[REL] v1.0.11

# Owl v1.0.11

- improve release script to make sure we get correct code on npm

.gitignore

@@ -1,5 +1,6 @@
 /node_modules
 /dist
+
 npm-debug.log
 
 # misc
@@ -14,4 +15,15 @@ yarn-debug.log*
 yarn-error.log*
 
 package-lock.json
-.vscode
+yarn.lock
+
+#ide's
+.vscode
+.idea
+
+node_modules
+
+# Extras temp file
+/tools/owl.js
+
+release-notes.md

COPYRIGHT

@@ -0,0 +1,14 @@
+
+Most of the files are
+
+  Copyright (c) 2004-2015 Odoo S.A.
+
+Many files also contain contributions from third
+parties. In this case the original copyright of
+the contributions can be traced through the
+history of the source version control system.
+
+When that is not the case, the files contain a prominent
+notice stating the original copyright and applicable
+license, or come with their own dedicated COPYRIGHT
+and/or LICENSE file.

LICENSE

@@ -1,12 +1,9 @@
-
-For copyright information, please see the COPYRIGHT file.
-
-Odoo is published under the GNU LESSER GENERAL PUBLIC LICENSE, Version 3
+OWL is published under the GNU LESSER GENERAL PUBLIC LICENSE, Version 3
 (LGPLv3), as included below. Since the LGPL is a set of additional
 permissions on top of the GPL, the text of the GPL is included at the
 bottom as well.
 
-Some external libraries and contributions bundled with Odoo may be published
+Some external libraries and contributions bundled with OWL may be published
 under other GPL-compatible licenses. For these, please refer to the relevant
 source files and/or license files, in the source code tree.
 

README.md

@@ -1,124 +1,129 @@
-<h1 align="center">🦉 Odoo Web Lab 🦉</h1>
+<h1 align="center">🦉 <a href="https://odoo.github.io/owl/">OWL Framework</a> 🦉</h1>
+
+_Class based components with hooks, reactive state and concurrent mode_
 
 ## Project Overview
 
-Odoo Web Lab (OWL) is a project to collect some useful, reusable, (hopefully)
-well designed building blocks for building web applications. However, since this is the basis for the Odoo web client, we will not hesitate
-to design the code here to better match the Odoo architecture/design principles.
+The Odoo Web Library (OWL) is a smallish (~<20kb gzipped) UI framework intended to
+be the basis for the [Odoo](https://www.odoo.com/) Web Client. Owl is a modern
+framework, written in Typescript, taking the best ideas from React and Vue in a
+simple and consistent way. Owl's main features are:
 
-The most important element of this repository is certainly the component system.
-It is designed to be:
+- a declarative component system,
+- a reactivity system based on hooks,
+- concurrent mode by default,
+- a store and a frontend router
 
-1. **declarative:** the user interface should be described in term of the state
-   of the application, not as a sequence of imperative steps.
+Owl components are defined with ES6 classes, they use QWeb templates, an
+underlying virtual DOM, integrates beautifully with hooks, and the rendering is
+asynchronous.
 
-2. **composable:** each widget can seamlessly be created in a parent widget by
-   a simple directive in its template.
+**Try it online!** An online playground is available at
+[https://odoo.github.io/owl/playground](https://odoo.github.io/owl/playground)
+to let you experiment with the Owl framework. There are some code examples to
+showcase some interesting features.
 
-3. **asynchronous rendering:** the framework will transparently wait for each
-   subwidgets to be ready before applying the rendering. It uses native promises
-   under the hood.
+Owl is currently stable.  Possible future changes are explained in the
+[roadmap](roadmap.md).
 
-4. **uses QWeb as a template system:** the templates are described in XML
-   and follow the QWeb specification. This is a requirement for Odoo.
+## Why Owl?
 
-5. **with an imperative escape hatch:** if necessary, sub widgets can easily be
-   manually created/destroyed.
+Why did Odoo decide to make Yet Another Framework?  This is really a question
+that deserves [a long answer](doc/miscellaneous/why_owl.md). But in short, we believe that
+while the current state of the art frameworks are excellent, they are not
+optimized for our use case, and there is still room for something else.
 
-Note: the code is written in typescript. This does not mean that the main web
-client will ever be converted to typescript (even though I would really like it).
+If you are interested in a comparison with React or Vue, you will
+find some more additional information [here](doc/miscellaneous/comparison.md).
 
