[IMP] portal: add support for .closest modifier

It is sometimes useful in practice to be able to configure the portal so
that it looks for a target as close as possible as the portal location.
For example, in odoo, a portal may be set up in a form view that should
target the current form view. But if the form view itself is in a
dialog, it may fail, because it may find a valid target in the form view that is located
underneath.

With this commit, we add a .closest modifier to the `t-portal`
directive.

.github/workflows/deploy.yml

@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [20.x, 22.x]
+        node-version: [12.x, 14.x, 16.x]
 
     steps:
     - uses: actions/checkout@v2

.gitignore

@@ -15,7 +15,7 @@ yarn-debug.log*
 yarn-error.log*
 
 #ide's
-**/.vscode/*
+.vscode
 .idea
 
 node_modules
@@ -26,10 +26,3 @@ release-notes.md
 
 # useful in some cases
 /temp
-
-# owl-vision
-*/owl-vision/out/
-*/owl-vision/.vs/
-**/*.vsix
-!*/owl-vision/.vscode/launch.json
-!*/owl-vision/.vscode/tasks.json

doc/readme.md

@@ -47,4 +47,3 @@ Utility/helpers:
 - [`status`](reference/component.md#status-helper): utility function to get the status of a component (new, mounted or destroyed)
 - [`validate`](reference/utils.md#validate): validates if an object satisfies a specified schema
 - [`whenReady`](reference/utils.md#whenready): utility function to execute code when DOM is ready
-- [`batched`](reference/utils.md#batched): utility function to batch function calls

doc/reference/app.md

@@ -6,7 +6,6 @@
 - [API](#api)
 - [Configuration](#configuration)
 - [`mount` helper](#mount-helper)
-- [Roots](#roots)
 - [Loading templates](#loading-templates)
 
 ## Overview
@@ -62,13 +61,8 @@ The `config` object is an object with some of the following keys:
   templates (see [translations](translations.md))
 - **`templates (string | xml document)`**: all the templates that will be used by
   the components created by the application.
-- **`getTemplate ((s: string) => Element | Function | string | void)`**: a function that will be called by owl when it
-  needs a template. If undefined is returned, owl looks into the app templates.
 - **`warnIfNoStaticProps (boolean, default=false)`**: if true, Owl will log a warning
   whenever it encounters a component that does not provide a [static props description](props.md#props-validation).
-- **`customDirectives (object)`**: if given, the corresponding function on the object will be called
-  on the template custom directives: `t-custom-*` (see [Custom Directives](templates.md#custom-directives)).
-- **`globalValues (object)`**: Global object of elements available at compilations.
 
 ## `mount` helper
 
@@ -96,33 +90,6 @@ Most of the time, the `mount` helper is more convenient, but whenever one needs
 a reference to the actual Owl App, then using the `App` class directly is
 possible.
 
-## Roots
-
-An application can have multiple roots. It is sometimes useful to instantiate
-sub components in places that are not managed by Owl, such as an html editor
-with dynamic content (the Knowledge application in Odoo).
-
-To create a root, one can use the `createRoot` method, which takes two arguments:
-
-- **`Component`**: a component class (Root component of the app)
-- **`config (optional)`**: a config object that may contain a `props` object or a
-  `env` object.
-
-The `createRoot` method returns an object with a `mount` method (same API as
-the `App.mount` method), and a `destroy` method.
-
-```js
-const root = app.createRoot(MyComponent, { props: { someProps: true } });
-await root.mount(targetElement);
-
-// later
-root.destroy();
-```
-
-Note that, like with owl `App`, it is the responsibility of the code that created
-the root to properly destroy it (before it has been removed from the DOM!). Owl
-has no way of doing it itself.
-
 ## Loading templates
 
 Most applications will need to load templates whenever they start. Here is

doc/reference/component.md

@@ -357,7 +357,7 @@ cleaning operation, since the component may be destroyed before it has even been
 mounted. The `willDestroy` hook is useful in that situation, since it is always
 called.
 
-The `onWillDestroy` hook is used to register a function that will be executed at
+The `onWillUnmount` hook is used to register a function that will be executed at
 this moment:
 
 ```javascript
@@ -451,6 +451,5 @@ console.log(status(component));
 // logs either:
 // - 'new', if the component is new and has not been mounted yet
 // - 'mounted', if the component is currently mounted
-// - 'cancelled', if the component has not been mounted yet but will be destroyed soon
 // - 'destroyed' if the component is currently destroyed
 ```

doc/reference/error_handling.md

@@ -51,8 +51,8 @@ that render its content, and a fallback if an error happened.
 ```js
 class ErrorBoundary extends Component {
   static template = xml`
-    <t t-if="state.error" t-slot="fallback">An error occurred</t>
-    <t t-else="" t-slot="default"/>`;
+    <t t-if="error" t-slot="fallback">An error occurred</t>
+    <t t-else="" t-slot="content"`;
 
   setup() {
     this.state = useState({ error: false });

doc/reference/hooks.md

@@ -190,13 +190,12 @@ will then be updated accordingly.
 ### `useExternalListener`
 
 The `useExternalListener` hook helps solve a very common problem: adding and removing
-a listener on some target whenever a component is mounted/unmounted. It takes a target
-as its first argument, forwards the other arguments to `addEventListener`. For example,
+a listener on some target whenever a component is mounted/unmounted. For example,
 a dropdown menu (or its parent) may need to listen to a `click` event on `window`
 to be closed:
 
 ```js
-useExternalListener(window, "click", this.closeMenu, { capture: true });
+useExternalListener(window, "click", this.closeMenu);
 ```
 
 ### `useComponent`

doc/reference/portal.md

@@ -15,3 +15,11 @@ class SomeComponent extends Component {
 The `t-portal` directive takes a valid css selector as argument. The content of
 the portalled template will be mounted at the corresponding location. Note that
 Owl need to insert an empty text node at the location of the portalled content.
+
+The `t-portal` directive supports a `.closest` modifier. It is useful to select
+the closest target from the portal location: Owl will look for a target in the
+current parent element, then in its parent, and so on until it finds it.
+
+```xml
+      <div t-portal.closest="'.target'">some content</div>
+```

doc/reference/props.md

@@ -140,28 +140,6 @@ class SomeComponent extends Component {
 The `.bind` suffix also implies `.alike`, so these props will not cause additional
 renderings.
 
-## Translatable props
-
-When you need to pass a user-facing string to a subcomponent, you likely want it
-to be translated. Unfortunately, because props are arbitrary expressions, it wouldn't
-be practical for Owl to find out which parts of the expression are strings and translate
-them, and it also makes it difficult for tooling to extract these strings to generate
-terms to translate. While you can work around this issue by doing the translation in
-JavaScript, or by using `t-set` with a body (the body of `t-set` is translated),
-and passing the variable as a prop, this is a sufficiently common use case that Owl
-provides a suffix for this purpose: `.translate`.
-
-```xml
-<t t-name="ParentComponent">
-    <Child someProp.translate="some message"/>
-</t>
-```
-
-Note that the content of this attribute is _NOT_ treated as a JavaScript expression:
-it is treated as a string, as if it was an attribute on an HTML element, and translated
-before being passed to the component. If you need to interpolate some data into the
-string, you will still have to do this in JavaScript.
-
 ## Dynamic Props
 
 The `t-props` directive can be used to specify totally dynamic props:
@@ -260,7 +238,7 @@ class ComponentB extends owl.Component {
     count: {type: Number},
     messages: {
       type: Array,
-      element: {type: Object, shape: {id: Boolean, text: String }}
+      element: {type: Object, shape: {id: Boolean, text: String }
     },
    date: Date,
    combinedVal: [Number, Boolean],
@@ -298,8 +276,7 @@ class ComponentB extends owl.Component {
         id: Number,
         name: {type: String, optional: true},
         url: String
-      }
-    },  // object, with keys id (number), name (string, optional) and url (string)
+      ]},    // object, with keys id (number), name (string, optional) and url (string)
     someObj3: {
       type: Object,
       values: { type: Array, element: String },
@@ -320,28 +297,6 @@ class ComponentB extends owl.Component {
 
 Note: the props validation code is done by using the [validate utility function](utils.md#validate).
 
-### `slots` prop
-
-If a component that uses [slots](slots.md) also lists or validates its props, then
-you will have to explicitely allow the `slots` prop (with an `Object` type), or
-allow extra props using the `*` notation mentioned above. This is because slots
-are provided to a component [as props](slots.md#slots-and-props).
-
-For example:
-
-```js
-class MyComponent extends Component {
-  static props = [someProp, slots?];
-}
-
-class MyComponentWithValidation extends Component {
-  static props = {
-    someProp: {type: Number, optional: true},
-    slots : {type: Object, optional: true},
-  }
-}
-```
-
 ## Good Practices
 
 A `props` object is a collection of values that come from the parent. As such,

doc/reference/reactivity.md

@@ -152,7 +152,7 @@ This may seem counter-intuitive, but it makes perfect sense in the context of co
 ```js
 class DoubleCounter extends Component {
   static template = xml`
-    <t t-esc="'selected: ' + state.selected + ', value: ' + state[state.selected]"/>
+    <t t-esc="state.selected + ': ' + state[state.selected].value"/>
     <button t-on-click="() => this.state.count1++">increment count 1</button>
     <button t-on-click="() => this.state.count2++">increment count 2</button>
     <button t-on-click="changeCounter">Switch counter</button>
@@ -193,7 +193,7 @@ to be able to opt out of creating them in the first place. This is the purpose o
 ### `markRaw`
 
 Marks an object so that it is ignored by the reactivity system, meaning that if this object is ever
-part of a reactive object, it will be returned as is, and no keys in that object will be
+part of a of a reactive object, it will be returned as is, and no keys in that object will be
 observed.
 
 ```js

doc/reference/slots.md

@@ -133,7 +133,7 @@ Slots can define a default content, in case the parent did not define them:
 ## Dynamic Slots
 
 The `t-slot` directive is actually able to use any expressions, using string
-interpolation:
+interplolation:
 
 ```xml
  <t t-slot="{{current}}" />
@@ -201,17 +201,16 @@ use this `Notebook` component:
 
 ```xml
 <Notebook>
-  <t t-set-slot="page1" title.translate="Page 1">
+  <t t-set-slot="page1" title="'Page 1'">
     <div>this is in the page 1</div>
   </t>
-  <t t-set-slot="page2" title.translate="Page 2" hidden="somevalue">
+  <t t-set-slot="page2" title="'Page 2'" hidden="somevalue">
     <div>this is in the page 2</div>
   </t>
 </Notebook>
 ```
 
-Slot params works like normal props, so one can use suffixes like `.translate`
-when a prop is a user facing string and should be translated, or `.bind` to
+Slot params works like normal props, so one can use the `.bind` suffix to
 bind a function if needed.
 
 ## Slot scopes

doc/reference/templates.md

@@ -18,7 +18,6 @@
   - [Sub Templates](#sub-templates)
   - [Dynamic Sub Templates](#dynamic-sub-templates)
   - [Debugging](#debugging)
-  - [Custom Directives](#custom-directives)
 - [Fragments](#fragments)
 - [Inline templates](#inline-templates)
 - [Rendering svg](#rendering-svg)
@@ -56,19 +55,17 @@ extensions.
 
 For reference, here is a list of all standard QWeb directives:
 
-| Name                           | Description                                                             |
-| ------------------------------ | ----------------------------------------------------------------------- |
-| `t-esc`                        | [Outputting safely a value](#outputting-data)                           |
-| `t-out`                        | [Outputting value, possibly without escaping](#outputting-data)         |
-| `t-set`, `t-value`             | [Setting variables](#setting-variables)                                 |
-| `t-if`, `t-elif`, `t-else`,    | [conditionally rendering](#conditionals)                                |
-| `t-foreach`, `t-as`            | [Loops](#loops)                                                         |
-| `t-att`, `t-attf-*`, `t-att-*` | [Dynamic attributes](#dynamic-attributes)                               |
-| `t-call`                       | [Rendering sub templates](#sub-templates)                               |
-| `t-debug`, `t-log`             | [Debugging](#debugging)                                                 |
-| `t-translation`                | [Disabling the translation of a node](translations.md)                  |
-| `t-translation-context`        | [Context of translations within a node](translations.md)                |
-| `t-translation-context-*`      | [Context of translation for a specific node attribute](translations.md) |
+| Name                           | Description                                                     |
+| ------------------------------ | --------------------------------------------------------------- |
+| `t-esc`                        | [Outputting safely a value](#outputting-data)                   |
+| `t-out`                        | [Outputting value, possibly without escaping](#outputting-data) |
+| `t-set`, `t-value`             | [Setting variables](#setting-variables)                         |
+| `t-if`, `t-elif`, `t-else`,    | [conditionally rendering](#conditionals)                        |
+| `t-foreach`, `t-as`            | [Loops](#loops)                                                 |
+| `t-att`, `t-attf-*`, `t-att-*` | [Dynamic attributes](#dynamic-attributes)                       |
+| `t-call`                       | [Rendering sub templates](#sub-templates)                       |
+| `t-debug`, `t-log`             | [Debugging](#debugging)                                         |
+| `t-translation`                | [Disabling the translation of a node](translations.md)          |
 
 The component system in Owl requires additional directives, to express various
 needs. Here is a list of all Owl specific directives:
@@ -83,7 +80,6 @@ needs. Here is a list of all Owl specific directives:
 | `t-slot`, `t-set-slot`, `t-slot-scope` | [Rendering a slot](slots.md)                                    |
 | `t-model`                              | [Form input bindings](input_bindings.md)                        |
 | `t-tag`                                | [Rendering nodes with dynamic tag name](#dynamic-tag-names)     |
-| `t-custom-*`                           | [Rendering nodes with custom directives](#custom-directives)    |
 
 ## QWeb Template Reference
 
@@ -193,15 +189,6 @@ The first `t-out` will act as a `t-esc` directive, which means that the content
 of `value1` will be escaped. However, since `value2` has been tagged as a markup,
 this will be injected as html.
 
-`markup` can also be used as a tag function, allowing the interpolated values to
-be safely escaped:
-
-```js
-const maliciousInput = "<script>alert('💥💥')</script>";
-// <b>&lt;script&gt;alert(&#x27;💥💥&#x27;)&lt;/script&gt;</b>
-const value = markup`<b>${maliciousInput}</b>`;
-```
-
 ### Setting Variables
 
 QWeb allows creating variables from within the template, to memoize a computation (to use it multiple times), give a piece of data a clearer name, ...
@@ -389,16 +376,15 @@ An important difference should be made with the usual `QWeb` behaviour: Owl
 requires the presence of a `t-key` directive, to be able to properly reconcile
 renderings.
 
-`t-foreach` can iterate on any iterable, and also has special support for objects
-and maps, it will expose the key of the current iteration as the contents of the
-`t-as`, and the corresponding value with the same name and the suffix `_value`.
+`t-foreach` can iterate on an array (the current item will be the current value)
+or an object (the current item will be the current key).
 
-In addition to the name passed via t-as, `t-foreach` provides a few other useful
-variables (note: `$as` will be replaced with the name passed to `t-as`):
+In addition to the name passed via t-as, `t-foreach` provides a few other
+variables for various data points (note: `$as` will be replaced with the name
+passed to `t-as`):
 
-- `$as_value`: the current iteration value, identical to `$as` for arrays and
-  other iterables, but for objects and maps, it provides the value (where `$as`
-  provides the key)
+- `$as_value`: the current iteration value, identical to `$as` for lists and
+  integers, but for objects, it provides the value (where `$as` provides the key)
 - `$as_index`: the current iteration index (the first item of the iteration has index 0)
 - `$as_first`: whether the current item is the first of the iteration
   (equivalent to `$as_index == 0`)
@@ -601,35 +587,6 @@ will stop execution if the browser dev tools are open.
 
 will print 42 to the console.
 
-### Custom Directives
-
-Owl 2 supports the declaration of custom directives. To use them, an Object of functions needs to be configured on the owl APP:
-
-```js
- new App(..., {
-    customDirectives: {
-     test_directive: function (el, value) {
-            el.setAttribute("t-on-click", value);
-       }
-   }
-  });
-```
-
-The functions will be called when a custom directive with the name of the
-function is found. The original element will be replaced with the one
-modified by the function.
-This :
-
-```xml
-<div t-custom-test_directive="click" />
-```
-
-will be replaced by :
-
-```xml
-<div t-on-click="value"/>
-```
-
 ## Fragments
 
 Owl 2 supports templates with an arbitrary number of root elements, or even just

doc/reference/translations.md

@@ -1,28 +1,17 @@
 # 🦉 Translations 🦉
 
 If properly setup, Owl can translate all rendered templates. To do
-so, it needs a translate function, which takes
-
-- a string (the term to translate)
-- a string (the translation context of the term)
-  and returns a string.
+so, it needs a translate function, which takes a string and returns a string.
 
 For example:
 
 ```js
 const translations = {
-  fr: {
-    hello: "bonjour",
-    yes: "oui",
-    no: "non",
-  },
-  pt: {
-    hello: "bom dia",
-    yes: "sim",
-    no: "não",
-  },
+  hello: "bonjour",
+  yes: "oui",
+  no: "non",
 };
-const translateFn = (str, ctx) => translations[ctx]?.[str] || str;
+const translateFn = (str) => translations[str] || str;
 
 const app = new App(Root, { templates, tranaslateFn });
 // ...
@@ -38,11 +27,6 @@ Once setup, all rendered templates will be translated using `translateFn`:
   `placeholder`, `label` and `alt`,
 - translating text nodes can be disabled with the special attribute `t-translation`,
   if its value is `off`.
-- the translate function receives as second parameter a context that can be used
-  to contextualized the translation. That context can be set globally on a node
-  and its children by using `t-translation-context`. If a specific node
-  attribute `x` needs another context, that context can be specified with a
-  special directive `t-translation-context-x`.
 
 So, with the above `translateFn`, the following templates:
 
@@ -62,22 +46,6 @@ will be rendered as:
 <input placeholder="bonjour" other="yes"/>
 ```
 
-and the following template:
-
-```xml
-<div t-translation-context="fr" title="hello">hello</div>
-<div>Are you sure?</div>
-<input t-translation-context-placeholder="pt" placeholder="hello" other="yes"/>
-```
-
-will be rendered as:
-
-```xml
-<div title="bonjour">bonjour</div>
-<div>Are you sure?</div>
-<input placeholder="bom dia" other="yes"/>
-```
-
 Note that the translation is done during the compilation of the template, not
 when it is rendered.
 

doc/reference/utils.md

@@ -9,7 +9,6 @@ functions are all available in the `owl.utils` namespace.
 - [`loadFile`](#loadfile): loading a file (useful for templates)
 - [`EventBus`](#eventbus): a simple EventBus
 - [`validate`](#validate): a validation function
-- [`batched`](#batched): batch function calls
 
