fixture);
-    expect(fixture.innerHTML).toBe("<p>hey</p>");
-    patch(tree, toggler("key2", text("foo")));
-    expect(fixture.innerHTML).toBe("foo");
-
-    patch(tree, toggler("key3", blockOverriden()), true);
-    expect(fixture.innerHTML).toBe("<p>hey</p>");
-
-    patch(tree, toggler("key2", text("foo")), true);
-    expect(fixture.innerHTML).toBe("foo");
-
-    expect(steps).toEqual(["beforeRemove"]);
-  });
-
-  test("beforeRemove is called when within a block", () => {
-    const block = createBlock("<p><block-child-0/></p>");
-    const conditionalBlock = createBlock("<p>hey</p>");
-
-    const steps: string[] = [];
-
-    function blockOverriden() {
-      const vn = conditionalBlock();
-      vn.beforeRemove = function () {
-        steps.push("beforeRemove");
-      };
-      return vn;
-    }
-    const mainBlock = block([], [toggler("key1", blockOverriden())]);
-
-    mount(mainBlock, fixture);
-    expect(fixture.innerHTML).toBe("<p><p>hey</p></p>");
-
-    patch(mainBlock, block([], []));
-    expect(fixture.innerHTML).toBe("<p></p>");
-
-    patch(mainBlock, block([], [toggler("key1", blockOverriden())]), true);
-    expect(fixture.innerHTML).toBe("<p><p>hey</p></p>");
-
-    patch(mainBlock, block([], []), true);
-    expect(fixture.innerHTML).toBe("<p></p>");
-
-    expect(steps).toEqual(["beforeRemove"]);
-  });
 });

tests/compiler/__snapshots__/event_handling.test.ts.snap

@@ -1,530 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`t-on can bind event handler 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<button block-handler-0=\\"click\\">Click</button>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [ctx['add'], ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on can bind handlers with arguments 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<button block-handler-0=\\"click\\">Click</button>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const v1 = ctx['add'];
-    let hdlr1 = [()=>v1(5), ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on can bind handlers with empty  object 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<button block-handler-0=\\"click\\">Click</button>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const v1 = ctx['doSomething'];
-    let hdlr1 = [()=>v1({}), ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on can bind handlers with empty object (with non empty inner string) 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<button block-handler-0=\\"click\\">Click</button>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const v1 = ctx['doSomething'];
-    let hdlr1 = [()=>v1({}), ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on can bind handlers with empty object (with non empty inner string) 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { prepareList, withKey } = helpers;
-  
-  let block1 = createBlock(\`<ul><block-child-0/></ul>\`);
-  let block3 = createBlock(\`<li><a block-handler-0=\\"click\\">link</a></li>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    const [k_block2, v_block2, l_block2, c_block2] = prepareList(['someval']);
-    for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`action\`] = v_block2[i1];
-      ctx[\`action_index\`] = i1;
-      let key1 = ctx['action_index'];
-      const v1 = ctx['activate'];
-      const v2 = ctx['action'];
-      let hdlr1 = [()=>v1(v2), ctx];
-      c_block2[i1] = withKey(block3([hdlr1]), key1);
-    }
-    let b2 = list(c_block2);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-on can bind handlers with object arguments 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<button block-handler-0=\\"click\\">Click</button>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const v1 = ctx['add'];
-    let hdlr1 = [()=>v1({val:5}), ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on can bind two event handlers 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<button block-handler-0=\\"click\\" block-handler-1=\\"dblclick\\">Click</button>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [ctx['handleClick'], ctx];
-    let hdlr2 = [ctx['handleDblClick'], ctx];
-    return block1([hdlr1, hdlr2]);
-  }
-}"
-`;
-
-exports[`t-on handler is bound to proper owner 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<button block-handler-0=\\"click\\">Click</button>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [ctx['add'], ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on handler is bound to proper owner, part 2 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { prepareList, withKey } = helpers;
-  
-  let block2 = createBlock(\`<button block-handler-0=\\"click\\">Click</button>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    const [k_block1, v_block1, l_block1, c_block1] = prepareList([1]);
-    for (let i1 = 0; i1 < l_block1; i1++) {
-      ctx[\`value\`] = v_block1[i1];
-      let key1 = ctx['value'];
-      let hdlr1 = [ctx['add'], ctx];
-      c_block1[i1] = withKey(block2([hdlr1]), key1);
-    }
-    return list(c_block1);
-  }
-}"
-`;
-
-exports[`t-on handler is bound to proper owner, part 3 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { getTemplate } = helpers;
-  const callTemplate_1 = getTemplate(\`sub\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return callTemplate_1.call(this, ctx, node, key + \`__1\`);
-  }
-}"
-`;
-
-exports[`t-on handler is bound to proper owner, part 3 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<button block-handler-0=\\"click\\">Click</button>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [ctx['add'], ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on handler is bound to proper owner, part 4 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { prepareList, getTemplate, withKey } = helpers;
-  const callTemplate_1 = getTemplate(\`sub\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    const [k_block1, v_block1, l_block1, c_block1] = prepareList([1]);
-    for (let i1 = 0; i1 < l_block1; i1++) {
-      ctx[\`value\`] = v_block1[i1];
-      ctx[\`value_first\`] = i1 === 0;
-      ctx[\`value_last\`] = i1 === v_block1.length - 1;
-      ctx[\`value_index\`] = i1;
-      ctx[\`value_value\`] = k_block1[i1];
-      let key1 = ctx['value'];
-      c_block1[i1] = withKey(callTemplate_1.call(this, ctx, node, key + \`__1__\${key1}\`), key1);
-    }
-    return list(c_block1);
-  }
-}"
-`;
-
-exports[`t-on handler is bound to proper owner, part 4 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<button block-handler-0=\\"click\\">Click</button>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [ctx['add'], ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on receive event in first argument 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<button block-handler-0=\\"click\\">Click</button>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [ctx['add'], ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on t-on modifiers (native listener) basic support for native listener 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div class=\\"myClass\\" block-handler-0=\\"click\\"><button block-handler-1=\\"click\\">Button</button></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [ctx['divClicked'], ctx];
-    let hdlr2 = [ctx['btnClicked'], ctx];
-    return block1([hdlr1, hdlr2]);
-  }
-}"
-`;
-
-exports[`t-on t-on modifiers (native listener) t-on combined with t-esc 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><button block-handler-0=\\"click\\"><block-text-1/></button></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [ctx['onClick'], ctx];
-    let txt1 = ctx['text'];
-    return block1([hdlr1, txt1]);
-  }
-}"
-`;
-
-exports[`t-on t-on modifiers (native listener) t-on combined with t-out 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div><button block-handler-0=\\"click\\"><block-child-0/></button></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [ctx['onClick'], ctx];
-    let b2 = safeOutput(ctx['html']);
-    return block1([hdlr1], [b2]);
-  }
-}"
-`;
-
-exports[`t-on t-on modifiers (native listener) t-on with .capture modifier 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div block-handler-0=\\"click.capture\\"><button block-handler-1=\\"click\\">Button</button></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [\\"capture\\", ctx['onCapture'], ctx];
-    let hdlr2 = [ctx['doSomething'], ctx];
-    return block1([hdlr1, hdlr2]);
-  }
-}"
-`;
-
-exports[`t-on t-on modifiers (native listener) t-on with empty handler (only modifiers) 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><button block-handler-0=\\"click.prevent\\">Button</button></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [\\"prevent\\", , ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on t-on modifiers (native listener) t-on with prevent and self modifiers (order matters) 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><button block-handler-0=\\"click.prevent.self\\"><span>Button</span></button></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [\\"prevent\\",\\"self\\", ctx['onClick'], ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on t-on modifiers (native listener) t-on with prevent and/or stop modifiers 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><button block-handler-0=\\"click.prevent\\">Button 1</button><button block-handler-1=\\"click.stop\\">Button 2</button><button block-handler-2=\\"click.prevent.stop\\">Button 3</button></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [\\"prevent\\", ctx['onClickPrevented'], ctx];
-    let hdlr2 = [\\"stop\\", ctx['onClickStopped'], ctx];
-    let hdlr3 = [\\"prevent\\",\\"stop\\", ctx['onClickPreventedAndStopped'], ctx];
-    return block1([hdlr1, hdlr2, hdlr3]);
-  }
-}"
-`;
-
-exports[`t-on t-on modifiers (native listener) t-on with prevent modifier in t-foreach 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { prepareList, withKey } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block3 = createBlock(\`<a href=\\"#\\" block-handler-0=\\"click.prevent\\"> Edit <block-text-1/></a>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    const [k_block2, v_block2, l_block2, c_block2] = prepareList(ctx['projects']);
-    for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`project\`] = v_block2[i1];
-      let key1 = ctx['project'];
-      const v1 = ctx['onEdit'];
-      const v2 = ctx['project'];
-      let hdlr1 = [\\"prevent\\", ev=>v1(v2.id,ev), ctx];
-      let txt1 = ctx['project'].name;
-      c_block2[i1] = withKey(block3([hdlr1, txt1]), key1);
-    }
-    let b2 = list(c_block2);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-on t-on modifiers (native listener) t-on with self and prevent modifiers (order matters) 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><button block-handler-0=\\"click.self.prevent\\"><span>Button</span></button></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [\\"self\\",\\"prevent\\", ctx['onClick'], ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on t-on modifiers (native listener) t-on with self modifier 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><button block-handler-0=\\"click\\"><span>Button</span></button><button block-handler-1=\\"click.self\\"><span>Button</span></button></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [ctx['onClick'], ctx];
-    let hdlr2 = [\\"self\\", ctx['onClickSelf'], ctx];
-    return block1([hdlr1, hdlr2]);
-  }
-}"
-`;
-
-exports[`t-on t-on modifiers (synthetic listener) basic support for synthetic 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div block-handler-0=\\"click.synthetic\\"><button block-handler-1=\\"click.synthetic\\">Button</button></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [\\"synthetic\\", ctx['divClicked'], ctx];
-    let hdlr2 = [\\"synthetic\\", ctx['btnClicked'], ctx];
-    return block1([hdlr1, hdlr2]);
-  }
-}"
-`;
-
-exports[`t-on t-on with inline statement (function call) 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<button block-handler-0=\\"click\\">Click</button>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const v1 = ctx['state'];
-    let hdlr1 = [()=>v1.incrementCounter(2), ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on t-on with inline statement 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<button block-handler-0=\\"click\\">Click</button>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const v1 = ctx['state'];
-    let hdlr1 = [()=>v1.counter++, ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on t-on with inline statement, part 2 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<button block-handler-0=\\"click\\">Toggle</button>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const v1 = ctx['state'];
-    let hdlr1 = [()=>v1.flag=!v1.flag, ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on t-on with inline statement, part 3 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<button block-handler-0=\\"click\\">Toggle</button>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const v1 = ctx['state'];
-    const v2 = ctx['someFunction'];
-    let hdlr1 = [()=>v1.n=v2(3), ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on t-on with t-call 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { getTemplate } = helpers;
-  const callTemplate_1 = getTemplate(\`sub\`);
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-on t-on with t-call 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<p block-handler-0=\\"click\\">lucas</p>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [ctx['update'], ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-on t-on, with arguments and t-call 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { getTemplate } = helpers;
-  const callTemplate_1 = getTemplate(\`sub\`);
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-on t-on, with arguments and t-call 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<p block-handler-0=\\"click\\">lucas</p>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const v1 = ctx['value'];
-    let hdlr1 = [()=>this.update(v1), ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;