-## Try it online
+## Example
 
-You can experiment with the OWL project online: [https://odoo.github.io/owl/](https://odoo.github.io/owl/)
-
-## Installing/Building
-
-Some npm scripts are available:
-
-| Command            | Description                                               |
-| ------------------ | --------------------------------------------------------- |
-| npm install        | install every dependency required for this project        |
-| npm run build      | build a bundle of _owl_ in the _/dist/_ folder            |
-| npm run build:es5  | build a bundle of _owl_ in the _/dist/_ folder (ES5 code) |
-| npm run minify     | minify the prebuilt owl.js file                           |
-| npm run test       | run all tests                                             |
-| npm run test:watch | run all tests, and keep a watcher                         |
-
-## Documentation
-
-The complete documentation can be found [here](doc/readme.md). The most important sections are:
-
-- [Quick Start](doc/quick_start.md)
-- [Tutorial](doc/tutorial.md)
-- [Component](doc/component.md)
-- [QWeb](doc/qweb.md)
-
-# Examples
-
-Here is a minimal Hello World example:
+Here is a short example to illustrate interactive components:
 
 ```javascript
-class HelloWorld extends owl.core.Component {
-  inlineTemplate = `<div>Hello <t t-esc="props.name"/></div>`;
+const { Component, useState } = owl;
+const { xml } = owl.tags;
+
+class Counter extends Component {
+  static template = xml`
+    <button t-on-click="state.value++">
+      Click Me! [<t t-esc="state.value"/>]
+    </button>`;
+
+  state = useState({ value: 0 });
 }
 
-const env = {
-  qweb: new owl.core.QWeb()
-};
-
-const hello = new HelloWorld(env, { name: "World" });
-hello.mount(document.body);
-```
-
-The next example show how interactive widgets can be created and how widget
-composition works:
-
-```javascript
-class Counter extends owl.core.Component {
-  inlineTemplate = `
+class App extends Component {
+  static template = xml`
     <div>
-      <button t-on-click="increment(-1)">-</button>
-      <span style="font-weight:bold">Value: <t t-esc="state.value"/></span>
-      <button t-on-click="increment(1)">+</button>
+      <span>Hello Owl</span>
+      <Counter />
     </div>`;
 
-  constructor(parent, props) {
-    super(parent, props);
-    this.state = {
-      value: props.initialState || 0
-    };
-  }
-
-  increment(delta) {
-    this.updateState({ value: this.state.value + delta });
-  }
+  static components = { Counter };
 }
 
-class App extends owl.core.Component {
-  inlineTemplate = `
-    <div>
-        <t t-widget="Counter" t-props="{initialState: 1}"/>
-        <t t-widget="Counter" t-props="{initialState: 42}"/>
-    </div>`;
-
-  widgets = { Counter };
-}
-
-const env = {
-  qweb: new owl.core.QWeb()
-};
-
-const app = new App(env);
+const app = new App();
 app.mount(document.body);
 ```
 
-More interesting examples on how to work with this web framework can be found in the _examples/_ folder:
+Note that the counter component is made reactive with the [`useState` hook](doc/reference/hooks.md#usestate).
+Also, all examples here uses the [`xml` helper](doc/reference/tags.md#xml-tag) to define inline templates.
+But this is not mandatory, many applications will load templates separately.
 
-- [Todo Application](examples/readme.md#todo-app)
-- [Web Client](examples/readme.md#web-client-example)
-- [Benchmarks](examples/readme.md#benchmarks)
+More interesting examples can be found on the
+[playground](https://odoo.github.io/owl/playground) application.
+
+## Design Principles
+
+OWL is designed to be used in highly dynamic applications where changing
+requirements are common and code needs to be maintained by large teams.
+
+- **XML based**: templates are based on the XML format, which allows interesting
+  applications. For example, they could be stored in a database and modified
+  dynamically with `xpaths`.
+- **templates compilation in the browser**: this may not be a good fit for all
+  applications, but if you need to generate dynamically user interfaces in the
+  browser, this is very powerful. For example, a generic form view component
+  could generate a specific form user interface for each various models, from a XML view.
+- **no toolchain required**: this is extremely useful for some applications, if,
+  for various reasons (security/deployment/dynamic modules/specific assets tools),
+  it is not ok to use standard web tools based on `npm`.
+
+Owl is not designed to be fast nor small (even though it is quite good on those
+two topics). It is a no nonsense framework to build applications. There is only
+one way to define components (with classes). There is no black magic. It just
+works.
+
+
+## Documentation
+
+A complete documentation for Owl can be found here:
+
+- [Main documentation page](doc/readme.md).
+
+Some of the most important pages are:
+
+- [Tutorial: TodoList application](doc/learning/tutorial_todoapp.md)
+- [How to start an Owl project](doc/learning/quick_start.md)
+- [QWeb templating language](doc/reference/qweb_templating_language.md)
+- [Component](doc/reference/component.md)
+- [Hooks](doc/reference/hooks.md)
+
+
+## Installing Owl
+
+Owl is available on `npm` and can be installed with the following command:
+
+```
+npm install @odoo/owl
+```
+
+If you want to use a simple `<script>` tag, the last release can be downloaded here:
+
+- [owl-1.0.11.js](https://github.com/odoo/owl/releases/download/v1.0.11/owl.js)
+- [owl-1.0.11.min.js](https://github.com/odoo/owl/releases/download/v1.0.11/owl.min.js)
 
 ## License
 
-OWL is [GPL licensed](./LICENSE).
+OWL is [LGPL licensed](./LICENSE).