 ## `whenReady`
 
@@ -79,22 +78,3 @@ validate(
 //    - 'id' is missing (should be a number),
 //    - 'url' is missing (should be a boolean or list of numbers),
 ```
-
-## `batched`
-
-The `batched` function creates a batched version of a callback so that multiple calls to it within the same microtick will only result in a single invocation of the original callback.
-
-```js
-function hello() {
-  console.log("hello");
-}
-
-const batchedHello = batched(hello);
-batchedHello();
-// Nothing is logged
-batchedHello();
-// Still not logged
-
-await Promise.resolve(); // Await the next microtick
-// "hello" is logged only once
-```

doc/tools/devtools_guide.md

@@ -35,13 +35,13 @@ The components tab is separated into two sub windows: the components tree in the
 the component details in the right. The components tree will display all the different
 components that are present in the tab in the form of a tree. The root of this tree is
 actually the app which is not a component but can still be inspected by the devtools like
-one. There can also be multiple apps loaded in the page like in website:
+one. There can also be multiple apps loaded in the page like in the following:
 
 <img src="screenshots/multi_apps.png"/>
 
 There is a convenient search bar at the top of the components tree which will help finding
 the components tou want in the tree and also, an element picker can be used to directly select
-the component you want to focus on in the page which is especially useful when 1trying to find
+the component you want to focus on in the page which is especially useful when trying to find
 what you want. Just click on the elements picker icon and click on the element you want to focus
 on in the page and it will be selected in the devtools accordingly. Hovering any element in the
 page in this mode will highlight it and the same happens anytime in the components tree.
@@ -64,40 +64,31 @@ as its env, props, observed states and all the other variables that are present
 While the props and the env are already present on the actual instance of the component and are
 pretty explicit by themselves, the observed state value is a bit more complicated to grasp.
 
-The observed state is actually information about which variables are being observed by the component:
-when any property of a reactive object is being read by the component, the component will subscribe
-to this property which means it will listen to any change that can occur on the property and render
-when such a change occurs. This can be visualized easily within the devtools inside of the observed
-state section: observed properties of the reactive object(s) are displayed in bold while the others
-are greyed out. Do keep in mind that a greyed out property in the observed state of one component
-may be observed by another and the other way around is also possible. Here is an example for some
-user Field component:
+The observed state is actually information about which variables are observed by the component
+which will trigger a rerender of the component when it is modified. The keys represent which part of the
+variable is actually observed and the target is the actual variable. For simplicity, the properties
+that are not observed by the component are greyed out while the others are in bold. This means that
+editing bold ones will trigger a rerender while the greyed out ones will not.
 
 <img src="screenshots/states.png"/>
 
-Navigation inside the properties is also similar to the one in console variables: properties have
+In the given example, we have two keys/target pairs for two different variables. The first one indicates
+that adding or removing an element to the array will trigger a rerender since the length will have changed.
+Replacing the element at index 0, 1 or 2 will also have the same effect as implied by the keys. It doesn't
+mean that editing the properties of element at index 0, 1 or 2 will rerender the component though. It may
+be the case for some but this will be described in another keys/target pair. The second keys/target pair
+is actually the element at index 0 of the first pair. It only has id in the keys meaning that only the
+id property will actually trigger a rerender the component when modified. Be aware however that the other
+properties may be in the observed state of another component like a child one in this case. A greyed out
+property only implies it is not reactive for the selected component and not for the others.
+
+The navigation inside the properties is also similar to the one in console variables: properties have
 their prototype displayed and getters will get their value when clicked on (...). It is also possible to
 send any property to the console using the right-click context menu on it and functions can be inspected
 in the sources tab as well.
 
 <img src="screenshots/function_menu.png"/>
 
-Using the right-click context menu on a property also allows to observe variables. Observed variables will
-be sent to a dedicated section of the details window and their value will be refreshed every 200ms. These
-variables are only shown when they are found and their access path will be kept in memory inside the
-browser so that it will always persist until the user decides to stop observing the variable. As in the
-browser's devtools, observed objects are displayed in reduced form and cannot be interacted with. It is
-still possible to send them to the console or remove them from the list using right-click.
-
-<img src="screenshots/observe_variables.png"/>
-
-The last section of the details window is filled with the component's lifecycle hooks. Using right click on
-them allows to place breakpoints inside the hook (either on its instance or class, hooks like mounted and
-willStart cannot have instance-based breakpoints because they will never trigger). Conditions in conditional
-breakpoints will be evaluated in the context of the component's definition.
-
-<img src="screenshots/hooks.png"/>
-
 There are several icons available to perform several of the actions described before in the components
 tree context menu and all these actions are also available by opening the menu by right-clicking on the
 component's name. Using the left click on the component's name will focus it in the components tree.
@@ -105,10 +96,8 @@ component's name. Using the left click on the component's name will focus it in
 It is also possible to edit any of the leaf node properties. To do so, you must double click on the
 property's value and modify it using the freshly created input then press enter to apply the changes.
 Do note that the modified values should be written in JSON format in order to be valid (examples:
-89, "yes", undefined, null, \["hello", 15\], {"a": 1}, true, ...). Editing any value will produce a
-manual render of the component (or the root component of the application in the case of env values).
-Whether the edition has an impact on the component or not and whether it produces an error is the
-responsability of the user.
+89, "yes", undefined, null, \["hello", 15\], {"a": 1}, true, ...). Whether it has an impact on the
+component or not and whether it produces an error is the responsability of the user.
 
 <img src="screenshots/edit.png"/>
 
@@ -128,8 +117,7 @@ are intercepted by the devtools using the record button.
 The second button is used to clear all the events that have been recorded. The select can be used to
 switch between the tree view (which shows the causality between renders) and the events log view which
 simply displays the events in the exact order they were triggered. In this view, you can expand the create,
-update and destroy events which reveals the component that initiated the event. Also, a transition line will
-appear each time a new animation frame has been loaded between events.
+update and destroy events which reveals the component that initiated the event.
 
 <img src="screenshots/events_log.png"/>
 
@@ -143,29 +131,20 @@ There is also the Trace Renderings and Trace Subscriptions features. These featu
 recording of events and have no effect on the profiler tab. The Trace Renderings option is used to log in
 the console all the render events and allows to show their traceback information. Similarly, the Trace
 Subscriptions option logs all the properties that caused a render event and also allows to see the traceback
-of the modification.
+of the modification
 
 <img src="screenshots/trace_rendering.png"/>
 <img src="screenshots/trace_subscriptions.png"/>
 
-The Owl Devtools also allow to inspect iframes coded in Owl: when an Owl iframe is detected in the page,
-the iframe selector will appear next to the tabs. This allows to switch from an iframe to another easily.
-Be aware that switching iframes will clear all record events from the profiler tab. Iframes detection is
-currently not working in the firefox version, we are aware of this issue and will try to address it in the
-future.
-
-<img src="screenshots/iframes.png"/>
-
 ## Options
 
 The owl devtools extension has a dark mode feature which defaults to your general devtools settings and can
-be toggled using the sun/moon icon at the top-right corner of the tab. There is also a refresh button to
-completely reset the owl devtools.
+be toggled using the sun/moon icon at the top-right corner of the tab. All the examples above were created
+with the dark mode enabled. There is also a refresh button to completely reset the owl devtools.
 
 <img src="screenshots/darkmode.png"/>
 
 ## Troubleshooting
 
-If the feedback from the page to the devtools seems to be cut, you can first try to use the refresh
-button mentioned above but if it still doesn't seem to work, just close the devtools and refresh the page.
+If the feedback from the page to the devtools seems to be cut, just close the devtools and refresh the page.
 This will eventually happen any time a tab stays opened for too long without being refreshed.

docs/index.html

@@ -10,7 +10,7 @@
   <link rel="stylesheet" href="assets/milligram.css">
   <link rel="stylesheet" href="assets/highlight.tomorrow.css">
   <link rel="stylesheet" href="assets/main.css">
-  <script type="importmap">{ "imports": { "@odoo/owl": "./owl.js" } }</script>
+  <script src="./owl.js"></script>
 </head>
 <body>
   <header class="container">
@@ -68,6 +68,7 @@
     <p><a href=".">OWL</a> is licensed under LGPLv3.<br>Logo from <a href="https://github.com/googlefonts/noto-emoji">Google Noto Emoji Font</a>, licensed under Apache License 2.0</p>
   </footer>
   <script src="assets/highlight.pack.js"></script>
+  <script type="importmap">{ "imports": { "@odoo/owl": "./owl.js" } }</script>
   <script type="module" src="display_code.js"></script>
   <script type="module" src="counter.js"></script>
 </body>

docs/playground/playground.js

@@ -41,6 +41,9 @@ const loadFile = (path) => {
  * Make an iframe, with all the js, css and xml properly injected.
  */
 function makeCodeIframe(js, css, xml) {
+  // escape backticks in the xml so they don't close the template string
+  const escapedXml = xml.replace(/`/g, '\\\`');
+
   const iframe = document.createElement("iframe");
   iframe.onload = () => {
     const doc = iframe.contentDocument;
@@ -52,8 +55,6 @@ function makeCodeIframe(js, css, xml) {
 
     const script = doc.createElement("script");
     script.type = "module";
-    // escape characters with special meaning in template literals
-    const escapedXml = xml.replace(/\\/g, "\\\\").replace(/`/g, "\\`").replace(/\$\{/, "\\${");
     script.textContent = `const TEMPLATES = \`${escapedXml}\`\n${js}`;
     doc.body.appendChild(script);
 

docs/playground/samples/todo_app/todo_app.js

@@ -43,6 +43,10 @@ class TaskList {
         }
     }
 
+    toggleTask(task) {
+        task.isCompleted = !task.isCompleted;
+    }
+
     toggleTask(id) {
         const task = this.tasks.find(t => t.id === id);
         task.isCompleted = !task.isCompleted;
@@ -57,7 +61,7 @@ class TaskList {
     clearCompleted() {
         const tasks = this.tasks.filter(t => t.isCompleted);
         for (let task of tasks) {
-            this.deleteTask(task.id);
+            this.deleteTask(task);
         }
     }
     

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@odoo/owl",
-  "version": "2.8.1",
+  "version": "2.1.3",
   "description": "Odoo Web Library (OWL)",
   "main": "dist/owl.cjs.js",
   "module": "dist/owl.es.js",
@@ -9,7 +9,7 @@
     "dist"
   ],
   "engines": {
-    "node": ">=20.0.0"
+    "node": ">=12.18.3"
   },
   "scripts": {
     "build:bundle": "rollup -c --failAfterWarnings",
@@ -22,7 +22,7 @@
     "build:devtools-chrome": "npm run dev:devtools-chrome -- --config-env=production",
     "build:devtools-firefox": "npm run dev:devtools-firefox -- --config-env=production",
     "test": "jest",
-    "test:debug": "node node_modules/.bin/jest --runInBand --watch --testTimeout=5000000",
+    "test:debug": "node --inspect-brk node_modules/.bin/jest --runInBand --watch --testTimeout=5000000",
     "test:watch": "jest --watch",
     "playground:serve": "python3 tools/playground_server.py || python tools/playground_server.py",
     "playground": "npm run build && npm run playground:serve",
@@ -32,10 +32,7 @@
     "check-formatting": "prettier {src/*.ts,src/**/*.ts,tests/*.ts,tests/**/*.ts,doc/*.md,doc/**/*.md,tools/devtools/**/*.js} --check",
     "lint": "eslint src/**/*.ts tests/**/*.ts",
     "release": "node tools/release.js",
-    "compile_templates": "node tools/compile_owl_templates.mjs"
-  },
-  "bin": {
-    "compile_owl_templates": "tools/compile_owl_templates.mjs"
+    "compile_templates": "node tools/compile_xml.js"
   },
   "repository": {
     "type": "git",
@@ -49,7 +46,6 @@
   "homepage": "https://github.com/odoo/owl#readme",
   "devDependencies": {
     "@types/jest": "^27.0.1",
-    "@types/jsdom": "^21.1.7",
     "@types/node": "^14.11.8",
     "@typescript-eslint/eslint-plugin": "5.48.1",
     "@typescript-eslint/parser": "5.48.1",
@@ -101,8 +97,5 @@
   "prettier": {
     "printWidth": 100,
     "endOfLine": "auto"
-  },
-  "dependencies": {
-    "jsdom": "^25.0.1"
   }
 }

rollup.config.js

@@ -1,6 +1,6 @@
 import pkg from "./package.json";
 import git from "git-rev-sync";
-import typescript from "rollup-plugin-typescript2";
+import typescript from 'rollup-plugin-typescript2';
 import { terser } from "rollup-plugin-terser";
 import dts from "rollup-plugin-dts";
 
@@ -12,7 +12,7 @@ const ES_FILENAME = "dist/owl.es.js";
 
 if (pkg.module !== ES_FILENAME || pkg.main !== CJS_FILENAME) {
   throw new Error("package.json has been modified. Build script should be updated accordingly");
-}
+}  
 
 const outro = `
 __info__.date = '${new Date().toISOString()}';
@@ -21,37 +21,39 @@ __info__.url = 'https://github.com/odoo/owl';
 `;
 
 switch (process.argv[4]) {
-  case "compiler":
-    (input = "src/compiler/index.ts"),
-      (output = [getConfigForFormat("cjs", "dist/compiler.js", "")]);
+  case "compiler": 
+    input = "src/compiler/index.ts",
+    output = [
+      getConfigForFormat('cjs', 'dist/compiler.js', ''),
+    ]
     break;
   case "runtime":
     input = "src/runtime/index.ts";
     output = [
-      getConfigForFormat("esm", addSuffix(ES_FILENAME, "runtime"), outro),
-      getConfigForFormat("cjs", addSuffix(CJS_FILENAME, "runtime"), outro),
-      getConfigForFormat("iife", addSuffix(IIFE_FILENAME, "runtime"), outro),
-      getConfigForFormat("iife", addSuffix(IIFE_FILENAME, "runtime"), outro, true),
-    ];
+      getConfigForFormat('esm', addSuffix(ES_FILENAME,  'runtime'), outro),
+      getConfigForFormat('cjs', addSuffix(CJS_FILENAME,  'runtime'), outro),
+      getConfigForFormat('iife', addSuffix(IIFE_FILENAME,  'runtime'), outro),
+      getConfigForFormat('iife', addSuffix(IIFE_FILENAME,  'runtime'), outro, true),
+    ]
     break;
   default:
-    (input = "src/index.ts"),
-      (output = [
-        getConfigForFormat("esm", ES_FILENAME, outro),
-        getConfigForFormat("cjs", CJS_FILENAME, outro),
-        getConfigForFormat("iife", IIFE_FILENAME, outro),
-        getConfigForFormat("iife", IIFE_FILENAME, outro, true),
-      ]);
-}
+    input = "src/index.ts",
+    output = [
+      getConfigForFormat('esm', ES_FILENAME, outro),
+      getConfigForFormat('cjs', CJS_FILENAME, outro),
+      getConfigForFormat('iife', IIFE_FILENAME, outro),
+      getConfigForFormat('iife', IIFE_FILENAME, outro, true),
+    ]
+  }
 
 /**
  * Generate from a string depicting a path a new path for the minified version.
  * @param {string} pkgFileName file name
  */
 function addSuffix(pkgFileName, suffix) {
-  const parts = pkgFileName.split(".");
+  const parts = pkgFileName.split('.');
   parts.splice(parts.length - 1, 0, suffix);
-  return parts.join(".");
+  return parts.join('.');
 }
 
 /**
@@ -69,7 +71,7 @@ function getConfigForFormat(format, generatedFileName, outro, minified = false)
     outro: outro,
     freeze: false,
     plugins: minified ? [terser()] : [],
-    indent: "    ", // indent with 4 spaces
+    indent: '    ', // indent with 4 spaces
   };
 }
 
@@ -79,19 +81,9 @@ export default [
     output,
     plugins: [
       typescript({
-        useTsconfigDeclarationDir: true,
+        useTsconfigDeclarationDir: true
       }),
-    ],
-  },
-  {
-    input: "src/compiler/standalone/index.ts",
-    output: [{ file: "dist/compile_templates.mjs", format: "es" }],
-    external: ["fs", "fs/promises", "path", "jsdom"],
-    plugins: [
-      typescript({
-        useTsconfigDeclarationDir: true,
-      }),
-    ],
+    ]
   },
   {
     input: "dist/types/index.d.ts",

signal.md

@@ -1,18 +0,0 @@
-# encountered issues
-## dropdown issue
-- there was a problem that writing in a state while the effect was updated.
-  - the tracking of signal being written were dropped because we cleared it
-    after re-running the effect that made a write.
-  - solution: clear the tracked signal before re-executing the effects
-- reading signal A while also writing signal A makes an infinite loop
-  - current solution: use toRaw in order to not track the read
-  - possible better solution to explore: do not track read if there is a write in a effect.
-## website issue
-- a rpc request was made on onWillStart, onWillStart was tracking reads. (see WebsiteBuilderClientAction)
-  - The read subsequently made a write, that re-triggered the onWillStart.
-  - A similar situation happened with onWillUpdateProps (see Transition)
-  - solution: prevent tracking reads in onWillStart and onWillUpdateProps
-
-# future
-- worker for computation?
-- cap'n web

src/common/owl_error.ts

@@ -1,4 +0,0 @@
-// Custom error class that wraps error that happen in the owl lifecycle
-export class OwlError extends Error {
-  cause?: any;
-}

src/common/types.ts

@@ -1,28 +0,0 @@
-export type ExecutionContext = {
-  onReadAtom: (atom: Atom) => void;
-  unsubcribe?: (scheduledContexts: Set<ExecutionContext>) => void;
-  update?: Function;
-  atoms?: Set<Atom>;
-  meta?: any;
-  // getParent: () => ExecutionContext | undefined;
-  // getChildren: () => ExecutionContext[];
-  // schedule: () => void;
-};
-
-export type customDirectives = Record<
-  string,
-  (node: Element, value: string, modifier: string[]) => void
->;
-
-export type Atom = {
-  executionContexts: Set<ExecutionContext>;
-  dependents: Set<DerivedAtom>;
-  getValue: () => any;
-};
-
-export type OldValue = any;
-
-export type DerivedAtom = Atom & {
-  dependencies: Map<Atom, OldValue>;
-  computed: boolean;
-};

src/common/utils.ts

@@ -1,38 +0,0 @@
-import { OwlError } from "./owl_error";
-
-/**
- * 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
- */
-export 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 OwlError(msg);
-  }
-
-  return doc;
-}

src/compiler/code_generator.ts

@@ -24,19 +24,18 @@ import {
   ASTTOut,
   ASTTPortal,
   ASTTranslation,
-  ASTTranslationContext,
   ASTTSet,
   ASTType,
   Attrs,
   EventHandlers,
 } from "./parser";
-import { OwlError } from "../common/owl_error";
+import { OwlError } from "../runtime/error_handling";
 
 type BlockType = "block" | "text" | "multi" | "list" | "html" | "comment";
 const whitespaceRE = /\s+/g;
 
 export interface Config {
-  translateFn?: (s: string, translationCtx: string) => string;
+  translateFn?: (s: string) => string;
   translatableAttributes?: string[];
   dev?: boolean;
 }
@@ -44,7 +43,6 @@ export interface Config {
 export interface CodeGenOptions extends Config {
   hasSafeContext?: boolean;
   name?: string;
-  hasGlobalValues: boolean;
 }
 
 // using a non-html document so that <inner/outer>HTML serializes as XML instead
@@ -84,14 +82,6 @@ function isProp(tag: string, key: string): boolean {
   return false;
 }
 
-/**
- * Returns a template literal that evaluates to str. You can add interpolation
- * sigils into the string if required
- */
-function toStringExpression(str: string) {
-  return `\`${str.replace(/\\/g, "\\\\").replace(/`/g, "\\`").replace(/\$\{/, "\\${")}\``;
-}
-
 // -----------------------------------------------------------------------------
 // BlockDescription
 // -----------------------------------------------------------------------------
@@ -170,9 +160,9 @@ interface Context {
   block: BlockDescription | null;
   index: number | string;
   forceNewBlock: boolean;
+  preventRoot?: boolean;
   isLast?: boolean;
   translate: boolean;
-  translationCtx: string;
   tKeyExpr: string | null;
   nameSpace?: string;
   tModelSelectedExpr?: string;
@@ -187,7 +177,6 @@ function createContext(parentCtx: Context, params?: Partial<Context>): Context {
       index: 0,
       forceNewBlock: true,
       translate: parentCtx.translate,
-      translationCtx: parentCtx.translationCtx,
       tKeyExpr: null,
       nameSpace: parentCtx.nameSpace,
       tModelSelectedExpr: parentCtx.tModelSelectedExpr,
@@ -254,16 +243,7 @@ class CodeTarget {
   }
 }
 
-const TRANSLATABLE_ATTRS = [
-  "alt",
-  "aria-label",
-  "aria-placeholder",
-  "aria-roledescription",
-  "aria-valuetext",
-  "label",
-  "placeholder",
-  "title",
-];
+const TRANSLATABLE_ATTRS = ["label", "title", "placeholder", "alt"];
 const translationRE = /^(\s*)([\s\S]+?)(\s*)$/;
 
 export class CodeGenerator {
@@ -275,7 +255,7 @@ export class CodeGenerator {
   target = new CodeTarget("template");
   templateName?: string;
   dev: boolean;
-  translateFn: (s: string, translationCtx: string) => string;
+  translateFn: (s: string) => string;
   translatableAttributes: string[] = TRANSLATABLE_ATTRS;
   ast: AST;
   staticDefs: { id: string; expr: string }[] = [];
@@ -299,9 +279,6 @@ export class CodeGenerator {
     this.dev = options.dev || false;
     this.ast = ast;
     this.templateName = options.name;
-    if (options.hasGlobalValues) {
-      this.helpers.add("__globals__");
-    }
   }
 
   generateCode(): string {
@@ -315,7 +292,6 @@ export class CodeGenerator {
       forceNewBlock: false,
       isLast: true,
       translate: true,
-      translationCtx: "",
       tKeyExpr: null,
     });
     // define blocks and utility functions
@@ -336,13 +312,14 @@ export class CodeGenerator {
       mainCode.push(``);
       for (let block of this.blocks) {
         if (block.dom) {
-          let xmlString = toStringExpression(block.asXmlString());
+          let xmlString = block.asXmlString();
+          xmlString = xmlString.replace(/\\/g, "\\\\").replace(/`/g, "\\`");
           if (block.dynamicTagName) {
-            xmlString = xmlString.replace(/^`<\w+/, `\`<\${tag || '${block.dom.nodeName}'}`);
-            xmlString = xmlString.replace(/\w+>`$/, `\${tag || '${block.dom.nodeName}'}>\``);
-            mainCode.push(`let ${block.blockName} = tag => createBlock(${xmlString});`);
+            xmlString = xmlString.replace(/^<\w+/, `<\${tag || '${block.dom.nodeName}'}`);
+            xmlString = xmlString.replace(/\w+>$/, `\${tag || '${block.dom.nodeName}'}>`);
+            mainCode.push(`let ${block.blockName} = tag => createBlock(\`${xmlString}\`);`);
           } else {
-            mainCode.push(`let ${block.blockName} = createBlock(${xmlString});`);
+            mainCode.push(`let ${block.blockName} = createBlock(\`${xmlString}\`);`);
           }
         }
       }
@@ -400,7 +377,7 @@ export class CodeGenerator {
   ): BlockDescription {
     const hasRoot = this.target.hasRoot;
     const block = new BlockDescription(this.target, type);
-    if (!hasRoot) {
+    if (!hasRoot && !ctx.preventRoot) {
       this.target.hasRoot = true;
       block.isRoot = true;
     }
@@ -426,7 +403,7 @@ export class CodeGenerator {
       blockExpr = `toggler(${ctx.tKeyExpr}, ${blockExpr})`;
     }
 
-    if (block.isRoot) {
+    if (block.isRoot && !ctx.preventRoot) {
       if (this.target.on) {
         blockExpr = this.wrapWithEventCatcher(blockExpr, this.target.on);
       }
@@ -470,11 +447,6 @@ export class CodeGenerator {
       .join("");
   }
 
-  translate(str: string, translationCtx: string): string {
-    const match = translationRE.exec(str) as any;
-    return match[1] + this.translateFn(match[2], translationCtx) + match[3];
-  }
-
   /**
    * @returns the newly created block name, if any
    */
@@ -514,8 +486,6 @@ export class CodeGenerator {
         return this.compileTSlot(ast, ctx);
       case ASTType.TTranslation:
         return this.compileTTranslation(ast, ctx);
-      case ASTType.TTranslationContext:
-        return this.compileTTranslationContext(ast, ctx);
       case ASTType.TPortal:
         return this.compileTPortal(ast, ctx);
     }
@@ -541,7 +511,7 @@ export class CodeGenerator {
     const isNewBlock = !block || forceNewBlock;
     if (isNewBlock) {
       block = this.createBlock(block, "comment", ctx);
-      this.insertBlock(`comment(${toStringExpression(ast.value)})`, block, {
+      this.insertBlock(`comment(\`${ast.value}\`)`, block, {
         ...ctx,
         forceNewBlock: forceNewBlock && !block,
       });
@@ -557,7 +527,8 @@ export class CodeGenerator {
 
     let value = ast.value;
     if (value && ctx.translate !== false) {
-      value = this.translate(value, ctx.translationCtx);
+      const match = translationRE.exec(value) as any;
+      value = match[1] + this.translateFn(match[2]) + match[3];
     }
     if (!ctx.inPreTag) {
       value = value.replace(whitespaceRE, " ");
@@ -565,7 +536,7 @@ export class CodeGenerator {
 
     if (!block || forceNewBlock) {
       block = this.createBlock(block, "text", ctx);
-      this.insertBlock(`text(${toStringExpression(value)})`, block, {
+      this.insertBlock(`text(\`${value}\`)`, block, {
         ...ctx,
         forceNewBlock: forceNewBlock && !block,
       });
@@ -611,6 +582,11 @@ export class CodeGenerator {
     }
     // attributes
     const attrs: Attrs = {};
+    const nameSpace = ast.ns || ctx.nameSpace;
+    if (nameSpace && isNewBlock) {
+      // specific namespace uri
+      attrs["block-ns"] = nameSpace;
+    }
 
     for (let key in ast.attrs) {
       let expr, attrName;
@@ -646,8 +622,7 @@ export class CodeGenerator {
           }
         }
       } else if (this.translatableAttributes.includes(key)) {
-        const attrTranslationCtx = ast.attrsTranslationCtx?.[key] || ctx.translationCtx;
-        attrs[key] = this.translateFn(ast.attrs[key], attrTranslationCtx);
+        attrs[key] = this.translateFn(ast.attrs[key]);
       } else {
         expr = `"${ast.attrs[key]}"`;
         attrName = key;
@@ -740,10 +715,7 @@ export class CodeGenerator {
       attrs["block-ref"] = String(idx);
     }
 
-    const nameSpace = ast.ns || ctx.nameSpace;
-    const dom = nameSpace
-      ? xmlDoc.createElementNS(nameSpace, ast.tag)
-      : xmlDoc.createElement(ast.tag);
+    const dom = xmlDoc.createElement(ast.tag);
     for (const [attr, val] of Object.entries(attrs)) {
       if (!(attr === "class" && val === "")) {
         dom.setAttribute(attr, val);
@@ -785,7 +757,7 @@ export class CodeGenerator {
             if (!current) break;
           }
         }
-        this.addLine(`let ${block!.children.map((c) => c.varName).join(", ")};`, codeIdx);
+        this.addLine(`let ${block!.children.map((c) => c.varName)};`, codeIdx);
       }
     }
     return block!.varName;
@@ -801,8 +773,7 @@ export class CodeGenerator {
       expr = compileExpr(ast.expr);
       if (ast.defaultValue) {
         this.helpers.add("withDefault");
-        // FIXME: defaultValue is not translated
-        expr = `withDefault(${expr}, ${toStringExpression(ast.defaultValue)})`;
+        expr = `withDefault(${expr}, \`${ast.defaultValue}\`)`;
       }
     }
     if (!block || forceNewBlock) {
@@ -888,7 +859,7 @@ export class CodeGenerator {
             if (!current) break;
           }
         }
-        this.addLine(`let ${block!.children.map((c) => c.varName).join(", ")};`, codeIdx);
+        this.addLine(`let ${block!.children.map((c) => c.varName)};`, codeIdx);
       }
 
       // note: this part is duplicated from end of compilemulti:
@@ -919,18 +890,18 @@ export class CodeGenerator {
     }
     this.addLine(`for (let ${loopVar} = 0; ${loopVar} < ${l}; ${loopVar}++) {`);
     this.target.indentLevel++;
-    this.addLine(`ctx[\`${ast.elem}\`] = ${keys}[${loopVar}];`);
+    this.addLine(`ctx[\`${ast.elem}\`] = ${vals}[${loopVar}];`);
     if (!ast.hasNoFirst) {
       this.addLine(`ctx[\`${ast.elem}_first\`] = ${loopVar} === 0;`);
     }
     if (!ast.hasNoLast) {
-      this.addLine(`ctx[\`${ast.elem}_last\`] = ${loopVar} === ${keys}.length - 1;`);
+      this.addLine(`ctx[\`${ast.elem}_last\`] = ${loopVar} === ${vals}.length - 1;`);
     }
     if (!ast.hasNoIndex) {
       this.addLine(`ctx[\`${ast.elem}_index\`] = ${loopVar};`);
     }
     if (!ast.hasNoValue) {
-      this.addLine(`ctx[\`${ast.elem}_value\`] = ${vals}[${loopVar}];`);
+      this.addLine(`ctx[\`${ast.elem}_value\`] = ${keys}[${loopVar}];`);
     }
     this.define(`key${this.target.loopLevel}`, ast.key ? compileExpr(ast.key) : loopVar);
     if (this.dev) {
@@ -995,7 +966,7 @@ export class CodeGenerator {
     const isNewBlock = !block || forceNewBlock;
     let codeIdx = this.target.code.length;
     if (isNewBlock) {
-      const n = ast.content.filter((c) => !c.hasNoRepresentation).length;
+      const n = ast.content.filter((c) => c.type !== ASTType.TSet).length;
       let result: string | null = null;
       if (n <= 1) {
         for (let child of ast.content) {
@@ -1009,31 +980,34 @@ export class CodeGenerator {
     let index = 0;
     for (let i = 0, l = ast.content.length; i < l; i++) {
       const child = ast.content[i];
-      const forceNewBlock = !child.hasNoRepresentation;
+      const isTSet = child.type === ASTType.TSet;
       const subCtx = createContext(ctx, {
         block,
         index,
-        forceNewBlock,
+        forceNewBlock: !isTSet,
+        preventRoot: ctx.preventRoot,
         isLast: ctx.isLast && i === l - 1,
       });
       this.compileAST(child, subCtx);
-      if (forceNewBlock) {
+      if (!isTSet) {
         index++;
       }
     }
     if (isNewBlock) {
-      if (block!.hasDynamicChildren && block!.children.length) {
-        const code = this.target.code;
-        const children = block!.children.slice();
-        let current = children.shift();
-        for (let i = codeIdx; i < code.length; i++) {
-          if (code[i].trimStart().startsWith(`const ${current!.varName} `)) {
-            code[i] = code[i].replace(`const ${current!.varName}`, current!.varName);
-            current = children.shift();
-            if (!current) break;
+      if (block!.hasDynamicChildren) {
+        if (block!.children.length) {
+          const code = this.target.code;
+          const children = block!.children.slice();
+          let current = children.shift();
+          for (let i = codeIdx; i < code.length; i++) {
+            if (code[i].trimStart().startsWith(`const ${current!.varName} `)) {
+              code[i] = code[i].replace(`const ${current!.varName}`, current!.varName);
+              current = children.shift();
+              if (!current) break;
+            }
           }
+          this.addLine(`let ${block!.children.map((c) => c.varName)};`, codeIdx);
         }
-        this.addLine(`let ${block!.children.map((c) => c.varName).join(", ")};`, codeIdx);
       }
 
       const args = block!.children.map((c) => c.varName).join(", ");
@@ -1049,31 +1023,32 @@ export class CodeGenerator {
       ctxVar = generateId("ctx");
       this.addLine(`let ${ctxVar} = ${compileExpr(ast.context)};`);
     }