tests/compiler/__snapshots__/parser.test.ts.snap

@@ -1,3 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`qweb parser simple t-foreach expression, t-key mandatory 1`] = `"\\"Directive t-foreach should always be used with a t-key!\\" (expression: t-foreach=\\"list\\" t-as=\\"item\\")"`;

tests/compiler/__snapshots__/qweb_memory.test.ts.snap

@@ -1,24 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`memory t-foreach does not leak stuff in global scope 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { prepareList, withKey } = helpers;
-  
-  let block1 = createBlock(\`<p><block-child-0/></p>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    const [k_block2, v_block2, l_block2, c_block2] = prepareList([3,2,1]);
-    for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`item\`] = v_block2[i1];
-      ctx[\`item_index\`] = i1;
-      let key1 = ctx['item_index'];
-      c_block2[i1] = withKey(text(ctx['item']), key1);
-    }
-    let b2 = list(c_block2);
-    return block1([], [b2]);
-  }
-}"
-`;

tests/compiler/__snapshots__/svg.test.ts.snap

@@ -1,53 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`properly support svg add proper namespace to g tags 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<g block-ns=\\"http://www.w3.org/2000/svg\\"><circle cx=\\"50\\" cy=\\"50\\" r=\\"4\\" stroke=\\"green\\" stroke-width=\\"1\\" fill=\\"yellow\\"/> </g>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`properly support svg add proper namespace to svg 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<svg block-ns=\\"http://www.w3.org/2000/svg\\" width=\\"100px\\" height=\\"90px\\"><circle cx=\\"50\\" cy=\\"50\\" r=\\"4\\" stroke=\\"green\\" stroke-width=\\"1\\" fill=\\"yellow\\"/> </svg>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`properly support svg namespace to g tags not added if already in svg namespace 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<svg block-ns=\\"http://www.w3.org/2000/svg\\"><g/></svg>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`properly support svg namespace to svg tags added even if already in svg namespace 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<svg block-ns=\\"http://www.w3.org/2000/svg\\"><svg block-ns=\\"http://www.w3.org/2000/svg\\"/></svg>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;

tests/compiler/__snapshots__/t_debug_log.test.ts.snap

@@ -1,69 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`debugging t-debug 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block2 = createBlock(\`<span>hey</span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    debugger;
-    let b2;
-    if (true) {
-      debugger;
-      b2 = block2();
-    }
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`debugging t-debug on sub template 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<p>coucou</p>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    debugger;
-    return block1();
-  }
-}"
-`;
-
-exports[`debugging t-debug on sub template 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { getTemplate } = helpers;
-  const callTemplate_1 = getTemplate(\`sub\`);
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`debugging t-log 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  let block1 = createBlock(\`<div/>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"foo\\", 42);
-    console.log(ctx['foo']+3);
-    return block1();
-  }
-}"
-`;

tests/compiler/__snapshots__/t_key.test.ts.snap

@@ -1,70 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`t-key can use t-key directive on a node 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const tKey_1 = ctx['beer'].id;
-    let txt1 = ctx['beer'].name;
-    return toggler(tKey_1, block1([txt1]));
-  }
-}"
-`;
-
-exports[`t-key can use t-key directive on a node 2 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const tKey_1 = ctx['beer'].id;
-    let txt1 = ctx['beer'].name;
-    return toggler(tKey_1, block1([txt1]));
-  }
-}"
-`;
-
-exports[`t-key can use t-key directive on a node as a function 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const tKey_1 = ctx['getKey'](ctx['beer']);
-    let txt1 = ctx['beer'].name;
-    return toggler(tKey_1, block1([txt1]));
-  }
-}"
-`;
-
-exports[`t-key t-key directive in a list 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { prepareList, withKey } = helpers;
-  
-  let block1 = createBlock(\`<ul><block-child-0/></ul>\`);
-  let block3 = createBlock(\`<li><block-text-0/></li>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    const [k_block2, v_block2, l_block2, c_block2] = prepareList(ctx['beers']);
-    for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`beer\`] = v_block2[i1];
-      let key1 = ctx['beer'].id;
-      let txt1 = ctx['beer'].name;
-      c_block2[i1] = withKey(block3([txt1]), key1);
-    }
-    let b2 = list(c_block2);
-    return block1([], [b2]);
-  }
-}"
-`;

tests/compiler/__snapshots__/t_out.test.ts.snap

@@ -1,438 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`t-out literal 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<span><block-child-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = safeOutput('ok');
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-out literal, no outside html element 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return safeOutput('ok');
-  }
-}"
-`;
-
-exports[`t-out multiple calls to t-out 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, zero, getTemplate } = helpers;
-  const callTemplate_1 = getTemplate(\`sub\`);
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block2 = createBlock(\`<span>coucou</span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1;
-    let b2 = block2();
-    ctx[zero] = b2;
-    let b3 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
-    return block1([], [b3]);
-  }
-}"
-`;
-
-exports[`t-out multiple calls to t-out 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { zero } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/><div>Greeter</div><block-child-1/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = ctx[zero];
-    let b3 = ctx[zero];
-    return block1([], [b2, b3]);
-  }
-}"
-`;
-
-exports[`t-out not escaping 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = safeOutput(ctx['var']);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-out t-out 0 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, zero, getTemplate } = helpers;
-  const callTemplate_1 = getTemplate(\`_basic-callee\`);
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block2 = createBlock(\`<div>zero</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1;
-    let b2 = block2();
-    ctx[zero] = b2;
-    let b3 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
-    return block1([], [b3]);
-  }
-}"
-`;
-
-exports[`t-out t-out 0 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { zero } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = ctx[zero];
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-out t-out and another sibling node 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<span><span>hello</span><block-child-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = safeOutput(ctx['var']);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-out t-out bdom 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, LazyValue, safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div><span><block-child-0/></span></div>\`);
-  let block2 = createBlock(\`<ol>set</ol>\`);
-  
-  function value1(ctx, node, key = \\"\\") {
-    return block2();
-  }
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    ctx[\`var\`] = new LazyValue(value1, ctx, node);
-    let b3 = safeOutput(ctx['var']);
-    return block1([], [b3]);
-  }
-}"
-`;
-
-exports[`t-out t-out block 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<span><block-child-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = safeOutput(ctx['bdom']);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-out t-out escaped 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<span><block-child-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = safeOutput(ctx['var']);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-out t-out markedup 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<span><block-child-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = safeOutput(ctx['var']);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-out t-out on a node with a body, as a default 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput, withDefault } = helpers;
-  
-  let block1 = createBlock(\`<span><block-child-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b3 = text(\`nope\`);
-    let b2 = withDefault(safeOutput(ctx['var']), b3);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-out t-out on a node with a dom node in body, as a default 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput, withDefault } = helpers;
-  
-  let block1 = createBlock(\`<span><block-child-0/></span>\`);
-  let block3 = createBlock(\`<div>nope</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b3 = block3();
-    let b2 = withDefault(safeOutput(ctx['var']), b3);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-out t-out switch escaped 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<span><block-child-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = safeOutput(ctx['var']);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-out t-out switch escaped on markup 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<span><block-child-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = safeOutput(ctx['var']);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-out t-out switch markup 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<span><block-child-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = safeOutput(ctx['var']);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-out t-out switch markup on bdom 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, LazyValue, safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/><block-child-1/></div>\`);
-  let block2 = createBlock(\`<ol>set</ol>\`);
-  let block3 = createBlock(\`<span><block-child-0/></span>\`);
-  let block5 = createBlock(\`<span><block-child-0/></span>\`);
-  
-  function value1(ctx, node, key = \\"\\") {
-    return block2();
-  }
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    let b3,b5;
-    ctx[\`bdom\`] = new LazyValue(value1, ctx, node);
-    if (ctx['hasBdom']) {
-      let b4 = safeOutput(ctx['bdom']);
-      b3 = block3([], [b4]);
-    } else {
-      let b6 = safeOutput(ctx['var']);
-      b5 = block5([], [b6]);
-    }
-    return block1([], [b3, b5]);
-  }
-}"
-`;
-
-exports[`t-out t-out switch markup on escaped 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<span><block-child-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = safeOutput(ctx['var']);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-out t-out with a <t/> in body 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return safeOutput(ctx['var']);
-  }
-}"
-`;
-
-exports[`t-out t-out with arbitrary object 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = safeOutput(ctx['var']);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-out t-out with arbitrary object 2 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = safeOutput(ctx['var']);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-out t-out with comment 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<span><block-child-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = safeOutput(ctx['var']);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-out t-out with just a t-set t-value in body 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return safeOutput(ctx['var']);
-  }
-}"
-`;
-
-exports[`t-out variable 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<span><block-child-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = safeOutput(ctx['var']);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-raw is deprecated should warn 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = safeOutput(ctx['var']);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-raw is deprecated t-out is actually called in t-raw's place 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = safeOutput(ctx['var']);
-    return block1([], [b2]);
-  }
-}"
-`;