doc/component.md

@@ -1,111 +0,0 @@
-# Component
-
-Components are the reusable, composable widgets. They are designed to be low
-level, to be declarative, and with asynchronous rendering.
-
-For example:
-
-```javascript
-export class Counter extends Component {
-  template = "counter";
-  state = { counter: 0 };
-
-  constructor(parent, props) {
-    super(parent, props);
-    this.state.counter = props.initialState || 0;
-  }
-
-  increment(delta) {
-    this.state.counter += delta;
-  }
-}
-```
-
-```xml
-    <div t-name="counter">
-      <button t-on-click="increment(-1)">-</button>
-      <span style="font-weight:bold">Value: <t t-esc="state.counter"/></span>
-      <button t-on-click="increment(1)">+</button>
-    </div>`;
-```
-
-## Lifecycle
-
-A solid and robust component system needs useful hooks/methods to help
-developers write components. Here is a description of the lifecycle of a owl
-component:
-
-- **[constructor](#constructor)**
-- **[willStart](#willStart)**
-- **[mounted](#mounted)**
-- **[willPatch](#willPatch)**
-- **[updated](#updated)**
-- **[willUnmount](#willUnmount)**
-
-Note: no hook method should ever be called manually. They are supposed to be
-called by the owl framework whenever it is required.
-
-### constructor
-
-The constructor is not exactly a hook, it is the constructor of the component.
-
-### willStart
-
-willStart is an asynchronous hook that can be implemented to perform some
-action before the initial rendering of a component.
-
-It will be called exactly once before the initial rendering. It is useful
-in some cases, for example, to load external assets (such as a JS library)
-before the widget is rendered. Another use case is to load data from a server.
-
-Note that a slow willStart method will slow down the rendering of the user
-interface. Therefore, some effort should be made to make this method as
-fast as possible.
-
-### mounted
-
-mounted is a hook that is called each time a component is attached to the
-DOM. This is a good place to add some listeners, or to interact with the
-DOM, if the component needs to perform some measure for example.
-
-It is the opposite of _willUnmount_. If a component has been mounted, it will
-be unmounted at some point.
-
-### willUpdateProps
-
-The willUpdateProps is an asynchronous hook, called just before new props
-are set. This is useful if the component needs some asynchronous task
-performed, depending on the props (for example, assuming that the props are
-some record Id, fetching the record data).
-
-This hook is not called during the first render (but willStart is called
-and performs a similar job).
-
-### willPatch
-
-The willPatch hook is called just before the DOM patching process starts.
-It is not called on the initial render. This is useful to get some
-information which are in the DOM. For example, the current position of the
-scrollbar
-
-### patched
-
-This hook is called whenever a component did actually update its props,
-state or env.
-
-This method is not called on the initial render. It is useful to interact
-with the DOM (for example, through an external library) whenever the
-component was patched.
-
-Updating the widget state in this hook is possible, but not encouraged.
-One need to be careful, because updates here will cause rerender, which in
-turn will cause other calls to patched. So, we need to be particularly
-careful at avoiding endless cycles.
-
-### willUnmount
-
-willUnmount is a hook that is called each time just before a component is unmounted from
-the DOM. This is a good place to remove some listeners, for example.
-
-This is the opposite method of _mounted_. The _willUnmount_ method will be
-called in reverse order: first the children, then the parents.

doc/learning/how_to_debug.md

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

doc/learning/how_to_test.md

@@ -0,0 +1,131 @@
+# 🦉 How to test Components 🦉
+
+## Content
+
+- [Overview](#overview)
+- [Unit Tests](#unit-tests)
+
+## Overview
+
+It is a good practice to test applications and components to ensure that they
+behave as expected. There are many ways to test a user interface: manual
+testing, integration testing, unit testing, ...
+
+In this section, we will discuss how to write unit tests for components.
+
+## Unit Tests
+
+Writing unit tests for Owl components really depends on the testing framework
+used in a project. But usually, it involves the following steps:
+
+- create a test file: for example `SomeComponent.test.js`,
+- in that file, import the code for `SomeComponent`,
+- add a test case:
+  - create a real DOM element to use as test fixture,
+  - create a test environment
+  - create an instance of `SomeComponent`, mount it to the fixture
+  - interact with the component and assert some properties.
+
+To help with this, it is useful to have a `helper.js` file that contains some
+common utility functions:
+
+```js
+export function makeTestFixture() {
+  let fixture = document.createElement("div");
+  document.body.appendChild(fixture);
+  return fixture;
+}
+
+export function nextTick() {
+  let requestAnimationFrame = owl.Component.scheduler.requestAnimationFrame;
+  return new Promise(function(resolve) {
+    setTimeout(() => requestAnimationFrame(() => resolve()));
+  });
+}
+
+export function makeTestEnv() {
+    // application specific. It needs a way to load actual templates
+    const templates = ...;
+
+    return {
+        qweb: new QWeb(templates),
+        ..., // each service can be mocked here
+    };
+}
+```
+
+With such a file, a typical test suite for Jest will look like this:
+
+```js
+// in SomeComponent.test.js
+import { SomeComponent } from "../../src/ui/SomeComponent";
+import { nextTick, makeTestFixture, makeTestEnv} from '../helpers';
+
+
+//------------------------------------------------------------------------------
+// Setup
+//------------------------------------------------------------------------------
+let fixture: HTMLElement;
+let env: Env;
+
+beforeEach(() => {
+  fixture = makeTestFixture();
+  env = makeTestEnv();
+  // we set here the default environment for each component created in the test
+  Component.env = env;
+});
+
+afterEach(() => {
+  fixture.remove();
+});
+
+//------------------------------------------------------------------------------
+// Tests
+//------------------------------------------------------------------------------
+describe("SomeComponent", () => {
+  test("component behaves as expected", async () => {
+    const props = {...}; // depends on the component
+    const comp = new SomeComponent(null, props);
+    await comp.mount(fixture);
+
+    // do some assertions
+    expect(...).toBe(...);
+
+    fixture.querySelector('button').click();
+    await nextTick();
+
+    // some other assertions
+    expect(...).toBe(...);
+  });
+});
+```
+
+Note that Owl does wait for the next animation frame to actually update the DOM.
+This is why it is necessary to wait with the `nextTick` (or other methods) to
+make sure that the DOM is up-to-date.
+
+It is sometimes useful to wait until Owl is completely done updating components
+(in particular, if we have a highly concurrent user interface). This next
+helper simply polls every 20ms the internal Owl task queue and returns a promise
+which resolves when it is empty:
+
+```js
+function afterUpdates() {
+  return new Promise((resolve, reject) => {
+    let timer = setTimeout(poll, 20);
+    let counter = 0;
+    function poll() {
+      counter++;
+      if (owl.Component.scheduler.tasks.length) {
+        if (counter > 10) {
+          reject(new Error("timeout"));
+        } else {
+          timer = setTimeout(poll);
+        }
+      } else {
+        resolve();
+      }
+    }
+  });
+}
+```