-    const isDynamic = INTERP_REGEXP.test(ast.name);
-    const subTemplate = isDynamic ? interpolate(ast.name) : "`" + ast.name + "`";
-    if (block && !forceNewBlock) {
-      this.insertAnchor(block);
-    }
-    block = this.createBlock(block, "multi", ctx);
     if (ast.body) {
       this.addLine(`${ctxVar} = Object.create(${ctxVar});`);
       this.addLine(`${ctxVar}[isBoundary] = 1;`);
       this.helpers.add("isBoundary");
-      const subCtx = createContext(ctx, { ctxVar });
+      const subCtx = createContext(ctx, { preventRoot: true, ctxVar });
       const bl = this.compileMulti({ type: ASTType.Multi, content: ast.body }, subCtx);
       if (bl) {
         this.helpers.add("zero");
         this.addLine(`${ctxVar}[zero] = ${bl};`);
       }
     }
-
-    const key = this.generateComponentKey();
+    const isDynamic = INTERP_REGEXP.test(ast.name);
+    const subTemplate = isDynamic ? interpolate(ast.name) : "`" + ast.name + "`";
+    if (block) {
+      if (!forceNewBlock) {
+        this.insertAnchor(block);
+      }
+    }
+    const key = `key + \`${this.generateComponentKey()}\``;
     if (isDynamic) {
       const templateVar = generateId("template");
       if (!this.staticDefs.find((d) => d.id === "call")) {
         this.staticDefs.push({ id: "call", expr: `app.callTemplate.bind(app)` });
       }
       this.define(templateVar, subTemplate);
+      block = this.createBlock(block, "multi", ctx);
       this.insertBlock(`call(this, ${templateVar}, ${ctxVar}, node, ${key})`, block!, {
         ...ctx,
         forceNewBlock: !block,
@@ -1081,6 +1056,7 @@ export class CodeGenerator {
     } else {
       const id = generateId(`callTemplate_`);
       this.staticDefs.push({ id, expr: `app.getTemplate(${subTemplate})` });
+      block = this.createBlock(block, "multi", ctx);
       this.insertBlock(`${id}.call(this, ${ctxVar}, node, ${key})`, block!, {
         ...ctx,
         forceNewBlock: !block,
@@ -1119,13 +1095,10 @@ export class CodeGenerator {
     } else {
       let value: string;
       if (ast.defaultValue) {
-        const defaultValue = toStringExpression(
-          ctx.translate ? this.translate(ast.defaultValue, ctx.translationCtx) : ast.defaultValue
-        );
         if (ast.value) {
-          value = `withDefault(${expr}, ${defaultValue})`;
+          value = `withDefault(${expr}, \`${ast.defaultValue}\`)`;
         } else {
-          value = defaultValue;
+          value = `\`${ast.defaultValue}\``;
         }
       } else {
         value = expr;
@@ -1136,12 +1109,12 @@ export class CodeGenerator {
     return null;
   }
 
-  generateComponentKey(currentKey: string = "key") {
+  generateComponentKey() {
     const parts = [generateId("__")];
     for (let i = 0; i < this.target.loopLevel; i++) {
       parts.push(`\${key${i + 1}}`);
     }
-    return `${currentKey} + \`${parts.join("__")}\``;
+    return parts.join("__");
   }
 
   /**
@@ -1155,18 +1128,8 @@ export class CodeGenerator {
    * "some-prop"       "state"          "'some-prop': ctx['state']"
    * "onClick.bind"    "onClick"        "onClick: bind(ctx, ctx['onClick'])"
    */
-  formatProp(
-    name: string,
-    value: string,
-    attrsTranslationCtx: { [name: string]: string } | null,
-    translationCtx: string
-  ): string {
-    if (name.endsWith(".translate")) {
-      const attrTranslationCtx = attrsTranslationCtx?.[name] || translationCtx;
-      value = toStringExpression(this.translateFn(value, attrTranslationCtx));
-    } else {
-      value = this.captureExpression(value);
-    }
+  formatProp(name: string, value: string): string {
+    value = this.captureExpression(value);
     if (name.includes(".")) {
       let [_name, suffix] = name.split(".");
       name = _name;
@@ -1175,24 +1138,17 @@ export class CodeGenerator {
           value = `(${value}).bind(this)`;
           break;
         case "alike":
-        case "translate":
           break;
         default:
-          throw new OwlError(`Invalid prop suffix: ${suffix}`);
+          throw new OwlError("Invalid prop suffix");
       }
     }
     name = /^[a-z_]+$/i.test(name) ? name : `'${name}'`;
     return `${name}: ${value || undefined}`;
   }
 
-  formatPropObject(
-    obj: { [prop: string]: any },
-    attrsTranslationCtx: { [name: string]: string } | null,
-    translationCtx: string
-  ): string[] {
-    return Object.entries(obj).map(([k, v]) =>
-      this.formatProp(k, v, attrsTranslationCtx, translationCtx)
-    );
+  formatPropObject(obj: { [prop: string]: any }): string[] {
+    return Object.entries(obj).map(([k, v]) => this.formatProp(k, v));
   }
 
   getPropString(props: string[], dynProps: string | null): string {
@@ -1209,9 +1165,7 @@ export class CodeGenerator {
     let { block } = ctx;
     // props
     const hasSlotsProp = "slots" in (ast.props || {});
-    const props: string[] = ast.props
-      ? this.formatPropObject(ast.props, ast.propsTranslationCtx, ctx.translationCtx)
-      : [];
+    const props: string[] = ast.props ? this.formatPropObject(ast.props) : [];
 
     // slots
     let slotDef: string = "";
@@ -1235,13 +1189,7 @@ export class CodeGenerator {
           params.push(`__scope: "${scope}"`);
         }
         if (ast.slots[slotName].attrs) {
-          params.push(
-            ...this.formatPropObject(
-              ast.slots[slotName].attrs!,
-              ast.slots[slotName].attrsTranslationCtx,
-              ctx.translationCtx
-            )
-          );
+          params.push(...this.formatPropObject(ast.slots[slotName].attrs!));
         }
         const slotInfo = `{${params.join(", ")}}`;
         slotStr.push(`'${slotName}': ${slotInfo}`);
@@ -1269,6 +1217,7 @@ export class CodeGenerator {
     }
 
     // cmap key
+    const key = this.generateComponentKey();
     let expr: string;
     if (ast.isDynamic) {
       expr = generateId("Comp");
@@ -1286,7 +1235,7 @@ export class CodeGenerator {
       this.insertAnchor(block);
     }
 
-    let keyArg = this.generateComponentKey();
+    let keyArg = `key + \`${key}\``;
     if (ctx.tKeyExpr) {
       keyArg = `${ctx.tKeyExpr} + ${keyArg}`;
     }
@@ -1359,17 +1308,16 @@ export class CodeGenerator {
       isMultiple = isMultiple || this.slotNames.has(ast.name);
       this.slotNames.add(ast.name);
     }
-    const attrs = { ...ast.attrs };
-    const dynProps = attrs["t-props"];
-    delete attrs["t-props"];
+    const dynProps = ast.attrs ? ast.attrs["t-props"] : null;
+    if (ast.attrs) {
+      delete ast.attrs["t-props"];
+    }
     let key = this.target.loopLevel ? `key${this.target.loopLevel}` : "key";
     if (isMultiple) {
-      key = this.generateComponentKey(key);
+      key = `${key} + \`${this.generateComponentKey()}\``;
     }
 
-    const props = ast.attrs
-      ? this.formatPropObject(attrs, ast.attrsTranslationCtx, ctx.translationCtx)
-      : [];
+    const props = ast.attrs ? this.formatPropObject(ast.attrs) : [];
     const scope = this.getPropString(props, dynProps);
     if (ast.defaultContent) {
       const name = this.compileInNewTarget("defaultContent", ast.defaultContent, ctx);
@@ -1402,15 +1350,6 @@ export class CodeGenerator {
     }
     return null;
   }
-  compileTTranslationContext(ast: ASTTranslationContext, ctx: Context): string | null {
-    if (ast.content) {
-      return this.compileAST(
-        ast.content,
-        Object.assign({}, ctx, { translationCtx: ast.translationCtx })
-      );
-    }
-    return null;
-  }
   compileTPortal(ast: ASTTPortal, ctx: Context): string {
     if (!this.staticDefs.find((d) => d.id === "Portal")) {
       this.staticDefs.push({ id: "Portal", expr: `app.Portal` });
@@ -1418,6 +1357,7 @@ export class CodeGenerator {
 
     let { block } = ctx;
     const name = this.compileInNewTarget("slot", ast.content, ctx);
+    const key = this.generateComponentKey();
     let ctxStr = "ctx";
     if (this.target.loopLevel || !this.hasSafeContext) {
       ctxStr = generateId("ctx");
@@ -1431,8 +1371,9 @@ export class CodeGenerator {
     });
 
     const target = compileExpr(ast.target);
-    const key = this.generateComponentKey();
-    const blockString = `${id}({target: ${target},slots: {'default': {__render: ${name}.bind(this), __ctx: ${ctxStr}}}}, ${key}, node, ctx, Portal)`;
+    const blockString = `${id}({target: ${target},${
+      ast.isClosest ? "isClosest: true," : ""
+    }slots: {'default': {__render: ${name}.bind(this), __ctx: ${ctxStr}}}}, key + \`${key}\`, node, ctx, Portal)`;
     if (block) {
       this.insertAnchor(block);
     }

src/compiler/index.ts

@@ -1,9 +1,7 @@
-import type { customDirectives } from "../common/types";
 import type { TemplateSet } from "../runtime/template_set";
 import type { BDom } from "../runtime/blockdom";
 import { CodeGenerator, Config } from "./code_generator";
 import { parse } from "./parser";
-import { OwlError } from "../common/owl_error";
 
 export type Template = (context: any, vnode: any, key?: string) => BDom;
 
@@ -11,17 +9,13 @@ export type TemplateFunction = (app: TemplateSet, bdom: any, helpers: any) => Te
 
 interface CompileOptions extends Config {
   name?: string;
-  customDirectives?: customDirectives;
-  hasGlobalValues: boolean;
 }
 export function compile(
   template: string | Element,
-  options: CompileOptions = {
-    hasGlobalValues: false,
-  }
+  options: CompileOptions = {}
 ): TemplateFunction {
   // parsing
-  const ast = parse(template, options.customDirectives);
+  const ast = parse(template);
 
   // some work
   const hasSafeContext =
@@ -33,15 +27,5 @@ export function compile(
   const codeGenerator = new CodeGenerator(ast, { ...options, hasSafeContext });
   const code = codeGenerator.generateCode();
   // template function
-  try {
-    return new Function("app, bdom, helpers", code) as TemplateFunction;
-  } catch (originalError: any) {
-    const { name } = options;
-    const nameStr = name ? `template "${name}"` : "anonymous template";
-    const err = new OwlError(
-      `Failed to compile ${nameStr}: ${originalError.message}\n\ngenerated code:\nfunction(app, bdom, helpers) {\n${code}\n}`
-    );
-    err.cause = originalError;
-    throw err;
-  }
+  return new Function("app, bdom, helpers", code) as TemplateFunction;
 }

src/compiler/inline_expressions.ts

@@ -1,4 +1,4 @@
-import { OwlError } from "../common/owl_error";
+import { OwlError } from "../runtime/error_handling";
 
 /**
  * Owl QWeb Expression Parser
@@ -28,7 +28,7 @@ import { OwlError } from "../common/owl_error";
 //------------------------------------------------------------------------------
 
 const RESERVED_WORDS =
-  "true,false,NaN,null,undefined,debugger,console,window,in,instanceof,new,function,return,eval,void,Math,RegExp,Array,Object,Date,__globals__".split(
+  "true,false,NaN,null,undefined,debugger,console,window,in,instanceof,new,function,return,eval,void,Math,RegExp,Array,Object,Date".split(
     ","
   );
 
@@ -268,7 +268,7 @@ export function compileExprToArray(expr: string): Token[] {
   const localVars = new Set<string>();
   const tokens = tokenize(expr);
   let i = 0;
-  let stack = []; // to track last opening (, [ or {
+  let stack = []; // to track last opening [ or {
 
   while (i < tokens.length) {
     let token = tokens[i];
@@ -279,12 +279,10 @@ export function compileExprToArray(expr: string): Token[] {
     switch (token.type) {
       case "LEFT_BRACE":
       case "LEFT_BRACKET":
-      case "LEFT_PAREN":
         stack.push(token.type);
         break;
       case "RIGHT_BRACE":
       case "RIGHT_BRACKET":
-      case "RIGHT_PAREN":
         stack.pop();
     }
 

src/compiler/parser.ts

@@ -1,6 +1,4 @@
-import { OwlError } from "../common/owl_error";
-import type { customDirectives } from "../common/types";
-import { parseXML } from "../common/utils";
+import { OwlError } from "../runtime/error_handling";
 
 // -----------------------------------------------------------------------------
 // AST Type definition
@@ -27,21 +25,15 @@ export const enum ASTType {
   TSlot,
   TCallBlock,
   TTranslation,
-  TTranslationContext,
   TPortal,
 }
 
-export interface BaseAST {
-  type: ASTType;
-  hasNoRepresentation?: true;
-}
-
-export interface ASTText extends BaseAST {
+export interface ASTText {
   type: ASTType.Text;
   value: string;
 }
 
-export interface ASTComment extends BaseAST {
+export interface ASTComment {
   type: ASTType.Comment;
   value: string;
 }
@@ -57,12 +49,11 @@ interface TModelInfo {
   specialInitTargetAttr: string | null;
 }
 
-export interface ASTDomNode extends BaseAST {
+export interface ASTDomNode {
   type: ASTType.DomNode;
   tag: string;
   content: AST[];
   attrs: Attrs | null;
-  attrsTranslationCtx: Attrs | null;
   ref: string | null;
   on: EventHandlers | null;
   model: TModelInfo | null;
@@ -70,24 +61,24 @@ export interface ASTDomNode extends BaseAST {
   ns: string | null;
 }
 
-export interface ASTMulti extends BaseAST {
+export interface ASTMulti {
   type: ASTType.Multi;
   content: AST[];
 }
 
-export interface ASTTEsc extends BaseAST {
+export interface ASTTEsc {
   type: ASTType.TEsc;
   expr: string;
   defaultValue: string;
 }
 
-export interface ASTTOut extends BaseAST {
+export interface ASTTOut {
   type: ASTType.TOut;
   expr: string;
   body: AST[] | null;
 }
 
-export interface ASTTif extends BaseAST {
+export interface ASTTif {
   type: ASTType.TIf;
   condition: string;
   content: AST;
@@ -95,16 +86,15 @@ export interface ASTTif extends BaseAST {
   tElse: AST | null;
 }
 
-export interface ASTTSet extends BaseAST {
+export interface ASTTSet {
   type: ASTType.TSet;
   name: string;
   value: string | null; // value defined in attribute
   defaultValue: string | null; // value defined in body, if text
   body: AST[] | null; // content of body if not text
-  hasNoRepresentation: true;
 }
 
-export interface ASTTForEach extends BaseAST {
+export interface ASTTForEach {
   type: ASTType.TForEach;
   collection: string;
   elem: string;
@@ -117,13 +107,13 @@ export interface ASTTForEach extends BaseAST {
   key: string | null;
 }
 
-export interface ASTTKey extends BaseAST {
+export interface ASTTKey {
   type: ASTType.TKey;
   expr: string;
   content: AST;
 }
 
-export interface ASTTCall extends BaseAST {
+export interface ASTTCall {
   type: ASTType.TCall;
   name: string;
   body: AST[] | null;
@@ -135,59 +125,51 @@ interface SlotDefinition {
   scope: string | null;
   on: EventHandlers | null;
   attrs: Attrs | null;
-  attrsTranslationCtx: Attrs | null;
 }
 
-export interface ASTComponent extends BaseAST {
+export interface ASTComponent {
   type: ASTType.TComponent;
   name: string;
   isDynamic: boolean;
   dynamicProps: string | null;
   on: EventHandlers | null;
   props: { [name: string]: string } | null;
-  propsTranslationCtx: { [name: string]: string } | null;
   slots: { [name: string]: SlotDefinition } | null;
 }
 
-export interface ASTSlot extends BaseAST {
+export interface ASTSlot {
   type: ASTType.TSlot;
   name: string;
   attrs: Attrs | null;
-  attrsTranslationCtx: Attrs | null;
   on: EventHandlers | null;
   defaultContent: AST | null;
 }
 
-export interface ASTTCallBlock extends BaseAST {
+export interface ASTTCallBlock {
   type: ASTType.TCallBlock;
   name: string;
 }
 
-export interface ASTDebug extends BaseAST {
+export interface ASTDebug {
   type: ASTType.TDebug;
   content: AST | null;
 }
 
-export interface ASTLog extends BaseAST {
+export interface ASTLog {
   type: ASTType.TLog;
   expr: string;
   content: AST | null;
 }
 
-export interface ASTTranslation extends BaseAST {
+export interface ASTTranslation {
   type: ASTType.TTranslation;
   content: AST | null;
 }
 
-export interface ASTTranslationContext extends BaseAST {
-  type: ASTType.TTranslationContext;
-  content: AST | null;
-  translationCtx: string;
-}
-
-export interface ASTTPortal extends BaseAST {
+export interface ASTTPortal {
   type: ASTType.TPortal;
   target: string;
+  isClosest: boolean;
   content: AST;
 }
 
@@ -209,7 +191,6 @@ export type AST =
   | ASTLog
   | ASTDebug
   | ASTTranslation
-  | ASTTranslationContext
   | ASTTPortal;
 
 // -----------------------------------------------------------------------------
@@ -217,34 +198,30 @@ export type AST =
 // -----------------------------------------------------------------------------
 const cache: WeakMap<Element, AST> = new WeakMap();
 
-export function parse(xml: string | Element, customDir?: customDirectives): AST {
-  const ctx = {
-    inPreTag: false,
-    customDirectives: customDir,
-  };
+export function parse(xml: string | Element): AST {
   if (typeof xml === "string") {
     const elem = parseXML(`<t>${xml}</t>`).firstChild as Element;
-    return _parse(elem, ctx);
+    return _parse(elem);
   }
   let ast = cache.get(xml);
   if (!ast) {
     // we clone here the xml to prevent modifying it in place
-    ast = _parse(xml.cloneNode(true) as Element, ctx);
+    ast = _parse(xml.cloneNode(true) as Element);
     cache.set(xml, ast);
   }
   return ast;
 }
 
-function _parse(xml: Element, ctx: ParsingContext): AST {
+function _parse(xml: Element): AST {
   normalizeXML(xml);
+  const ctx = { inPreTag: false, inSVG: false };
   return parseNode(xml, ctx) || { type: ASTType.Text, value: "" };
 }
 
 interface ParsingContext {
   tModelInfo?: TModelInfo | null;
-  nameSpace?: string;
   inPreTag: boolean;
-  customDirectives?: customDirectives;
+  inSVG: boolean;
 }
 
 function parseNode(node: Node, ctx: ParsingContext): AST | null {
@@ -252,19 +229,17 @@ function parseNode(node: Node, ctx: ParsingContext): AST | null {
     return parseTextCommentNode(node, ctx);
   }
   return (
-    parseTCustom(node, ctx) ||
     parseTDebugLog(node, ctx) ||
     parseTForEach(node, ctx) ||
     parseTIf(node, ctx) ||
     parseTPortal(node, ctx) ||
     parseTCall(node, ctx) ||
     parseTCallBlock(node, ctx) ||
-    parseTTranslation(node, ctx) ||
-    parseTTranslationContext(node, ctx) ||
-    parseTKey(node, ctx) ||
     parseTEscNode(node, ctx) ||
-    parseTOutNode(node, ctx) ||
+    parseTKey(node, ctx) ||
+    parseTTranslation(node, ctx) ||
     parseTSlot(node, ctx) ||
+    parseTOutNode(node, ctx) ||
     parseComponent(node, ctx) ||
     parseDOMNode(node, ctx) ||
     parseTSetNode(node, ctx) ||
@@ -302,37 +277,6 @@ function parseTextCommentNode(node: Node, ctx: ParsingContext): AST | null {
   return null;
 }
 
-function parseTCustom(node: Element, ctx: ParsingContext): AST | null {
-  if (!ctx.customDirectives) {
-    return null;
-  }
-  const nodeAttrsNames = node.getAttributeNames();
-  for (let attr of nodeAttrsNames) {
-    if (attr === "t-custom" || attr === "t-custom-") {
-      throw new OwlError("Missing custom directive name with t-custom directive");
-    }
-    if (attr.startsWith("t-custom-")) {
-      const directiveName = attr.split(".")[0].slice(9);
-      const customDirective = ctx.customDirectives[directiveName];
-      if (!customDirective) {
-        throw new OwlError(`Custom directive "${directiveName}" is not defined`);
-      }
-      const value = node.getAttribute(attr)!;
-      const modifiers = attr.split(".").slice(1);
-      node.removeAttribute(attr);
-      try {
-        customDirective(node, value, modifiers);
-      } catch (error) {
-        throw new OwlError(
-          `Custom directive "${directiveName}" throw the following error: ${error}`
-        );
-      }
-      return parseNode(node, ctx);
-    }
-  }
-  return null;
-}
-
 // -----------------------------------------------------------------------------
 // debugging
 // -----------------------------------------------------------------------------
@@ -340,30 +284,20 @@ function parseTCustom(node: Element, ctx: ParsingContext): AST | null {
 function parseTDebugLog(node: Element, ctx: ParsingContext): AST | null {
   if (node.hasAttribute("t-debug")) {
     node.removeAttribute("t-debug");
-    const content = parseNode(node, ctx);
-    const ast: ASTDebug = {
+    return {
       type: ASTType.TDebug,
-      content,
+      content: parseNode(node, ctx),
     };
-    if (content?.hasNoRepresentation) {
-      ast.hasNoRepresentation = true;
-    }
-    return ast;
   }
 
   if (node.hasAttribute("t-log")) {
     const expr = node.getAttribute("t-log")!;
     node.removeAttribute("t-log");
-    const content = parseNode(node, ctx);
-    const ast: ASTLog = {
+    return {
       type: ASTType.TLog,
       expr,
-      content,
+      content: parseNode(node, ctx),
     };
-    if (content?.hasNoRepresentation) {
-      ast.hasNoRepresentation = true;
-    }
-    return ast;
   }
   return null;
 }
@@ -390,23 +324,23 @@ function parseDOMNode(node: Element, ctx: ParsingContext): AST | null {
   if (tagName === "pre") {
     ctx.inPreTag = true;
   }
-
-  let ns = !ctx.nameSpace && ROOT_SVG_TAGS.has(tagName) ? "http://www.w3.org/2000/svg" : null;
+  const shouldAddSVGNS = ROOT_SVG_TAGS.has(tagName) && !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 nodeAttrsNames = node.getAttributeNames();
   let attrs: ASTDomNode["attrs"] = null;
-  let attrsTranslationCtx: ASTDomNode["attrsTranslationCtx"] = null;
   let on: EventHandlers | null = null;
   let model: TModelInfo | null = null;
 
   for (let attr of nodeAttrsNames) {
     const value = node.getAttribute(attr)!;
-    if (attr === "t-on" || attr === "t-on-") {
-      throw new OwlError("Missing event name with t-on directive");
-    }
-    if (attr.startsWith("t-on-")) {
+    if (attr.startsWith("t-on")) {
+      if (attr === "t-on") {
+        throw new OwlError("Missing event name with t-on directive");
+      }
       on = on || {};
       on[attr.slice(5)] = value;
     } else if (attr.startsWith("t-model")) {
@@ -432,11 +366,13 @@ function parseDOMNode(node: Element, ctx: ParsingContext): AST | null {
       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 hasTrimMod = attr.includes(".trim");
-      const hasLazyMod = hasTrimMod || attr.includes(".lazy");
+      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 = {
@@ -446,8 +382,8 @@ function parseDOMNode(node: Element, ctx: ParsingContext): AST | null {
         specialInitTargetAttr: isRadioInput ? "checked" : null,
         eventType,
         hasDynamicChildren: false,
-        shouldTrim: hasTrimMod,
-        shouldNumberize: hasNumberMod,
+        shouldTrim: hasTrimMod && (isOtherInput || isTextarea),
+        shouldNumberize: hasNumberMod && (isOtherInput || isTextarea),
       };
       if (isSelect) {
         // don't pollute the original ctx
@@ -456,12 +392,6 @@ function parseDOMNode(node: Element, ctx: ParsingContext): AST | null {
       }
     } else if (attr.startsWith("block-")) {
       throw new OwlError(`Invalid attribute: '${attr}'`);
-    } else if (attr === "xmlns") {
-      ns = value;
-    } else if (attr.startsWith("t-translation-context-")) {
-      const attrName = attr.slice(22);
-      attrsTranslationCtx = attrsTranslationCtx || {};
-      attrsTranslationCtx[attrName] = value;
     } else if (attr !== "t-name") {
       if (attr.startsWith("t-") && !attr.startsWith("t-att")) {
         throw new OwlError(`Unknown QWeb directive: '${attr}'`);
@@ -474,9 +404,6 @@ function parseDOMNode(node: Element, ctx: ParsingContext): AST | null {
       attrs[attr] = value;
     }
   }
-  if (ns) {
-    ctx.nameSpace = ns;
-  }
 
   const children = parseChildren(node, ctx);
   return {
@@ -484,7 +411,6 @@ function parseDOMNode(node: Element, ctx: ParsingContext): AST | null {
     tag: tagName,
     dynamicTag,
     attrs,
-    attrsTranslationCtx,
     on,
     ref,
     content: children,
@@ -521,6 +447,9 @@ function parseTEscNode(node: Element, ctx: ParsingContext): AST | null {
       content: [tesc],
     };
   }
+  if (ast.type === ASTType.TComponent) {
+    throw new OwlError("t-esc is not supported on Component nodes");
+  }
   return tesc;
 }
 
@@ -614,19 +543,11 @@ function parseTKey(node: Element, ctx: ParsingContext): AST | null {
   }
   const key = node.getAttribute("t-key")!;
   node.removeAttribute("t-key");
-  const content = parseNode(node, ctx);
-  if (!content) {
+  const body = parseNode(node, ctx);
+  if (!body) {
     return null;
   }
-  const ast: ASTTKey = {
-    type: ASTType.TKey,
-    expr: key,
-    content,
-  };
-  if (content.hasNoRepresentation) {
-    ast.hasNoRepresentation = true;
-  }
-  return ast;
+  return { type: ASTType.TKey, expr: key, content: body };
 }
 
 // -----------------------------------------------------------------------------
@@ -652,15 +573,7 @@ function parseTCall(node: Element, ctx: ParsingContext): AST | null {
     if (ast && ast.type === ASTType.TComponent) {
       return {
         ...ast,
-        slots: {
-          default: {
-            content: tcall,
-            scope: null,
-            on: null,
-            attrs: null,
-            attrsTranslationCtx: null,
-          },
-        },
+        slots: { default: { content: tcall, scope: null, on: null, attrs: null } },
       };
     }
   }
@@ -748,7 +661,7 @@ function parseTSetNode(node: Element, ctx: ParsingContext): AST | null {
   if (node.textContent !== node.innerHTML) {
     body = parseChildren(node, ctx);
   }
-  return { type: ASTType.TSet, name, value, defaultValue, body, hasNoRepresentation: true };
+  return { type: ASTType.TSet, name, value, defaultValue, body };
 }
 
 // -----------------------------------------------------------------------------
@@ -795,14 +708,9 @@ function parseComponent(node: Element, ctx: ParsingContext): AST | null {
   let on: ASTComponent["on"] = null;
 
   let props: ASTComponent["props"] = null;
-  let propsTranslationCtx: ASTComponent["propsTranslationCtx"] = null;
   for (let name of node.getAttributeNames()) {
     const value = node.getAttribute(name)!;
-    if (name.startsWith("t-translation-context-")) {
-      const attrName = name.slice(22);
-      propsTranslationCtx = propsTranslationCtx || {};
-      propsTranslationCtx[attrName] = value;
-    } else if (name.startsWith("t-")) {
+    if (name.startsWith("t-")) {
       if (name.startsWith("t-on-")) {
         on = on || {};
         on[name.slice(5)] = value;
@@ -834,14 +742,14 @@ function parseComponent(node: Element, ctx: ParsingContext): AST | null {
       // be ignored)
       let el = slotNode.parentElement!;
       let isInSubComponent = false;
-      while (el && el !== clone) {
+      while (el !== clone) {
         if (el!.hasAttribute("t-component") || el!.tagName[0] === el!.tagName[0].toUpperCase()) {
           isInSubComponent = true;
           break;
         }
         el = el.parentElement!;
       }
-      if (isInSubComponent || !el) {
+      if (isInSubComponent) {
         continue;
       }
 
@@ -850,17 +758,12 @@ function parseComponent(node: Element, ctx: ParsingContext): AST | null {
       const slotAst = parseNode(slotNode, ctx);
       let on: SlotDefinition["on"] = null;
       let attrs: Attrs | null = null;
-      let attrsTranslationCtx: Attrs | null = null;
       let scope: string | null = null;
       for (let attributeName of slotNode.getAttributeNames()) {
         const value = slotNode.getAttribute(attributeName)!;
         if (attributeName === "t-slot-scope") {
           scope = value;
           continue;
-        } else if (attributeName.startsWith("t-translation-context-")) {
-          const attrName = attributeName.slice(22);
-          attrsTranslationCtx = attrsTranslationCtx || {};
-          attrsTranslationCtx[attrName] = value;
         } else if (attributeName.startsWith("t-on-")) {
           on = on || {};
           on[attributeName.slice(5)] = value;
@@ -870,7 +773,7 @@ function parseComponent(node: Element, ctx: ParsingContext): AST | null {
         }
       }
       slots = slots || {};
-      slots[name] = { content: slotAst, on, attrs, attrsTranslationCtx, scope };
+      slots[name] = { content: slotAst, on, attrs, scope };
     }
 
     // default slot
@@ -878,25 +781,10 @@ function parseComponent(node: Element, ctx: ParsingContext): AST | null {
     slots = slots || {};
     // t-set-slot="default" has priority over content
     if (defaultContent && !slots.default) {
-      slots.default = {
-        content: defaultContent,
-        on,
-        attrs: null,
-        attrsTranslationCtx: null,
-        scope: defaultSlotScope,
-      };
+      slots.default = { content: defaultContent, on, attrs: null, scope: defaultSlotScope };
     }
   }
-  return {
-    type: ASTType.TComponent,
-    name,
-    isDynamic,
-    dynamicProps,
-    props,
-    propsTranslationCtx,
-    slots,
-    on,
-  };
+  return { type: ASTType.TComponent, name, isDynamic, dynamicProps, props, slots, on };
 }
 
 // -----------------------------------------------------------------------------
@@ -910,17 +798,12 @@ function parseTSlot(node: Element, ctx: ParsingContext): AST | null {
   const name = node.getAttribute("t-slot")!;
   node.removeAttribute("t-slot");
   let attrs: Attrs | null = null;
-  let attrsTranslationCtx: Attrs | null = null;
   let on: ASTComponent["on"] = null;
   for (let attributeName of node.getAttributeNames()) {
     const value = node.getAttribute(attributeName)!;
     if (attributeName.startsWith("t-on-")) {
       on = on || {};
       on[attributeName.slice(5)] = value;
-    } else if (attributeName.startsWith("t-translation-context-")) {
-      const attrName = attributeName.slice(22);
-      attrsTranslationCtx = attrsTranslationCtx || {};
-      attrsTranslationCtx[attrName] = value;
     } else {
       attrs = attrs || {};
       attrs[attributeName] = value;
@@ -930,65 +813,20 @@ function parseTSlot(node: Element, ctx: ParsingContext): AST | null {
     type: ASTType.TSlot,
     name,
     attrs,
-    attrsTranslationCtx,
     on,
     defaultContent: parseChildNodes(node, ctx),
   };
 }
 
-// -----------------------------------------------------------------------------
-// Translation
-// -----------------------------------------------------------------------------
-
-function wrapInTTranslationAST(r: AST | null) {
-  const ast: ASTTranslation = { type: ASTType.TTranslation, content: r };
-  if (r?.hasNoRepresentation) {
-    ast.hasNoRepresentation = true;
-  }
-  return ast;
-}
-
 function parseTTranslation(node: Element, ctx: ParsingContext): AST | null {
   if (node.getAttribute("t-translation") !== "off") {
     return null;
   }
   node.removeAttribute("t-translation");
-  const result = parseNode(node, ctx);
-  if (result?.type === ASTType.Multi) {
-    const children = result.content.map(wrapInTTranslationAST);
-    return makeASTMulti(children);
-  }
-  return wrapInTTranslationAST(result);
-}
-
-// -----------------------------------------------------------------------------
-// Translation Context
-// -----------------------------------------------------------------------------
-
-function wrapInTTranslationContextAST(r: AST | null, translationCtx: string) {
-  const ast: ASTTranslationContext = {
-    type: ASTType.TTranslationContext,
-    content: r,
-    translationCtx,
+  return {
+    type: ASTType.TTranslation,
+    content: parseNode(node, ctx),
   };
-  if (r?.hasNoRepresentation) {
-    ast.hasNoRepresentation = true;
-  }
-  return ast;
-}
-
-function parseTTranslationContext(node: Element, ctx: ParsingContext): AST | null {
-  const translationCtx = node.getAttribute("t-translation-context");
-  if (!translationCtx) {
-    return null;
-  }
-  node.removeAttribute("t-translation-context");
-  const result = parseNode(node, ctx);
-  if (result?.type === ASTType.Multi) {
-    const children = result.content.map((c) => wrapInTTranslationContextAST(c, translationCtx));
-    return makeASTMulti(children);
-  }
-  return wrapInTTranslationContextAST(result, translationCtx);
 }
 
 // -----------------------------------------------------------------------------
@@ -996,11 +834,18 @@ function parseTTranslationContext(node: Element, ctx: ParsingContext): AST | nul
 // -----------------------------------------------------------------------------
 
 function parseTPortal(node: Element, ctx: ParsingContext): AST | null {
-  if (!node.hasAttribute("t-portal")) {
+  let target, isClosest;
+  if (node.hasAttribute("t-portal")) {
+    target = node.getAttribute("t-portal")!;
+    node.removeAttribute("t-portal");
+    isClosest = false;
+  } else if (node.hasAttribute("t-portal.closest")) {
+    target = node.getAttribute("t-portal.closest")!;
+    node.removeAttribute("t-portal.closest");
+    isClosest = true;
+  } else {