tests/compiler/__snapshots__/t_set.test.ts.snap

@@ -1,616 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`t-set evaluate value expression 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"value\\", 1+2);
-    let txt1 = ctx['value'];
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`t-set evaluate value expression, part 2 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"value\\", ctx['somevariable']+2);
-    let txt1 = ctx['value'];
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`t-set set from attribute literal (no outside div) 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"value\\", 'ok');
-    return text(ctx['value']);
-  }
-}"
-`;
-
-exports[`t-set set from attribute literal 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"value\\", 'ok');
-    let txt1 = ctx['value'];
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`t-set set from attribute lookup 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"stuff\\", ctx['value']);
-    let txt1 = ctx['stuff'];
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`t-set set from body literal 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"value\\", \`ok\`);
-    return text(ctx['value']);
-  }
-}"
-`;
-
-exports[`t-set set from body lookup 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, LazyValue } = helpers;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  function value1(ctx, node, key = \\"\\") {
-    return text(ctx['value']);
-  }
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    ctx[\`stuff\`] = new LazyValue(value1, ctx, node);
-    let txt1 = ctx['stuff'];
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`t-set set from empty body 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"stuff\\", null);
-    let txt1 = ctx['stuff'];
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`t-set t-set and t-if 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    let b2;
-    setContextValue(ctx, \\"v\\", ctx['value']);
-    if (ctx['v']==='ok') {
-      b2 = text(\`grimbergen\`);
-    }
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-set t-set body is evaluated immediately 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue, LazyValue, safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block2 = createBlock(\`<span><block-text-0/></span>\`);
-  
-  function value1(ctx, node, key = \\"\\") {
-    let txt1 = ctx['v1'];
-    return block2([txt1]);
-  }
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"v1\\", 'before');
-    ctx[\`v2\`] = new LazyValue(value1, ctx, node);
-    setContextValue(ctx, \\"v1\\", 'after');
-    let b3 = safeOutput(ctx['v2']);
-    return block1([], [b3]);
-  }
-}"
-`;
-
-exports[`t-set t-set can't alter from within callee 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue, getTemplate } = helpers;
-  const callTemplate_1 = getTemplate(\`sub\`);
-  
-  let block1 = createBlock(\`<div><p><block-text-0/></p><block-child-0/><p><block-text-1/></p></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"iter\\", 'source');
-    let txt1 = ctx['iter'];
-    let b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
-    let txt2 = ctx['iter'];
-    return block1([txt1, txt2], [b2]);
-  }
-}"
-`;
-
-exports[`t-set t-set can't alter from within callee 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  let block1 = createBlock(\`<div><block-text-0/><block-text-1/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    let txt1 = ctx['iter'];
-    setContextValue(ctx, \\"iter\\", 'called');
-    let txt2 = ctx['iter'];
-    return block1([txt1, txt2]);
-  }
-}"
-`;
-
-exports[`t-set t-set can't alter in t-call body 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue, getTemplate } = helpers;
-  const callTemplate_1 = getTemplate(\`sub\`);
-  
-  let block1 = createBlock(\`<div><p><block-text-0/></p><block-child-0/><p><block-text-1/></p></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"iter\\", 'source');
-    let txt1 = ctx['iter'];
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1;
-    setContextValue(ctx, \\"iter\\", 'inCall');
-    let b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
-    ctx = ctx.__proto__;
-    let txt2 = ctx['iter'];
-    return block1([txt1, txt2], [b2]);
-  }
-}"
-`;
-
-exports[`t-set t-set can't alter in t-call body 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  let block1 = createBlock(\`<div><block-text-0/><block-text-1/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    let txt1 = ctx['iter'];
-    setContextValue(ctx, \\"iter\\", 'called');
-    let txt2 = ctx['iter'];
-    return block1([txt1, txt2]);
-  }
-}"
-`;
-
-exports[`t-set t-set does not modify render context existing key values 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"value\\", 35);
-    let txt1 = ctx['value'];
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`t-set t-set evaluates an expression only once 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  let block1 = createBlock(\`<div><block-text-0/><block-text-1/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"v\\", ctx['value']+' artois');
-    let txt1 = ctx['v'];
-    let txt2 = ctx['v'];
-    return block1([txt1, txt2]);
-  }
-}"
-`;
-
-exports[`t-set t-set outside modified in t-foreach 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue, prepareList, withKey } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/><p>EndLoop: <block-text-0/></p></div>\`);
-  let block3 = createBlock(\`<p>InLoop: <block-text-0/></p>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"iter\\", 0);
-    ctx = Object.create(ctx);
-    const [k_block2, v_block2, l_block2, c_block2] = prepareList(['a','b']);
-    for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`val\`] = v_block2[i1];
-      let key1 = ctx['val'];
-      let txt1 = ctx['iter'];
-      c_block2[i1] = withKey(block3([txt1]), key1);
-      setContextValue(ctx, \\"iter\\", ctx['iter']+1);
-    }
-    ctx = ctx.__proto__;
-    let b2 = list(c_block2);
-    let txt2 = ctx['iter'];
-    return block1([txt2], [b2]);
-  }
-}"
-`;
-
-exports[`t-set t-set outside modified in t-foreach increment-after operator 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue, prepareList, withKey } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/><p>EndLoop: <block-text-0/></p></div>\`);
-  let block3 = createBlock(\`<p>InLoop: <block-text-0/></p>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"iter\\", 0);
-    ctx = Object.create(ctx);
-    const [k_block2, v_block2, l_block2, c_block2] = prepareList(['a','b']);
-    for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`val\`] = v_block2[i1];
-      let key1 = ctx['val'];
-      let txt1 = ctx['iter'];
-      c_block2[i1] = withKey(block3([txt1]), key1);
-      setContextValue(ctx, \\"iter\\", ctx['iter']++);
-    }
-    ctx = ctx.__proto__;
-    let b2 = list(c_block2);
-    let txt2 = ctx['iter'];
-    return block1([txt2], [b2]);
-  }
-}"
-`;
-
-exports[`t-set t-set outside modified in t-foreach increment-before operator 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue, prepareList, withKey } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/><p>EndLoop: <block-text-0/></p></div>\`);
-  let block3 = createBlock(\`<p>InLoop: <block-text-0/></p>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"iter\\", 0);
-    ctx = Object.create(ctx);
-    const [k_block2, v_block2, l_block2, c_block2] = prepareList(['a','b']);
-    for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`val\`] = v_block2[i1];
-      let key1 = ctx['val'];
-      let txt1 = ctx['iter'];
-      c_block2[i1] = withKey(block3([txt1]), key1);
-      setContextValue(ctx, \\"iter\\", ++ctx['iter']);
-    }
-    ctx = ctx.__proto__;
-    let b2 = list(c_block2);
-    let txt2 = ctx['iter'];
-    return block1([txt2], [b2]);
-  }
-}"
-`;
-
-exports[`t-set t-set should reuse variable if possible 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue, prepareList, withKey } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block3 = createBlock(\`<div><span>v<block-text-0/></span></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"v\\", 1);
-    ctx = Object.create(ctx);
-    const [k_block2, v_block2, l_block2, c_block2] = prepareList(ctx['list']);
-    for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`elem\`] = v_block2[i1];
-      ctx[\`elem_index\`] = i1;
-      let key1 = ctx['elem_index'];
-      let txt1 = ctx['v'];
-      setContextValue(ctx, \\"v\\", ctx['elem']);
-      c_block2[i1] = withKey(block3([txt1]), key1);
-    }
-    let b2 = list(c_block2);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`t-set t-set with content and sub t-esc 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, LazyValue } = helpers;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  function value1(ctx, node, key = \\"\\") {
-    let b3 = text(ctx['beep']);
-    let b4 = text(\` boop\`);
-    return multi([b3, b4]);
-  }
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    ctx[\`setvar\`] = new LazyValue(value1, ctx, node);
-    let txt1 = ctx['setvar'];
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`t-set t-set with t-value (falsy) and body 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue, LazyValue, safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block2 = createBlock(\`<span><block-text-0/></span>\`);
-  
-  function value1(ctx, node, key = \\"\\") {
-    let txt1 = ctx['v1'];
-    return block2([txt1]);
-  }
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"v3\\", false);
-    setContextValue(ctx, \\"v1\\", 'before');
-    ctx[\`v2\`] = withDefault(ctx['v3'], new LazyValue(value1, ctx, node));
-    setContextValue(ctx, \\"v1\\", 'after');
-    setContextValue(ctx, \\"v3\\", true);
-    let b3 = safeOutput(ctx['v2']);
-    return block1([], [b3]);
-  }
-}"
-`;
-
-exports[`t-set t-set with t-value (truthy) and body 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue, LazyValue, safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block2 = createBlock(\`<span><block-text-0/></span>\`);
-  
-  function value1(ctx, node, key = \\"\\") {
-    let txt1 = ctx['v1'];
-    return block2([txt1]);
-  }
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"v3\\", 'Truthy');
-    setContextValue(ctx, \\"v1\\", 'before');
-    ctx[\`v2\`] = withDefault(ctx['v3'], new LazyValue(value1, ctx, node));
-    setContextValue(ctx, \\"v1\\", 'after');
-    setContextValue(ctx, \\"v3\\", false);
-    let b3 = safeOutput(ctx['v2']);
-    return block1([], [b3]);
-  }
-}"
-`;
-
-exports[`t-set t-set, t-if, and mix of expression/body lookup, 1 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/><block-child-0/><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    if (ctx['flag']) {
-      setContextValue(ctx, \\"ourvar\\", \`1\`);
-    } else {
-      setContextValue(ctx, \\"ourvar\\", 0);
-    }
-    let txt1 = ctx['ourvar'];
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`t-set t-set, t-if, and mix of expression/body lookup, 2 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/><block-child-0/><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    if (ctx['flag']) {
-      setContextValue(ctx, \\"ourvar\\", 1);
-    } else {
-      setContextValue(ctx, \\"ourvar\\", \`0\`);
-    }
-    let txt1 = ctx['ourvar'];
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`t-set t-set, t-if, and mix of expression/body lookup, 3 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    let b2;
-    if (ctx['flag']) {
-      setContextValue(ctx, \\"ourvar\\", 1);
-    } else {
-      setContextValue(ctx, \\"ourvar\\", \`0\`);
-    }
-    b2 = text(ctx['ourvar']);
-    return multi([b2]);
-  }
-}"
-`;
-
-exports[`t-set value priority (with non text body 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, LazyValue } = helpers;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  let block2 = createBlock(\`<span>2</span>\`);
-  
-  function value1(ctx, node, key = \\"\\") {
-    return block2();
-  }
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    ctx[\`value\`] = withDefault(1, new LazyValue(value1, ctx, node));
-    let txt1 = ctx['value'];
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`t-set value priority 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  let block1 = createBlock(\`<div><block-text-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"value\\", withDefault(1, \`2\`));
-    let txt1 = ctx['value'];
-    return block1([txt1]);
-  }
-}"
-`;