doc/learning/how_to_write_sfc.md

@@ -0,0 +1,52 @@
+# 🦉 How to write Single File Components 🦉
+
+It is very useful to group code by feature instead of by type of file. It makes
+it easier to scale application to larger size.
+
+To do so, Owl has two small helpers that make it easy to define a
+template or a stylesheet inside a javascript (or typescript) file: the
+[`xml`](../reference/tags.md#xml-tag) and [`css`](../reference/tags.md#css-tag)
+helper.
+
+This means that the template, the style and the javascript code can be defined in
+the same file. For example:
+
+```js
+const { Component } = owl;
+const { xml, css } = owl.tags;
+
+// -----------------------------------------------------------------------------
+// TEMPLATE
+// -----------------------------------------------------------------------------
+const TEMPLATE = xml/* xml */ `
+	<div class="main">
+		<Sidebar/>
+		<Content />
+	</div>`;
+
+// -----------------------------------------------------------------------------
+// STYLE
+// -----------------------------------------------------------------------------
+const STYLE = css/* css */ `
+  .main {
+    display: grid;
+    grid-template-columns: 200px auto;
+  }
+`;
+
+// -----------------------------------------------------------------------------
+// CODE
+// -----------------------------------------------------------------------------
+class Main extends Component {
+  static template = TEMPLATE;
+  static style = STYLE;
+  static components = { Sidebar, Content };
+
+  // rest of component...
+}
+```
+
+Note that the above example has an inline xml comment, just after the `xml` call.
+This is useful for some editor plugins, such as the VS Code addon
+`Comment tagged template`, which, if installed, add syntax highlighting to the
+content of the template string.