     return null;
   }
-  const target = node.getAttribute("t-portal")!;
-  node.removeAttribute("t-portal");
   const content = parseNode(node, ctx);
   if (!content) {
     return {
@@ -1011,6 +856,7 @@ function parseTPortal(node: Element, ctx: ParsingContext): AST | null {
   return {
     type: ASTType.TPortal,
     target,
+    isClosest,
     content,
   };
 }
@@ -1037,14 +883,6 @@ function parseChildren(node: Element, ctx: ParsingContext): AST[] {
   return children;
 }
 
-function makeASTMulti(children: AST[]) {
-  const ast: ASTMulti = { type: ASTType.Multi, content: children };
-  if (children.every((c) => c.hasNoRepresentation)) {
-    ast.hasNoRepresentation = true;
-  }
-  return ast;
-}
-
 /**
  * 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.
@@ -1057,7 +895,7 @@ function parseChildNodes(node: Element, ctx: ParsingContext): AST | null {
     case 1:
       return children[0];
     default:
-      return makeASTMulti(children);
+      return { type: ASTType.Multi, content: children };
   }
 }
 
@@ -1114,23 +952,21 @@ function normalizeTIf(el: Element) {
  *
  * @param el the element containing the tree that should be normalized
  */
-function normalizeTEscTOut(el: Element) {
-  for (const d of ["t-esc", "t-out"]) {
-    const elements = [...el.querySelectorAll(`[${d}]`)].filter(
-      (el) => el.tagName[0] === el.tagName[0].toUpperCase() || el.hasAttribute("t-component")
-    );
-    for (const el of elements) {
-      if (el.childNodes.length) {
-        throw new OwlError(`Cannot have ${d} on a component that already has content`);
-      }
-      const value = el.getAttribute(d);
-      el.removeAttribute(d);
-      const t = el.ownerDocument.createElement("t");
-      if (value != null) {
-        t.setAttribute(d, value);
-      }
-      el.appendChild(t);
+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 OwlError("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);
   }
 }
 
@@ -1142,5 +978,42 @@ function normalizeTEscTOut(el: Element) {
  */
 function normalizeXML(el: Element) {
   normalizeTIf(el);
-  normalizeTEscTOut(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 OwlError(msg);
+  }
+
+  return doc;
 }

src/compiler/standalone/index.ts

@@ -1,89 +0,0 @@
-// -----------------------------------------------------------------------------
-// This file exports a function that allows compiling templates ahead of time.
-// It is used by the "compile_owl_template" command registered in the "bin"
-// section of owl's package.json
-// -----------------------------------------------------------------------------
-
-import { readdir, readFile, stat } from "fs/promises";
-import path from "path";
-import "./setup_jsdom";
-// Owl imports must be made after setting up jsdom in the global namespace
-import { compile } from "..";
-
-// -----------------------------------------------------------------------------
-// helpers
-// -----------------------------------------------------------------------------
-async function getXmlFiles(paths: string[]): Promise<string[]> {
-  return (
-    await Promise.all(
-      paths.map(async (file) => {
-        const stats = await stat(path.join(file));
-        if (stats.isDirectory()) {
-          return await getXmlFiles(
-            (await readdir(file)).map((fileName) => path.join(file, fileName))
-          );
-        }
-        if (file.endsWith(".xml")) {
-          return file;
-        }
-        return [];
-      })
-    )
-  ).flat();
-}
-
-// adapted from https://medium.com/@mhagemann/the-ultimate-way-to-slugify-a-url-string-in-javascript-b8e4a0d849e1
-const a = "·-_,:;";
-const p = new RegExp(a.split("").join("|"), "g");
-
-function slugify(str: string) {
-  return str
-    .replace(/\//g, "") // remove /
-    .replace(/\./g, "_") // Replace . with _
-    .replace(p, (c) => "_") // Replace special characters
-    .replace(/&/g, "_and_") // Replace & with ‘and’
-    .replace(/[^\w\-]+/g, ""); // Remove all non-word characters
-}
-
-// -----------------------------------------------------------------------------
-// main
-// -----------------------------------------------------------------------------
-
-export async function compileTemplates(paths: string[]) {
-  const files = await getXmlFiles(paths);
-  process.stdout.write(`Processing ${files.length} files`);
-  let xmlStrings = await Promise.all(files.map((file) => readFile(file, "utf8")));
-
-  const templates = [];
-  const errors = [];
-
-  for (let i = 0; i < files.length; i++) {
-    const fileName = files[i];
-    const fileContent = xmlStrings[i];
-    process.stdout.write(`.`);
-    const parser = new DOMParser();
-    const doc = parser.parseFromString(fileContent, "text/xml");
-    for (const template of doc.querySelectorAll("[t-name]")) {
-      const name = template.getAttribute("t-name");
-      if (template.hasAttribute("owl")) {
-        template.removeAttribute("owl");
-      }
-      const fnName = slugify(name!);
-      try {
-        const fn = compile(template).toString().replace("anonymous", fnName);
-        templates.push(`"${name}": ${fn},\n`);
-      } catch (e) {
-        errors.push({ name, fileName, e });
-      }
-    }
-  }
-  process.stdout.write(`\n`);
-
-  for (let { name, fileName, e } of errors) {
-    console.warn(`Error while compiling '${name}' (in file ${fileName})`);
-    console.error(e);
-  }
-  console.log(`${templates.length} templates compiled`);
-
-  return `export const templates = {\n ${templates.join("\n")} \n}`;
-}

src/compiler/standalone/setup_jsdom.ts

@@ -1,13 +0,0 @@
-import jsdom from "jsdom";
-
-// -----------------------------------------------------------------------------
-// add global DOM stuff for compiler. Needs to be in a separate file so rollup
-// doesn't hoist the owl imports above this block of code.
-// -----------------------------------------------------------------------------
-var document = new jsdom.JSDOM("", {});
-var window = document.window;
-global.document = window.document;
-global.window = window as unknown as Window & typeof globalThis;
-global.DOMParser = window.DOMParser;
-global.Element = window.Element;
-global.Node = window.Node;

src/index.ts

@@ -12,7 +12,5 @@ TemplateSet.prototype._compileTemplate = function _compileTemplate(
     dev: this.dev,
     translateFn: this.translateFn,
     translatableAttributes: this.translatableAttributes,
-    customDirectives: this.customDirectives,
-    hasGlobalValues: this.hasGlobalValues,
   });
 };

src/runtime/app.ts

@@ -1,14 +1,12 @@
 import { version } from "../version";
 import { Component, ComponentConstructor, Props } from "./component";
-import { ComponentNode, saveCurrent } from "./component_node";
-import { nodeErrorHandlers, handleError } from "./error_handling";
-import { OwlError } from "../common/owl_error";
+import { ComponentNode } from "./component_node";
+import { nodeErrorHandlers, OwlError, handleError } from "./error_handling";
 import { Fiber, RootFiber, MountOptions } from "./fibers";
 import { Scheduler } from "./scheduler";
 import { validateProps } from "./template_helpers";
 import { TemplateSet, TemplateSetConfig } from "./template_set";
 import { validateTarget } from "./utils";
-import { toRaw, reactive } from "./reactivity";
 
 // reimplement dev mode stuff see last change in 0f7a8289a6fb8387c3c1af41c6664b2a8448758f
 
@@ -16,20 +14,24 @@ export interface Env {
   [key: string]: any;
 }
 
-export interface RootConfig<P, E> {
+export interface AppConfig<P, E> extends TemplateSetConfig {
+  name?: string;
   props?: P;
   env?: E;
-}
-
-export interface AppConfig<P, E> extends TemplateSetConfig, RootConfig<P, E> {
-  name?: string;
   test?: boolean;
   warnIfNoStaticProps?: boolean;
 }
 
 let hasBeenLogged = false;
 
-const apps = new Set<App>();
+export const DEV_MSG = () => {
+  const hash = (window as any).owl ? (window as any).owl.__info__.hash : "master";
+
+  return `Owl is running in 'dev' mode.
+
+This is not suitable for production use.
+See https://github.com/odoo/owl/blob/${hash}/doc/reference/app.md#configuration for more information.`;
+};
 
 declare global {
   interface Window {
@@ -37,19 +39,15 @@ declare global {
       apps: Set<App>;
       Fiber: typeof Fiber;
       RootFiber: typeof RootFiber;
-      toRaw: typeof toRaw;
-      reactive: typeof reactive;
     };
   }
 }
 
-interface Root<P extends Props, E> {
-  node: ComponentNode<P, E>;
-  mount(target: HTMLElement | ShadowRoot, options?: MountOptions): Promise<Component<P, E>>;
-  destroy(): void;
-}
-
-window.__OWL_DEVTOOLS__ ||= { apps, Fiber, RootFiber, toRaw, reactive };
+window.__OWL_DEVTOOLS__ ||= {
+  apps: new Set<App>(),
+  Fiber: Fiber,
+  RootFiber: RootFiber,
+};
 
 export class App<
   T extends abstract new (...args: any) => any = any,
@@ -57,7 +55,6 @@ export class App<
   E = any
 > extends TemplateSet {
   static validateTarget = validateTarget;
-  static apps = apps;
   static version = version;
 
   name: string;
@@ -65,7 +62,6 @@ export class App<
   props: P;
   env: E;
   scheduler = new Scheduler();
-  subRoots: Set<ComponentNode> = new Set();
   root: ComponentNode<P, E> | null = null;
   warnIfNoStaticProps: boolean;
 
@@ -73,13 +69,13 @@ export class App<
     super(config);
     this.name = config.name || "";
     this.Root = Root;
-    apps.add(this);
+    window.__OWL_DEVTOOLS__.apps.add(this);
     if (config.test) {
       this.dev = true;
     }
     this.warnIfNoStaticProps = config.warnIfNoStaticProps || false;
     if (this.dev && !config.test && !hasBeenLogged) {
-      console.info(`Owl is running in 'dev' mode.`);
+      console.info(DEV_MSG());
       hasBeenLogged = true;
     }
     const env = config.env || {};
@@ -92,49 +88,14 @@ export class App<
     target: HTMLElement | ShadowRoot,
     options?: MountOptions
   ): Promise<Component<P, E> & InstanceType<T>> {
-    const root = this.createRoot(this.Root, { props: this.props });
-    this.root = root.node;
-    this.subRoots.delete(root.node);
-    return root.mount(target, options) as any;
-  }
-
-  createRoot<Props extends object, SubEnv = any>(
-    Root: ComponentConstructor<Props, E>,
-    config: RootConfig<Props, SubEnv> = {}
-  ): Root<Props, SubEnv> {
-    const props = config.props || ({} as Props);
-    // hack to make sure the sub root get the sub env if necessary. for owl 3,
-    // would be nice to rethink the initialization process to make sure that
-    // we can create a ComponentNode and give it explicitely the env, instead
-    // of looking it up in the app
-    const env = this.env;
-    if (config.env) {
-      this.env = config.env as any;
+    App.validateTarget(target);
+    if (this.dev) {
+      validateProps(this.Root, this.props, { __owl__: { app: this } });
     }
-
-    const restore = saveCurrent();
-    const node = this.makeNode(Root, props);
-    restore();
-    if (config.env) {
-      this.env = env;
-    }
-    this.subRoots.add(node);
-    return {
-      node,
-      mount: (target: HTMLElement | ShadowRoot, options?: MountOptions) => {
-        App.validateTarget(target);
-        if (this.dev) {
-          validateProps(Root, props, { __owl__: { app: this } });
-        }
-        const prom = this.mountNode(node, target, options);
-        return prom;
-      },
-      destroy: () => {
-        this.subRoots.delete(node);
-        node.destroy();
-        this.scheduler.processTasks();
-      },
-    };
+    const node = this.makeNode(this.Root, this.props);
+    const prom = this.mountNode(node, target, options);
+    this.root = node;
+    return prom;
   }
 
   makeNode(Component: ComponentConstructor, props: any): ComponentNode {
@@ -170,13 +131,10 @@ export class App<
 
   destroy() {
     if (this.root) {
-      for (let subroot of this.subRoots) {
-        subroot.destroy();
-      }
+      this.scheduler.flush();
       this.root.destroy();
-      this.scheduler.processTasks();
     }
-    apps.delete(this);
+    window.__OWL_DEVTOOLS__.apps.delete(this);
   }
 
   createComponent<P extends Props>(

src/runtime/blockdom/attributes.ts

@@ -36,18 +36,10 @@ export function createAttrUpdater(attr: string): Setter<HTMLElement> {
 
 export function attrsSetter(this: HTMLElement, attrs: any) {
   if (isArray(attrs)) {
-    if (attrs[0] === "class") {
-      setClass.call(this, attrs[1]);
-    } else {
-      setAttribute.call(this, attrs[0], attrs[1]);
-    }
+    setAttribute.call(this, attrs[0], attrs[1]);
   } else {
     for (let k in attrs) {
-      if (k === "class") {
-        setClass.call(this, attrs[k]);
-      } else {
-        setAttribute.call(this, k, attrs[k]);
-      }
+      setAttribute.call(this, k, attrs[k]);
     }
   }
 }
@@ -60,11 +52,7 @@ export function attrsUpdater(this: HTMLElement, attrs: any, oldAttrs: any) {
       if (val === oldAttrs[1]) {
         return;
       }
-      if (name === "class") {
-        updateClass.call(this, val, oldAttrs[1]);
-      } else {
-        setAttribute.call(this, name, val);
-      }
+      setAttribute.call(this, name, val);
     } else {
       removeAttribute.call(this, oldAttrs[0]);
       setAttribute.call(this, name, val);
@@ -72,21 +60,13 @@ export function attrsUpdater(this: HTMLElement, attrs: any, oldAttrs: any) {
   } else {
     for (let k in oldAttrs) {
       if (!(k in attrs)) {
-        if (k === "class") {
-          updateClass.call(this, "", oldAttrs[k]);
-        } else {
-          removeAttribute.call(this, k);
-        }
+        removeAttribute.call(this, k);
       }
     }
     for (let k in attrs) {
       const val = attrs[k];
       if (val !== oldAttrs[k]) {
-        if (k === "class") {
-          updateClass.call(this, val, oldAttrs[k]);
-        } else {
-          setAttribute.call(this, k, val);
-        }
+        setAttribute.call(this, k, val);
       }
     }
   }

src/runtime/blockdom/block_compiler.ts

@@ -1,4 +1,4 @@
-import { OwlError } from "../../common/owl_error";
+import { OwlError } from "../error_handling";
 import { attrsSetter, attrsUpdater, createAttrUpdater, setClass, updateClass } from "./attributes";
 import { config } from "./config";
 import { createEventHandler } from "./events";
@@ -144,7 +144,12 @@ function buildTree(
         info.push({ type: "child", idx: index });
         el = document.createTextNode("");
       }
-      currentNS ||= (node as Element).namespaceURI;
+      const attrs = (node as Element).attributes;
+      const ns = attrs.getNamedItem("block-ns");
+      if (ns) {
+        attrs.removeNamedItem("block-ns");
+        currentNS = ns.value;
+      }
       if (!el) {
         el = currentNS
           ? document.createElementNS(currentNS, tagName)
@@ -160,7 +165,6 @@ function buildTree(
           const fragment = document.createElement("template").content;
           fragment.appendChild(el);
         }
-        const attrs = (node as Element).attributes;
         for (let i = 0; i < attrs.length; i++) {
           const attrName = attrs[i].name;
           const attrValue = attrs[i].value;

src/runtime/cancellableContext.ts

@@ -1,46 +0,0 @@
-export type TaskContext = { isCancelled: boolean; cancel: () => void; meta: Record<string, any> };
-
-export const taskContextStack: TaskContext[] = [];
-
-export function getTaskContext() {
-  return taskContextStack[taskContextStack.length - 1];
-}
-
-export function makeTaskContext(): TaskContext {
-  let isCancelled = false;
-  return {
-    get isCancelled() {
-      return isCancelled;
-    },
-    cancel() {
-      isCancelled = true;
-    },
-    meta: {},
-  };
-}
-
-export function useTaskContext(ctx?: TaskContext) {
-  ctx ??= makeTaskContext();
-  taskContextStack.push(ctx);
-  return {
-    ctx,
-    cleanup: () => {
-      taskContextStack.pop();
-    },
-  };
-}
-
-export function pushTaskContext(context: TaskContext) {
-  taskContextStack.push(context);
-}
-
-export function popTaskContext() {
-  taskContextStack.pop();
-}
-
-export function taskEffect(fn: Function) {
-  const { ctx, cleanup } = useTaskContext();
-  fn();
-  cleanup();
-  return ctx;
-}

src/runtime/component.ts

@@ -23,7 +23,7 @@ export type ComponentConstructor<P extends Props = any, E = any> = (new (
 
 export class Component<Props = any, Env = any> {
   static template: string = "";
-  static props?: Schema;
+  static props?: any;
   static defaultProps?: any;
 
   props: Props;

src/runtime/component_node.ts

@@ -1,23 +1,14 @@
-import { OwlError } from "../common/owl_error";
-import { Atom, ExecutionContext } from "../common/types";
 import type { App, Env } from "./app";
 import { BDom, VNode } from "./blockdom";
-import { makeTaskContext, TaskContext } from "./cancellableContext";
 import { Component, ComponentConstructor, Props } from "./component";
-import { fibersInError } from "./error_handling";
+import { fibersInError, OwlError } from "./error_handling";
 import { Fiber, makeChildFiber, makeRootFiber, MountFiber, MountOptions } from "./fibers";
-import { addAtomToContext, reactive, targets, withoutReactivity } from "./reactivity";
+import { clearReactivesForCallback, getSubscriptions, reactive, targets } from "./reactivity";
 import { STATUS } from "./status";
+import { batched, Callback } from "./utils";
 
 let currentNode: ComponentNode | null = null;
 
-export function saveCurrent() {
-  let n = currentNode;
-  return () => {
-    currentNode = n;
-  };
-}
-
 export function getCurrent(): ComponentNode {
   if (!currentNode) {
     throw new OwlError("No active component (a hook function should only be called in 'setup')");
@@ -43,7 +34,7 @@ function applyDefaultProps<P extends object>(props: P, defaultProps: Partial<P>)
 // Integration with reactivity system (useState)
 // -----------------------------------------------------------------------------
 
-// const batchedRenderFunctions = new WeakMap<ComponentNode, Callback>();
+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
@@ -55,7 +46,15 @@ function applyDefaultProps<P extends object>(props: P, defaultProps: Partial<P>)
  * @see reactive
  */
 export function useState<T extends object>(state: T): T {
-  return reactive(state);
+  const node = getCurrent();
+  let render = batchedRenderFunctions.get(node)!;
+  if (!render) {
+    render = batched(node.render.bind(node, false));
+    batchedRenderFunctions.set(node, render);
+    // manual implementation of onWillDestroy to break cyclic dependency
+    node.willDestroy.push(clearReactivesForCallback.bind(null, render));
+  }
+  return reactive(state, render);
 }
 
 // -----------------------------------------------------------------------------
@@ -89,8 +88,6 @@ export class ComponentNode<P extends Props = any, E = any> implements VNode<Comp
   willPatch: LifecycleHook[] = [];
   patched: LifecycleHook[] = [];
   willDestroy: LifecycleHook[] = [];
-  taskContext: TaskContext;
-  executionContext: ExecutionContext;
 
   constructor(
     C: ComponentConstructor<P, E>,
@@ -104,15 +101,6 @@ export class ComponentNode<P extends Props = any, E = any> implements VNode<Comp
     this.parent = parent;
     this.props = props;
     this.parentKey = parentKey;
-    this.taskContext = makeTaskContext();
-    this.executionContext = {
-      meta: this,
-      update: () => {
-        this.render(false);
-      },
-      onReadAtom: (atom: Atom) => addAtomToContext(atom, this.executionContext),
-      atoms: new Set<Atom>(),
-    };
     const defaultProps = C.defaultProps;
     props = Object.assign({}, props);
     if (defaultProps) {
@@ -120,18 +108,16 @@ export class ComponentNode<P extends Props = any, E = any> implements VNode<Comp
     }
     const env = (parent && parent.childEnv) || app.env;
     this.childEnv = env;
-    // for (const key in props) {
-    //   const prop = props[key];
-    //   if (prop && typeof prop === "object" && targets.has(prop)) {
-    //     props[key] = useState(prop);
-    //   }
-    // }
+    for (const key in props) {
+      const prop = props[key];
+      if (prop && typeof prop === "object" && targets.has(prop)) {
+        props[key] = useState(prop);
+      }
+    }
     this.component = new C(props, env, this);
     const ctx = Object.assign(Object.create(this.component), { this: this.component });
     this.renderFn = app.getTemplate(C.template).bind(this.component, ctx, this);
-    withoutReactivity(() => {
-      this.component.setup();
-    });
+    this.component.setup();
     currentNode = null;
   }
 
@@ -148,11 +134,7 @@ export class ComponentNode<P extends Props = any, E = any> implements VNode<Comp
     }
     const component = this.component;
     try {
-      let prom: Promise<any[]>;
-      withoutReactivity(() => {
-        prom = Promise.all(this.willStart.map((f) => f.call(component)));
-      });
-      await prom!;
+      await Promise.all(this.willStart.map((f) => f.call(component)));
     } catch (e) {
       this.app.handleError({ node: this, error: e });
       return;
@@ -163,9 +145,6 @@ export class ComponentNode<P extends Props = any, E = any> implements VNode<Comp
   }
 
   async render(deep: boolean) {
-    if (this.status >= STATUS.CANCELLED) {
-      return;
-    }
     let current = this.fiber;
     if (current && (current.root!.locked || (current as any).bdom === true)) {
       await Promise.resolve();
@@ -192,7 +171,7 @@ export class ComponentNode<P extends Props = any, E = any> implements VNode<Comp
 
     this.app.scheduler.addFiber(fiber);
     await Promise.resolve();
-    if (this.status >= STATUS.CANCELLED) {
+    if (this.status === STATUS.DESTROYED) {
       return;
     }
     // We only want to actually render the component if the following two
@@ -211,20 +190,6 @@ export class ComponentNode<P extends Props = any, E = any> implements VNode<Comp
     }
   }
 
-  cancel() {
-    this._cancel();
-    delete this.parent!.children[this.parentKey!];
-    this.app.scheduler.scheduleDestroy(this);
-  }
-
-  _cancel() {
-    this.status = STATUS.CANCELLED;
-    const children = this.children;
-    for (let childKey in children) {
-      children[childKey]._cancel();
-    }
-  }
-
   destroy() {
     let shouldRemove = this.status === STATUS.MOUNTED;
     this._destroy();
@@ -268,18 +233,15 @@ export class ComponentNode<P extends Props = any, E = any> implements VNode<Comp
     }
 
     currentNode = this;
-    // for (const key in props) {
-    //   const prop = props[key];
-    //   if (prop && typeof prop === "object" && targets.has(prop)) {
-    //     props[key] = useState(prop);
-    //   }
-    // }
+    for (const key in props) {
+      const prop = props[key];
+      if (prop && typeof prop === "object" && targets.has(prop)) {
+        props[key] = useState(prop);
+      }
+    }
     currentNode = null;
-    let prom: Promise<any[]>;
-    withoutReactivity(() => {
-      prom = Promise.all(this.willUpdateProps.map((f) => f.call(component, props)));
-    });
-    await prom!;
+    const prom = Promise.all(this.willUpdateProps.map((f) => f.call(component, props)));
+    await prom;
     if (fiber !== this.fiber) {
       return;
     }
@@ -397,8 +359,8 @@ export class ComponentNode<P extends Props = any, E = any> implements VNode<Comp
     return this.component.constructor.name;
   }
 
-  // get subscriptions(): ReturnType<typeof getSubscriptions> {
-  //   const render = batchedRenderFunctions.get(this);
-  //   return render ? getSubscriptions(render) : [];
-  // }
+  get subscriptions(): ReturnType<typeof getSubscriptions> {
+    const render = batchedRenderFunctions.get(this);
+    return render ? getSubscriptions(render) : [];
+  }
 }

src/runtime/error_handling.ts

@@ -1,7 +1,11 @@
-import { OwlError } from "../common/owl_error";
 import type { ComponentNode } from "./component_node";
 import type { Fiber } from "./fibers";
 
+// Custom error class that wraps error that happen in the owl lifecycle
+export class OwlError extends Error {
+  cause?: any;
+}
+
 // Maps fibers to thrown errors
 export const fibersInError: WeakMap<Fiber, any> = new WeakMap();
 export const nodeErrorHandlers: WeakMap<ComponentNode, ((error: any) => void)[]> = new WeakMap();
@@ -47,19 +51,17 @@ export function handleError(params: ErrorParams) {
     );
   }
   const node = "node" in params ? params.node : params.fiber.node;
-  const fiber = "fiber" in params ? params.fiber : node.fiber;
+  const fiber = "fiber" in params ? params.fiber : node.fiber!;
 
-  if (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);
+  // 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);
-  }
+  fibersInError.set(fiber.root!, error);
 
   const handled = _handleError(node, error);
   if (!handled) {

src/runtime/event_handling.ts

@@ -1,6 +1,6 @@
 import { filterOutModifiersFromData } from "./blockdom/config";
 import { STATUS } from "./status";
-import { OwlError } from "../common/owl_error";
+import { OwlError } from "./error_handling";
 
 export const mainEventHandler = (data: any, ev: Event, currentTarget?: EventTarget | null) => {
   const { data: _data, modifiers } = filterOutModifiersFromData(data);

src/runtime/executionContext.ts

@@ -1,26 +0,0 @@
-import { ExecutionContext } from "../common/types";
-
-export const executionContexts: ExecutionContext[] = [];
-(window as any).executionContexts = executionContexts;
-// export const scheduledContexts: Set<ExecutionContext> = new Set();
-
-export function getExecutionContext() {
-  return executionContexts[executionContexts.length - 1];
-}
-
-export function pushExecutionContext(context: ExecutionContext) {
-  executionContexts.push(context);
-}
-
-export function popExecutionContext() {
-  executionContexts.pop();
-}
-
-// export function makeExecutionContext({ update, meta }: { update: () => void; meta?: any }) {
-//   const executionContext: ExecutionContext = {
-//     update,
-//     atoms: new Set(),
-//     meta: meta || {},
-//   };
-//   return executionContext;
-// }

src/runtime/fibers.ts

@@ -1,10 +1,7 @@
 import { BDom, mount } from "./blockdom";
 import type { ComponentNode } from "./component_node";
-import { fibersInError } from "./error_handling";
-import { OwlError } from "../common/owl_error";
+import { fibersInError, OwlError } from "./error_handling";
 import { STATUS } from "./status";
-import { popTaskContext, pushTaskContext } from "./cancellableContext";
-import { popExecutionContext, pushExecutionContext } from "./executionContext";
 
 export function makeChildFiber(node: ComponentNode, parent: Fiber): Fiber {
   let current = node.fiber;
@@ -32,13 +29,6 @@ export function makeRootFiber(node: ComponentNode): Fiber {
       fibersInError.delete(current);
       fibersInError.delete(root);
       current.appliedToDom = false;
-      if (current instanceof RootFiber) {
-        // it is possible that this fiber is a fiber that crashed while being
-        // mounted, so the mounted list is possibly corrupted. We restore it to
-        // its normal initial state (which is empty list or a list with a mount
-        // fiber.
-        current.mounted = current instanceof MountFiber ? [current] : [];
-      }
     }
     return current;
   }
@@ -65,7 +55,8 @@ function cancelFibers(fibers: Fiber[]): number {
     let node = fiber.node;
     fiber.render = throwOnRender;
     if (node.status === STATUS.NEW) {
-      node.cancel();
+      node.destroy();
+      delete node.parent!.children[node.parentKey!];
     }
     node.fiber = null;
     if (fiber.bdom) {
@@ -135,16 +126,12 @@ export class Fiber {
     const node = this.node;
     const root = this.root;
     if (root) {
-      pushTaskContext(node.taskContext);
-      pushExecutionContext(node.executionContext);
       try {
         (this.bdom as any) = true;
         this.bdom = node.renderFn();
       } catch (e) {
         node.app.handleError({ node, error: e });
       }
-      popExecutionContext();
-      popTaskContext();
       root.setCounter(root.counter - 1);
     }
   }
@@ -165,7 +152,6 @@ export class RootFiber extends Fiber {
     const node = this.node;
     this.locked = true;
     let current: Fiber | undefined = undefined;
-    let mountedFibers = this.mounted;
     try {
       // Step 1: calling all willPatch lifecycle hooks
       for (current of this.willPatch) {
@@ -187,6 +173,7 @@ export class RootFiber extends Fiber {
       this.locked = false;
 
       // Step 4: calling all mounted lifecycle hooks
+      let mountedFibers = this.mounted;
       while ((current = mountedFibers.pop())) {
         current = current;
         if (current.appliedToDom) {
@@ -207,15 +194,6 @@ export class RootFiber extends Fiber {
         }
       }
     } catch (e) {
-      // if mountedFibers is not empty, this means that a crash occured while
-      // calling the mounted hooks of some component. So, there may still be
-      // some component that have been mounted, but for which the mounted hooks
-      // have not been called. Here, we remove the willUnmount hooks for these
-      // specific component to prevent a worse situation (willUnmount being
-      // called even though mounted has not been called)
-      for (let fiber of mountedFibers) {
-        fiber.node.willUnmount = [];
-      }
       this.locked = false;
       node.app.handleError({ fiber: current || this, error: e });
     }

src/runtime/hooks.ts

@@ -1,6 +1,5 @@
 import type { Env } from "./app";
 import { getCurrent } from "./component_node";
-import { popExecutionContext, pushExecutionContext } from "./executionContext";
 import { onMounted, onPatched, onWillUnmount } from "./lifecycle_hooks";
 import { inOwnerDocument } from "./utils";
 
@@ -60,70 +59,42 @@ export function useChildSubEnv(envExtension: Env) {
 // useEffect
 // -----------------------------------------------------------------------------
 
-type EffectDeps<T extends unknown[]> = T | (T extends [...infer H, never] ? EffectDeps<H> : never);
-
 /**
- * @template T
- * @param {...T} dependencies the dependencies computed by computeDependencies
+ * @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<T extends unknown[]> = (...dependencies: EffectDeps<T>) => void | (() => void);
+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.
  *
- * @template T
- * @param {Effect<T>} effect the effect to run on component mount and/or patch
- * @param {()=>[...T]} [computeDependencies=()=>[NaN]] a callback to compute
+ * @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<T extends unknown[]>(
-  effect: Effect<T>,
-  computeDependencies: () => [...T] = () => [NaN] as never
-) {
-  const context = getCurrent().component.__owl__.executionContext;
+export function useEffect(effect: Effect, computeDependencies: () => any[] = () => [NaN]) {
   let cleanup: (() => void) | void;
-  let dependencies: T;
-
-  const runEffect = () => {
-    pushExecutionContext(context);
-    try {
-      cleanup = effect(...dependencies);
-    } finally {
-      popExecutionContext();
-    }
-  };
-  const computeDependenciesWithContext = () => {
-    pushExecutionContext(context);
-    let r: any;
-    try {
-      r = computeDependencies();
-    } finally {
-      popExecutionContext();
-    }
-    return r;
-  };
-
+  let dependencies: any[];
   onMounted(() => {
-    dependencies = computeDependenciesWithContext();
-    runEffect();
+    dependencies = computeDependencies();
+    cleanup = effect(...dependencies);
   });
 
   onPatched(() => {
-    const newDeps = computeDependenciesWithContext();
-    const shouldReapply = newDeps.some((val: any, i: number) => val !== dependencies[i]);
+    const newDeps = computeDependencies();
+    const shouldReapply = newDeps.some((val, i) => val !== dependencies[i]);
     if (shouldReapply) {
       dependencies = newDeps;
       if (cleanup) {
         cleanup();
       }
-      runEffect();
+      cleanup = effect(...dependencies);
     }
   });
 

src/runtime/index.ts

@@ -39,9 +39,9 @@ export { Component } from "./component";
 export type { ComponentConstructor } from "./component";
 export { useComponent, useState } from "./component_node";
 export { status } from "./status";
-export { reactive, markRaw, toRaw, effect, withoutReactivity } from "./reactivity";
+export { reactive, markRaw, toRaw } from "./reactivity";
 export { useEffect, useEnv, useExternalListener, useRef, useChildSubEnv, useSubEnv } from "./hooks";
-export { batched, EventBus, htmlEscape, whenReady, loadFile, markup } from "./utils";
+export { EventBus, whenReady, loadFile, markup } from "./utils";
 export {
   onWillStart,
   onMounted,
@@ -55,7 +55,7 @@ export {
   onError,
 } from "./lifecycle_hooks";