tests/compiler/__snapshots__/t_tag.test.ts.snap

@@ -1,120 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`qweb t-tag can fallback if falsy tag 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = tag => createBlock(\`<\${tag || 'fallback'}/>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let tag1 = ctx['tag'];
-    return toggler(tag1, block1(tag1)());
-  }
-}"
-`;
-
-exports[`qweb t-tag can update 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = tag => createBlock(\`<\${tag || 't'}/>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let tag1 = ctx['tag'];
-    return toggler(tag1, block1(tag1)());
-  }
-}"
-`;
-
-exports[`qweb t-tag simple usecases 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = tag => createBlock(\`<\${tag || 't'}/>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let tag1 = 'div';
-    return toggler(tag1, block1(tag1)());
-  }
-}"
-`;
-
-exports[`qweb t-tag simple usecases 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = tag => createBlock(\`<\${tag || 't'}>text</\${tag || 't'}>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let tag1 = ctx['tag'];
-    return toggler(tag1, block1(tag1)());
-  }
-}"
-`;
-
-exports[`qweb t-tag with multiple attributes 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = tag => createBlock(\`<\${tag || 't'} class=\\"blueberry\\" taste=\\"raspberry\\">gooseberry</\${tag || 't'}>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let tag1 = ctx['tag'];
-    return toggler(tag1, block1(tag1)());
-  }
-}"
-`;
-
-exports[`qweb t-tag with multiple child nodes 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = tag => createBlock(\`<\${tag || 't'}> pear <span>apple</span> strawberry </\${tag || 't'}>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let tag1 = ctx['tag'];
-    return toggler(tag1, block1(tag1)());
-  }
-}"
-`;
-
-exports[`qweb t-tag with multiple t-tag in same template 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = tag => createBlock(\`<\${tag || 't'}><block-child-0/></\${tag || 't'}>\`);
-  let block2 = tag => createBlock(\`<\${tag || 't'}>baz</\${tag || 't'}>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let tag1 = ctx['outer'];
-    let tag2 = ctx['inner'];
-    let b2 = toggler(tag2, block2(tag2)());
-    return toggler(tag1, block1(tag1)([], [b2]));
-  }
-}"
-`;
-
-exports[`qweb t-tag with multiple t-tag in same template, part 2 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block2 = tag => createBlock(\`<\${tag || 't'}>bar</\${tag || 't'}>\`);
-  let block3 = tag => createBlock(\`<\${tag || 't'}>baz</\${tag || 't'}>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let tag1 = ctx['brother'];
-    let b2 = toggler(tag1, block2(tag1)());
-    let tag2 = ctx['brother'];
-    let b3 = toggler(tag2, block3(tag2)());
-    return multi([b2, b3]);
-  }
-}"
-`;

tests/compiler/__snapshots__/template_set.test.ts.snap

@@ -1,91 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`loading templates can initialize qweb with a string 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>jupiler</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`loading templates can initialize qweb with an XMLDocument 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>jupiler</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`loading templates can load a few templates from a xml string 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { getTemplate } = helpers;
-  const callTemplate_1 = getTemplate(\`items\`);
-  
-  let block1 = createBlock(\`<ul><block-child-0/></ul>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`loading templates can load a few templates from a xml string 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block2 = createBlock(\`<li>ok</li>\`);
-  let block3 = createBlock(\`<li>foo</li>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = block2();
-    let b3 = block3();
-    return multi([b2, b3]);
-  }
-}"
-`;
-
-exports[`loading templates can load a few templates from an XMLDocument 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { getTemplate } = helpers;
-  const callTemplate_1 = getTemplate(\`items\`);
-  
-  let block1 = createBlock(\`<ul><block-child-0/></ul>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`loading templates can load a few templates from an XMLDocument 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block2 = createBlock(\`<li>ok</li>\`);
-  let block3 = createBlock(\`<li>foo</li>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2 = block2();
-    let b3 = block3();
-    return multi([b2, b3]);
-  }
-}"
-`;

tests/compiler/__snapshots__/translation.test.ts.snap

@@ -1,66 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`translation support can set translatable attributes 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div tomato=\\"word\\" potato=\\"mot\\" title=\\"word\\">text</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`translation support can translate node content 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>mot</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`translation support does not translate node content if disabled 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><span>mot</span><span>word</span></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`translation support some attributes are translated 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><p label=\\"mot\\">mot</p><p title=\\"mot\\">mot</p><p placeholder=\\"mot\\">mot</p><p alt=\\"mot\\">mot</p><p something=\\"word\\">mot</p></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`translation support translation is done on the trimmed text, with extra spaces readded after 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<div> mot </div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;

tests/compiler/error_handling.test.ts

@@ -1,42 +0,0 @@
-import { renderToString, snapshotEverything, TestContext } from "../helpers";
-
-snapshotEverything();
-
-describe("error handling", () => {
-  test("invalid xml", () => {
-    expect(() => renderToString("<div>")).toThrow("Invalid XML in template");
-  });
-
-  test("nice warning if no template with given name", () => {
-    const context = new TestContext();
-    expect(() => context.renderToString("invalidname")).toThrow("Missing template");
-  });
-
-  test("cannot add twice the same template", () => {
-    const context = new TestContext();
-    context.addTemplate("test", `<t></t>`);
-    expect(() => context.addTemplate("test", "<div/>", { allowDuplicate: true })).not.toThrow(
-      "already defined"
-    );
-    expect(() => context.addTemplate("test", "<div/>")).toThrow("already defined");
-  });
-
-  test("addTemplates throw if parser error", () => {
-    const context = new TestContext();
-    expect(() => {
-      context.addTemplates("<templates><abc>></templates>");
-    }).toThrow("Invalid XML in template");
-  });
-
-  test("nice error when t-on is evaluated with a missing event", () => {
-    expect(() => renderToString(`<div t-on="somemethod"></div>`)).toThrow(
-      "Missing event name with t-on directive"
-    );
-  });
-
-  test("error when unknown directive", () => {
-    expect(() => renderToString(`<div t-best-beer="rochefort 10">test</div>`)).toThrow(
-      "Unknown QWeb directive: 't-best-beer'"
-    );
-  });
-});