doc/learning/overview.md

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

doc/learning/quick_start.md

@@ -0,0 +1,411 @@
+# 🦉 How to start an Owl project 🦉
+
+## Content
+
+- [Overview](#overview)
+- [Simple html file](#simple-html-file)
+- [With a static server](#with-a-static-server)
+- [Standard Javascript project](#standard-javascript-project)
+
+## Overview
+
+Each software project has its specific needs. Many of these needs can be solved
+with some tooling: `webpack`, `gulp`, css preprocessor, bundlers, transpilers, ...
+
+Because of that, it is usually not simple to just start a project. Some
+frameworks provide their own tooling to help with that. But then, you have to
+integrate and learn how these applications work.
+
+Owl is designed to be used with no tooling at all. Because of that, Owl can
+"easily" be integrated in a modern build toolchain. In this section, we will
+discuss a few different setups to start a project. Each of these setups has
+advantages and disadvantages in different situations.
+
+## Simple html file
+
+The simplest possible setup is the following: a simple javascript file with your
+code. To do that, let us create the following file structure:
+
+```
+hello_owl/
+  index.html
+  owl.js
+  app.js
+```
+
+The file `owl.js` can be downloaded from the last release published at
+[https://github.com/odoo/owl/releases](https://github.com/odoo/owl/releases). It
+is a single javascript file which export all Owl into the global `owl` object.
+
+Now, `index.html` should contain the following:
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <title>Hello Owl</title>
+    <script src="owl.js"></script>
+    <script src="app.js"></script>
+  </head>
+  <body></body>
+</html>
+```
+
+And `app.js` should look like this:
+
+```js
+const { Component } = owl;
+const { xml } = owl.tags;
+const { whenReady } = owl.utils;
+
+// Owl Components
+class App extends Component {
+  static template = xml`<div>Hello Owl</div>`;
+}
+
+// Setup code
+function setup() {
+  const app = new App();
+  app.mount(document.body);
+}
+
+whenReady(setup);
+```
+
+Now, simply loading this html file in a browser should display a welcome message.
+This setup is not fancy, but it is extremely simple. There are no tooling at
+all required. It can be slightly optimized by using the minified build of Owl.
+
+## With a static server
+
+The previous setup has a big disadvantage: the application code is located in a
+single file. Obviously, we could split it in several files and add multiple
+`<script>` tags in the html page, but then we need to make sure the script are
+inserted in the proper order, we need to export each file content in global
+variables and we lose autocompletion across files.
+
+There is a low tech solution to this issue: using native javascript modules.
+This however has a requirement: for security reasons, browsers will not accept
+modules on content served through the `file` protocol. This means that we need
+to use a static server.
+
+Let us start a new project with the following file structure:
+
+```
+hello_owl/
+  src/
+    app.js
+    index.html
+    main.js
+    owl.js
+```
+
+As previously, the file `owl.js` can be downloaded from the last release published at
+[https://github.com/odoo/owl/releases](https://github.com/odoo/owl/releases).
+
+Now, `index.html` should contain the following:
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <title>Hello Owl</title>
+    <script src="owl.js"></script>
+    <script src="main.js" type="module"></script>
+  </head>
+  <body></body>
+</html>
+```
+
+Not that the `main.js` script tag has the `type="module"` attribute. This means
+that the browser will parse the script as a module, and load all its dependencies.
+
+Here is the content of `app.js` and `main.js`:
+
+```js
+// app.js ----------------------------------------------------------------------
+const { Component } = owl;
+const { xml } = owl.tags;
+
+export class App extends Component {
+  static template = xml`<div>Hello Owl</div>`;
+}
+
+// main.js ---------------------------------------------------------------------
+import { App } from "./app.js";
+
+function setup() {
+  const app = new App();
+  app.mount(document.body);
+}
+
+owl.utils.whenReady(setup);
+```
+
+The `main.js` file import the `app.js` file. Note that the import statement has
+a `.js` suffix, which is important. Most text editor can understand this syntax
+and will provide autocompletion.
+
+Now, to execute this code, we need to serve the `src` folder statically. A low
+tech way to do that is to use for example the python `SimpleHTTPServer` feature:
+
+```
+$ cd src
+$ python -m SimpleHTTPServer 8022    # now content is available at localhost:8022
+```
+
+Another more "javascripty" way to do it is to create a `npm` application. To do
+that, we can add the following `package.json` file at the root of the project:
+
+```json
+{
+  "name": "hello_owl",
+  "version": "0.1.0",
+  "description": "Starting Owl app",
+  "main": "src/index.html",
+  "scripts": {
+    "serve": "serve src"
+  },
+  "author": "John",
+  "license": "ISC",
+  "devDependencies": {
+    "serve": "^11.3.0"
+  }
+}
+```
+
+We can now install the `serve` tool with the command `npm install`, and then,
+start a static server with the simple `npm run serve` command.
+
+## Standard Javascript project
+
+The previous setup works, and is certainly good for some usecases, including
+quick prototyping. However, it lacks some useful features, such as livereload,
+a test suite, or bundling the code in a single file.
+
+Each of these features, and many others, can be done in many different ways.
+Since it is really not trivial to configure such a project, we provide here an
+example that can be used as a starting point.
+
+Our standard Owl project has the following file structure:
+
+```
+hello_owl/
+  public/
+    index.html
+  src/
+    components/
+      App.js
+    main.js
+  tests/
+    components/
+      App.test.js
+    helpers.js
+  .gitignore
+  package.json
+  webpack.config.js
+```
+
+This project as a `public` folder, meant to contain all static assets, such as
+images and styles. The `src` folder has the javascript source code, and finally,
+`tests` contains the test suite.
+
+Here is the content of `index.html`:
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <title>Hello Owl</title>
+  </head>
+  <body></body>
+</html>
+```
+
+Note that there are no `<script>` tag here. They will be injected by webpack.
+Now, let's have a look at the javascript files:
+
+```js
+// src/components/App.js -------------------------------------------------------
+import { Component, tags, useState } from "@odoo/owl";
+
+const { xml } = tags;
+
+export class App extends Component {
+  static template = xml`<div t-on-click="update">Hello <t t-esc="state.text"/></div>`;
+  state = useState({ text: "Owl" });
+  update() {
+    this.state.text = this.state.text === "Owl" ? "World" : "Owl";
+  }
+}
+
+// src/main.js -----------------------------------------------------------------
+import { utils } from "@odoo/owl";
+import { App } from "./components/App";
+
+function setup() {
+  const app = new App();
+  app.mount(document.body);
+}
+
+utils.whenReady(setup);
+
+// tests/components/App.test.js ------------------------------------------------
+import { App } from "../../src/components/App";
+import { makeTestFixture, nextTick, click } from "../helpers";
+
+let fixture;
+
+beforeEach(() => {
+  fixture = makeTestFixture();
+});
+
+afterEach(() => {
+  fixture.remove();
+});
+
+describe("App", () => {
+  test("Works as expected...", async () => {
+    const app = new App();
+    await app.mount(fixture);
+    expect(fixture.innerHTML).toBe("<div>Hello Owl</div>");
+
+    click(fixture, "div");
+    await nextTick();
+    expect(fixture.innerHTML).toBe("<div>Hello World</div>");
+  });
+});
+
+// tests/helpers.js ------------------------------------------------------------
+import { Component } from "@odoo/owl";
+import "regenerator-runtime/runtime";
+
+export async function nextTick() {
+  return new Promise(function (resolve) {
+    setTimeout(() => Component.scheduler.requestAnimationFrame(() => resolve()));
+  });
+}
+
+export function makeTestFixture() {
+  let fixture = document.createElement("div");
+  document.body.appendChild(fixture);
+  return fixture;
+}
+
+export function click(elem, selector) {
+  elem.querySelector(selector).dispatchEvent(new Event("click"));
+}
+```
+
+Finally, here is the configuration files `.gitignore`, `package.json` and
+`webpack.config.js`:
+
+```
+node_modules/
+package-lock.json
+dist/
+```
+
+```json
+{
+  "name": "hello_owl",
+  "version": "0.1.0",
+  "description": "Demo app",
+  "main": "src/index.html",
+  "scripts": {
+    "test": "jest",
+    "build": "webpack --mode production",
+    "dev": "webpack-dev-server --mode development"
+  },
+  "author": "Someone",
+  "license": "ISC",
+  "devDependencies": {
+    "@babel/core": "^7.8.4",
+    "@babel/plugin-proposal-class-properties": "^7.8.3",
+    "babel-jest": "^25.1.0",
+    "babel-loader": "^8.0.6",
+    "babel-plugin-transform-es2015-modules-commonjs": "^6.26.2",
+    "html-webpack-plugin": "^3.2.0",
+    "jest": "^25.1.0",
+    "regenerator-runtime": "^0.13.3",
+    "serve": "^11.3.0",
+    "webpack": "^4.41.5",
+    "webpack-cli": "^3.3.10",
+    "webpack-dev-server": "^3.10.2"
+  },
+  "dependencies": {
+    "@odoo/owl": "^1.0.4"
+  },
+  "babel": {
+    "plugins": ["@babel/plugin-proposal-class-properties"],
+    "env": {
+      "test": {
+        "plugins": ["transform-es2015-modules-commonjs"]
+      }
+    }
+  },
+  "jest": {
+    "verbose": false,
+    "testRegex": "(/tests/.*(test|spec))\\.js?$",
+    "moduleFileExtensions": ["js"],
+    "transform": {
+      "^.+\\.[t|j]sx?$": "babel-jest"
+    }
+  }
+}
+```
+
+```js
+const path = require("path");
+const HtmlWebpackPlugin = require("html-webpack-plugin");
+
+const host = process.env.HOST || "localhost";
+
+module.exports = function (env, argv) {
+  const mode = argv.mode || "development";
+  return {
+    mode: mode,
+    entry: "./src/main.js",
+    output: {
+      filename: "main.js",
+      path: path.resolve(__dirname, "dist"),
+    },
+    module: {
+      rules: [
+        {
+          test: /\.jsx?$/,
+          loader: "babel-loader",
+          exclude: /node_modules/,
+        },
+      ],
+    },
+    resolve: {
+      extensions: [".js", ".jsx"],
+    },
+    devServer: {
+      contentBase: path.resolve(__dirname, "public/index.html"),
+      compress: true,
+      hot: true,
+      host,
+      port: 3000,
+      publicPath: "/",
+    },
+    plugins: [
+      new HtmlWebpackPlugin({
+        inject: true,
+        template: path.resolve(__dirname, "public/index.html"),
+      }),
+    ],
+  };
+};
+```
+
+With this setup, we can now use the following script commands:
+
+```
+npm run build # build the full application in prod mode in dist/
+
+npm run dev # start a dev server with livereload
+
+npm run test # run the jest test suite
+```