 export { validate, validateType } from "./validation";
-export { OwlError } from "../common/owl_error";
+export { OwlError } from "./error_handling";
 
 export const __info__ = {
   version: App.version,

src/runtime/lifecycle_hooks.ts

@@ -1,52 +1,43 @@
 import { getCurrent } from "./component_node";
-import { nodeErrorHandlers } from "./error_handling";
-import { OwlError } from "../common/owl_error";
+import { nodeErrorHandlers, OwlError } from "./error_handling";
 
 const TIMEOUT = Symbol("timeout");
-const HOOK_TIMEOUT: { [key: string]: number } = {
-  onWillStart: 3000,
-  onWillUpdateProps: 3000,
-};
 function wrapError(fn: (...args: any[]) => any, hookName: string) {
-  const error = new OwlError() as Error & {
+  const error = new OwlError(`The following error occurred in ${hookName}: `) as Error & {
     cause: any;
   };
-  const timeoutError = new OwlError();
+  const timeoutError = new OwlError(`${hookName}'s promise hasn't resolved after 3 seconds`);
   const node = getCurrent();
   return (...args: any[]) => {
     const onError = (cause: any) => {
       error.cause = cause;
-      error.message =
-        cause instanceof Error
-          ? `The following error occurred in ${hookName}: "${cause.message}"`
-          : `Something that is not an Error was thrown in ${hookName} (see this Error's "cause" property)`;
+      if (cause instanceof Error) {
+        error.message += `"${cause.message}"`;
+      } else {
+        error.message = `Something that is not an Error was thrown in ${hookName} (see this Error's "cause" property)`;
+      }
       throw error;
     };
-    let result;
     try {
-      result = fn(...args);
+      const result = fn(...args);
+      if (result instanceof Promise) {
+        if (hookName === "onWillStart" || hookName === "onWillUpdateProps") {
+          const fiber = node.fiber;
+          Promise.race([
+            result.catch(() => {}),
+            new Promise((resolve) => setTimeout(() => resolve(TIMEOUT), 3000)),
+          ]).then((res) => {
+            if (res === TIMEOUT && node.fiber === fiber) {
+              console.warn(timeoutError);
+            }
+          });
+        }
+        return result.catch(onError);
+      }
+      return result;
     } catch (cause) {
       onError(cause);
     }
-    if (!(result instanceof Promise)) {
-      return result;
-    }
-    const timeout = HOOK_TIMEOUT[hookName];
-    if (timeout) {
-      const fiber = node.fiber;
-      Promise.race([
-        result.catch(() => {}),
-        new Promise((resolve) => setTimeout(() => resolve(TIMEOUT), timeout)),
-      ]).then((res) => {
-        if (res === TIMEOUT && node.fiber === fiber && node.status <= 2) {
-          timeoutError.message = `${hookName}'s promise hasn't resolved after ${
-            timeout / 1000
-          } seconds`;
-          console.log(timeoutError);
-        }
-      });
-    }
-    return result.catch(onError);
   };
 }
 

src/runtime/portal.ts

@@ -1,24 +1,38 @@
 import { onMounted, onWillUnmount } from "./lifecycle_hooks";
 import { BDom, text, VNode } from "./blockdom";
 import { Component } from "./component";
-import { OwlError } from "../common/owl_error";
+import { OwlError } from "./error_handling";
 
 const VText: any = text("").constructor;
 
+function getTarget(
+  currentParentEl: HTMLElement | Document,
+  selector: string,
+  isClosest: boolean
+): HTMLElement | null {
+  if (!isClosest || currentParentEl === document) {
+    return document.querySelector(selector);
+  }
+  const attempt = currentParentEl.querySelector(selector) as HTMLElement | null;
+  return attempt || getTarget(currentParentEl.parentElement!, selector, true);
+}
+
 class VPortal extends VText implements Partial<VNode<VPortal>> {
   content: BDom | null;
   selector: string;
+  isClosest: boolean;
   target: HTMLElement | null = null;
 
-  constructor(selector: string, content: BDom) {
+  constructor(selector: string, isClosest: boolean, content: BDom) {
     super("");
     this.selector = selector;
+    this.isClosest = isClosest;
     this.content = content;
   }
 
   mount(parent: HTMLElement, anchor: ChildNode) {
     super.mount(parent, anchor);
-    this.target = document.querySelector(this.selector) as any;
+    this.target = getTarget(parent, this.selector, this.isClosest);
     if (this.target) {
       this.content!.mount(this.target!, null);
     } else {
@@ -54,18 +68,21 @@ class VPortal extends VText implements Partial<VNode<VPortal>> {
 export function portalTemplate(app: any, bdom: any, helpers: any) {
   let { callSlot } = helpers;
   return function template(ctx: any, node: any, key = ""): any {
-    return new VPortal(ctx.props.target, callSlot(ctx, node, key, "default", false, null));
+    return new VPortal(
+      ctx.props.target,
+      ctx.props.isClosest,
+      callSlot(ctx, node, key, "default", false, null)
+    );
   };
 }
 
 export class Portal extends Component {
   static template = "__portal__";
   static props = {
-    target: {
-      type: String,
-    },
+    target: String,
+    isClosest: { type: Boolean, optional: true },
     slots: true,
-  } as const;
+  };
 
   setup() {
     const node: any = this.__owl__;
@@ -73,7 +90,7 @@ export class Portal extends Component {
     onMounted(() => {
       const portal: VPortal = node.bdom;
       if (!portal.target) {
-        const target: HTMLElement = document.querySelector(this.props.target);
+        const target = getTarget(portal.parentEl, this.props.target, this.props.isClosest);
         if (target) {
           portal.content!.moveBeforeDOMNode(target.firstChild, target);
         } else {

src/runtime/reactivity.ts

@@ -1,9 +1,13 @@
-import { OwlError } from "../common/owl_error";
-import { ExecutionContext, Atom, DerivedAtom, OldValue } from "../common/types";
-import { getExecutionContext, popExecutionContext, pushExecutionContext } from "./executionContext";
+import type { Callback } from "./utils";
+import { OwlError } from "./error_handling";
 
 // Special key to subscribe to, to be notified of key creation/deletion
 const KEYCHANGES = Symbol("Key changes");
+// Used to specify the absence of a callback, can be used as WeakMap key but
+// should only be used as a sentinel value and never called.
+const NO_CALLBACK = () => {
+  throw new Error("Called NO_CALLBACK. Owl is broken, please report this to the maintainers.");
+};
 
 // The following types only exist to signify places where objects are expected
 // to be reactive or not, they provide no type checking benefit over "object"
@@ -16,9 +20,8 @@ type CollectionRawType = "Set" | "Map" | "WeakMap";
 const objectToString = Object.prototype.toString;
 const objectHasOwnProperty = Object.prototype.hasOwnProperty;
 
-// Use arrays because Array.includes is faster than Set.has for small arrays
-const SUPPORTED_RAW_TYPES = ["Object", "Array", "Set", "Map", "WeakMap"];
-const COLLECTION_RAW_TYPES = ["Set", "Map", "WeakMap"];
+const SUPPORTED_RAW_TYPES = new Set(["Object", "Array", "Set", "Map", "WeakMap"]);
+const COLLECTION_RAWTYPES = new Set(["Set", "Map", "WeakMap"]);
 
 /**
  * extract "RawType" from strings like "[object RawType]" => this lets us ignore
@@ -42,7 +45,7 @@ function canBeMadeReactive(value: any): boolean {
   if (typeof value !== "object") {
     return false;
   }
-  return SUPPORTED_RAW_TYPES.includes(rawType(value));
+  return SUPPORTED_RAW_TYPES.has(rawType(value));
 }
 /**
  * Creates a reactive from the given object/callback if possible and returns it,
@@ -51,8 +54,8 @@ function canBeMadeReactive(value: any): boolean {
  * @param value the value make reactive
  * @returns a reactive for the given object when possible, the original otherwise
  */
-function possiblyReactive(val: any) {
-  return canBeMadeReactive(val) ? reactive(val) : val;
+function possiblyReactive(val: any, cb: Callback) {
+  return canBeMadeReactive(val) ? reactive(val, cb) : val;
 }
 
 const skipped = new WeakSet<Target>();
@@ -77,37 +80,7 @@ export function toRaw<T extends Target, U extends Reactive<T>>(value: U | T): T
   return targets.has(value) ? (targets.get(value) as T) : value;
 }
 
-const targetToKeysToAtomItem = new WeakMap<Target, Map<PropertyKey, Atom>>();
-const scheduledAtoms = new Set<Atom>();
-
-function makeAtom(getValue: () => any): Atom {
-  const atom: Atom = {
-    executionContexts: new Set<ExecutionContext>(),
-    dependents: new Set<Atom>(),
-    // getValue,
-  };
-  return atom;
-}
-
-function getTargetKeyAtom(target: Target, key: PropertyKey): Atom {
-  let keyToAtomItem: Map<PropertyKey, Atom> = targetToKeysToAtomItem.get(target)!;
-  if (!keyToAtomItem) {
-    keyToAtomItem = new Map();
-    targetToKeysToAtomItem.set(target, keyToAtomItem);
-  }
-  let atom = keyToAtomItem.get(key)!;
-  if (!atom) {
-    atom = makeAtom(() => Reflect.get(target, key));
-    keyToAtomItem.set(key, atom);
-  }
-  return atom;
-}
-
-export function addAtomToContext(atom: Atom, executionContext: ExecutionContext) {
-  executionContext.atoms.add(atom);
-  atom.executionContexts.add(executionContext);
-}
-
+const targetToKeysToCallbacks = new WeakMap<Target, Map<PropertyKey, 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.
@@ -117,73 +90,23 @@ export function addAtomToContext(atom: Atom, executionContext: ExecutionContext)
  *  or deletion)
  * @param callback the function to call when the key changes
  */
-function onReadTargetKey(target: Target, key: PropertyKey, receiver: any): void {
-  const executionContext = getExecutionContext();
-  executionContext?.onReadAtom(getTargetKeyAtom(target, key));
-}
-
-let scheduled = false;
-function scheduleAtom(atom: Atom) {
-  scheduledAtoms.add(atom);
-  // batched(processAtoms)();
-  if (scheduled) return;
-  scheduled = true;
-  Promise.resolve().then(() => {
-    scheduled = false;
-    processAtoms();
-  });
-}
-
-function processDerivedAtoms() {
-  const processedAtoms = new Set<Atom>();
-  for (const atom of scheduledAtoms) {
-    for (const dep of atom.dependents) {
-      if (processedAtoms.has(dep)) continue;
-      dep.computed = false;
-      processedAtoms.add(dep);
-    }
+function observeTargetKey(target: Target, key: PropertyKey, callback: Callback): void {
+  if (callback === NO_CALLBACK) {
+    return;
   }
-}
-
-function processAtoms() {
-  processDerivedAtoms();
-
-  const scheduledContexts = new Set(
-    [...scheduledAtoms.values()].map((s) => [...s.executionContexts]).flat()
-  );
-
-  // schedule before context.update in case there is write operations during update
-  // todo: add a test in case there is write operations during update the test
-  // will break is scheduledAtoms.clear(); is called after context.update();
-  // that writes
-  scheduledAtoms.clear();
-  for (const ctx of [...scheduledContexts]) {
-    removeAtomsFromContext(ctx);
-    // custom unsubscribe depending on the context.
-    // scheduledContexts might be updated while we're iterating over it.
-    ctx.unsubcribe?.(scheduledContexts);
+  if (!targetToKeysToCallbacks.get(target)) {
+    targetToKeysToCallbacks.set(target, new Map());
   }
-
-  for (const context of scheduledContexts) {
-    pushExecutionContext(context);
-    try {
-      context.update?.();
-    } finally {
-      popExecutionContext();
-    }
+  const keyToCallbacks = targetToKeysToCallbacks.get(target)!;
+  if (!keyToCallbacks.get(key)) {
+    keyToCallbacks.set(key, new Set());
   }
-}
-
-/**
- * Notify Reactives that are observing a given target that a key has changed on
-      }
-    });
-  };
-  for (const context of executionContexts) {
-    context.update();
+  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.
@@ -193,21 +116,66 @@ function processAtoms() {
  * @param key the key that changed (or Symbol `KEYCHANGES` if a key was created
  *   or deleted)
  */
-function onWriteTargetKey(target: Target, key: PropertyKey): void {
-  const keyToAtomItem = targetToKeysToAtomItem.get(target)!;
-  if (!keyToAtomItem) {
+function notifyReactives(target: Target, key: PropertyKey): void {
+  const keyToCallbacks = targetToKeysToCallbacks.get(target);
+  if (!keyToCallbacks) {
     return;
   }
-  const atom = keyToAtomItem.get(key);
-  if (!atom) {
+  const callbacks = keyToCallbacks.get(key);
+  if (!callbacks) {
     return;
   }
-  scheduleAtom(atom);
+  // Loop on copy because clearReactivesForCallback will modify the set in place
+  for (const callback of [...callbacks]) {
+    clearReactivesForCallback(callback);
+    callback();
+  }
 }
 
+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
+ */
+export function clearReactivesForCallback(callback: Callback): void {
+  const targetsToClear = callbacksToTargets.get(callback);
+  if (!targetsToClear) {
+    return;
+  }
+  for (const target of targetsToClear) {
+    const observedKeys = targetToKeysToCallbacks.get(target);
+    if (!observedKeys) {
+      continue;
+    }
+    for (const [key, callbacks] of observedKeys.entries()) {
+      callbacks.delete(callback);
+      if (!callbacks.size) {
+        observedKeys.delete(key);
+      }
+    }
+  }
+  targetsToClear.clear();
+}
+
+export function getSubscriptions(callback: Callback) {
+  const targets = callbacksToTargets.get(callback) || [];
+  return [...targets].map((target) => {
+    const keysToCallbacks = targetToKeysToCallbacks.get(target);
+    let keys = [];
+    if (keysToCallbacks) {
+      for (const [key, cbs] of keysToCallbacks) {
+        if (cbs.has(callback)) {
+          keys.push(key);
+        }
+      }
+    }
+    return { target, keys };
+  });
+}
 // Maps reactive objects to the underlying target
 export const targets = new WeakMap<Reactive<Target>, Target>();
-const reactiveCache = new WeakMap<Target, Reactive<Target>>();
+const reactiveCache = new WeakMap<Target, WeakMap<Callback, Reactive<Target>>>();
 /**
  * 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
@@ -235,7 +203,7 @@ const reactiveCache = new WeakMap<Target, Reactive<Target>>();
  *  reactive has changed
  * @returns a proxy that tracks changes to it
  */
-export function reactive<T extends Target>(target: T): T {
+export function reactive<T extends Target>(target: T, callback: Callback = NO_CALLBACK): T {
   if (!canBeMadeReactive(target)) {
     throw new OwlError(`Cannot make the given value reactive`);
   }
@@ -244,130 +212,30 @@ export function reactive<T extends Target>(target: T): T {
   }
   if (targets.has(target)) {
     // target is reactive, create a reactive on the underlying object instead
-    // return reactive(targets.get(target) as T);
-    return target;
+    return reactive(targets.get(target) as T, callback);
   }
-  const reactive = reactiveCache.get(target)!;
-  if (reactive) return reactive as T;
-
-  const targetRawType = rawType(target);
-  const handler = COLLECTION_RAW_TYPES.includes(targetRawType)
-    ? collectionsProxyHandler(target as Collection, targetRawType as CollectionRawType)
-    : basicProxyHandler<T>();
-  const proxy = new Proxy(target, handler as ProxyHandler<T>) as Reactive<T>;
-
-  reactiveCache.set(target, proxy);
-  targets.set(proxy, target);
-
-  return proxy;
+  if (!reactiveCache.has(target)) {
+    reactiveCache.set(target, new WeakMap());
+  }
+  const reactivesForTarget = reactiveCache.get(target)!;
+  if (!reactivesForTarget.has(callback)) {
+    const targetRawType = rawType(target);
+    const handler = COLLECTION_RAWTYPES.has(targetRawType)
+      ? collectionsProxyHandler(target as Collection, callback, targetRawType as CollectionRawType)
+      : basicProxyHandler<T>(callback);
+    const proxy = new Proxy(target, handler as ProxyHandler<T>) as Reactive<T>;
+    reactivesForTarget.set(callback, proxy);
+    targets.set(proxy, target);
+  }
+  return reactivesForTarget.get(callback) as Reactive<T>;
 }
-function removeAtomsFromContext(executionContext: ExecutionContext) {
-  for (const sig of executionContext.atoms) {
-    sig.executionContexts.delete(executionContext);
-  }
-  executionContext.atoms.clear();
-}
-/**
- * Unsubscribe an execution context and all its children from all atoms
- * they are subscribed to.
- *
- * @param parentExecutionContext the context to unsubscribe
- */
-function unsubscribeChildEffect(
-  parentExecutionContext: ExecutionContext,
-  scheduledContexts: Set<ExecutionContext>
-) {
-  // executionContext.update = () => {};
-
-  for (const children of parentExecutionContext.meta.children) {
-    children.meta.parent = undefined;
-    removeAtomsFromContext(children);
-    scheduledContexts.delete(children);
-    unsubscribeChildEffect(children, scheduledContexts);
-  }
-  parentExecutionContext.meta.children.length = 0;
-}
-export function withoutReactivity<T extends (...args: any[]) => any>(fn: T): ReturnType<T> {
-  pushExecutionContext(undefined!);
-  let r: ReturnType<T>;
-  try {
-    r = fn();
-  } finally {
-    popExecutionContext();
-  }
-  return r;
-}
-
-export function effect(fn: Function) {
-  let parent = getExecutionContext();
-  // todo: is it useful?
-  if (parent && !parent?.meta.children) {
-    parent = undefined!;
-  }
-  const executionContext: ExecutionContext = {
-    unsubcribe: (scheduledContexts: Set<ExecutionContext>) => {
-      unsubscribeChildEffect(executionContext, scheduledContexts);
-    },
-    update: fn,
-    onReadAtom: (atom: Atom) => addAtomToContext(atom, executionContext),
-    atoms: new Set(),
-    meta: {
-      parent: parent,
-      children: [],
-    },
-  };
-  if (parent) {
-    // todo: is it useful?
-    parent.meta.children?.push?.(executionContext);
-  }
-  pushExecutionContext(executionContext);
-  try {
-    fn();
-  } finally {
-    popExecutionContext();
-  }
-}
-
-export function derived(fn: Function) {
-  let lastValue: any;
-
-  const derivedAtom: DerivedAtom = {
-    executionContexts: new Set<ExecutionContext>(),
-    dependents: new Set<Atom>(),
-    dependencies: new Map<Atom, OldValue>(),
-    getValue: () => lastValue,
-    computed: false,
-  };
-
-  return () => {
-    const executionContext = getExecutionContext();
-    executionContext?.onReadAtom(derivedAtom);
-    if (derivedAtom.computed) return lastValue;
-
-    const derivedExecutionContext: ExecutionContext = {
-      onReadAtom: (atom: Atom) => {
-        atom.dependents.add(derivedAtom);
-        // derivedAtom.executionContexts.add(executionContext);
-      },
-    };
-    pushExecutionContext(derivedExecutionContext);
-    try {
-      lastValue = fn();
-    } finally {
-      popExecutionContext();
-    }
-    derivedAtom.computed = true;
-    return lastValue;
-  };
-}
-
 /**
  * Creates a basic proxy handler for regular objects and arrays.
  *
  * @param callback @see reactive
  * @returns a proxy handler object
  */
-function basicProxyHandler<T extends Target>(): ProxyHandler<T> {
+function basicProxyHandler<T extends Target>(callback: Callback): ProxyHandler<T> {
   return {
     get(target, key, receiver) {
       // non-writable non-configurable properties cannot be made reactive
@@ -375,15 +243,15 @@ function basicProxyHandler<T extends Target>(): ProxyHandler<T> {
       if (desc && !desc.writable && !desc.configurable) {
         return Reflect.get(target, key, receiver);
       }
-      onReadTargetKey(target, key);
-      return possiblyReactive(Reflect.get(target, key, receiver));
+      observeTargetKey(target, key, callback);
+      return possiblyReactive(Reflect.get(target, key, receiver), callback);
     },
     set(target, key, value, receiver) {
       const hadKey = objectHasOwnProperty.call(target, key);
       const originalValue = Reflect.get(target, key, receiver);
-      const ret = Reflect.set(target, key, toRaw(value), receiver);
+      const ret = Reflect.set(target, key, value, receiver);
       if (!hadKey && objectHasOwnProperty.call(target, key)) {
-        onWriteTargetKey(target, KEYCHANGES);
+        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
@@ -392,26 +260,26 @@ function basicProxyHandler<T extends Target>(): ProxyHandler<T> {
         originalValue !== Reflect.get(target, key, receiver) ||
         (key === "length" && Array.isArray(target))
       ) {
-        onWriteTargetKey(target, key);
+        notifyReactives(target, key);
       }
       return ret;
     },
     deleteProperty(target, key) {
       const ret = Reflect.deleteProperty(target, key);
       // TODO: only notify when something was actually deleted
-      onWriteTargetKey(target, KEYCHANGES);
-      onWriteTargetKey(target, key);
+      notifyReactives(target, KEYCHANGES);
+      notifyReactives(target, key);
       return ret;
     },
     ownKeys(target) {
-      onReadTargetKey(target, KEYCHANGES);
+      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
       // observing the key itself would observe value changes instead of presence changes
       // so we may need a finer grained system to distinguish observing value vs presence.
-      onReadTargetKey(target, KEYCHANGES);
+      observeTargetKey(target, KEYCHANGES, callback);
       return Reflect.has(target, key);
     },
   } as ProxyHandler<T>;
@@ -424,11 +292,11 @@ function basicProxyHandler<T extends Target>(): ProxyHandler<T> {
  * @param target @see reactive
  * @param callback @see reactive
  */
-function makeKeyObserver(methodName: "has" | "get", target: any) {
+function makeKeyObserver(methodName: "has" | "get", target: any, callback: Callback) {
   return (key: any) => {
     key = toRaw(key);
-    onReadTargetKey(target, key);
-    return possiblyReactive(target[methodName](key));
+    observeTargetKey(target, key, callback);
+    return possiblyReactive(target[methodName](key), callback);
   };
 }
 /**
@@ -441,15 +309,16 @@ function makeKeyObserver(methodName: "has" | "get", target: any) {
  */
 function makeIteratorObserver(
   methodName: "keys" | "values" | "entries" | typeof Symbol.iterator,
-  target: any
+  target: any,
+  callback: Callback
 ) {
   return function* () {
-    onReadTargetKey(target, KEYCHANGES);
+    observeTargetKey(target, KEYCHANGES, callback);
     const keys = target.keys();
     for (const item of target[methodName]()) {
       const key = keys.next().value;
-      onReadTargetKey(target, key);
-      yield possiblyReactive(item);
+      observeTargetKey(target, key, callback);
+      yield possiblyReactive(item, callback);
     }
   };
 }
@@ -461,16 +330,16 @@ function makeIteratorObserver(
  * @param target @see reactive
  * @param callback @see reactive
  */
-function makeForEachObserver(target: any) {
+function makeForEachObserver(target: any, callback: Callback) {
   return function forEach(forEachCb: (val: any, key: any, target: any) => void, thisArg: any) {
-    onReadTargetKey(target, KEYCHANGES);
+    observeTargetKey(target, KEYCHANGES, callback);
     target.forEach(function (val: any, key: any, targetObj: any) {
-      onReadTargetKey(target, key);
+      observeTargetKey(target, key, callback);
       forEachCb.call(
         thisArg,
-        possiblyReactive(val),
-        possiblyReactive(key),
-        possiblyReactive(targetObj)
+        possiblyReactive(val, callback),
+        possiblyReactive(key, callback),
+        possiblyReactive(targetObj, callback)
       );
     }, thisArg);
   };
@@ -497,10 +366,10 @@ function delegateAndNotify(
     const ret = target[setterName](key, value);
     const hasKey = target.has(key);
     if (hadKey !== hasKey) {
-      onWriteTargetKey(target, KEYCHANGES);
+      notifyReactives(target, KEYCHANGES);
     }
-    if (originalValue !== target[getterName](key)) {
-      onWriteTargetKey(target, key);
+    if (originalValue !== value) {
+      notifyReactives(target, key);
     }
     return ret;
   };
@@ -515,9 +384,9 @@ function makeClearNotifier(target: Map<any, any> | Set<any>) {
   return () => {
     const allKeys = [...target.keys()];
     target.clear();
-    onWriteTargetKey(target, KEYCHANGES);
+    notifyReactives(target, KEYCHANGES);
     for (const key of allKeys) {
-      onWriteTargetKey(target, key);
+      notifyReactives(target, key);
     }
   };
 }
@@ -529,40 +398,40 @@ function makeClearNotifier(target: Map<any, any> | Set<any>) {
  * reactives that the key which is being added or deleted has been modified.
  */
 const rawTypeToFuncHandlers = {
-  Set: (target: any) => ({
-    has: makeKeyObserver("has", target),
+  Set: (target: any, callback: Callback) => ({
+    has: makeKeyObserver("has", target, callback),
     add: delegateAndNotify("add", "has", target),
     delete: delegateAndNotify("delete", "has", target),
-    keys: makeIteratorObserver("keys", target),
-    values: makeIteratorObserver("values", target),
-    entries: makeIteratorObserver("entries", target),
-    [Symbol.iterator]: makeIteratorObserver(Symbol.iterator, target),
-    forEach: makeForEachObserver(target),
+    keys: makeIteratorObserver("keys", target, callback),
+    values: makeIteratorObserver("values", target, callback),
+    entries: makeIteratorObserver("entries", target, callback),
+    [Symbol.iterator]: makeIteratorObserver(Symbol.iterator, target, callback),
+    forEach: makeForEachObserver(target, callback),
     clear: makeClearNotifier(target),
     get size() {
-      onReadTargetKey(target, KEYCHANGES);
+      observeTargetKey(target, KEYCHANGES, callback);
       return target.size;
     },
   }),
-  Map: (target: any) => ({
-    has: makeKeyObserver("has", target),
-    get: makeKeyObserver("get", target),
+  Map: (target: any, callback: Callback) => ({
+    has: makeKeyObserver("has", target, callback),
+    get: makeKeyObserver("get", target, callback),
     set: delegateAndNotify("set", "get", target),
     delete: delegateAndNotify("delete", "has", target),
-    keys: makeIteratorObserver("keys", target),
-    values: makeIteratorObserver("values", target),
-    entries: makeIteratorObserver("entries", target),
-    [Symbol.iterator]: makeIteratorObserver(Symbol.iterator, target),
-    forEach: makeForEachObserver(target),
+    keys: makeIteratorObserver("keys", target, callback),
+    values: makeIteratorObserver("values", target, callback),
+    entries: makeIteratorObserver("entries", target, callback),
+    [Symbol.iterator]: makeIteratorObserver(Symbol.iterator, target, callback),
+    forEach: makeForEachObserver(target, callback),
     clear: makeClearNotifier(target),
     get size() {
-      onReadTargetKey(target, KEYCHANGES);
+      observeTargetKey(target, KEYCHANGES, callback);
       return target.size;
     },
   }),
-  WeakMap: (target: any) => ({
-    has: makeKeyObserver("has", target),
-    get: makeKeyObserver("get", target),
+  WeakMap: (target: any, callback: Callback) => ({
+    has: makeKeyObserver("has", target, callback),
+    get: makeKeyObserver("get", target, callback),
     set: delegateAndNotify("set", "get", target),
     delete: delegateAndNotify("delete", "has", target),
   }),
@@ -576,19 +445,20 @@ const rawTypeToFuncHandlers = {
  */
 function collectionsProxyHandler<T extends Collection>(
   target: T,
+  callback: Callback,
   targetRawType: CollectionRawType
 ): ProxyHandler<T> {
   // TODO: if performance is an issue we can create the special handlers lazily when each
   // property is read.
-  const specialHandlers = rawTypeToFuncHandlers[targetRawType](target);
-  return Object.assign(basicProxyHandler(), {
+  const specialHandlers = rawTypeToFuncHandlers[targetRawType](target, callback);
+  return Object.assign(basicProxyHandler(callback), {
     // FIXME: probably broken when part of prototype chain since we ignore the receiver
     get(target: any, key: PropertyKey) {
       if (objectHasOwnProperty.call(specialHandlers, key)) {
         return (specialHandlers as any)[key];
       }
-      onReadTargetKey(target, key);
-      return possiblyReactive(target[key]);
+      observeTargetKey(target, key, callback);
+      return possiblyReactive(target[key], callback);
     },
   }) as ProxyHandler<T>;
 }

src/runtime/scheduler.ts

@@ -1,4 +1,3 @@
-import type { ComponentNode } from "./component_node";
 import { fibersInError } from "./error_handling";
 import { Fiber, RootFiber } from "./fibers";
 import { STATUS } from "./status";
@@ -15,8 +14,6 @@ export class Scheduler {
   requestAnimationFrame: Window["requestAnimationFrame"];
   frame: number = 0;
   delayedRenders: Fiber[] = [];
-  cancelledNodes: Set<ComponentNode> = new Set();
-  processing = false;
 
   constructor() {
     this.requestAnimationFrame = Scheduler.requestAnimationFrame;
@@ -26,13 +23,6 @@ export class Scheduler {
     this.tasks.add(fiber.root!);
   }
 
-  scheduleDestroy(node: ComponentNode) {
-    this.cancelledNodes.add(node);
-    if (this.frame === 0) {
-      this.frame = this.requestAnimationFrame(() => this.processTasks());
-    }
-  }
-
   /**
    * Process all current tasks. This only applies to the fibers that are ready.
    * Other tasks are left unchanged.
@@ -49,31 +39,18 @@ export class Scheduler {
     }
 
     if (this.frame === 0) {
-      this.frame = this.requestAnimationFrame(() => this.processTasks());
+      this.frame = this.requestAnimationFrame(() => {
+        this.frame = 0;
+        this.tasks.forEach((fiber) => this.processFiber(fiber));
+        for (let task of this.tasks) {
+          if (task.node.status === STATUS.DESTROYED) {
+            this.tasks.delete(task);
+          }
+        }
+      });
     }
   }
 
-  processTasks() {
-    if (this.processing) {
-      return;
-    }
-    this.processing = true;
-    this.frame = 0;
-    for (let node of this.cancelledNodes) {
-      node._destroy();
-    }
-    this.cancelledNodes.clear();
-    for (let task of this.tasks) {
-      this.processFiber(task);
-    }
-    for (let task of this.tasks) {
-      if (task.node.status === STATUS.DESTROYED) {
-        this.tasks.delete(task);
-      }
-    }
-    this.processing = false;
-  }
-
   processFiber(fiber: RootFiber) {
     if (fiber.root !== fiber) {
       this.tasks.delete(fiber);
@@ -93,14 +70,7 @@ export class Scheduler {
       if (!hasError) {
         fiber.complete();
       }
-      // at this point, the fiber should have been applied to the DOM, so we can
-      // remove it from the task list. If it is not the case, it means that there
-      // was an error and an error handler triggered a new rendering that recycled
-      // the fiber, so in that case, we actually want to keep the fiber around,
-      // otherwise it will just be ignored.
-      if (fiber.appliedToDom) {
-        this.tasks.delete(fiber);
-      }
+      this.tasks.delete(fiber);
     }
   }
 }

src/runtime/status.ts

@@ -7,20 +7,15 @@ import type { Component } from "./component";
 export const enum STATUS {
   NEW,
   MOUNTED, // is ready, and in DOM. It has a valid el
-  // component has been created, but has been replaced by a newer component before being mounted
-  // it is cancelled until the next animation frame where it will be destroyed
-  CANCELLED,
   DESTROYED,
 }
 
-type STATUS_DESCR = "new" | "mounted" | "cancelled" | "destroyed";
+type STATUS_DESCR = "new" | "mounted" | "destroyed";
 
 export function status(component: Component): STATUS_DESCR {
   switch (component.__owl__.status) {
     case STATUS.NEW:
       return "new";
-    case STATUS.CANCELLED:
-      return "cancelled";
     case STATUS.MOUNTED:
       return "mounted";
     case STATUS.DESTROYED:

src/runtime/task.ts

@@ -1,72 +0,0 @@
-import { getTaskContext, TaskContext, useTaskContext } from "./cancellableContext";
-
-export class Task<T = any> {
-  _promise: Promise<T>;
-  _ctx?: TaskContext = getTaskContext();
-
-  constructor(
-    executor: (resolve: (value: T | PromiseLike<T>) => void, reject: (reason: any) => void) => void,
-    public _onCancelled?: Function
-  ) {
-    if (!this._ctx) {
-      this._promise = new Promise(executor);
-      return;
-    }
-
-    this._promise = new Promise((resolve, reject) => {
-      try {
-        executor(
-          (value: T | PromiseLike<T>) => {
-            if (!this._ctx?.isCancelled) resolve(value);
-          },
-          (error: any) => {
-            if (!this._ctx?.isCancelled) reject(error);
-          }
-        );
-      } catch (err) {
-        if (!this._ctx?.isCancelled) reject(err);
-      }
-    });
-  }
-
-  then(onFulfilled: (value: any) => any, onRejected: (error: any) => any) {
-    if (!this._ctx) return this._promise.then(onFulfilled, onRejected);
-    return this._promise.then((v) => {
-      if (this._ctx!.isCancelled) return;
-      let cleanup: Function;
-      Promise.resolve().then(() => {