tests/compiler/event_handling.test.ts

@@ -1,567 +0,0 @@
-import { TemplateSet } from "../../src/app/template_set";
-import { mount } from "../../src/blockdom";
-import { makeTestFixture, renderToBdom, renderToString, snapshotEverything } from "../helpers";
-import { markup } from "../../src/utils";
-
-snapshotEverything();
-// -----------------------------------------------------------------------------
-// t-on
-// -----------------------------------------------------------------------------
-
-describe("t-on", () => {
-  function mountToFixture(template: string, ctx: any = {}, node?: any): HTMLDivElement {
-    if (!node) {
-      node = { component: ctx };
-      ctx.__owl__ = node;
-    }
-    const block = renderToBdom(template, ctx, node);
-    const fixture = makeTestFixture();
-
-    mount(block, fixture);
-    return fixture;
-  }
-
-  test("can bind event handler", () => {
-    const template = `<button t-on-click="add">Click</button>`;
-    let a = 1;
-    const fixture = mountToFixture(template, { add: () => (a = 3) });
-    expect(a).toBe(1);
-    fixture.querySelector("button")!.click();
-    expect(a).toBe(3);
-  });
-
-  test("receive event in first argument", () => {
-    expect.assertions(2);
-    const template = `<button t-on-click="add">Click</button>`;
-    const fixture = mountToFixture(template, {
-      add: (ev: any) => {
-        expect(ev).toBeInstanceOf(Event);
-      },
-    });
-    fixture.querySelector("button")!.click();
-  });
-
-  test("can bind two event handlers", () => {
-    const template = `
-        <button t-on-click="handleClick" t-on-dblclick="handleDblClick">Click</button>`;
-    let steps: string[] = [];
-    const fixture = mountToFixture(template, {
-      handleClick() {
-        steps.push("click");
-      },
-      handleDblClick() {
-        steps.push("dblclick");
-      },
-    });
-    expect(steps).toEqual([]);
-    fixture.querySelector("button")!.click();
-    expect(steps).toEqual(["click"]);
-    fixture.querySelector("button")!.dispatchEvent(new Event("dblclick", { bubbles: true }));
-    expect(steps).toEqual(["click", "dblclick"]);
-  });
-
-  test("can bind handlers with arguments", () => {
-    const template = `<button t-on-click="() => add(5)">Click</button>`;
-    let a = 1;
-    const fixture = mountToFixture(template, { add: (n: number) => (a = a + n) });
-    expect(a).toBe(1);
-    fixture.querySelector("button")!.click();
-    expect(a).toBe(6);
-  });
-
-  test("can bind handlers with object arguments", () => {
-    const template = `<button t-on-click="() => add({val: 5})">Click</button>`;
-    let a = 1;
-    const fixture = mountToFixture(template, { add: ({ val }: any) => (a = a + val) });
-    expect(a).toBe(1);
-    fixture.querySelector("button")!.click();
-    expect(a).toBe(6);
-  });
-
-  test("can bind handlers with empty  object", () => {
-    expect.assertions(2);
-    const template = `<button t-on-click="() => doSomething({})">Click</button>`;
-    const fixture = mountToFixture(template, {
-      doSomething(arg: any) {
-        expect(arg).toEqual({});
-      },
-    });
-    fixture.querySelector("button")!.click();
-  });
-
-  test("can bind handlers with empty object (with non empty inner string)", () => {
-    expect.assertions(2);
-    const template = `<button t-on-click="() => doSomething({ })">Click</button>`;
-    const fixture = mountToFixture(template, {
-      doSomething(arg: any) {
-        expect(arg).toEqual({});
-      },
-    });
-    fixture.querySelector("button")!.click();
-  });
-
-  test("can bind handlers with empty object (with non empty inner string)", () => {
-    expect.assertions(2);
-    const template = `
-        <ul>
-          <li t-foreach="['someval']" t-as="action" t-key="action_index">
-            <a t-on-click="() => activate(action)">link</a>
-          </li>
-        </ul>`;
-    const fixture = mountToFixture(template, {
-      activate(action: string) {
-        expect(action).toBe("someval");
-      },
-    });
-    fixture.querySelector("a")!.click();
-  });
-
-  test("handler is bound to proper owner", () => {
-    expect.assertions(2);
-    const template = `<button t-on-click="add">Click</button>`;
-    let owner = {
-      add() {
-        expect(this).toBe(owner);
-      },
-    };
-    const fixture = mountToFixture(template, owner);
-    fixture.querySelector("button")!.click();
-  });
-
-  test("handler is bound to proper owner, part 2", () => {
-    expect.assertions(2);
-    const template = `
-        <t t-foreach="[1]" t-as="value" t-key="value">
-          <button t-on-click="add">Click</button>
-        </t>`;
-    let owner = {
-      add() {
-        expect(this).toBe(owner);
-      },
-    };
-    const fixture = mountToFixture(template, owner);
-    fixture.querySelector("button")!.click();
-  });
-
-  test("handler is bound to proper owner, part 3", () => {
-    expect.assertions(3);
-    const context = new TemplateSet();
-    const sub = `<button t-on-click="add">Click</button>`;
-    const main = `<t t-call="sub"/>`;
-    context.addTemplate("sub", sub);
-    context.addTemplate("main", main);
-
-    let owner: any = {
-      add() {
-        expect(this).toBe(owner);
-      },
-    };
-    const node = { component: owner };
-    owner.__owl__ = node;
-    const fixture = makeTestFixture();
-    const render = context.getTemplate("main");
-    const bdom = render(owner, node);
-    mount(bdom, fixture);
-    fixture.querySelector("button")!.click();
-  });
-
-  test("handler is bound to proper owner, part 4", () => {
-    expect.assertions(3);
-    const context = new TemplateSet();
-    const sub = `<button t-on-click="add">Click</button>`;
-    const main = `
-        <t t-foreach="[1]" t-as="value" t-key="value">
-          <t t-call="sub"/>
-        </t>`;
-    context.addTemplate("sub", sub);
-    context.addTemplate("main", main);
-
-    let owner: any = {
-      add() {
-        expect(this).toBe(owner);
-      },
-    };
-    const node = { component: owner };
-    owner.__owl__ = node;
-    const fixture = makeTestFixture();
-    const render = context.getTemplate("main");
-    const bdom = render(owner, node);
-    mount(bdom, fixture);
-    fixture.querySelector("button")!.click();
-  });
-
-  test("t-on with inline statement", () => {
-    const template = `<button t-on-click="() => state.counter++">Click</button>`;
-    let owner = { state: { counter: 0 } };
-    const fixture = mountToFixture(template, owner);
-    expect(owner.state.counter).toBe(0);
-    fixture.querySelector("button")!.click();
-    expect(owner.state.counter).toBe(1);
-  });
-
-  test("t-on with inline statement (function call)", () => {
-    const template = `<button t-on-click="() => state.incrementCounter(2)">Click</button>`;
-    let owner = {
-      state: {
-        counter: 0,
-        incrementCounter: (inc: number) => {
-          owner.state.counter += inc;
-        },
-      },
-    };
-    const fixture = mountToFixture(template, owner);
-    expect(owner.state.counter).toBe(0);
-    fixture.querySelector("button")!.click();
-    expect(owner.state.counter).toBe(2);
-  });
-
-  test("t-on with inline statement, part 2", () => {
-    const template = `<button t-on-click="() => state.flag = !state.flag">Toggle</button>`;
-    let owner = {
-      state: {
-        flag: true,
-      },
-    };
-    const fixture = mountToFixture(template, owner);
-    expect(owner.state.flag).toBe(true);
-    fixture.querySelector("button")!.click();
-    expect(owner.state.flag).toBe(false);
-    fixture.querySelector("button")!.click();
-    expect(owner.state.flag).toBe(true);
-  });
-
-  test("t-on with inline statement, part 3", () => {
-    const template = `<button t-on-click="() => state.n = someFunction(3)">Toggle</button>`;
-    let owner = {
-      someFunction(n: number) {
-        return n + 1;
-      },
-      state: {
-        n: 11,
-      },
-    };
-
-    const fixture = mountToFixture(template, owner);
-    expect(owner.state.n).toBe(11);
-    fixture.querySelector("button")!.click();
-    expect(owner.state.n).toBe(4);
-  });
-
-  test("t-on with t-call", async () => {
-    expect.assertions(3);
-    const app = new TemplateSet();
-    const sub = `<p t-on-click="update">lucas</p>`;
-    const main = `<div><t t-call="sub"/></div>`;
-    app.addTemplate("sub", sub);
-    app.addTemplate("main", main);
-
-    let owner: any = {
-      update() {
-        expect(this).toBe(owner);
-      },
-    };
-    const node = { component: owner };
-    owner.__owl__ = node;
-
-    const fixture = makeTestFixture();
-    const render = app.getTemplate("main");
-    const bdom = render(owner, node);
-    mount(bdom, fixture);
-    fixture.querySelector("p")!.click();
-  });
-
-  test("t-on, with arguments and t-call", async () => {
-    expect.assertions(4);
-    const app = new TemplateSet();
-    const sub = `<p t-on-click="() => this.update(value)">lucas</p>`;
-    const main = `<div><t t-call="sub"/></div>`;
-    app.addTemplate("sub", sub);
-    app.addTemplate("main", main);
-
-    let owner: any = {
-      update(val: number) {
-        expect(this).toBe(owner);
-        expect(val).toBe(444);
-      },
-      value: 444,
-    };
-
-    const node = { component: owner };
-    owner.__owl__ = node;
-
-    const fixture = makeTestFixture();
-    const render = app.getTemplate("main");
-    const bdom = render.call(owner, owner, node);
-    mount(bdom, fixture);
-    fixture.querySelector("p")!.click();
-  });
-
-  test("nice error when t-on is evaluated with a missing event", () => {
-    const template = `<div t-on="somemethod"></div>`;
-    expect(() => renderToString(template, { someMethod() {} })).toThrow(
-      "Missing event name with t-on directive"
-    );
-  });
-
-  describe("t-on modifiers (native listener)", () => {
-    test("basic support for native listener", () => {
-      const template = `<div class="myClass" t-on-click="divClicked">
-        <button t-on-click="btnClicked">Button</button>
-      </div>`;
-
-      const steps: string[] = [];
-
-      const owner = {
-        divClicked(ev: Event) {
-          expect(ev.currentTarget).toBe(div);
-          steps.push("divClicked");
-        },
-        btnClicked(ev: Event) {
-          expect(ev.currentTarget).toBe(button);
-          steps.push("btnClicked");
-        },
-      };
-      const node = mountToFixture(template, owner);
-      const div = node.querySelector(".myClass");
-      const button = (<HTMLElement>node).getElementsByTagName("button")[0];
-      button.click();
-      expect(steps).toEqual(["btnClicked", "divClicked"]);
-    });
-
-    test("t-on with prevent and/or stop modifiers", async () => {
-      expect.assertions(7);
-      const template = `<div>
-      <button t-on-click.prevent="onClickPrevented">Button 1</button>
-      <button t-on-click.stop="onClickStopped">Button 2</button>
-      <button t-on-click.prevent.stop="onClickPreventedAndStopped">Button 3</button>
-      </div>`;
-
-      let owner = {
-        onClickPrevented(e: Event) {
-          expect(e.defaultPrevented).toBe(true);
-          expect(e.cancelBubble).toBe(false);
-        },
-        onClickStopped(e: Event) {
-          expect(e.defaultPrevented).toBe(false);
-          expect(e.cancelBubble).toBe(true);
-        },
-        onClickPreventedAndStopped(e: Event) {
-          expect(e.defaultPrevented).toBe(true);
-          expect(e.cancelBubble).toBe(true);
-        },
-      };
-
-      const node = mountToFixture(template, owner);
-
-      const buttons = (<HTMLElement>node).getElementsByTagName("button");
-      buttons[0].click();
-      buttons[1].click();
-      buttons[2].click();
-    });
-
-    test("t-on with self modifier", async () => {
-      expect.assertions(2);
-      const template = `<div>
-        <button t-on-click="onClick"><span>Button</span></button>
-        <button t-on-click.self="onClickSelf"><span>Button</span></button>
-      </div>`;
-      let steps: string[] = [];
-      let owner = {
-        onClick(e: Event) {
-          steps.push("onClick");
-        },
-        onClickSelf(e: Event) {
-          steps.push("onClickSelf");
-        },
-      };
-      const node = mountToFixture(template, owner);
-
-      const buttons = (<HTMLElement>node).getElementsByTagName("button");
-      const spans = (<HTMLElement>node).getElementsByTagName("span");
-      spans[0].click();
-      spans[1].click();
-      buttons[0].click();
-      buttons[1].click();
-
-      expect(steps).toEqual(["onClick", "onClick", "onClickSelf"]);
-    });
-
-    test("t-on with self and prevent modifiers (order matters)", async () => {
-      expect.assertions(2);
-      const template = `<div>
-        <button t-on-click.self.prevent="onClick"><span>Button</span></button>
-      </div>`;
-      let steps: boolean[] = [];
-      let owner = {
-        onClick() {},
-      };
-      const node = mountToFixture(template, owner);
-      (<HTMLElement>node).addEventListener("click", function (e) {
-        steps.push(e.defaultPrevented);
-      });
-
-      const button = (<HTMLElement>node).getElementsByTagName("button")[0];
-      const span = (<HTMLElement>node).getElementsByTagName("span")[0];
-      span.click();
-      button.click();
-
-      expect(steps).toEqual([false, true]);
-    });
-
-    test("t-on with prevent and self modifiers (order matters)", async () => {
-      expect.assertions(2);
-      const template = `<div>
-        <button t-on-click.prevent.self="onClick"><span>Button</span></button>
-      </div>`;
-      let steps: boolean[] = [];
-      let owner = {
-        onClick() {},
-      };
-      const node = mountToFixture(template, owner);
-      (<HTMLElement>node).addEventListener("click", function (e) {
-        steps.push(e.defaultPrevented);
-      });
-
-      const button = (<HTMLElement>node).getElementsByTagName("button")[0];
-      const span = (<HTMLElement>node).getElementsByTagName("span")[0];
-      span.click();
-      button.click();
-
-      expect(steps).toEqual([true, true]);
-    });
-
-    test("t-on with prevent modifier in t-foreach", async () => {
-      expect.assertions(5);
-      const template = `<div>
-        <t t-foreach="projects" t-as="project" t-key="project">
-          <a href="#" t-on-click.prevent="ev => onEdit(project.id, ev)">
-            Edit <t t-esc="project.name"/>
-          </a>
-        </t>
-      </div>`;
-      const steps: string[] = [];
-      const owner = {
-        projects: [
-          { id: 1, name: "Project 1" },
-          { id: 2, name: "Project 2" },
-        ],
-
-        onEdit(projectId: string, ev: Event) {
-          expect(ev.defaultPrevented).toBe(true);
-          steps.push(projectId);
-        },
-      };
-
-      const node = mountToFixture(template, owner);
-      expect(node.innerHTML).toBe(
-        `<div><a href="#"> Edit Project 1</a><a href="#"> Edit Project 2</a></div>`
-      );
-
-      const links = node.querySelectorAll("a")!;
-      links[0].click();
-      links[1].click();
-
-      expect(steps).toEqual([1, 2]);
-    });
-
-    test("t-on with empty handler (only modifiers)", () => {
-      expect.assertions(2);
-      const template = `<div>
-        <button t-on-click.prevent="">Button</button>
-      </div>`;
-      const node = mountToFixture(template, {});
-
-      node.addEventListener("click", (e) => {
-        expect(e.defaultPrevented).toBe(true);
-      });
-
-      const button = (<HTMLElement>node).getElementsByTagName("button")[0];
-      button.click();
-    });
-
-    test("t-on combined with t-esc", async () => {
-      expect.assertions(3);
-      const template = `<div><button t-on-click="onClick" t-esc="text"/></div>`;
-      const steps: string[] = [];
-      const owner = {
-        text: "Click here",
-        onClick() {
-          steps.push("onClick");
-        },
-      };
-
-      const node = mountToFixture(template, owner);
-      expect(node.innerHTML).toBe(`<div><button>Click here</button></div>`);
-
-      node.querySelector("button")!.click();
-
-      expect(steps).toEqual(["onClick"]);
-    });
-
-    test("t-on combined with t-out", async () => {
-      expect.assertions(3);
-      const template = `<div><button t-on-click="onClick" t-out="html"/></div>`;
-      const steps: string[] = [];
-      const owner = {
-        html: markup("Click <b>here</b>"),
-        onClick() {
-          steps.push("onClick");
-        },
-      };
-
-      const node = mountToFixture(template, owner);
-      expect(node.innerHTML).toBe(`<div><button>Click <b>here</b></button></div>`);
-
-      node.querySelector("button")!.click();
-
-      expect(steps).toEqual(["onClick"]);
-    });
-
-    test("t-on with .capture modifier", () => {
-      expect.assertions(2);
-      const template = `<div t-on-click.capture="onCapture">
-        <button t-on-click="doSomething">Button</button>
-      </div>`;
-
-      const steps: string[] = [];
-      const owner = {
-        onCapture() {
-          steps.push("captured");
-        },
-        doSomething() {
-          steps.push("normal");
-        },
-      };
-      const node = mountToFixture(template, owner);
-
-      const button = (<HTMLElement>node).getElementsByTagName("button")[0];
-      button.click();
-      expect(steps).toEqual(["captured", "normal"]);
-    });
-  });
-
-  describe("t-on modifiers (synthetic listener)", () => {
-    test("basic support for synthetic", () => {
-      const template = `<div t-on-click.synthetic="divClicked">
-        <button t-on-click.synthetic="btnClicked">Button</button>
-      </div>`;
-
-      const steps: string[] = [];
-
-      const owner = {
-        divClicked(ev: Event) {
-          expect(ev.currentTarget).toBe(document);
-          steps.push("divClicked");
-        },
-        btnClicked(ev: Event) {
-          expect(ev.currentTarget).toBe(document);
-          steps.push("btnClicked");
-        },
-      };
-      const node = mountToFixture(template, owner);
-      const button = (<HTMLElement>node).getElementsByTagName("button")[0];
-      button.click();
-      expect(steps).toEqual(["btnClicked", "divClicked"]);
-    });
-  });
-});