doc/miscellaneous/comparison.md

@@ -0,0 +1,345 @@
+# Comparison with Vue/React
+
+OWL, React and Vue have the same main feature: they allow developers to build
+declarative user interfaces. To do that, all these frameworks uses a virtual dom. However, there are still obviously many differences.
+
+In this page, we try to highlight some of these differences. Obviously, a lot of
+effort was done to be fair. However, if you disagree with some of the points
+discussed, feel free to open an issue/submit a PR to correct this text.
+
+## Content
+
+- [Size](#size)
+- [Class Based](#class-based)
+- [Tooling/Build Step](#toolingbuild-step)
+- [Templating](#templating)
+- [Asynchronous rendering](#asynchronous-rendering)
+- [Reactiveness](#reactiveness)
+- [State Management](#state-management)
+- [Hooks](#hooks)
+
+## Size
+
+OWL is intended to be small and to work at a slightly lower level of abstraction
+than React and Vue. Also, jQuery is not the same kind of framework, but it is interesting to compare.
+
+| Framework                | Size (minified, gzipped) |
+| ------------------------ | ------------------------ |
+| OWL                      | 18kb                     |
+| Vue + VueX               | 30kb                     |
+| Vue + VueX + Vue Router  | 39kb                     |
+| React + ReactDOM + Redux | 40kb                     |
+| jQuery                   | 30kb                     |
+
+Note that those comparisons are not entirely fair, because we do not compare
+the same exact set of features. For example, VueX and Vue Router support more
+advanced use cases.
+
+## Class Based
+
+Both React and Vue moved away from defining components with classes. They prefer
+a more functional approach, in particular, with the new `hooks` mechanisms.
+
+This has some advantages and disadvantages. But the end result is that React
+and Vue both offers multiple different ways of defining new components. In
+contrast, Owl has only one mechanism: class-based components. We believe that Owl
+components are fast enough for all our usecases, and making it as simple as
+possible for developers is more valuable (for us).
+
+Also, functions or class based components are more than just syntax. Functions
+comes with a mindset of composition and class are about inheritance. Clearly,
+both of these are important mechanisms for reusing code. Also, one does not
+exclude the other.
+
+It certainly looks like the world of UI frameworks is moving toward composition,
+for many very good reasons. Owl is still good at composition (for example,
+Owl supports slots, which is the primary mechanism to make generic reusable
+components). But it can also use inheritance (and this is very important since
+templates can also be inherited with `xpaths` transformations).
+
+## Tooling/Build step
+
+OWL is designed to be easy to use in a standalone way. For various reasons,
+Odoo does not want to rely on standard web tools (such as webpack), and OWL can
+be used by simply adding a script tag to a page.
+
+```html
+<script src="owl.min.js" />
+```
+
+In comparison, React encourages using JSX, which necessitate a build step, and
+most Vue applications uses single file components, which also necessitate a build step.
+
+On the flipside, external tooling may make it harder to use in some case, but it
+also brings a lot of benefits. And React/Vue have both a large ecosystem.
+
+Note that since Owl is not dependant on any external tool nor libraries, it is
+very easy to integrate into any build toolchain. Also, since we cannot rely on
+additional tools, we made a lot of effort to make the most of the web platform.
+
+For example, Owl uses the standard `xml` parser that comes with every browser.
+Because of that, Owl did not have to write its own template parser. Another
+example is the [`xml`](../reference/tags.md#xml-tag) tag helper function, which makes use of
+native template literals to allow in a natural way to write `xml` templates
+directly in the javascript code. This can be easily integrated with editor
+plugins to have autocompletion inside the template.
+
+## Templating
+
+OWL uses its own QWeb engine, which compiles templates on the
+frontend, as they are needed. This is extremely convenient for our use case, in
+particular because templates are described in XML files, and can be modified by
+XPaths. Since Odoo is at its heart a modular application, this is an important
+feature for us.
+
+```xml
+<div>
+  <button t-on-click="increment">Click Me! [<t t-esc="state.value"/>]</button>
+</div>
+```
+
+Vue is actually kind of similar. Its template language is kind of close to QWeb,
+with the `v` replaced by the `t`. However, it is also more fully featured. For
+example, Vue templates have slots, or event modifiers. A large difference is that
+most Vue applications will need to be built ahead of time, to compile the templates
+into javascript functions. Note that Vue has a separate build which includes the
+template compiler.
+
+In contrast, most React applications do not use a templating language, but write
+some JSX code, which is precompiled into plain JavaScript by a build step. This
+example is done with the (kind of outdated) React class system:
+
+```jsx
+class Clock extends React.Component {
+  render() {
+    return (
+      <div>
+        <h1>Hello, world!</h1>
+        <h2>It is {this.props.date.toLocaleTimeString()}.</h2>
+      </div>
+    );
+  }
+}
+```
+
+This has the advantage of having the full power of Javascript, but is less
+structured than a template language. Note that the tooling is quite impressive:
+there is a syntax highlighter for jsx here on github!
+
+By comparison, here is the equivalent Owl component, written with the
+[`xml`](../reference/tags.md#xml-tag) tag helper:
+
+```js
+class Clock extends Component {
+  static template = xml`
+      <div>
+        <h1>Hello, world!</h1>
+        <h2>It is {props.date.toLocaleTimeString()}.</h2>
+      </div>
+    `;
+}
+```
+
+## Asynchronous Rendering
+
+This is actually a big difference between OWL and React/Vue: components in OWL
+are totally asynchronous. They have two asynchronous hooks in their lifecycle:
+
+- `willStart` (before the component starts rendering)
+- `willUpdateProps` (before new props are set)
+
+Both these methods can be implemented and return a promise. The rendering will
+then wait for these promises to be completed before patching the DOM. This is
+useful for some use cases: for example, a component may want to fetch an external
+library (a calendar component may need a specialized calendar rendering library),