-        const ctx = useTaskContext(this._ctx);
-        cleanup = ctx.cleanup;
-      });
-      const result = onFulfilled(v);
-      Promise.resolve().then(() => {
-        cleanup();
-      });
-      return result;
-    }, onRejected);
-  }
-
-  catch(onRejected: (error: any) => any) {
-    return this._promise.catch(onRejected);
-  }
-
-  finally(onFinally: () => any) {
-    return this._promise.finally(onFinally);
-  }
-
-  cancel() {
-    if (this._onCancelled) {
-      this._onCancelled();
-    }
-  }
-
-  get [Symbol.toStringTag]() {
-    return "Promise";
-  }
-
-  //   static all(tasks) {
-  //     return new Task((resolve, reject) => {
-  //       Promise.all(tasks.map((t) => (t instanceof Task ? t._promise : t))).then(resolve, reject);
-  //     });
-  //   }
-}

src/runtime/template_helpers.ts

@@ -4,7 +4,7 @@ import { html } from "./blockdom/index";
 import { isOptional, validateSchema } from "./validation";
 import type { ComponentConstructor } from "./component";
 import { markRaw } from "./reactivity";
-import { OwlError } from "../common/owl_error";
+import { OwlError } from "./error_handling";
 import type { ComponentNode } from "./component_node";
 
 const ObjectCreate = Object.create;
@@ -60,24 +60,18 @@ function withKey(elem: any, k: string) {
   return elem;
 }
 
-function prepareList(collection: unknown): [unknown[], unknown[], number, undefined[]] {
-  let keys: unknown[];
-  let values: unknown[];
+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 instanceof Map) {
-    keys = [...collection.keys()];
-    values = [...collection.values()];
-  } else if (Symbol.iterator in Object(collection)) {
-    keys = [...(<Iterable<unknown>>collection)];
-    values = keys;
-  } else if (collection && typeof collection === "object") {
-    values = Object.values(collection);
-    keys = Object.keys(collection);
+  } else if (collection) {
+    values = Object.keys(collection);
+    keys = Object.values(collection);
   } else {
-    throw new OwlError(`Invalid loop expression: "${collection}" is not iterable`);
+    throw new OwlError("Invalid loop expression");
   }
   const n = values.length;
   return [keys, values, n, new Array(n)];

src/runtime/template_set.ts

@@ -3,20 +3,45 @@ import { comment, createBlock, html, list, multi, text, toggler } from "./blockd
 import { getCurrent } from "./component_node";
 import { Portal, portalTemplate } from "./portal";
 import { helpers } from "./template_helpers";
-import { OwlError } from "../common/owl_error";
-import { parseXML } from "../common/utils";
-import type { customDirectives } from "../common/types";
+import { OwlError } from "./error_handling";
 
 const bdom = { text, createBlock, list, multi, html, toggler, comment };
 
+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 OwlError(msg);
+  }
+  return doc;
+}
+
 export interface TemplateSetConfig {
   dev?: boolean;
   translatableAttributes?: string[];
-  translateFn?: (s: string, translationCtx: string) => string;
-  templates?: string | Document | Record<string, string>;
-  getTemplate?: (s: string) => Element | Function | string | void;
-  customDirectives?: customDirectives;
-  globalValues?: object;
+  translateFn?: (s: string) => string;
+  templates?: string | Document;
 }
 
 export class TemplateSet {
@@ -26,39 +51,21 @@ export class TemplateSet {
   dev: boolean;
   rawTemplates: typeof globalTemplates = Object.create(globalTemplates);
   templates: { [name: string]: Template } = {};
-  getRawTemplate?: (s: string) => Element | Function | string | void;
-  translateFn?: (s: string, translationCtx: string) => string;
+  translateFn?: (s: string) => string;
   translatableAttributes?: string[];
   Portal = Portal;
-  customDirectives: customDirectives;
-  runtimeUtils: object;
-  hasGlobalValues: boolean;
 
   constructor(config: TemplateSetConfig = {}) {
     this.dev = config.dev || false;
     this.translateFn = config.translateFn;
     this.translatableAttributes = config.translatableAttributes;
     if (config.templates) {
-      if (config.templates instanceof Document || typeof config.templates === "string") {
-        this.addTemplates(config.templates);
-      } else {
-        for (const name in config.templates) {
-          this.addTemplate(name, config.templates[name]);
-        }
-      }
+      this.addTemplates(config.templates);
     }
-    this.getRawTemplate = config.getTemplate;
-    this.customDirectives = config.customDirectives || {};
-    this.runtimeUtils = { ...helpers, __globals__: config.globalValues || {} };
-    this.hasGlobalValues = Boolean(config.globalValues && Object.keys(config.globalValues).length);
   }
 
   addTemplate(name: string, template: string | Element) {
     if (name in this.rawTemplates) {
-      // this check can be expensive, just silently ignore double definitions outside dev mode
-      if (!this.dev) {
-        return;
-      }
       const rawTemplate = this.rawTemplates[name];
       const currentAsString =
         typeof rawTemplate === "string"
@@ -89,7 +96,7 @@ export class TemplateSet {
 
   getTemplate(name: string): Template {
     if (!(name in this.templates)) {
-      const rawTemplate = this.getRawTemplate?.(name) || this.rawTemplates[name];
+      const rawTemplate = this.rawTemplates[name];
       if (rawTemplate === undefined) {
         let extraInfo = "";
         try {
@@ -106,7 +113,7 @@ export class TemplateSet {
       this.templates[name] = function (context, parent) {
         return templates[name].call(this, context, parent);
       };
-      const template = templateFn(this, bdom, this.runtimeUtils);
+      const template = templateFn(this, bdom, helpers);
       this.templates[name] = template;
     }
     return this.templates[name];

src/runtime/utils.ts

@@ -1,4 +1,4 @@
-import { OwlError } from "../common/owl_error";
+import { OwlError } from "./error_handling";
 export type Callback = () => void;
 
 /**
@@ -9,13 +9,20 @@ export type Callback = () => void;
  * @returns a batched version of the original callback
  */
 export function batched(callback: Callback): Callback {
-  let scheduled = false;
-  return async (...args) => {
-    if (!scheduled) {
-      scheduled = true;
-      await Promise.resolve();
-      scheduled = false;
-      callback(...args);
+  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;
+      // 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.
+      // Schedule this before calling the callback so that calls to the batched function
+      // within the callback will proceed only after resetting called to false, and have
+      // a chance to execute the callback again
+      Promise.resolve().then(() => (called = false));
+      callback();
     }
   };
 }
@@ -35,43 +42,13 @@ export function inOwnerDocument(el?: HTMLElement) {
   return rootNode instanceof ShadowRoot && el.ownerDocument.contains(rootNode.host);
 }
 
-/**
- * Determine whether the given element is contained in a specific root documnet:
- * either directly or with a shadow root in between or in an iframe.
- */
-function isAttachedToDocument(
-  element: HTMLElement | ShadowRoot,
-  documentElement: Document
-): boolean {
-  let current: Node = element;
-  const shadowRoot = documentElement.defaultView!.ShadowRoot;
-  while (current) {
-    if (current === documentElement) {
-      return true;
-    }
-    if (current.parentNode) {
-      current = current.parentNode;
-    } else if (current instanceof shadowRoot && current.host) {
-      current = current.host;
-    } else {
-      return false;
-    }
-  }
-  return false;
-}
-
 export function validateTarget(target: HTMLElement | ShadowRoot) {
   // Get the document and HTMLElement corresponding to the target to allow mounting in iframes
   const document = target && target.ownerDocument;
   if (document) {
-    if (!document.defaultView) {
-      throw new OwlError(
-        "Cannot mount a component: the target document is not attached to a window (defaultView is missing)"
-      );
-    }
-    const HTMLElement = document.defaultView.HTMLElement;
+    const HTMLElement = document.defaultView!.HTMLElement;
     if (target instanceof HTMLElement || target instanceof ShadowRoot) {
-      if (!isAttachedToDocument(target, document)) {
+      if (!document.body.contains(target instanceof HTMLElement ? target : target.host)) {
         throw new OwlError("Cannot mount a component on a detached dom node");
       }
       return;
@@ -111,50 +88,10 @@ export async function loadFile(url: string): Promise<string> {
  */
 export class Markup extends String {}
 
-export function htmlEscape(str: any): Markup {
-  if (str instanceof Markup) {
-    return str;
-  }
-  if (str === undefined) {
-    return markup("");
-  }
-  if (typeof str === "number") {
-    return markup(String(str));
-  }
-  [
-    ["&", "&amp;"],
-    ["<", "&lt;"],
-    [">", "&gt;"],
-    ["'", "&#x27;"],
-    ['"', "&quot;"],
-    ["`", "&#x60;"],
-  ].forEach((pairs) => {
-    str = String(str).replace(new RegExp(pairs[0], "g"), pairs[1]);
-  });
-  return markup(str);
-}
-
 /*
  * 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.
- *
- * If called as a tag function, the interpolated strings are escaped.
  */
-export function markup(strings: TemplateStringsArray, ...placeholders: unknown[]): Markup;
-export function markup(value: string): Markup;
-export function markup(
-  valueOrStrings: string | TemplateStringsArray,
-  ...placeholders: unknown[]
-): Markup {
-  if (!Array.isArray(valueOrStrings)) {
-    return new Markup(valueOrStrings);
-  }
-  const strings = valueOrStrings;
-  let acc = "";
-  let i = 0;
-  for (; i < placeholders.length; ++i) {
-    acc += strings[i] + htmlEscape(placeholders[i]);
-  }
-  acc += strings[i];
-  return new Markup(acc);
+export function markup(value: any) {
+  return new Markup(value);
 }

src/runtime/validation.ts

@@ -1,7 +1,15 @@
-import { OwlError } from "../common/owl_error";
+import { OwlError } from "./error_handling";
 import { toRaw } from "./reactivity";
 
-type BaseType = { new (...args: any[]): any } | true | "*";
+type BaseType =
+  | typeof String
+  | typeof Boolean
+  | typeof Number
+  | typeof Date
+  | typeof Object
+  | typeof Array
+  | true
+  | "*";
 
 interface TypeInfo {
   type?: TypeDescription;

src/version.ts

@@ -1,2 +1,2 @@
 // do not modify manually. This file is generated by the release script.
-export const version = "2.8.1";
+export const version = "2.1.3";

tests/__snapshots__/reactivity.test.ts.snap

@@ -1,5 +1,51 @@
 // 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(app, bdom, helpers
 ) {
@@ -109,6 +155,69 @@ exports[`Reactivity: useState parent and children subscribed to same context 2`]
 }"
 `;
 
+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(app, bdom, helpers
 ) {
@@ -244,7 +353,7 @@ exports[`Reactivity: useState useless atoms should be deleted 1`] = `
     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\`] = k_block2[i1];
+      ctx[\`id\`] = v_block2[i1];
       const key1 = ctx['id'];
       c_block2[i1] = withKey(comp1({id: ctx['id']}, key + \`__1__\${key1}\`, node, this, null), key1);
     }

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

@@ -15,76 +15,6 @@ exports[`app App supports env with getters/setters 1`] = `
 }"
 `;
 
-exports[`app app: clear scheduler tasks and destroy cancelled nodes immediately on destroy 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  const comp1 = app.createComponent(\`B\`, true, false, false, []);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2, b3;
-    b2 = text(\`A\`);
-    if (ctx['state'].value) {
-      b3 = comp1({}, key + \`__1\`, node, this, null);
-    }
-    return multi([b2, b3]);
-  }
-}"
-`;
-
-exports[`app app: clear scheduler tasks and destroy cancelled nodes immediately on destroy 3`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return text(\`B\`);
-  }
-}"
-`;
-
-exports[`app can add functions to the bdom 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { __globals__ } = helpers;
-  
-  let block1 = createBlock(\`<div class=\\"my-div\\" block-handler-0=\\"click\\"/>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [()=>__globals__.plop('click'), ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`app can call processTask twice in a row without crashing 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  const comp1 = app.createComponent(\`Child\`, true, false, false, []);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const b2 = text(\`parent\`);
-    const b3 = comp1({}, key + \`__1\`, node, this, null);
-    return multi([b2, b3]);
-  }
-}"
-`;
-
-exports[`app can call processTask twice in a row without crashing 2`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div/>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
 exports[`app can configure an app with props 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
@@ -99,19 +29,6 @@ exports[`app can configure an app with props 1`] = `
 }"
 `;
 
-exports[`app can load templates from an object name-string 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div class=\\"hello\\">hello</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
 exports[`app can mount app in an iframe 1`] = `
 "function anonymous(app, bdom, helpers
 ) {

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

@@ -1,210 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`destroy a subroot while another component is mounted in main app 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  const comp1 = app.createComponent(\`ChildB\`, true, false, false, []);
-  const comp2 = app.createComponent(\`ChildA\`, true, false, false, []);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2, b3;
-    if (ctx['state'].flag) {
-      b2 = comp1({}, key + \`__1\`, node, this, null);
-    } else {
-      b3 = comp2({}, key + \`__2\`, node, this, null);
-    }
-    return multi([b2, b3]);
-  }
-}"
-`;
-
-exports[`destroy a subroot while another component is mounted in main app 2`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block3 = createBlock(\`<div block-ref=\\"0\\"/>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const b2 = text(\`a\`);
-    let ref1 = (el) => this.__owl__.setRef((\`elem\`), el);
-    const b3 = block3([ref1]);
-    return multi([b2, b3]);
-  }
-}"
-`;
-
-exports[`destroy a subroot while another component is mounted in main app 3`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return text(\`c\`);
-  }
-}"
-`;
-
-exports[`destroy a subroot while another component is mounted in main app 4`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return text(\`b\`);
-  }
-}"
-`;
-
-exports[`subroot by default, env is the same in sub root 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>main app</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`subroot by default, env is the same in sub root 2`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>sub root</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`subroot can create a root in a setup function, then use a hook 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return text(\`a\`);
-  }
-}"
-`;
-
-exports[`subroot can create a root in a setup function, then use a hook 2`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return text(\`c\`);
-  }
-}"
-`;
-
-exports[`subroot can mount subroot 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>main app</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`subroot can mount subroot 2`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>sub root</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`subroot can mount subroot inside own dom 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>main app</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`subroot can mount subroot inside own dom 2`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>sub root</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`subroot env can be specified for sub roots 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>main app</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`subroot env can be specified for sub roots 2`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>sub root</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`subroot subcomponents can be destroyed, and it properly cleanup the subroots 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>main app</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`subroot subcomponents can be destroyed, and it properly cleanup the subroots 2`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>sub root</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;

tests/app/app.test.ts

@@ -1,15 +1,6 @@
-import { App, Component, mount, onWillPatch, onWillStart, useState, xml } from "../../src";
+import { App, Component, mount, xml } from "../../src";
 import { status } from "../../src/runtime/status";
-import {
-  makeTestFixture,
-  snapshotEverything,
-  nextTick,
-  elem,
-  useLogLifecycle,
-  makeDeferred,
-  nextMicroTick,
-  steps,
-} from "../helpers";
+import { makeTestFixture, snapshotEverything, nextTick, elem } from "../helpers";
 
 let fixture: HTMLElement;
 
@@ -103,120 +94,4 @@ describe("app", () => {
     expect(iframeDoc.contains(div)).toBe(false);
     expect(status(comp)).toBe("destroyed");
   });
-
-  test("app: clear scheduler tasks and destroy cancelled nodes immediately on destroy", async () => {
-    let def = makeDeferred();
-    class B extends Component {
-      static template = xml`B`;
-      setup() {
-        useLogLifecycle();
-        onWillStart(() => def);
-      }
-    }
-    class A extends Component {
-      static template = xml`A<t t-if="state.value"><B/></t>`;
-      static components = { B };
-      state = useState({ value: false });
-      setup() {
-        useLogLifecycle();
-      }
-    }
-
-    const app = new App(A);
-    const comp = await app.mount(fixture);
-    expect(steps.splice(0)).toMatchInlineSnapshot(`
-      Array [
-        "A:setup",
-        "A:willStart",
-        "A:willRender",
-        "A:rendered",
-        "A:mounted",
-      ]
-    `);
-
-    comp.state.value = true;
-    await nextTick();
-    expect(steps.splice(0)).toMatchInlineSnapshot(`
-      Array [
-        "A:willRender",
-        "B:setup",
-        "B:willStart",
-        "A:rendered",
-      ]
-    `);
-
-    // rerender to force the instantiation of a new B component (and cancelling the first)
-    comp.render();
-    await nextMicroTick();
-    expect(steps.splice(0)).toMatchInlineSnapshot(`
-      Array [
-        "A:willRender",
-        "B:setup",
-        "B:willStart",
-        "A:rendered",
-      ]
-    `);
-
-    app.destroy();
-    expect(steps.splice(0)).toMatchInlineSnapshot(`
-      Array [
-        "A:willUnmount",
-        "B:willDestroy",
-        "A:willDestroy",
-        "B:willDestroy",
-      ]
-    `);
-  });
-
-  test("can load templates from an object name-string", async () => {
-    const templates = {
-      hello: `<div class="hello">hello</div>`,
-      world: `<div>world</div>`,
-    };
-    class SomeComponent extends Component {
-      static template = "hello";
-    }
-
-    const app = new App(SomeComponent, { templates });
-    await app.mount(fixture);
-    expect(fixture.querySelector(".hello")).toBeDefined();
-    // Only the "hello" template is used, so the "world" template is not yet loaded
-    expect(Object.keys(app.templates)).toEqual(["hello"]);
-    expect(Object.keys(app.rawTemplates)).toEqual(["hello", "world"]);
-  });
-
-  test("can call processTask twice in a row without crashing", async () => {
-    class Child extends Component {
-      static template = xml`<div/>`;
-      setup() {
-        onWillPatch(() => app.scheduler.processTasks());
-      }
-    }
-    class SomeComponent extends Component {
-      static template = xml`parent<Child/>`;
-      static components = { Child };
-    }
-
-    const app = new App(SomeComponent);
-    await app.mount(fixture);
-    expect(fixture.innerHTML).toBe("parent<div></div>");
-  });
-
-  test("can add functions to the bdom", async () => {
-    const steps: string[] = [];
-    class SomeComponent extends Component {
-      static template = xml`<div t-on-click="() => __globals__.plop('click')" class="my-div"/>`;
-    }
-    const app = new App(SomeComponent, {
-      globalValues: {
-        plop: (string: any) => {
-          steps.push(string);
-        },
-      },
-    });
-    await app.mount(fixture);
-    expect(fixture.innerHTML).toBe(`<div class="my-div"></div>`);
-    fixture.querySelector("div")!.click();
-    expect(steps).toEqual(["click"]);
-  });
 });

tests/app/sub_root.test.ts

@@ -1,176 +0,0 @@
-import { App, Component, onMounted, onWillDestroy, useRef, useState, xml } from "../../src";
-import { status } from "../../src/runtime/status";
-import { makeTestFixture, nextTick, snapshotEverything } from "../helpers";
-
-let fixture: HTMLElement;
-
-snapshotEverything();
-
-beforeEach(() => {
-  fixture = makeTestFixture();
-});
-
-class SomeComponent extends Component {
-  static template = xml`<div>main app</div>`;
-}
-
-class SubComponent extends Component {
-  static template = xml`<div>sub root</div>`;
-}
-
-describe("subroot", () => {
-  test("can mount subroot", async () => {
-    const app = new App(SomeComponent);
-    const comp = await app.mount(fixture);
-    expect(fixture.innerHTML).toBe("<div>main app</div>");
-    const subRoot = app.createRoot(SubComponent);
-    const subcomp = await subRoot.mount(fixture);
-    expect(fixture.innerHTML).toBe("<div>main app</div><div>sub root</div>");
-
-    app.destroy();
-    expect(fixture.innerHTML).toBe("");
-    expect(status(comp)).toBe("destroyed");
-    expect(status(subcomp)).toBe("destroyed");
-  });
-
-  test("can mount subroot inside own dom", async () => {
-    const app = new App(SomeComponent);
-    const comp = await app.mount(fixture);
-    expect(fixture.innerHTML).toBe("<div>main app</div>");
-    const subRoot = app.createRoot(SubComponent);
-    const subcomp = await subRoot.mount(fixture.querySelector("div")!);
-    expect(fixture.innerHTML).toBe("<div>main app<div>sub root</div></div>");
-
-    app.destroy();
-    expect(fixture.innerHTML).toBe("");
-    expect(status(comp)).toBe("destroyed");
-    expect(status(subcomp)).toBe("destroyed");
-  });
-
-  test("by default, env is the same in sub root", async () => {
-    let env, subenv;
-    class SC extends SomeComponent {
-      setup() {
-        env = this.env;
-      }
-    }
-    class Sub extends SubComponent {
-      setup() {
-        subenv = this.env;
-      }
-    }
-
-    const app = new App(SC);
-    await app.mount(fixture);
-    const subRoot = app.createRoot(Sub);
-    await subRoot.mount(fixture);
-
-    expect(env).toBeDefined();
-    expect(subenv).toBeDefined();
-    expect(env).toBe(subenv);
-  });
-
-  test("env can be specified for sub roots", async () => {
-    const env1 = { env1: true };
-    const env2 = {};
-    let someComponentEnv: any, subComponentEnv: any;
-    class SC extends SomeComponent {
-      setup() {
-        someComponentEnv = this.env;
-      }
-    }
-    class Sub extends SubComponent {
-      setup() {
-        subComponentEnv = this.env;
-      }
-    }
-
-    const app = new App(SC, { env: env1 });
-    await app.mount(fixture);
-    const subRoot = app.createRoot(Sub, { env: env2 });
-    await subRoot.mount(fixture);
-
-    // because env is different in app => it is given a sub object, frozen and all
-    // not sure it is a good idea, but it's the way owl 2 works. maybe we should
-    // avoid doing anything with the main env and let user code do it if they
-    // want. in that case, we can change the test here to assert that they are equal
-    expect(someComponentEnv).not.toBe(env1);
-    expect(someComponentEnv!.env1).toBe(true);
-    expect(subComponentEnv).toBe(env2);
-  });
-
-  test("subcomponents can be destroyed, and it properly cleanup the subroots", async () => {
-    const app = new App(SomeComponent);
-    const comp = await app.mount(fixture);
-    expect(fixture.innerHTML).toBe("<div>main app</div>");
-    const root = app.createRoot(SubComponent);
-    const subcomp = await root.mount(fixture.querySelector("div")!);
-    expect(fixture.innerHTML).toBe("<div>main app<div>sub root</div></div>");
-
-    root.destroy();
-    expect(fixture.innerHTML).toBe("<div>main app</div>");
-    expect(status(comp)).not.toBe("destroyed");
-    expect(status(subcomp)).toBe("destroyed");
-  });
-
-  test("can create a root in a setup function, then use a hook", async () => {
-    class C extends Component {
-      static template = xml`c`;
-    }
-
-    class A extends Component {
-      static template = xml`a`;
-      state: any;
-      setup() {
-        app.createRoot(C);
-        this.state = useState({ value: 1 });
-      }
-    }
-
-    const app = new App(A);
-    await app.mount(fixture);
-    expect(fixture.innerHTML).toBe("a");
-  });
-});
-
-test("destroy a subroot while another component is mounted in main app", async () => {
-  class C extends Component {
-    static template = xml`c`;
-  }
-
-  class ChildA extends Component {
-    static template = xml`a<div t-ref="elem"></div>`;
-    ref: any;
-    setup() {
-      this.ref = useRef("elem");
-      let root = app.createRoot(C);
-      onMounted(() => {
-        root.mount(this.ref.el);
-      });
-      onWillDestroy(() => {
-        root.destroy();
-      });
-    }
-  }
-  class ChildB extends Component {
-    static template = xml`b`;
-  }
-
-  class SomeComponent extends Component {
-    static template = xml`
-        <t t-if="state.flag"><ChildB/></t>
-        <t t-else=""><ChildA/></t>
-        `;
-    static components = { ChildA, ChildB };
-    state = useState({ flag: false });
-  }
-
-  const app = new App(SomeComponent);
-  const comp = await app.mount(fixture);
-  expect(fixture.innerHTML).toBe("a<div></div>");
-  await nextTick();
-  expect(fixture.innerHTML).toBe("a<div>c</div>");
-  comp.state.flag = true;
-  await nextTick();
-  expect(fixture.innerHTML).toBe("b");
-});

tests/blockdom/block.test.ts

@@ -244,14 +244,12 @@ describe("misc", () => {
   });
 
   test("namespace is not propagated to siblings", () => {
-    const block = createBlock(`<div><svg xmlns="someNameSpace"><g/></svg><div></div></div>`);
+    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 xmlns="someNameSpace"><g></g></svg><div></div></div>'
-    );
+    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");

tests/blockdom/block_attributes.test.ts

@@ -145,34 +145,3 @@ test("class attribute (with a preexisting value", async () => {
   patch(tree, block([""]));
   expect(fixture.innerHTML).toBe(`<div class="tomato"></div>`);
 });
-
-test("block-class attributes with preexisting class attribute", async () => {
-  const block = createBlock('<div block-attributes="0" class="owl"></div>');
-  const tree = block([{ class: "eagle" }]);
-
-  mount(tree, fixture);
-  expect(fixture.innerHTML).toBe(`<div class="owl eagle"></div>`);
-
-  patch(tree, block([{ class: "falcon" }]));
-  expect(fixture.innerHTML).toBe(`<div class="owl falcon"></div>`);
-
-  patch(tree, block([{}]));
-  expect(fixture.innerHTML).toBe(`<div class="owl"></div>`);
-});
-
-test("block-class attributes (array syntax) with preexisting class attribute", async () => {
-  const block = createBlock('<div block-attributes="0" class="owl"></div>');
-  const tree = block([["class", "eagle"]]);
-
-  mount(tree, fixture);
-  expect(fixture.innerHTML).toBe(`<div class="owl eagle"></div>`);
-
-  patch(tree, block([["class", "falcon"]]));
-  expect(fixture.innerHTML).toBe(`<div class="owl falcon"></div>`);
-
-  patch(tree, block([["class", ""]]));
-  expect(fixture.innerHTML).toBe(`<div class="owl"></div>`);
-
-  patch(tree, block([["class", "buzzard"]]));
-  expect(fixture.innerHTML).toBe(`<div class="owl buzzard"></div>`);
-});

tests/blockdom/namespace.test.ts

@@ -30,22 +30,22 @@ describe("namespace", () => {
     expect(fixture.firstElementChild!.namespaceURI).toBe(XHTML_URI);
   });
 
-  test("namespace can be changed with xmlns", () => {
-    const block = createBlock(`<tag xmlns="${SVG_URI}"/>`);
+  test("namespace can be changed with block-ns", () => {
+    const block = createBlock(`<tag block-ns="${SVG_URI}"/>`);
     const tree = block();
     mount(tree, fixture);
-    expect(fixture.innerHTML).toBe(`<tag xmlns="${SVG_URI}"></tag>`);
+    expect(fixture.innerHTML).toBe("<tag></tag>");
     expect(fixture.firstElementChild!.namespaceURI).toBe(SVG_URI);
   });
 
   test("namespace is kept for children", () => {
     const block = createBlock(
-      `<parent xmlns="${SVG_URI}"><child><subchild/></child><child/></parent>`
+      `<parent block-ns="${SVG_URI}"><child><subchild/></child><child/></parent>`
     );
     const tree = block();
     mount(tree, fixture);
     expect(fixture.innerHTML).toBe(
-      `<parent xmlns="${SVG_URI}"><child><subchild></subchild></child><child></child></parent>`
+      "<parent><child><subchild></subchild></child><child></child></parent>"
     );
     const parent = fixture.firstElementChild!;
     const child1 = parent.firstElementChild!;
@@ -58,10 +58,10 @@ describe("namespace", () => {
   });
 
   test("various namespaces in same block", () => {
-    const block = createBlock(`<none><one xmlns="one"/><two xmlns="two"/></none>`);
+    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 xmlns="one"></one><two xmlns="two"></two></none>');
+    expect(fixture.innerHTML).toBe("<none><one></one><two></two></none>");
     const none = fixture.firstElementChild!;
     const one = none.firstElementChild!;
     const two = one.nextElementSibling!;

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

@@ -707,123 +707,6 @@ exports[`attributes updating classes (with obj notation) 1`] = `
 }"
 `;
 
-exports[`attributes various combinations of class, t-att-class, and t-att 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div block-attributes=\\"0\\" class=\\"c\\">content</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let attr1 = {class:'a'};
-    return block1([attr1]);
-  }
-}"
-`;
-
-exports[`attributes various combinations of class, t-att-class, and t-att 2`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div block-attributes=\\"0\\" block-attribute-1=\\"class\\" class=\\"c\\">content</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let attr1 = {class:'a'};
-    let attr2 = {'b':true};
-    return block1([attr1, attr2]);
-  }
-}"
-`;
-
-exports[`attributes various combinations of class, t-att-class, and t-att 3`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div block-attributes=\\"0\\" class=\\"c\\" block-attribute-1=\\"class\\">content</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let attr1 = {class:'a'};
-    let attr2 = {'b':true};
-    return block1([attr1, attr2]);
-  }
-}"
-`;
-
-exports[`attributes various combinations of class, t-att-class, and t-att 4`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div class=\\"c\\" block-attributes=\\"0\\" block-attribute-1=\\"class\\">content</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let attr1 = {class:'a'};
-    let attr2 = {'b':true};
-    return block1([attr1, attr2]);
-  }
-}"
-`;
-
-exports[`attributes various combinations of class, t-att-class, and t-att 5`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div class=\\"c\\" block-attribute-0=\\"class\\" block-attributes=\\"1\\">content</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let attr1 = {'b':true};
-    let attr2 = {class:'a'};
-    return block1([attr1, attr2]);
-  }
-}"
-`;
-
-exports[`attributes various combinations of class, t-att-class, and t-att 6`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div class=\\"c\\" block-attribute-0=\\"class\\">content</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let attr1 = {'b':true};
-    return block1([attr1]);
-  }
-}"
-`;
-
-exports[`attributes various combinations of class, t-att-class, and t-att 7`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div class=\\"c\\" block-attribute-0=\\"class\\">content</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let attr1 = ('b');
-    return block1([attr1]);
-  }
-}"
-`;
-
-exports[`attributes various combinations of class, t-att-class, and t-att 8`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div block-attributes=\\"0\\" block-attribute-1=\\"class\\">content</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let attr1 = {class:'a'};