tests/compiler/qweb_memory.test.ts

@@ -1,12 +0,0 @@
-import { renderToString, snapshotEverything } from "../helpers";
-
-snapshotEverything();
-
-describe("memory", () => {
-  test("t-foreach does not leak stuff in global scope", () => {
-    const initialNumberOfGlobals = Object.keys(window).length;
-    const template = `<p><t t-foreach="[3, 2, 1]" t-as="item" t-key="item_index"><t t-esc="item"/></t></p>`;
-    expect(renderToString(template)).toBe("<p>321</p>");
-    expect(Object.keys(window).length).toBe(initialNumberOfGlobals);
-  });
-});

tests/compiler/svg.test.ts

@@ -1,30 +0,0 @@
-import { renderToString, snapshotEverything } from "../helpers";
-
-// NB: check the snapshots to see where the SVG namespaces are added
-snapshotEverything();
-
-describe("properly support svg", () => {
-  test("add proper namespace to svg", () => {
-    const template = `<svg width="100px" height="90px"><circle cx="50" cy="50" r="4" stroke="green" stroke-width="1" fill="yellow"/> </svg>`;
-    expect(renderToString(template)).toBe(
-      `<svg width=\"100px\" height=\"90px\"><circle cx=\"50\" cy=\"50\" r=\"4\" stroke=\"green\" stroke-width=\"1\" fill=\"yellow\"></circle> </svg>`
-    );
-  });
-
-  test("add proper namespace to g tags", () => {
-    const template = `<g><circle cx="50" cy="50" r="4" stroke="green" stroke-width="1" fill="yellow"/> </g>`;
-    expect(renderToString(template)).toBe(
-      `<g><circle cx=\"50\" cy=\"50\" r=\"4\" stroke=\"green\" stroke-width=\"1\" fill=\"yellow\"></circle> </g>`
-    );
-  });
-
-  test("namespace to g tags not added if already in svg namespace", () => {
-    const template = `<svg><g/></svg>`;
-    expect(renderToString(template)).toBe(`<svg><g></g></svg>`);
-  });
-
-  test("namespace to svg tags added even if already in svg namespace", () => {
-    const template = `<svg><svg/></svg>`;
-    expect(renderToString(template)).toBe(`<svg><svg></svg></svg>`);
-  });
-});

tests/compiler/t_key.test.ts

@@ -1,46 +0,0 @@
-import { renderToString, renderToBdom, snapshotEverything, makeTestFixture } from "../helpers";
-import { mount, patch } from "../../src/blockdom/index";
-
-snapshotEverything();
-
-describe("t-key", () => {
-  test("can use t-key directive on a node", () => {
-    const template = `<div t-key="beer.id"><t t-esc="beer.name"/></div>`;
-    expect(renderToString(template, { beer: { id: 12, name: "Chimay Rouge" } })).toBe(
-      "<div>Chimay Rouge</div>"
-    );
-  });
-
-  test("can use t-key directive on a node as a function", () => {
-    const template = `<div t-key="getKey(beer)"><t t-esc="beer.name"/></div>`;
-    const getKey = (arg: any) => arg.id;
-    expect(renderToString(template, { getKey, beer: { id: 12, name: "Chimay Rouge" } })).toBe(
-      "<div>Chimay Rouge</div>"
-    );
-  });
-
-  test("can use t-key directive on a node 2", async () => {
-    const template = `<div t-key="beer.id"><t t-esc="beer.name"/></div>`;
-    const bd = renderToBdom(template, { beer: { id: 12, name: "Chimay Rouge" } });
-    const fixture = makeTestFixture();
-    await mount(bd, fixture);
-    const div = fixture.firstChild;
-
-    expect((div as HTMLElement).outerHTML).toBe("<div>Chimay Rouge</div>");
-    const bd2 = renderToBdom(template, { beer: { id: 13, name: "Chimay Rouge" } });
-    await patch(bd, bd2);
-    expect(div !== fixture.firstChild).toBeTruthy();
-    expect((div as HTMLElement).outerHTML).toBe("<div>Chimay Rouge</div>");
-  });
-
-  test("t-key directive in a list", () => {
-    const template = `<ul>
-        <li t-foreach="beers" t-as="beer" t-key="beer.id"><t t-esc="beer.name"/></li>
-       </ul>`;
-    expect(
-      renderToString(template, {
-        beers: [{ id: 12, name: "Chimay Rouge" }],
-      })
-    ).toBe("<ul><li>Chimay Rouge</li></ul>");
-  });
-});