+in its willStart hook.
+
+```javascript
+class MyCalendarComponent extends owl.Component {
+    ...
+
+    willStart() {
+        return utils.lazyLoad('static/libs/fullcalendar/fullcalendar.js');
+    }
+    ...
+}
+```
+
+This may be dangerous (to stop the rendering waiting for the network), but it is
+extremely powerful as well, as demonstrated by the Odoo Web Client.
+
+Lazy loading static libraries can obviously be done with React/Vue, but it is
+more convoluted. For example, in Vue, you need to use a dynamic import keyword
+that needs to be transpiled at build time in order for the component to be loaded
+asynchronously (see [the documentation](https://vuejs.org/v2/guide/components-dynamic-async.html#Async-Components)).
+
+## Reactiveness
+
+React has a simple model: whenever the state changes, it is
+replaced with a new state (via the `setState` method). Then, the DOM is patched.
+This is simple, efficient, and a little bit awkward to write.
+
+Vue is a little bit different: it replace magically the properties in the state
+by getters/setters. With that, it can notify components whenever the state that
+they read was changed.
+
+Owl is closer to vue: it also tracks magically the state properties, but it does
+only increment an internal counter whenever it changes. Note that it is done
+with a `Proxy`, which means that it is totally transparent to the developers.
+Adding new keys is supported. Once any part of the state has been changed, a
+rendering is scheduled in the next microtask tick (promise queue).
+
+## State Management
+
+Managing the state of an application is a tricky issue. Many solutions have
+been proposed these last few years. It also depends on the kind of application we
+are talking about. A small application may not need much more than a simple
+object to contain its state.
+
+However, there are some common solutions for React and Vue: redux and vuex.
+Both of them are a centralized store that own the state, and they dictate how
+the state can be mutated.
+
+**Redux**
+
+In Redux, the state is mutated by reducers. Reducers are functions
+that modify the state by returning a different object:
+
+```javascript
+  ...
+  switch (action.type) {
+    case ADD_TODO: {
+      const { id, content } = action.payload;
+      return {
+        ...state,
+        allIds: [...state.allIds, id],
+        byIds: {
+          ...state.byIds,
+          [id]: {
+            content,
+            completed: false
+          }
+        }
+      };
+    }
+```
+
+This is a little bit awkward to write, but this allows the component system to
+check if a part of the state was changed. This is exactly what is done by the
+`connect` function: it create a _connected_ component, which is subscribed to
+the state and triggers a rerender if some part of the state was modified.
+
+**VueX**
+
+VueX is based on a different principle: the state is mutated through
+some special functions (the mutations), which modify the state in place:
+
+```javascript
+    function ({state}, payload) {
+        const { id, content } = payload;
+        const message = {id, content, completed: false};
+        state.messages.push(message)
+    }
+```
+
+This is simpler, but there is a little bit more happening behind the scene:
+each key from the state is silently replaced by getters and setters, and VueX
+keeps track of who get data, and retrigger a render when it was changed.
+
+**Owl**
+
+Owl store is a little bit like a mix of redux and vuex: it has actions (but not
+mutations), and like VueX, it keeps track of the state changes. However, it does
+not notify a component when the state changes. Instead, components need to connect
+to the store like in redux, with the `useStore` hook (see the [store documentation](../reference/store.md#connecting-a-component)).
+
+```javascript
+const actions = {
+  increment({ state }, val) {
+    state.counter.value += val;
+  },
+};
+
+const state = {
+  counter: { value: 0 },
+};
+const store = new owl.Store({ state, actions });
+
+class Counter extends Component {
+  static template = xml`
+      <button t-name="Counter" t-on-click="dispatch('increment')">
+        Click Me! [<t t-esc="counter.value"/>]
+      </button>`;
+  counter = useStore((state) => state.counter);
+  dispatch = useDispatch();
+}
+
+Counter.env.store = store;
+const counter = new Counter();
+```
+
+## Hooks
+
+[Hooks](https://reactjs.org/docs/hooks-intro.html#motivation) recently took over
+the React world. They solve a lot of seemingly unconnected problems: attach
+reusable behavior to a component, in a composable way, extract stateful logic
+from a component or reuse stateful logic between component, without changing your
+component hierarchy.
+
+Here is an example of the React `useState` hook:
+
+```js
+import React, { useState } from "react";
+
+function Example() {
+  // Declare a new state variable, which we'll call "count"
+  const [count, setCount] = useState(0);
+
+  return (
+    <div>
+      <p>You clicked {count} times</p>
+      <button onClick={() => setCount(count + 1)}>Click me</button>
+    </div>
+  );
+}
+```
+
+Because of the way React designed the hooks API, they only work for functional
+components. But in that case, they really are powerful. Every major React library
+is in the process of redesigning their API with hooks (for example,
+[Redux](https://react-redux.js.org/next/api/hooks)).
+
+Vue 2 does not have hooks, but the Vue project is working on its next version,
+which will feature its new [composition API](https://vue-composition-api-rfc.netlify.com/).
+This work is based on the new ideas introduced by React hooks.
+
+From the way React and Vue introduce their hooks, it may look like hooks are not
+compatible with class components. However, this is not the case, as shown by
+Owl [hooks](../reference/hooks.md). They are inspired by both React and Vue. For example,
+the `useState` hook is named after React, but its API is closer to the `reactive`
+Vue hook.
+
+Here is what the `Counter` example above look like in Owl:
+
+```js
+import { Component, Owl } from "owl";
+import { xml } from "owl/tags";
+
+class Example extends Component {
+  static template = xml`
+      <div>
+        <p>You clicked {count.value} times</p>
+        <button t-on-click="increment">Click me</button>
+      </div>`;
+
+  count = useState({ value: 0 });
+
+  increment() {
+    this.state.value++;
+  }
+}
+```
+
+Since the Owl framework had hooks from early in its life, its main APIs
+are designed to be interacted with hooks from the start. For example, the
+`Context` and `Store` abstractions.