-    let attr2 = {'b':true};
-    return block1([attr1, attr2]);
-  }
-}"
-`;
-
 exports[`attributes various escapes 1`] = `
 "function anonymous(app, bdom, helpers
 ) {

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

@@ -1,38 +1,5 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`comments comment node with backslash at top level 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return comment(\` \\\\\\\\ \`);
-  }
-}"
-`;
-
-exports[`comments comment node with backtick at top-level 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return comment(\` \\\\\` \`);
-  }
-}"
-`;
-
-exports[`comments comment node with interpolation sigil at top level 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return comment(\` \\\\\${very cool} \`);
-  }
-}"
-`;
-
 exports[`comments only a comment 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
@@ -67,7 +34,7 @@ exports[`comments properly handle comments between t-if/t-else 1`] = `
   let block3 = createBlock(\`<span>owl</span>\`);
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3;
+    let b2,b3;
     if (true) {
       b2 = block2();
     } else {

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

@@ -72,7 +72,7 @@ exports[`t-on can bind handlers with empty object (with non empty inner string)
     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\`] = k_block2[i1];
+      ctx[\`action\`] = v_block2[i1];
       ctx[\`action_index\`] = i1;
       const key1 = ctx['action_index'];
       const v1 = ctx['activate'];
@@ -142,7 +142,7 @@ exports[`t-on handler is bound to proper owner, part 2 1`] = `
     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\`] = k_block1[i1];
+      ctx[\`value\`] = v_block1[i1];
       const key1 = ctx['value'];
       let hdlr1 = [ctx['add'], ctx];
       c_block1[i1] = withKey(block2([hdlr1]), key1);
@@ -189,11 +189,11 @@ exports[`t-on handler is bound to proper owner, part 4 1`] = `
     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\`] = k_block1[i1];
+      ctx[\`value\`] = v_block1[i1];
       ctx[\`value_first\`] = i1 === 0;
-      ctx[\`value_last\`] = i1 === k_block1.length - 1;
+      ctx[\`value_last\`] = i1 === v_block1.length - 1;
       ctx[\`value_index\`] = i1;
-      ctx[\`value_value\`] = v_block1[i1];
+      ctx[\`value_value\`] = k_block1[i1];
       const key1 = ctx['value'];
       c_block1[i1] = withKey(callTemplate_1.call(this, ctx, node, key + \`__1__\${key1}\`), key1);
     }
@@ -348,7 +348,7 @@ exports[`t-on t-on modifiers (native listener) t-on with prevent modifier in t-f
     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\`] = k_block2[i1];
+      ctx[\`project\`] = v_block2[i1];
       const key1 = ctx['project'];
       const v1 = ctx['onEdit'];
       const v2 = ctx['project'];

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

@@ -18,7 +18,7 @@ exports[`misc complex template 1`] = `
   let block13 = createBlock(\`<i class=\\"fa fa-fw fa-clock-o\\" title=\\"This commit is the head of a base branch\\"/>\`);
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3, b4, b6, b8;
+    let b2,b3,b4,b6,b8;
     let attr1 = \`batch_tile \${ctx['options'].more?'more':'nomore'}\`;
     let attr2 = \`card bg-\${ctx['klass']}-light\`;
     let attr3 = \`/runbot/batch/\${ctx['batch'].id}\`;
@@ -33,7 +33,7 @@ exports[`misc complex template 1`] = `
     ctx = Object.create(ctx);
     const [k_block4, v_block4, l_block4, c_block4] = prepareList(ctx['batch'].slot_ids.filter(_slot=>_slot.build_id.id&&!_slot.trigger_id.manual&&(ctx['options'].trigger_display[_slot.trigger_id.id])));;
     for (let i1 = 0; i1 < l_block4; i1++) {
-      ctx[\`slot\`] = k_block4[i1];
+      ctx[\`slot\`] = v_block4[i1];
       const key1 = ctx['slot'].id;
       c_block4[i1] = withKey(comp1({class: ctx['slot_container'],slot: ctx['slot']}, key + \`__1__\${key1}\`, node, this, null), key1);
     }
@@ -42,7 +42,7 @@ exports[`misc complex template 1`] = `
     ctx = Object.create(ctx);
     const [k_block6, v_block6, l_block6, c_block6] = prepareList([1,2,3,4]);;
     for (let i1 = 0; i1 < l_block6; i1++) {
-      ctx[\`x\`] = k_block6[i1];
+      ctx[\`x\`] = v_block6[i1];
       const key1 = ctx['x'];
       c_block6[i1] = withKey(block7(), key1);
     }
@@ -51,9 +51,9 @@ exports[`misc complex template 1`] = `
     ctx = Object.create(ctx);
     const [k_block8, v_block8, l_block8, c_block8] = prepareList(ctx['commit_links']);;
     for (let i1 = 0; i1 < l_block8; i1++) {
-      ctx[\`commit_link\`] = k_block8[i1];
+      ctx[\`commit_link\`] = v_block8[i1];
       const key1 = ctx['commit_link'].id;
-      let b10, b11, b12, b13;
+      let b10,b11,b12,b13;
       let attr5 = \`/runbot/commit/\${ctx['commit_link'].commit_id}\`;
       let attr6 = \`badge badge-light batch_commit match_type_\${ctx['commit_link'].match_type}\`;
       if (ctx['commit_link'].match_type=='new') {
@@ -99,11 +99,11 @@ exports[`misc global 1`] = `
     ctx = Object.create(ctx);
     const [k_block2, v_block2, l_block2, c_block2] = prepareList([4,5,6]);;
     for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`value\`] = k_block2[i1];
+      ctx[\`value\`] = v_block2[i1];
       ctx[\`value_first\`] = i1 === 0;
-      ctx[\`value_last\`] = i1 === k_block2.length - 1;
+      ctx[\`value_last\`] = i1 === v_block2.length - 1;
       ctx[\`value_index\`] = i1;
-      ctx[\`value_value\`] = v_block2[i1];
+      ctx[\`value_value\`] = k_block2[i1];
       const key1 = ctx['value'];
       let txt1 = ctx['value'];
       const b4 = block4([txt1]);
@@ -112,16 +112,16 @@ exports[`misc global 1`] = `
       ctx = Object.create(ctx);
       ctx[isBoundary] = 1;
       setContextValue(ctx, \\"foo\\", 'aaa');
-      const b7 = callTemplate_1.call(this, ctx, node, key + \`__1__\${key1}\`);
+      const b6 = callTemplate_1.call(this, ctx, node, key + \`__1__\${key1}\`);
       ctx = ctx.__proto__;
-      const b8 = callTemplate_2.call(this, ctx, node, key + \`__2__\${key1}\`);
+      const b7 = callTemplate_2.call(this, ctx, node, key + \`__2__\${key1}\`);
       setContextValue(ctx, \\"foo\\", 'bbb');
-      const b9 = callTemplate_3.call(this, ctx, node, key + \`__3__\${key1}\`);
-      const b6 = multi([b7, b8, b9]);
-      ctx[zero] = b6;
-      const b5 = callTemplate_4.call(this, ctx, node, key + \`__4__\${key1}\`);
+      const b8 = callTemplate_3.call(this, ctx, node, key + \`__3__\${key1}\`);
+      const b5 = multi([b6, b7, b8]);
+      ctx[zero] = b5;
+      const b9 = callTemplate_4.call(this, ctx, node, key + \`__4__\${key1}\`);
       ctx = ctx.__proto__;
-      c_block2[i1] = withKey(multi([b4, b5]), key1);
+      c_block2[i1] = withKey(multi([b4, b9]), key1);
     }
     ctx = ctx.__proto__;
     const b2 = list(c_block2);
@@ -217,13 +217,13 @@ exports[`misc other complex template 1`] = `
   let block25 = createBlock(\`<div><block-child-0/><block-child-1/></div>\`);
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b4, b14, b17, b22, b23, b24, b25;
+    let b2,b4,b14,b17,b22,b23,b24,b25;
     let attr1 = \`/runbot/\${ctx['project'].slug}\`;
     let txt1 = ctx['project'].name;
     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\`] = k_block2[i1];
+      ctx[\`project\`] = v_block2[i1];
       const key1 = ctx['project'].id;
       let hdlr1 = [ctx['selectProject'](ctx['project']), ctx];
       let txt2 = ctx['project'].name;
@@ -232,12 +232,12 @@ exports[`misc other complex template 1`] = `
     ctx = ctx.__proto__;
     b2 = list(c_block2);
     if (ctx['user']) {
-      let b5, b6;
+      let b5,b6;
       if (ctx['user'].public) {
         let attr2 = \`/web/login?redirect=/\`;
         b5 = block5([attr2]);
       } else {
-        let b7, b10, b13;
+        let b7,b10,b13;
         if (ctx['nb_assigned_errors']&&ctx['nb_assigned_errors']>0) {
           let attr3 = \`You have \${ctx['nb_assigned_errors']} random bug assigned\`;
           let txt3 = ctx['nb_assigned_errors'];
@@ -263,7 +263,7 @@ exports[`misc other complex template 1`] = `
       ctx = Object.create(ctx);
       const [k_block15, v_block15, l_block15, c_block15] = prepareList(ctx['categories']);;
       for (let i1 = 0; i1 < l_block15; i1++) {
-        ctx[\`category\`] = k_block15[i1];
+        ctx[\`category\`] = v_block15[i1];
         const key1 = ctx['category'].id;
         let attr6 = ctx['category'].id;
         let prop1 = new Boolean(ctx['category'].id==ctx['options'].active_category_id);
@@ -284,7 +284,7 @@ exports[`misc other complex template 1`] = `
       ctx = Object.create(ctx);
       const [k_block18, v_block18, l_block18, c_block18] = prepareList(ctx['triggers']);;
       for (let i1 = 0; i1 < l_block18; i1++) {
-        ctx[\`trigger\`] = k_block18[i1];
+        ctx[\`trigger\`] = v_block18[i1];
         const key1 = ctx['trigger'].id;
         let b20;
         if (!ctx['trigger'].manual&&ctx['trigger'].project_id===ctx['project'].id&&ctx['trigger'].category_id===ctx['options'].active_category_id) {

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

@@ -12,7 +12,7 @@ exports[`memory t-foreach does not leak stuff in global scope 1`] = `
     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\`] = k_block2[i1];
+      ctx[\`item\`] = v_block2[i1];
       ctx[\`item_index\`] = i1;
       const key1 = ctx['item_index'];
       c_block2[i1] = withKey(text(ctx['item']), key1);

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

@@ -341,39 +341,6 @@ exports[`simple templates, mostly static template with t tag with multiple conte
 }"
 `;
 
-exports[`simple templates, mostly static text node with backslash at top level 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return text(\`\\\\\\\\\`);
-  }
-}"
-`;
-
-exports[`simple templates, mostly static text node with backtick at top-level 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return text(\`\\\\\`\`);
-  }
-}"
-`;
-
-exports[`simple templates, mostly static text node with interpolation sigil at top level 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return text(\`\\\\\${very cool}\`);
-  }
-}"
-`;
-
 exports[`simple templates, mostly static two t-escs next to each other 1`] = `
 "function anonymous(app, bdom, helpers
 ) {

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

@@ -5,7 +5,7 @@ exports[`properly support svg add proper namespace to g tags 1`] = `
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
   
-  let block1 = createBlock(\`<g xmlns=\\"http://www.w3.org/2000/svg\\"><circle cx=\\"50\\" cy=\\"50\\" r=\\"4\\" stroke=\\"green\\" stroke-width=\\"1\\" fill=\\"yellow\\"/> </g>\`);
+  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();
@@ -18,7 +18,7 @@ exports[`properly support svg add proper namespace to svg 1`] = `
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
   
-  let block1 = createBlock(\`<svg xmlns=\\"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>\`);
+  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();
@@ -31,7 +31,7 @@ exports[`properly support svg namespace to g tags not added if already in svg na
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
   
-  let block1 = createBlock(\`<svg xmlns=\\"http://www.w3.org/2000/svg\\"><g/></svg>\`);
+  let block1 = createBlock(\`<svg block-ns=\\"http://www.w3.org/2000/svg\\"><g/></svg>\`);
   
   return function template(ctx, node, key = \\"\\") {
     return block1();
@@ -44,7 +44,7 @@ exports[`properly support svg namespace to svg tags added even if already in svg
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
   
-  let block1 = createBlock(\`<svg xmlns=\\"http://www.w3.org/2000/svg\\"><svg/></svg>\`);
+  let block1 = createBlock(\`<svg block-ns=\\"http://www.w3.org/2000/svg\\"><svg/></svg>\`);
   
   return function template(ctx, node, key = \\"\\") {
     return block1();
@@ -58,8 +58,8 @@ exports[`properly support svg svg creates new block if it is within html -- 2 1`
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
   
   let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block2 = createBlock(\`<svg xmlns=\\"http://www.w3.org/2000/svg\\"><polygon fill=\\"#000000\\" points=\\"0 0 4 4 8 0\\" transform=\\"translate(5 7)\\"/><block-child-0 xmlns=\\"\\"/></svg>\`);
-  let block3 = createBlock(\`<path xmlns=\\"http://www.w3.org/2000/svg\\"/>\`);
+  let block2 = createBlock(\`<svg block-ns=\\"http://www.w3.org/2000/svg\\"><polygon fill=\\"#000000\\" points=\\"0 0 4 4 8 0\\" transform=\\"translate(5 7)\\"/><block-child-0/></svg>\`);
+  let block3 = createBlock(\`<path block-ns=\\"http://www.w3.org/2000/svg\\"/>\`);
   
   return function template(ctx, node, key = \\"\\") {
     let b3;
@@ -78,7 +78,7 @@ exports[`properly support svg svg creates new block if it is within html 1`] = `
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
   
   let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block2 = createBlock(\`<svg xmlns=\\"http://www.w3.org/2000/svg\\"><polygon fill=\\"#000000\\" points=\\"0 0 4 4 8 0\\" transform=\\"translate(5 7)\\"/></svg>\`);
+  let block2 = createBlock(\`<svg block-ns=\\"http://www.w3.org/2000/svg\\"><polygon fill=\\"#000000\\" points=\\"0 0 4 4 8 0\\" transform=\\"translate(5 7)\\"/></svg>\`);
   
   return function template(ctx, node, key = \\"\\") {
     const b2 = block2();
@@ -93,7 +93,7 @@ exports[`properly support svg svg namespace added to sub templates if root tag i
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
   const callTemplate_1 = app.getTemplate(\`path\`);
   
-  let block1 = createBlock(\`<svg xmlns=\\"http://www.w3.org/2000/svg\\"><block-child-0 xmlns=\\"\\"/></svg>\`);
+  let block1 = createBlock(\`<svg block-ns=\\"http://www.w3.org/2000/svg\\"><block-child-0/></svg>\`);
   
   return function template(ctx, node, key = \\"\\") {
     const b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
@@ -107,7 +107,7 @@ exports[`properly support svg svg namespace added to sub templates if root tag i
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
   
-  let block1 = createBlock(\`<path xmlns=\\"http://www.w3.org/2000/svg\\"/>\`);
+  let block1 = createBlock(\`<path block-ns=\\"http://www.w3.org/2000/svg\\"/>\`);
   
   return function template(ctx, node, key = \\"\\") {
     return block1();
@@ -120,8 +120,8 @@ exports[`properly support svg svg namespace added to sub-blocks 1`] = `
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
   
-  let block1 = createBlock(\`<svg xmlns=\\"http://www.w3.org/2000/svg\\"><block-child-0 xmlns=\\"\\"/></svg>\`);
-  let block2 = createBlock(\`<path xmlns=\\"http://www.w3.org/2000/svg\\"/>\`);
+  let block1 = createBlock(\`<svg block-ns=\\"http://www.w3.org/2000/svg\\"><block-child-0/></svg>\`);
+  let block2 = createBlock(\`<path block-ns=\\"http://www.w3.org/2000/svg\\"/>\`);
   
   return function template(ctx, node, key = \\"\\") {
     let b2;

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

@@ -61,19 +61,19 @@ exports[`t-call (template calling) call with several sub nodes on same line 1`]
   const callTemplate_1 = app.getTemplate(\`sub\`);
   
   let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block4 = createBlock(\`<span>hey</span>\`);
-  let block6 = createBlock(\`<span>yay</span>\`);
+  let block3 = createBlock(\`<span>hey</span>\`);
+  let block5 = createBlock(\`<span>yay</span>\`);
   
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1;
-    const b4 = block4();
-    const b5 = text(\` \`);
-    const b6 = block6();
-    const b3 = multi([b4, b5, b6]);
-    ctx[zero] = b3;
-    const b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
-    return block1([], [b2]);
+    const b3 = block3();
+    const b4 = text(\` \`);
+    const b5 = block5();
+    const b2 = multi([b3, b4, b5]);
+    ctx[zero] = b2;
+    const b6 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
+    return block1([], [b6]);
   }
 }"
 `;
@@ -101,19 +101,19 @@ exports[`t-call (template calling) cascading t-call t-out='0' 1`] = `
   const callTemplate_1 = app.getTemplate(\`subTemplate\`);
   
   let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block4 = createBlock(\`<span>hey</span>\`);
-  let block6 = createBlock(\`<span>yay</span>\`);
+  let block3 = createBlock(\`<span>hey</span>\`);
+  let block5 = createBlock(\`<span>yay</span>\`);
   
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1;
-    const b4 = block4();
-    const b5 = text(\` \`);
-    const b6 = block6();
-    const b3 = multi([b4, b5, b6]);
-    ctx[zero] = b3;
-    const b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
-    return block1([], [b2]);
+    const b3 = block3();
+    const b4 = text(\` \`);
+    const b5 = block5();
+    const b2 = multi([b3, b4, b5]);
+    ctx[zero] = b2;
+    const b6 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
+    return block1([], [b6]);
   }
 }"
 `;
@@ -126,17 +126,17 @@ exports[`t-call (template calling) cascading t-call t-out='0' 2`] = `
   const callTemplate_1 = app.getTemplate(\`subSubTemplate\`);
   
   let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block4 = createBlock(\`<span>cascade 0</span>\`);
+  let block3 = createBlock(\`<span>cascade 0</span>\`);
   
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1;
-    const b4 = block4();
-    const b5 = ctx[zero];
-    const b3 = multi([b4, b5]);
-    ctx[zero] = b3;
-    const b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
-    return block1([], [b2]);
+    const b3 = block3();
+    const b4 = ctx[zero];
+    const b2 = multi([b3, b4]);
+    ctx[zero] = b2;
+    const b5 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
+    return block1([], [b5]);
   }
 }"
 `;
@@ -149,17 +149,17 @@ exports[`t-call (template calling) cascading t-call t-out='0' 3`] = `
   const callTemplate_1 = app.getTemplate(\`finalTemplate\`);
   
   let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block4 = createBlock(\`<span>cascade 1</span>\`);
+  let block3 = createBlock(\`<span>cascade 1</span>\`);
   
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1;
-    const b4 = block4();
-    const b5 = ctx[zero];
-    const b3 = multi([b4, b5]);
-    ctx[zero] = b3;
-    const b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
-    return block1([], [b2]);
+    const b3 = block3();
+    const b4 = ctx[zero];
+    const b2 = multi([b3, b4]);
+    ctx[zero] = b2;
+    const b5 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
+    return block1([], [b5]);
   }
 }"
 `;
@@ -186,17 +186,17 @@ exports[`t-call (template calling) cascading t-call t-out='0', without external
   let { isBoundary, zero } = helpers;
   const callTemplate_1 = app.getTemplate(\`subTemplate\`);
   
-  let block3 = createBlock(\`<span>hey</span>\`);
-  let block5 = createBlock(\`<span>yay</span>\`);
+  let block2 = createBlock(\`<span>hey</span>\`);
+  let block4 = createBlock(\`<span>yay</span>\`);
   
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1;
-    const b3 = block3();
-    const b4 = text(\` \`);
-    const b5 = block5();
-    const b2 = multi([b3, b4, b5]);
-    ctx[zero] = b2;
+    const b2 = block2();
+    const b3 = text(\` \`);
+    const b4 = block4();
+    const b1 = multi([b2, b3, b4]);
+    ctx[zero] = b1;
     return callTemplate_1.call(this, ctx, node, key + \`__1\`);
   }
 }"
@@ -209,15 +209,15 @@ exports[`t-call (template calling) cascading t-call t-out='0', without external
   let { isBoundary, zero } = helpers;
   const callTemplate_1 = app.getTemplate(\`subSubTemplate\`);
   
-  let block3 = createBlock(\`<span>cascade 0</span>\`);
+  let block2 = createBlock(\`<span>cascade 0</span>\`);
   
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1;
-    const b3 = block3();
-    const b4 = ctx[zero];
-    const b2 = multi([b3, b4]);
-    ctx[zero] = b2;
+    const b2 = block2();
+    const b3 = ctx[zero];
+    const b1 = multi([b2, b3]);
+    ctx[zero] = b1;
     return callTemplate_1.call(this, ctx, node, key + \`__1\`);
   }
 }"
@@ -230,15 +230,15 @@ exports[`t-call (template calling) cascading t-call t-out='0', without external
   let { isBoundary, zero } = helpers;
   const callTemplate_1 = app.getTemplate(\`finalTemplate\`);
   
-  let block3 = createBlock(\`<span>cascade 1</span>\`);
+  let block2 = createBlock(\`<span>cascade 1</span>\`);
   
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1;
-    const b3 = block3();
-    const b4 = ctx[zero];
-    const b2 = multi([b3, b4]);
-    ctx[zero] = b2;
+    const b2 = block2();
+    const b3 = ctx[zero];
+    const b1 = multi([b2, b3]);
+    ctx[zero] = b1;
     return callTemplate_1.call(this, ctx, node, key + \`__1\`);
   }
 }"
@@ -342,15 +342,15 @@ exports[`t-call (template calling) nested t-calls with magic variable 0 1`] = `
   const callTemplate_1 = app.getTemplate(\`grandchild\`);
   const callTemplate_2 = app.getTemplate(\`child\`);
   
-  let block3 = createBlock(\`<p>Some content...</p>\`);
+  let block1 = createBlock(\`<p>Some content...</p>\`);
   
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1;
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1;
-    const b3 = block3();
-    ctx[zero] = b3;
+    const b1 = block1();
+    ctx[zero] = b1;
     const b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
     ctx = ctx.__proto__;
     ctx[zero] = b2;
@@ -440,11 +440,11 @@ exports[`t-call (template calling) recursive template, part 2 2`] = `
     ctx = Object.create(ctx);
     const [k_block2, v_block2, l_block2, c_block2] = prepareList(ctx['node'].children||[]);;
     for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`subtree\`] = k_block2[i1];
+      ctx[\`subtree\`] = v_block2[i1];
       ctx[\`subtree_first\`] = i1 === 0;
-      ctx[\`subtree_last\`] = i1 === k_block2.length - 1;
+      ctx[\`subtree_last\`] = i1 === v_block2.length - 1;
       ctx[\`subtree_index\`] = i1;
-      ctx[\`subtree_value\`] = v_block2[i1];
+      ctx[\`subtree_value\`] = k_block2[i1];
       const key1 = ctx['subtree_index'];
       ctx = Object.create(ctx);
       ctx[isBoundary] = 1;
@@ -495,11 +495,11 @@ exports[`t-call (template calling) recursive template, part 3 2`] = `
     ctx = Object.create(ctx);
     const [k_block2, v_block2, l_block2, c_block2] = prepareList(ctx['node'].children||[]);;
     for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`subtree\`] = k_block2[i1];
+      ctx[\`subtree\`] = v_block2[i1];
       ctx[\`subtree_first\`] = i1 === 0;
-      ctx[\`subtree_last\`] = i1 === k_block2.length - 1;
+      ctx[\`subtree_last\`] = i1 === v_block2.length - 1;
       ctx[\`subtree_index\`] = i1;
-      ctx[\`subtree_value\`] = v_block2[i1];
+      ctx[\`subtree_value\`] = k_block2[i1];
       const key1 = ctx['subtree_index'];
       ctx = Object.create(ctx);
       ctx[isBoundary] = 1;
@@ -553,11 +553,11 @@ exports[`t-call (template calling) recursive template, part 4: with t-set recurs
     ctx = Object.create(ctx);
     const [k_block2, v_block2, l_block2, c_block2] = prepareList(ctx['node'].children||[]);;
     for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`subtree\`] = k_block2[i1];
+      ctx[\`subtree\`] = v_block2[i1];
       ctx[\`subtree_first\`] = i1 === 0;
-      ctx[\`subtree_last\`] = i1 === k_block2.length - 1;
+      ctx[\`subtree_last\`] = i1 === v_block2.length - 1;
       ctx[\`subtree_index\`] = i1;
-      ctx[\`subtree_value\`] = v_block2[i1];
+      ctx[\`subtree_value\`] = k_block2[i1];
       const key1 = ctx['subtree_index'];
       ctx = Object.create(ctx);
       ctx[isBoundary] = 1;
@@ -571,134 +571,6 @@ exports[`t-call (template calling) recursive template, part 4: with t-set recurs
 }"
 `;
 
-exports[`t-call (template calling) root t-call with body: t-foreach 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { isBoundary, prepareList, withKey, zero } = helpers;
-  const callTemplate_1 = app.getTemplate(\`subTemplate\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1;
-    ctx = Object.create(ctx);
-    const [k_block2, v_block2, l_block2, c_block2] = prepareList([1]);;
-    for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`i\`] = k_block2[i1];
-      const key1 = ctx['i'];
-      c_block2[i1] = withKey(text(\`1\`), key1);
-    }
-    ctx = ctx.__proto__;
-    const b2 = list(c_block2);
-    ctx[zero] = b2;
-    return callTemplate_1.call(this, ctx, node, key + \`__1\`);
-  }
-}"
-`;
-
-exports[`t-call (template calling) root t-call with body: t-foreach 2`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return text(\`sub\`);
-  }
-}"
-`;
-
-exports[`t-call (template calling) root t-call with body: t-if false 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { isBoundary, zero } = helpers;
-  const callTemplate_1 = app.getTemplate(\`subTemplate\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1;
-    let b3;
-    if (false) {
-      b3 = text(\`zero\`);
-    }
-    const b2 = multi([b3]);
-    ctx[zero] = b2;
-    return callTemplate_1.call(this, ctx, node, key + \`__1\`);
-  }
-}"
-`;
-
-exports[`t-call (template calling) root t-call with body: t-if false 2`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return text(\`sub\`);
-  }
-}"
-`;
-
-exports[`t-call (template calling) root t-call with body: t-if true 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { isBoundary, zero } = helpers;
-  const callTemplate_1 = app.getTemplate(\`subTemplate\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1;
-    let b3;
-    if (true) {
-      b3 = text(\`zero\`);
-    }
-    const b2 = multi([b3]);
-    ctx[zero] = b2;
-    return callTemplate_1.call(this, ctx, node, key + \`__1\`);
-  }
-}"
-`;
-
-exports[`t-call (template calling) root t-call with body: t-if true 2`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return text(\`sub\`);
-  }
-}"
-`;
-
-exports[`t-call (template calling) root t-call with body: t-out with default 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { isBoundary, safeOutput, zero } = helpers;
-  const callTemplate_1 = app.getTemplate(\`subTemplate\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1;
-    const b2 = safeOutput(ctx['nothing']);
-    ctx[zero] = b2;
-    return callTemplate_1.call(this, ctx, node, key + \`__1\`);
-  }
-}"
-`;
-
-exports[`t-call (template calling) root t-call with body: t-out with default 2`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return text(\`sub\`);
-  }
-}"
-`;
-
 exports[`t-call (template calling) scoped parameters 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
@@ -833,13 +705,13 @@ exports[`t-call (template calling) t-call with body content as root of a templat
   let { isBoundary, zero } = helpers;
   const callTemplate_1 = app.getTemplate(\`antony\`);
   
-  let block2 = createBlock(\`<p>antony</p>\`);
+  let block1 = createBlock(\`<p>antony</p>\`);
   
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1;
-    const b2 = block2();
-    ctx[zero] = b2;
+    const b1 = block1();
+    ctx[zero] = b1;
     return callTemplate_1.call(this, ctx, node, key + \`__1\`);
   }
 }"
@@ -941,11 +813,11 @@ exports[`t-call (template calling) t-call with t-set inside and outside 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[\`v\`] = k_block2[i1];
+      ctx[\`v\`] = v_block2[i1];
       ctx[\`v_first\`] = i1 === 0;
-      ctx[\`v_last\`] = i1 === k_block2.length - 1;
+      ctx[\`v_last\`] = i1 === v_block2.length - 1;
       ctx[\`v_index\`] = i1;
-      ctx[\`v_value\`] = v_block2[i1];
+      ctx[\`v_value\`] = k_block2[i1];
       const key1 = ctx['v_index'];
       setContextValue(ctx, \\"val\\", ctx['v'].val);
       ctx = Object.create(ctx);
@@ -1008,11 +880,11 @@ exports[`t-call (template calling) t-call with t-set inside and outside. 2 2`] =
     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[\`v\`] = k_block2[i1];
+      ctx[\`v\`] = v_block2[i1];
       ctx[\`v_first\`] = i1 === 0;
-      ctx[\`v_last\`] = i1 === k_block2.length - 1;
+      ctx[\`v_last\`] = i1 === v_block2.length - 1;
       ctx[\`v_index\`] = i1;
-      ctx[\`v_value\`] = v_block2[i1];
+      ctx[\`v_value\`] = k_block2[i1];
       const key1 = ctx['v_index'];
       setContextValue(ctx, \\"val\\", ctx['v'].val);
       ctx = Object.create(ctx);
@@ -1056,7 +928,7 @@ exports[`t-call (template calling) t-call, conditional and t-set in t-call body
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1
-    let b2, b3;
+    let b2,b3;
     setContextValue(ctx, \\"v1\\", 'elif');
     if (ctx['v1']==='if') {
       b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
@@ -1203,8 +1075,8 @@ exports[`t-call (template calling) with unused body 1`] = `
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1;
-    const b2 = text(\`WHEEE\`);
-    ctx[zero] = b2;
+    const b1 = text(\`WHEEE\`);
+    ctx[zero] = b1;
     return callTemplate_1.call(this, ctx, node, key + \`__1\`);
   }
 }"
@@ -1264,8 +1136,8 @@ exports[`t-call (template calling) with used body 1`] = `
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1;
-    const b2 = text(\`ok\`);
-    ctx[zero] = b2;
+    const b1 = text(\`ok\`);
+    ctx[zero] = b1;
     return callTemplate_1.call(this, ctx, node, key + \`__1\`);
   }
 }"

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

@@ -1,29 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`t-custom can use t-custom directive on a node 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div class=\\"my-div\\" block-handler-0=\\"click\\"/>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [ctx['click'], ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;
-
-exports[`t-custom can use t-custom directive with modifiers on a node 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div class=\\"my-div\\" block-handler-0=\\"click\\"/>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let hdlr1 = [ctx['click'], ctx];
-    return block1([hdlr1]);
-  }
-}"
-`;

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

@@ -49,27 +49,6 @@ exports[`debugging t-debug on sub template 2`] = `
 }"
 `;
 
-exports[`debugging t-debug: interaction with t-set 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  let block1 = createBlock(\`<span><block-text-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    debugger;
-    setContextValue(ctx, \\"foo\\", 42);
-    debugger;
-    setContextValue(ctx, \\"bar\\", 49);
-    let txt1 = ctx['foo']+ctx['bar'];
-    return block1([txt1]);
-  }
-}"
-`;
-
 exports[`debugging t-log 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
@@ -87,24 +66,3 @@ exports[`debugging t-log 1`] = `
   }
 }"
 `;
-
-exports[`debugging t-log: interaction with t-set 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  let block1 = createBlock(\`<span><block-text-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    console.log(ctx['foo']);
-    setContextValue(ctx, \\"foo\\", 42);
-    console.log(ctx['bar']);
-    setContextValue(ctx, \\"bar\\", 49);
-    let txt1 = ctx['foo']+ctx['bar'];
-    return block1([txt1]);
-  }
-}"
-`;

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

@@ -1,41 +1,5 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`t-esc default with backslash at top level 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { withDefault } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return text(withDefault(undefined, \`\\\\\\\\\`));
-  }
-}"
-`;
-
-exports[`t-esc default with backtick at top-level 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { withDefault } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return text(withDefault(undefined, \`\\\\\`\`));
-  }
-}"
-`;
-
-exports[`t-esc default with interpolation sigil at top level 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { withDefault } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return text(withDefault(undefined, \`\\\\\${very cool}\`));
-  }
-}"
-`;
-
 exports[`t-esc div with falsy values 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
@@ -216,15 +180,15 @@ exports[`t-esc t-esc=0 is escaped 1`] = `
   const callTemplate_1 = app.getTemplate(\`sub\`);
   
   let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block3 = createBlock(\`<p>escaped</p>\`);
+  let block2 = createBlock(\`<p>escaped</p>\`);
   
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1;
-    const b3 = block3();
-    ctx[zero] = b3;
-    const b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
-    return block1([], [b2]);
+    const b2 = block2();
+    ctx[zero] = b2;
+    const b3 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
+    return block1([], [b3]);
   }
 }"
 `;

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

@@ -12,7 +12,7 @@ exports[`t-foreach does not pollute the rendering context 1`] = `