tests/compiler/t_out.test.ts

@@ -1,239 +0,0 @@
-import {
-  renderToString,
-  renderToBdom,
-  snapshotEverything,
-  TestContext,
-  makeTestFixture,
-} from "../helpers";
-import { mount, patch } from "../../src/blockdom";
-import { createBlock } from "../../src/blockdom/index";
-import { markup } from "../../src/utils";
-
-snapshotEverything();
-
-// -----------------------------------------------------------------------------
-// t-out
-// -----------------------------------------------------------------------------
-
-describe("t-out", () => {
-  let fixture: HTMLElement;
-
-  beforeEach(() => {
-    fixture = makeTestFixture();
-  });
-
-  test("literal", () => {
-    const template = `<span><t t-out="'ok'"/></span>`;
-    expect(renderToString(template)).toBe("<span>ok</span>");
-  });
-
-  test("literal, no outside html element", () => {
-    const template = `<t t-out="'ok'"/>`;
-    expect(renderToString(template)).toBe("ok");
-  });
-
-  test("variable", () => {
-    const template = `<span><t t-out="var"/></span>`;
-    expect(renderToString(template, { var: "ok" })).toBe("<span>ok</span>");
-  });
-
-  test("not escaping", () => {
-    const template = `<div><t t-out="var"/></div>`;
-    expect(renderToString(template, { var: markup("<ok></ok>") })).toBe("<div><ok></ok></div>");
-  });
-
-  test("t-out and another sibling node", () => {
-    const template = `<span><span>hello</span><t t-out="var"/></span>`;
-    expect(renderToString(template, { var: markup("<ok>world</ok>") })).toBe(
-      "<span><span>hello</span><ok>world</ok></span>"
-    );
-  });
-
-  test("t-out with comment", () => {
-    const template = `<span><t t-out="var"/></span>`;
-    expect(renderToString(template, { var: markup("<p>text<!-- top secret --></p>") })).toBe(
-      "<span><p>text<!-- top secret --></p></span>"
-    );
-  });
-
-  test("t-out on a node with a body, as a default", () => {
-    const template = `<span t-out="var">nope</span>`;
-    expect(renderToString(template)).toBe("<span>nope</span>");
-  });
-
-  test("t-out with a <t/> in body", () => {
-    const template = `<t t-out="var"><t></t></t>`;
-    expect(renderToString(template, { var: "coucou" })).toBe("coucou");
-  });
-
-  test("t-out with just a t-set t-value in body", () => {
-    const template = `<t t-out="var"><t t-set="a" t-value="1" /></t>`;
-    expect(renderToString(template, { var: "coucou" })).toBe("coucou");
-  });
-
-  test("t-out on a node with a dom node in body, as a default", () => {
-    const template = `<span t-out="var"><div>nope</div></span>`;
-    expect(renderToString(template)).toBe("<span><div>nope</div></span>");
-  });
-
-  test("multiple calls to t-out", () => {
-    const context = new TestContext();
-    const sub = `
-        <div>
-          <t t-out="0"/>
-          <div>Greeter</div>
-          <t t-out="0"/>
-        </div>`;
-
-    const main = `
-        <div>
-          <t t-call="sub">
-            <span>coucou</span>
-          </t>
-        </div>`;
-
-    context.addTemplate("sub", sub);
-    context.addTemplate("main", main);
-    const expected =
-      "<div><div><span>coucou</span><div>Greeter</div><span>coucou</span></div></div>";
-    expect(context.renderToString("main")).toBe(expected);
-  });
-
-  test("t-out escaped", () => {
-    const template = `<span t-out="var" />`;
-    expect(renderToString(template, { var: "<div>nope</div>" })).toBe(
-      "<span>&lt;div&gt;nope&lt;/div&gt;</span>"
-    );
-  });
-
-  test("t-out markedup", () => {
-    const template = `<span t-out="var" />`;
-    expect(renderToString(template, { var: markup("<div>nope</div>") })).toBe(
-      "<span><div>nope</div></span>"
-    );
-  });
-
-  test("t-out switch escaped", () => {
-    const template = `<span t-out="var" />`;
-    const node = renderToBdom(template, { var: "<div>nope</div>" });
-    mount(node, fixture);
-
-    expect(fixture.innerHTML).toBe("<span>&lt;div&gt;nope&lt;/div&gt;</span>");
-    patch(node, renderToBdom(template, { var: "<li>yep</li>" }));
-
-    expect(fixture.innerHTML).toBe("<span>&lt;li&gt;yep&lt;/li&gt;</span>");
-  });
-
-  test("t-out switch markup", () => {
-    const template = `<span t-out="var" />`;
-    const node = renderToBdom(template, { var: markup("<div>nope</div>") });
-    mount(node, fixture);
-
-    expect(fixture.innerHTML).toBe("<span><div>nope</div></span>");
-    patch(node, renderToBdom(template, { var: markup("<li>yep</li>") }));
-
-    expect(fixture.innerHTML).toBe("<span><li>yep</li></span>");
-  });
-
-  test("t-out switch markup on escaped", () => {
-    const template = `<span t-out="var" />`;
-    const node = renderToBdom(template, { var: "<div>nope</div>" });
-    mount(node, fixture);
-
-    expect(fixture.innerHTML).toBe("<span>&lt;div&gt;nope&lt;/div&gt;</span>");
-    patch(node, renderToBdom(template, { var: markup("<li>yep</li>") }));
-
-    expect(fixture.innerHTML).toBe("<span><li>yep</li></span>");
-  });
-
-  test("t-out switch escaped on markup", () => {
-    const template = `<span t-out="var" />`;
-    const node = renderToBdom(template, { var: markup("<div>nope</div>") });
-    mount(node, fixture);
-
-    expect(fixture.innerHTML).toBe("<span><div>nope</div></span>");
-    patch(node, renderToBdom(template, { var: "<li>yep</li>" }));
-
-    expect(fixture.innerHTML).toBe("<span>&lt;li&gt;yep&lt;/li&gt;</span>");
-  });
-
-  test("t-out block", () => {
-    const block = createBlock("<div>block</div>");
-    const template = `<span t-out="bdom"/>`;
-    expect(renderToString(template, { bdom: block() })).toBe("<span><div>block</div></span>");
-  });
-
-  test("t-out bdom", () => {
-    const template = `<div><t t-set="var"><ol>set</ol></t><span t-out="var" /></div>`;
-    expect(renderToString(template)).toBe("<div><span><ol>set</ol></span></div>");
-  });
-
-  test("t-out switch markup on bdom", () => {
-    const template = `<div>
-      <t t-set="bdom"><ol>set</ol></t>
-      <t t-if="hasBdom">
-        <span t-out="bdom" />
-      </t>
-      <t t-else="">
-        <span t-out="var" />
-      </t>
-    </div>`;
-
-    const node = renderToBdom(template, { hasBdom: true, var: markup("<li>yep</li>") });
-    mount(node, fixture);
-
-    expect(fixture.innerHTML).toBe("<div><span><ol>set</ol></span></div>");
-    patch(node, renderToBdom(template, { hasBdom: false, var: markup("<li>yep</li>") }));
-
-    expect(fixture.innerHTML).toBe("<div><span><li>yep</li></span></div>");
-  });
-
-  test("t-out 0", () => {
-    const context = new TestContext();
-    context.addTemplate("_basic-callee", `<div><t t-out="0" /></div>`);
-    context.addTemplate("caller", `<div><t t-call="_basic-callee"><div>zero</div></t></div>`);
-    const node = context.getTemplate("caller")({}, null, "");
-    mount(node, fixture);
-    expect(fixture.innerHTML).toBe("<div><div><div>zero</div></div></div>");
-  });
-
-  test("t-out with arbitrary object", () => {
-    const template = `<div t-out="var" />`;
-    const node = renderToBdom(template, { var: { someKey: "someValue" } });
-    expect(() => mount(node, fixture)).toThrow();
-  });
-
-  test("t-out with arbitrary object 2", () => {
-    const template = `<div t-out="var" />`;
-    const node = renderToBdom(template, { var: ["someValue"] });
-    expect(() => mount(node, fixture)).toThrow();
-  });
-});
-
-describe("t-raw is deprecated", () => {
-  test("should warn", () => {
-    const template = `<div t-raw="var" />`;
-    const warn = console.warn;
-    const steps: string[] = [];
-    console.warn = (msg: any) => steps.push(msg);
-
-    expect(renderToString(template, { var: "<div>escaped</div>" })).toBe(
-      "<div>&lt;div&gt;escaped&lt;/div&gt;</div>"
-    );
-    expect(steps).toEqual([
-      't-raw has been deprecated in favor of t-out. If the value to render is not wrapped by the "markup" function, it will be escaped',
-    ]);
-    console.warn = warn;
-  });
-
-  test("t-out is actually called in t-raw's place", () => {
-    const template = `<div t-raw="var" />`;
-    const warn = console.warn;
-    console.warn = (msg: any) => msg;
-
-    expect(renderToString(template, { var: markup("<div>raw</div>") })).toBe(
-      "<div><div>raw</div></div>"
-    );
-    console.warn = warn;
-  });
-});

tests/compiler/t_tag.test.ts

@@ -1,69 +0,0 @@
-import { mount, patch } from "../../src/blockdom";
-import { makeTestFixture, renderToBdom, renderToString, snapshotEverything } from "../helpers";
-
-snapshotEverything();
-
-let fixture: HTMLElement;
-
-beforeEach(() => {
-  fixture = makeTestFixture();
-});
-
-afterEach(() => {
-  fixture.remove();
-});
-
-describe("qweb t-tag", () => {
-  test("simple usecases", () => {
-    expect(renderToString(`<t t-tag="'div'"></t>`)).toBe("<div></div>");
-    expect(renderToString(`<t t-tag="tag">text</t>`, { tag: "span" })).toBe("<span>text</span>");
-  });
-
-  test("with multiple child nodes", () => {
-    const template = `
-      <t t-tag="tag">
-          pear
-          <span>apple</span>
-          strawberry
-      </t>`;
-    expect(renderToString(template, { tag: "div" })).toBe(
-      "<div> pear <span>apple</span> strawberry </div>"
-    );
-  });
-
-  test("with multiple attributes", () => {
-    const template = `<t t-tag="tag" class="blueberry" taste="raspberry">gooseberry</t>`;
-    const expected = `<div class=\"blueberry\" taste=\"raspberry\">gooseberry</div>`;
-    expect(renderToString(template, { tag: "div" })).toBe(expected);
-  });
-
-  test("can fallback if falsy tag", () => {
-    const template = `<fallback t-tag="tag"/>`;
-    expect(renderToString(template, { tag: "div" })).toBe(`<div></div>`);
-    expect(renderToString(template, { tag: "" })).toBe(`<fallback></fallback>`);
-    expect(renderToString(template, { tag: undefined })).toBe(`<fallback></fallback>`);
-    expect(renderToString(template, { tag: null })).toBe(`<fallback></fallback>`);
-    expect(renderToString(template, { tag: false })).toBe(`<fallback></fallback>`);
-  });
-
-  test("with multiple t-tag in same template", () => {
-    const template = `<t t-tag="outer"><t t-tag="inner">baz</t></t>`;
-    expect(renderToString(template, { outer: "foo", inner: "bar" })).toBe(
-      `<foo><bar>baz</bar></foo>`
-    );
-  });
-
-  test("with multiple t-tag in same template, part 2", () => {
-    const template = `<t t-tag="brother">bar</t><t t-tag="brother">baz</t>`;
-    expect(renderToString(template, { brother: "foo" })).toBe(`<foo>bar</foo><foo>baz</foo>`);
-  });
-
-  test("can update", () => {
-    const template = `<t t-tag="tag"></t>`;
-    const bdom = renderToBdom(template, { tag: "yop" });
-    mount(bdom, fixture);
-    expect(fixture.innerHTML).toBe("<yop></yop>");
-    patch(bdom, renderToBdom(template, { tag: "gnap" }));
-    expect(fixture.innerHTML).toBe("<gnap></gnap>");
-  });
-});

tests/compiler/template_set.test.ts

@@ -1,70 +0,0 @@
-import { snapshotEverything, TestContext } from "../helpers";
-
-snapshotEverything();
-
-describe("loading templates", () => {
-  test("can initialize qweb with a string", () => {
-    const templates = `<?xml version="1.0" encoding="UTF-8"?>
-      <templates id="template" xml:space="preserve">
-        <div t-name="hey">jupiler</div>
-      </templates>`;
-    const context = new TestContext();
-    context.addTemplates(templates);
-    expect(context.renderToString("hey")).toBe("<div>jupiler</div>");
-  });
-
-  test("can initialize qweb with an XMLDocument", () => {
-    const data = `<?xml version="1.0" encoding="UTF-8"?>
-      <templates id="template" xml:space="preserve">
-        <div t-name="hey">jupiler</div>
-      </templates>`;
-    const xml = new DOMParser().parseFromString(data, "text/xml");
-    const context = new TestContext();
-    context.addTemplates(xml);
-    expect(context.renderToString("hey")).toBe("<div>jupiler</div>");
-  });
-
-  test("can load a few templates from a xml string", () => {
-    const data = `<?xml version="1.0" encoding="UTF-8"?>
-      <templates id="template" xml:space="preserve">
-
-        <t t-name="items"><li>ok</li><li>foo</li></t>
-
-        <ul t-name="main"><t t-call="items"/></ul>
-      </templates>`;
-    const context = new TestContext();
-    context.addTemplates(data);
-    const result = context.renderToString("main");
-    expect(result).toBe("<ul><li>ok</li><li>foo</li></ul>");
-  });
-
-  test("can load a few templates from an XMLDocument", () => {
-    const data = `<?xml version="1.0" encoding="UTF-8"?>
-      <templates id="template" xml:space="preserve">
-
-        <t t-name="items"><li>ok</li><li>foo</li></t>
-
-        <ul t-name="main"><t t-call="items"/></ul>
-      </templates>`;
-    const xml = new DOMParser().parseFromString(data, "text/xml");
-    const context = new TestContext();
-    context.addTemplates(xml);
-    const result = context.renderToString("main");
-    expect(result).toBe("<ul><li>ok</li><li>foo</li></ul>");
-  });
-
-  test("does not crash if string does not have templates", () => {
-    const data = "";
-    const context = new TestContext();
-    context.addTemplates(data);
-    expect(Object.keys(context.rawTemplates)).toEqual([]);
-  });
-
-  test("does not crash if XMLDocument does not have templates", () => {
-    const data = "";
-    const xml = new DOMParser().parseFromString(data, "text/xml");
-    const context = new TestContext();
-    context.addTemplates(xml);
-    expect(Object.keys(context.rawTemplates)).toEqual([]);
-  });
-});

tests/compiler/translation.test.ts

@@ -1,89 +0,0 @@
-import { Component, mount, xml } from "../../src";
-import { makeTestFixture, snapshotEverything } from "../helpers";
-
-let fixture: HTMLElement;
-
-snapshotEverything();
-
-beforeEach(() => {
-  fixture = makeTestFixture();
-});
-
-describe("translation support", () => {
-  test("can translate node content", async () => {
-    class SomeComponent extends Component {
-      static template = xml`<div>word</div>`;
-    }
-
-    await mount(SomeComponent, fixture, {
-      translateFn: (expr: string) => (expr === "word" ? "mot" : expr),
-    });
-    expect(fixture.innerHTML).toBe("<div>mot</div>");
-  });
-
-  test("does not translate node content if disabled", async () => {
-    class SomeComponent extends Component {
-      static template = xml`
-        <div>
-          <span>word</span>
-          <span t-translation="off">word</span>
-        </div>
-      `;
-    }
-
-    await mount(SomeComponent, fixture, {
-      translateFn: (expr: string) => (expr === "word" ? "mot" : expr),
-    });
-
-    expect(fixture.innerHTML).toBe("<div><span>mot</span><span>word</span></div>");
-  });
-
-  test("some attributes are translated", async () => {
-    class SomeComponent extends Component {
-      static template = xml`
-        <div>
-          <p label="word">word</p>
-          <p title="word">word</p>
-          <p placeholder="word">word</p>
-          <p alt="word">word</p>
-          <p something="word">word</p>
-        </div>
-      `;
-    }
-
-    await mount(SomeComponent, fixture, {
-      translateFn: (expr: string) => (expr === "word" ? "mot" : expr),
-    });
-    expect(fixture.innerHTML).toBe(
-      '<div><p label="mot">mot</p><p title="mot">mot</p><p placeholder="mot">mot</p><p alt="mot">mot</p><p something="word">mot</p></div>'
-    );
-  });
-
-  test("can set translatable attributes", async () => {
-    class SomeComponent extends Component {
-      static template = xml`
-        <div tomato="word" potato="word" title="word">text</div>
-      `;
-    }
-
-    await mount(SomeComponent, fixture, {
-      translateFn: (expr: string) => (expr === "word" ? "mot" : expr),
-      translatableAttributes: ["potato"],
-    });
-    expect(fixture.innerHTML).toBe('<div tomato="word" potato="mot" title="word">text</div>');
-  });
-
-  test("translation is done on the trimmed text, with extra spaces readded after", async () => {
-    class SomeComponent extends Component {
-      static template = xml`
-        <div> word </div>
-      `;
-    }
-
-    const translateFn = jest.fn((expr: string) => (expr === "word" ? "mot" : expr));
-
-    await mount(SomeComponent, fixture, { translateFn });
-    expect(fixture.innerHTML).toBe("<div> mot </div>");
-    expect(translateFn).toHaveBeenCalledWith("word");
-  });
-});

tests/components/__snapshots__/app.test.ts.snap

@@ -0,0 +1,15 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`app destroy remove the widget from the DOM 1`] = `
+"function anonymous(bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, component } = bdom;
+  let { withDefault, getTemplate, prepareList, withKey, zero, call, callSlot, capture, shallowEqual } = helpers;
+  
+  let block1 = createBlock(\`<div/>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;

tests/components/__snapshots__/event_handling.test.ts.snap

@@ -1,25 +1,10 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`event handling handler receive the event as argument 1`] = `
+exports[`event handling can set handler on sub component 1`] = `
 "function anonymous(bdom, helpers
 ) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  
-  let block1 = createBlock(\`<span block-handler-0=\\"click\\"><block-child-0/><block-text-1/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [ctx['inc'], ctx];
-    let b2 = component(\`Child\`, {}, key+\`__1\`,null, node, ctx);
-    let txt1 = ctx['state'].value;
-    return block1([hdlr1, txt1], [b2]);
-  }
-}"
-`;
-
-exports[`event handling handler receive the event as argument 2`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
+  let { text, createBlock, list, multi, html, toggler, component } = bdom;
+  let { withDefault, getTemplate, prepareList, withKey, zero, call, callSlot, capture, shallowEqual } = helpers;
   
   let block1 = createBlock(\`<div>simple vnode</div>\`);
   
@@ -29,28 +14,48 @@ exports[`event handling handler receive the event as argument 2`] = `
 }"
 `;
 
-exports[`event handling objects from scope are properly captured by t-on 1`] = `
+exports[`event handling can set handler on sub component 2`] = `
 "function anonymous(bdom, helpers
 ) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { prepareList, withKey } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block3 = createBlock(\`<div class=\\"item\\" block-handler-0=\\"click\\"/>\`);
+  let { text, createBlock, list, multi, html, toggler, component } = bdom;
+  let { withDefault, getTemplate, prepareList, withKey, zero, call, callSlot, capture, shallowEqual } = helpers;
+  let assign = Object.assign;
   
   return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    const [k_block2, v_block2, l_block2, c_block2] = prepareList(ctx['items']);
-    for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`item\`] = v_block2[i1];
-      let key1 = ctx['item'];
-      const v1 = ctx['onClick'];
-      const v2 = ctx['item'];
-      let hdlr1 = [ev=>v1(v2.val,ev), ctx];
-      c_block2[i1] = withKey(block3([hdlr1]), key1);
-    }
-    let b2 = list(c_block2);
-    return block1([], [b2]);
+    let h2 = [\`click\`, ctx, 'inc'];
+    let b2 = assign(component(\`Child\`, {}, key + \`__1\`, node, ctx), {handlers: [h2]});
+    let b3 = text(ctx['state'].value);
+    return multi([b2, b3]);
+  }
+}"
+`;
+
+exports[`event handling handler receive the event as argument 1`] = `
+"function anonymous(bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, component } = bdom;
+  let { withDefault, getTemplate, prepareList, withKey, zero, call, callSlot, capture, shallowEqual } = helpers;
+  
+  let block1 = createBlock(\`<div>simple vnode</div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;
+
+exports[`event handling handler receive the event as argument 2`] = `
+"function anonymous(bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, component } = bdom;
+  let { withDefault, getTemplate, prepareList, withKey, zero, call, callSlot, capture, shallowEqual } = helpers;
+  let assign = Object.assign;
+  
+  return function template(ctx, node, key = \\"\\") {
+    let h2 = [\`click\`, ctx, 'inc'];
+    let b2 = assign(component(\`Child\`, {}, key + \`__1\`, node, ctx), {handlers: [h2]});
+    let b3 = text(ctx['state'].value);
+    return multi([b2, b3]);
   }
 }"
 `;
@@ -58,40 +63,16 @@ exports[`event handling objects from scope are properly captured by t-on 1`] = `
 exports[`event handling support for callable expression in event handler 1`] = `
 "function anonymous(bdom, helpers
 ) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
+  let { text, createBlock, list, multi, html, toggler, component } = bdom;
+  let { withDefault, getTemplate, prepareList, withKey, zero, call, callSlot, capture, shallowEqual } = helpers;
   
   let block1 = createBlock(\`<div><block-text-0/><input type=\\"text\\" block-handler-1=\\"input\\"/></div>\`);
   
   return function template(ctx, node, key = \\"\\") {
-    let txt1 = ctx['state'].value;
-    let hdlr1 = [ctx['obj'].onInput, ctx];
-    return block1([txt1, hdlr1]);
-  }
-}"
-`;
-
-exports[`event handling t-on with handler bound to dynamic argument on a t-foreach 1`] = `
-"function anonymous(bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
-  let { prepareList, withKey } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block3 = createBlock(\`<div class=\\"item\\" block-handler-0=\\"click\\"/>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    const [k_block2, v_block2, l_block2, c_block2] = prepareList(ctx['items']);
-    for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`item\`] = v_block2[i1];
-      let key1 = ctx['item'];
-      const v1 = ctx['onClick'];
-      const v2 = ctx['item'];
-      let hdlr1 = [ev=>v1(v2,ev), ctx];
-      c_block2[i1] = withKey(block3([hdlr1]), key1);
-    }
-    let b2 = list(c_block2);
-    return block1([], [b2]);
+    let d1 = ctx['state'].value;
+    const v1 = ctx['obj'];
+    let d2 = (e) => {const res = (() => { return v1.onInput })(); if (typeof res === 'function') { res(e) }};
+    return block1([d1, d2]);
   }
 }"
 `;