     ctx = Object.create(ctx);
     const [k_block2, v_block2, l_block2, c_block2] = prepareList([1]);;
     for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`item\`] = k_block2[i1];
+      ctx[\`item\`] = v_block2[i1];
       const key1 = ctx['item'];
       c_block2[i1] = withKey(text(ctx['item']), key1);
     }
@@ -35,7 +35,7 @@ exports[`t-foreach iterate on items (on a element node) 1`] = `
     ctx = Object.create(ctx);
     const [k_block2, v_block2, l_block2, c_block2] = prepareList([1,2]);;
     for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`item\`] = k_block2[i1];
+      ctx[\`item\`] = v_block2[i1];
       const key1 = ctx['item'];
       let txt1 = ctx['item'];
       c_block2[i1] = withKey(block3([txt1]), key1);
@@ -58,9 +58,9 @@ exports[`t-foreach iterate on items 1`] = `
     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\`] = k_block2[i1];
+      ctx[\`item\`] = v_block2[i1];
       ctx[\`item_index\`] = i1;
-      ctx[\`item_value\`] = v_block2[i1];
+      ctx[\`item_value\`] = k_block2[i1];
       const key1 = ctx['item'];
       const b4 = text(\` [\`);
       const b5 = text(ctx['item_index']);
@@ -77,62 +77,6 @@ exports[`t-foreach iterate on items 1`] = `
 }"
 `;
 
-exports[`t-foreach iterate, Map param 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { prepareList, withKey } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    const [k_block1, v_block1, l_block1, c_block1] = prepareList(ctx['value']);;
-    for (let i1 = 0; i1 < l_block1; i1++) {
-      ctx[\`item\`] = k_block1[i1];
-      ctx[\`item_index\`] = i1;
-      ctx[\`item_value\`] = v_block1[i1];
-      const key1 = ctx['item_index'];
-      const b3 = text(\` [\`);
-      const b4 = text(ctx['item_index']);
-      const b5 = text(\`: \`);
-      const b6 = text(ctx['item']);
-      const b7 = text(\` \`);
-      const b8 = text(ctx['item_value']);
-      const b9 = text(\`] \`);
-      c_block1[i1] = withKey(multi([b3, b4, b5, b6, b7, b8, b9]), key1);
-    }
-    return list(c_block1);
-  }
-}"
-`;
-
-exports[`t-foreach iterate, Set param 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { prepareList, withKey } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    const [k_block1, v_block1, l_block1, c_block1] = prepareList(ctx['value']);;
-    for (let i1 = 0; i1 < l_block1; i1++) {
-      ctx[\`item\`] = k_block1[i1];
-      ctx[\`item_index\`] = i1;
-      ctx[\`item_value\`] = v_block1[i1];
-      const key1 = ctx['item_index'];
-      const b3 = text(\` [\`);
-      const b4 = text(ctx['item_index']);
-      const b5 = text(\`: \`);
-      const b6 = text(ctx['item']);
-      const b7 = text(\` \`);
-      const b8 = text(ctx['item_value']);
-      const b9 = text(\`] \`);
-      c_block1[i1] = withKey(multi([b3, b4, b5, b6, b7, b8, b9]), key1);
-    }
-    return list(c_block1);
-  }
-}"
-`;
-
 exports[`t-foreach iterate, dict param 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
@@ -145,9 +89,9 @@ exports[`t-foreach iterate, dict param 1`] = `
     ctx = Object.create(ctx);
     const [k_block2, v_block2, l_block2, c_block2] = prepareList(ctx['value']);;
     for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`item\`] = k_block2[i1];
+      ctx[\`item\`] = v_block2[i1];
       ctx[\`item_index\`] = i1;
-      ctx[\`item_value\`] = v_block2[i1];
+      ctx[\`item_value\`] = k_block2[i1];
       const key1 = ctx['item_index'];
       const b4 = text(\` [\`);
       const b5 = text(ctx['item_index']);
@@ -164,62 +108,6 @@ exports[`t-foreach iterate, dict param 1`] = `
 }"
 `;
 
-exports[`t-foreach iterate, generator param 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { prepareList, withKey } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    const [k_block1, v_block1, l_block1, c_block1] = prepareList(ctx['gen']());;
-    for (let i1 = 0; i1 < l_block1; i1++) {
-      ctx[\`item\`] = k_block1[i1];
-      ctx[\`item_index\`] = i1;
-      ctx[\`item_value\`] = v_block1[i1];
-      const key1 = ctx['item_index'];
-      const b3 = text(\` [\`);
-      const b4 = text(ctx['item_index']);
-      const b5 = text(\`: \`);
-      const b6 = text(ctx['item']);
-      const b7 = text(\` \`);
-      const b8 = text(ctx['item_value']);
-      const b9 = text(\`] \`);
-      c_block1[i1] = withKey(multi([b3, b4, b5, b6, b7, b8, b9]), key1);
-    }
-    return list(c_block1);
-  }
-}"
-`;
-
-exports[`t-foreach iterate, iterable param 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { prepareList, withKey } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    const [k_block1, v_block1, l_block1, c_block1] = prepareList(ctx['map'].values());;
-    for (let i1 = 0; i1 < l_block1; i1++) {
-      ctx[\`item\`] = k_block1[i1];
-      ctx[\`item_index\`] = i1;
-      ctx[\`item_value\`] = v_block1[i1];
-      const key1 = ctx['item_index'];
-      const b3 = text(\` [\`);
-      const b4 = text(ctx['item_index']);
-      const b5 = text(\`: \`);
-      const b6 = text(ctx['item']);
-      const b7 = text(\` \`);
-      const b8 = text(ctx['item_value']);
-      const b9 = text(\`] \`);
-      c_block1[i1] = withKey(multi([b3, b4, b5, b6, b7, b8, b9]), key1);
-    }
-    return list(c_block1);
-  }
-}"
-`;
-
 exports[`t-foreach iterate, position 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
@@ -232,12 +120,12 @@ exports[`t-foreach iterate, position 1`] = `
     ctx = Object.create(ctx);
     const [k_block2, v_block2, l_block2, c_block2] = prepareList(Array(5));;
     for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`elem\`] = k_block2[i1];
+      ctx[\`elem\`] = v_block2[i1];
       ctx[\`elem_first\`] = i1 === 0;
-      ctx[\`elem_last\`] = i1 === k_block2.length - 1;
+      ctx[\`elem_last\`] = i1 === v_block2.length - 1;
       ctx[\`elem_index\`] = i1;
       const key1 = ctx['elem'];
-      let b4, b5, b6, b7, b8, b9;
+      let b4,b5,b6,b7,b8,b9;
       b4 = text(\` -\`);
       if (ctx['elem_first']) {
         b5 = text(\` first\`);
@@ -256,34 +144,6 @@ exports[`t-foreach iterate, position 1`] = `
 }"
 `;
 
-exports[`t-foreach iterate, string param 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { prepareList, withKey } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    const [k_block1, v_block1, l_block1, c_block1] = prepareList('abc');;
-    for (let i1 = 0; i1 < l_block1; i1++) {
-      ctx[\`item\`] = k_block1[i1];
-      ctx[\`item_index\`] = i1;
-      ctx[\`item_value\`] = v_block1[i1];
-      const key1 = ctx['item_index'];
-      const b3 = text(\` [\`);
-      const b4 = text(ctx['item_index']);
-      const b5 = text(\`: \`);
-      const b6 = text(ctx['item']);
-      const b7 = text(\` \`);
-      const b8 = text(ctx['item_value']);
-      const b9 = text(\`] \`);
-      c_block1[i1] = withKey(multi([b3, b4, b5, b6, b7, b8, b9]), key1);
-    }
-    return list(c_block1);
-  }
-}"
-`;
-
 exports[`t-foreach simple iteration (in a node) 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
@@ -296,7 +156,7 @@ exports[`t-foreach simple iteration (in a node) 1`] = `
     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\`] = k_block2[i1];
+      ctx[\`item\`] = v_block2[i1];
       const key1 = ctx['item'];
       c_block2[i1] = withKey(text(ctx['item']), key1);
     }
@@ -316,7 +176,7 @@ exports[`t-foreach simple iteration 1`] = `
     ctx = Object.create(ctx);
     const [k_block1, v_block1, l_block1, c_block1] = prepareList([3,2,1]);;
     for (let i1 = 0; i1 < l_block1; i1++) {
-      ctx[\`item\`] = k_block1[i1];
+      ctx[\`item\`] = v_block1[i1];
       const key1 = ctx['item'];
       c_block1[i1] = withKey(text(ctx['item']), key1);
     }
@@ -338,7 +198,7 @@ exports[`t-foreach simple iteration with two nodes inside 1`] = `
     ctx = Object.create(ctx);
     const [k_block1, v_block1, l_block1, c_block1] = prepareList([3,2,1]);;
     for (let i1 = 0; i1 < l_block1; i1++) {
-      ctx[\`item\`] = k_block1[i1];
+      ctx[\`item\`] = v_block1[i1];
       const key1 = ctx['item'];
       let txt1 = ctx['item'];
       const b3 = block3([txt1]);
@@ -367,20 +227,20 @@ exports[`t-foreach t-call with body in t-foreach in t-foreach 1`] = `
     ctx = Object.create(ctx);
     const [k_block2, v_block2, l_block2, c_block2] = prepareList(ctx['numbers']);;
     for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`a\`] = k_block2[i1];
+      ctx[\`a\`] = v_block2[i1];
       ctx[\`a_first\`] = i1 === 0;
-      ctx[\`a_last\`] = i1 === k_block2.length - 1;
+      ctx[\`a_last\`] = i1 === v_block2.length - 1;
       ctx[\`a_index\`] = i1;
-      ctx[\`a_value\`] = v_block2[i1];
+      ctx[\`a_value\`] = k_block2[i1];
       const key1 = ctx['a'];
       ctx = Object.create(ctx);
       const [k_block4, v_block4, l_block4, c_block4] = prepareList(ctx['letters']);;
       for (let i2 = 0; i2 < l_block4; i2++) {
-        ctx[\`b\`] = k_block4[i2];
+        ctx[\`b\`] = v_block4[i2];
         ctx[\`b_first\`] = i2 === 0;
-        ctx[\`b_last\`] = i2 === k_block4.length - 1;
+        ctx[\`b_last\`] = i2 === v_block4.length - 1;
         ctx[\`b_index\`] = i2;
-        ctx[\`b_value\`] = v_block4[i2];
+        ctx[\`b_value\`] = k_block4[i2];
         const key2 = ctx['b'];
         ctx = Object.create(ctx);
         ctx[isBoundary] = 1;
@@ -436,20 +296,20 @@ exports[`t-foreach t-call without body in t-foreach in t-foreach 1`] = `
     ctx = Object.create(ctx);
     const [k_block2, v_block2, l_block2, c_block2] = prepareList(ctx['numbers']);;
     for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`a\`] = k_block2[i1];
+      ctx[\`a\`] = v_block2[i1];
       ctx[\`a_first\`] = i1 === 0;
-      ctx[\`a_last\`] = i1 === k_block2.length - 1;
+      ctx[\`a_last\`] = i1 === v_block2.length - 1;
       ctx[\`a_index\`] = i1;
-      ctx[\`a_value\`] = v_block2[i1];
+      ctx[\`a_value\`] = k_block2[i1];
       const key1 = ctx['a'];
       ctx = Object.create(ctx);
       const [k_block4, v_block4, l_block4, c_block4] = prepareList(ctx['letters']);;
       for (let i2 = 0; i2 < l_block4; i2++) {
-        ctx[\`b\`] = k_block4[i2];
+        ctx[\`b\`] = v_block4[i2];
         ctx[\`b_first\`] = i2 === 0;
-        ctx[\`b_last\`] = i2 === k_block4.length - 1;
+        ctx[\`b_last\`] = i2 === v_block4.length - 1;
         ctx[\`b_index\`] = i2;
-        ctx[\`b_value\`] = v_block4[i2];
+        ctx[\`b_value\`] = k_block4[i2];
         const key2 = ctx['b'];
         c_block4[i2] = withKey(callTemplate_1.call(this, ctx, node, key + \`__1__\${key1}__\${key2}\`), key2);
       }
@@ -503,12 +363,12 @@ exports[`t-foreach t-foreach in t-foreach 1`] = `
     ctx = Object.create(ctx);
     const [k_block2, v_block2, l_block2, c_block2] = prepareList(ctx['numbers']);;
     for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`number\`] = k_block2[i1];
+      ctx[\`number\`] = v_block2[i1];
       const key1 = ctx['number'];
       ctx = Object.create(ctx);
       const [k_block3, v_block3, l_block3, c_block3] = prepareList(ctx['letters']);;
       for (let i2 = 0; i2 < l_block3; i2++) {
-        ctx[\`letter\`] = k_block3[i2];
+        ctx[\`letter\`] = v_block3[i2];
         const key2 = ctx['letter'];
         const b5 = text(\` [\`);
         const b6 = text(ctx['number']);
@@ -537,7 +397,7 @@ exports[`t-foreach t-foreach with t-if inside (no external node) 1`] = `
     ctx = Object.create(ctx);
     const [k_block1, v_block1, l_block1, c_block1] = prepareList(ctx['elems']);;
     for (let i1 = 0; i1 < l_block1; i1++) {
-      ctx[\`elem\`] = k_block1[i1];
+      ctx[\`elem\`] = v_block1[i1];
       const key1 = ctx['elem'].id;
       let b3;
       if (ctx['elem'].id<3) {
@@ -564,7 +424,7 @@ exports[`t-foreach t-foreach with t-if inside 1`] = `
     ctx = Object.create(ctx);
     const [k_block2, v_block2, l_block2, c_block2] = prepareList(ctx['elems']);;
     for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`elem\`] = k_block2[i1];
+      ctx[\`elem\`] = v_block2[i1];
       const key1 = ctx['elem'].id;
       let b4;
       if (ctx['elem'].id<3) {
@@ -592,7 +452,7 @@ exports[`t-foreach t-key on t-foreach 1`] = `
     ctx = Object.create(ctx);
     const [k_block2, v_block2, l_block2, c_block2] = prepareList(ctx['things']);;
     for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`thing\`] = k_block2[i1];
+      ctx[\`thing\`] = v_block2[i1];
       const key1 = ctx['thing'];
       c_block2[i1] = withKey(block3(), key1);
     }
@@ -615,7 +475,7 @@ exports[`t-foreach throws error if invalid loop expression 1`] = `
     ctx = Object.create(ctx);
     const [k_block2, v_block2, l_block2, c_block2] = prepareList(ctx['abc']);;
     for (let i1 = 0; i1 < l_block2; i1++) {
-      ctx[\`item\`] = k_block2[i1];
+      ctx[\`item\`] = v_block2[i1];
       ctx[\`item_index\`] = i1;
       const key1 = ctx['item'];
       const tKey_1 = ctx['item_index'];
@@ -642,7 +502,7 @@ exports[`t-foreach with t-memo 1`] = `
     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\`] = k_block2[i1];
+      ctx[\`item\`] = v_block2[i1];
       const key1 = ctx['item'].id;
       const memo1 = [ctx['item'].x];
       const vnode1 = cache[key1];;

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

@@ -8,7 +8,7 @@ exports[`t-if a t-if next to a div 1`] = `
   let block2 = createBlock(\`<div>foo</div>\`);
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3;
+    let b2,b3;
     b2 = block2();
     if (ctx['cond']) {
       b3 = text(\`1\`);
@@ -44,7 +44,7 @@ exports[`t-if boolean value condition elif (no outside node) 1`] = `
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3, b4, b5;
+    let b2,b3,b4,b5;
     if (ctx['color']=='black') {
       b2 = text(\`black pearl\`);
     } else if (ctx['color']=='yellow') {
@@ -67,7 +67,7 @@ exports[`t-if boolean value condition elif 1`] = `
   let block1 = createBlock(\`<div><block-child-0/><block-child-1/><block-child-2/><block-child-3/></div>\`);
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3, b4, b5;
+    let b2,b3,b4,b5;
     if (ctx['color']=='black') {
       b2 = text(\`black pearl\`);
     } else if (ctx['color']=='yellow') {
@@ -90,7 +90,7 @@ exports[`t-if boolean value condition else 1`] = `
   let block1 = createBlock(\`<div><span>begin</span><block-child-0/><block-child-1/><span>end</span></div>\`);
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3;
+    let b2,b3;
     if (ctx['condition']) {
       b2 = text(\`ok\`);
     } else {
@@ -109,7 +109,7 @@ exports[`t-if boolean value condition false else 1`] = `
   let block1 = createBlock(\`<div><span>begin</span><block-child-0/><block-child-1/><span>end</span></div>\`);
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3;
+    let b2,b3;
     if (ctx['condition']) {
       b2 = text(\`fail\`);
     } else {
@@ -145,7 +145,7 @@ exports[`t-if can use some boolean operators in expressions 1`] = `
   let block1 = createBlock(\`<div><block-child-0/><block-child-1/><block-child-2/><block-child-3/><block-child-4/><block-child-5/><block-child-6/><block-child-7/></div>\`);
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3, b4, b5, b6, b7, b8, b9;
+    let b2,b3,b4,b5,b6,b7,b8,b9;
     if (ctx['cond1']&&ctx['cond2']) {
       b2 = text(\`and\`);
     }
@@ -239,7 +239,7 @@ exports[`t-if simple t-if/t-else 1`] = `
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3;
+    let b2,b3;
     if (ctx['condition']) {
       b2 = text(\`1\`);
     } else {
@@ -258,7 +258,7 @@ exports[`t-if simple t-if/t-else in a div 1`] = `
   let block1 = createBlock(\`<div><block-child-0/><block-child-1/></div>\`);
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3;
+    let b2,b3;
     if (ctx['condition']) {
       b2 = text(\`1\`);
     } else {
@@ -277,7 +277,7 @@ exports[`t-if t-esc with t-elif 1`] = `
   let block1 = createBlock(\`<div><block-child-0/><block-child-1/></div>\`);
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3;
+    let b2,b3;
     if (false) {
       b2 = text(\`abc\`);
     } else {
@@ -314,7 +314,7 @@ exports[`t-if t-if and t-else with two nodes 1`] = `
   let block5 = createBlock(\`<span>b</span>\`);
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3;
+    let b2,b3;
     if (ctx['condition']) {
       b2 = text(\`1\`);
     } else {
@@ -372,7 +372,7 @@ exports[`t-if t-if with empty content 1`] = `
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3;
+    let b2,b3;
     b2 = text(\`hello\`);
     if (ctx['condition']) {
       b3 = text(\`\`);
@@ -388,7 +388,7 @@ exports[`t-if t-if/t-else with more content 1`] = `
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3;
+    let b2,b3;
     if (ctx['condition']) {
       if (ctx['condition']) {
         b2 = text(\`asf\`);
@@ -458,7 +458,7 @@ exports[`t-if t-set, then t-if, part 3 1`] = `
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1
-    let b2, b3;
+    let b2,b3;
     setContextValue(ctx, \\"y\\", false);
     setContextValue(ctx, \\"x\\", ctx['y']);
     if (ctx['x']) {
@@ -477,7 +477,7 @@ exports[`t-if two consecutive t-if 1`] = `
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3;
+    let b2,b3;
     if (ctx['cond1']) {
       b2 = text(\`1\`);
     }
@@ -497,7 +497,7 @@ exports[`t-if two consecutive t-if in a div 1`] = `
   let block1 = createBlock(\`<div><block-child-0/><block-child-1/></div>\`);
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3;
+    let b2,b3;
     if (ctx['cond1']) {
       b2 = text(\`1\`);
     }
@@ -520,7 +520,7 @@ exports[`t-if two t-ifs next to each other 1`] = `
   let block5 = createBlock(\`<p>2</p>\`);
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3;
+    let b2,b3;
     if (ctx['condition']) {
       let txt1 = ctx['text'];
       b2 = block2([txt1]);

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

@@ -58,7 +58,7 @@ exports[`t-key t-key directive in a list 1`] = `
     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\`] = k_block2[i1];
+      ctx[\`beer\`] = v_block2[i1];
       const key1 = ctx['beer'].id;
       let txt1 = ctx['beer'].name;
       c_block2[i1] = withKey(block3([txt1]), key1);
@@ -79,7 +79,7 @@ exports[`t-key t-key on sub dom node pushes a child block in its parent 1`] = `
   let block3 = createBlock(\`<div><h1/></div>\`);
   
   return function template(ctx, node, key = \\"\\") {
-    let b2, b3;
+    let b2,b3;
     if (ctx['hasSpan']) {
       b2 = block2();
     }
@@ -103,18 +103,3 @@ exports[`t-key t-key on sub dom node pushes a child block in its parent 2`] = `
   }
 }"
 `;
-
-exports[`t-key t-key: interaction with t-esc 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<p><block-text-0/></p>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const tKey_1 = ctx['key'];
-    let txt1 = ctx['text'];
-    return toggler(tKey_1, block1([txt1]));
-  }
-}"
-`;

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

@@ -35,15 +35,15 @@ exports[`t-out multiple calls to t-out 1`] = `
   const callTemplate_1 = app.getTemplate(\`sub\`);
   
   let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block3 = createBlock(\`<span>coucou</span>\`);
+  let block2 = createBlock(\`<span>coucou</span>\`);
   
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1;
-    const b3 = block3();
-    ctx[zero] = b3;
-    const b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
-    return block1([], [b2]);
+    const b2 = block2();
+    ctx[zero] = b2;
+    const b3 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
+    return block1([], [b3]);
   }
 }"
 `;
@@ -102,15 +102,15 @@ exports[`t-out t-out 0 1`] = `
   const callTemplate_1 = app.getTemplate(\`_basic-callee\`);
   
   let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  let block3 = createBlock(\`<div>zero</div>\`);
+  let block2 = createBlock(\`<div>zero</div>\`);
   
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1;
-    const b3 = block3();
-    ctx[zero] = b3;
-    const b2 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
-    return block1([], [b2]);
+    const b2 = block2();
+    ctx[zero] = b2;
+    const b3 = callTemplate_1.call(this, ctx, node, key + \`__1\`);
+    return block1([], [b3]);
   }
 }"
 `;
@@ -309,7 +309,7 @@ exports[`t-out t-out switch markup on bdom 1`] = `
   return function template(ctx, node, key = \\"\\") {
     ctx = Object.create(ctx);
     ctx[isBoundary] = 1
-    let b3, b5;
+    let b3,b5;
     ctx[\`bdom\`] = new LazyValue(value1, ctx, this, node, key);
     if (ctx['hasBdom']) {
       const b4 = safeOutput(ctx['bdom']);

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

@@ -105,7 +105,7 @@ exports[`t-ref refs in a loop 1`] = `
     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\`] = k_block2[i1];
+      ctx[\`item\`] = v_block2[i1];
       const key1 = ctx['item'];
       const tKey_1 = ctx['item'];
       const v1 = ctx['item'];

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

@@ -1,50 +1,5 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`t-set body with backslash at top level 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"value\\", \`\\\\\\\\\`);
-    return text(ctx['value']);
-  }
-}"
-`;
-
-exports[`t-set body with backtick at top-level 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"value\\", \`\\\\\`\`);
-    return text(ctx['value']);
-  }
-}"
-`;
-
-exports[`t-set body with interpolation sigil at top level 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"value\\", \`\\\\\${very cool}\`);
-    return text(ctx['value']);
-  }
-}"
-`;
-
 exports[`t-set evaluate value expression 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
@@ -139,7 +94,7 @@ exports[`t-set set from body literal (with t-if/t-else 1`] = `
   let { isBoundary, withDefault, LazyValue } = helpers;
   
   function value1(ctx, node, key = \\"\\") {
-    let b2, b3;
+    let b2,b3;
     if (ctx['condition']) {
       b2 = text(\`true\`);
     } else {
@@ -396,7 +351,7 @@ exports[`t-set t-set outside modified in t-foreach 1`] = `
     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\`] = k_block2[i1];
+      ctx[\`val\`] = v_block2[i1];
       const key1 = ctx['val'];
       let txt1 = ctx['iter'];
       c_block2[i1] = withKey(block3([txt1]), key1);
@@ -426,7 +381,7 @@ exports[`t-set t-set outside modified in t-foreach increment-after operator 1`]
     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\`] = k_block2[i1];
+      ctx[\`val\`] = v_block2[i1];
       const key1 = ctx['val'];
       let txt1 = ctx['iter'];
       c_block2[i1] = withKey(block3([txt1]), key1);
@@ -456,7 +411,7 @@ exports[`t-set t-set outside modified in t-foreach increment-before operator 1`]
     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\`] = k_block2[i1];
+      ctx[\`val\`] = v_block2[i1];
       const key1 = ctx['val'];
       let txt1 = ctx['iter'];
       c_block2[i1] = withKey(block3([txt1]), key1);
@@ -486,7 +441,7 @@ exports[`t-set t-set should reuse variable if possible 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\`] = k_block2[i1];
+      ctx[\`elem\`] = v_block2[i1];
       ctx[\`elem_index\`] = i1;
       const key1 = ctx['elem_index'];
       let txt1 = ctx['v'];

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

@@ -1,13 +0,0 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
-
-exports[`t-slot compile t-props correctly multiple time 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { callSlot } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    return callSlot(ctx, node, key, 'default', false, Object.assign({}, {a:1}));
-  }
-}"
-`;

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

@@ -101,55 +101,3 @@ exports[`loading templates can load a few templates from an XMLDocument 2`] = `
   }
 }"
 `;
-
-exports[`loading templates getTemplate: element returned (2) 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>Hello World!</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`loading templates getTemplate: element returned 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>Hello World!</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`loading templates getTemplate: template string returned 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>Hello World!</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`loading templates getTemplate: undefined returned 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div>Hello World!</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;

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

@@ -1,233 +1,5 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`translation context body of t-sets are translated in context 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"label\\", \`traduit\`);
-    return text(ctx['label']);
-  }
-}"
-`;
-
-exports[`translation context default slot params and content translated in context 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { callSlot } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  
-  function defaultContent1(ctx, node, key = \\"\\") {
-    return text(\` foo \`);
-  }
-  
-  return function template(ctx, node, key = \\"\\") {
-    const b3 = callSlot(ctx, node, key, 'default', false, {param: \`param\`,title: \`título\`}, defaultContent1.bind(this));
-    return block1([], [b3]);
-  }
-}"
-`;
-
-exports[`translation context props with modifier .translate are translated in context 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  const comp1 = app.createComponent(\`ChildComponent\`, true, false, false, []);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return comp1({text: \`jeu\`}, key + \`__1\`, node, this, null);
-  }
-}"
-`;
-
-exports[`translation context props with modifier .translate are translated in context 2`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<span><block-text-0/></span>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let txt1 = ctx['props'].text;
-    return block1([txt1]);
-  }
-}"
-`;
-
-exports[`translation context slot attrs and text contents are translated in context 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { capture, markRaw } = helpers;
-  const comp1 = app.createComponent(\`ChildComponent\`, true, true, false, []);
-  
-  function slot1(ctx, node, key = \\"\\") {
-    return text(\`jeu\`);
-  }
-  
-  return function template(ctx, node, key = \\"\\") {
-    const ctx1 = capture(ctx);
-    return comp1({slots: markRaw({'a': {__render: slot1.bind(this), __ctx: ctx1, title: \`título\`}})}, key + \`__1\`, node, this, null);
-  }
-}"
-`;
-
-exports[`translation context slot attrs and text contents are translated in context 2`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { callSlot } = helpers;
-  
-  let block1 = createBlock(\`<div><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const b2 = callSlot(ctx, node, key, 'a', false, {});
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`translation context t-translation-context with several children 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><div/><div/><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2;
-    if (true) {
-      b2 = text(\`\`);
-    }
-    return block1([], [b2]);
-  }
-}"
-`;
-
-exports[`translation context translation of attributes in context 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div title=\\"titre\\" label=\\"game\\"/>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    return block1();
-  }
-}"
-`;
-
-exports[`translation context translation of text in context 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block2 = createBlock(\`<div>word</div>\`);
-  let block3 = createBlock(\`<div>mot</div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    const b2 = block2();
-    const b3 = block3();
-    return multi([b2, b3]);
-  }
-}"
-`;
-
-exports[`translation support body of t-sets are translated 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"label\\", \`translated\`);
-    return text(ctx['label']);
-  }
-}"
-`;
-
-exports[`translation support body of t-sets inside translation=off are not translated 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"label\\", \`untranslated\`);
-    return text(ctx['label']);
-  }
-}"
-`;
-
-exports[`translation support body of t-sets inside translation=off are not translated 2 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"label\\", \`untranslated\`);
-    return text(ctx['label']);
-  }
-}"
-`;
-
-exports[`translation support body of t-sets with html content are translated 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { isBoundary, withDefault, LazyValue, safeOutput } = helpers;
-  
-  let block1 = createBlock(\`<div>translated</div>\`);
-  
-  function value1(ctx, node, key = \\"\\") {
-    return block1();
-  }
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    ctx[\`label\`] = new LazyValue(value1, ctx, this, node, key);
-    return safeOutput(ctx['label']);
-  }
-}"
-`;
-
-exports[`translation support body of t-sets with text and html content are translated 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { isBoundary, withDefault, LazyValue, safeOutput } = helpers;
-  
-  let block3 = createBlock(\`<div>translated</div>\`);
-  
-  function value1(ctx, node, key = \\"\\") {
-    const b2 = text(\` translated \`);
-    const b3 = block3();
-    return multi([b2, b3]);
-  }
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    ctx[\`label\`] = new LazyValue(value1, ctx, this, node, key);
-    return safeOutput(ctx['label']);
-  }
-}"
-`;
-
 exports[`translation support can set and remove translatable attributes 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
@@ -280,38 +52,6 @@ exports[`translation support some attributes are translated 1`] = `
 }"
 `;
 
-exports[`translation support t-set and falsy t-value: t-body are translated 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  let { isBoundary, withDefault, setContextValue } = helpers;
-  
-  return function template(ctx, node, key = \\"\\") {
-    ctx = Object.create(ctx);
-    ctx[isBoundary] = 1
-    setContextValue(ctx, \\"label\\", withDefault(false, \`translated\`));
-    return text(ctx['label']);
-  }
-}"
-`;
-
-exports[`translation support t-translation with several children 1`] = `
-"function anonymous(app, bdom, helpers
-) {
-  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
-  
-  let block1 = createBlock(\`<div><div/><div/><block-child-0/></div>\`);
-  
-  return function template(ctx, node, key = \\"\\") {
-    let b2;
-    if (true) {
-      b2 = text(\`\`);
-    }
-    return block1([], [b2]);
-  }
-}"
-`;
-
 exports[`translation support translation is done on the trimmed text, with extra spaces readded after 1`] = `
 "function anonymous(app, bdom, helpers
 ) {

tests/compiler/attributes.test.ts

@@ -371,33 +371,4 @@ describe("attributes", () => {
     // not sure about this. maybe we want to remove the attribute?
     expect(fixture.innerHTML).toBe('<div class="hoy a b"></div>');
   });
-
-  test("various combinations of class, t-att-class, and t-att", () => {
-    const template1 = `<div t-att="{ class: 'a' }" class="c">content</div>`;
-    expect(renderToString(template1)).toBe('<div class="c a">content</div>');
-
-    const template2 = `<div t-att="{ class: 'a' }" t-att-class="{'b': true}" class="c">content</div>`;
-    expect(renderToString(template2)).toBe('<div class="c a b">content</div>');
-
-    const template3 = `<div t-att="{ class: 'a' }" class="c" t-att-class="{'b': true}">content</div>`;
-    expect(renderToString(template3)).toBe('<div class="c a b">content</div>');
-
-    const template4 = `<div class="c" t-att="{ class: 'a' }" t-att-class="{'b': true}">content</div>`;
-    expect(renderToString(template4)).toBe('<div class="c a b">content</div>');
-
-    const template5 = `<div class="c" t-att-class="{'b': true}" t-att="{ class: 'a' }">content</div>`;
-    expect(renderToString(template5)).toBe('<div class="c b a">content</div>');
-
-    const template6 = `<div class="c" t-att-class="{'b': true}">content</div>`;
-    expect(renderToString(template6)).toBe('<div class="c b">content</div>');
-
-    const template7 = `<div class="c" t-attf-class="{{'b'}}">content</div>`;
-    expect(renderToString(template7)).toBe('<div class="c b">content</div>');
-
-    const template8 = `<div t-att="{ class: 'a' }" class="c" t-att-class="{'b': true}">content</div>`;
-    expect(renderToString(template8)).toBe('<div class="c a b">content</div>');
-
-    const template9 = `<div t-att="{ class: 'a' }" t-att-class="{'b': true}">content</div>`;
-    expect(renderToString(template9)).toBe('<div class="a b">content</div>');
-  });
 });