doc/miscellaneous/rendering.md

@@ -0,0 +1,32 @@
+# 🦉 Rendering Pipeline 🦉
+
+We explain here how Owl is designed, from the perspective of its rendering
+pipeline.
+
+Warning: these notes are technical by nature, and intended for people working
+on Owl (or interested in understanding its design).
+
+## Overview
+
+A rendering occurs in two phases:
+
+- virtual rendering: this generates the virtual dom in memory, asynchronously
+- patch: applies a virtual tree to the screen (synchronously)
+
+There are several classes involved in a rendering:
+
+- components
+- a scheduler
+- fibers: small objects containing some metadata, associated with a rendering of
+  a specific component
+
+Components are organized in a dynamic component tree, visible in the user
+interface. Whenever a rendering is initiated in a component `C`:
+
+- a fiber is created on `C` with the rendering props information
+- the virtual rendering phase starts on C (will asynchronously render all the
+  child components)
+- the fiber is added to the scheduler, which will poll continuously, every
+  animation frame, if the fiber is done
+- once it is done, the scheduler will call the task callback, which will apply
+  the patch (if it was not cancelled in the meantime).

doc/miscellaneous/vdom.md

@@ -0,0 +1,18 @@
+# 🦉 VDom 🦉
+
+Owl is a declarative component system: we declare the structure of the component
+tree, and Owl will translate that to a list of imperative operations. This
+translation is done by a virtual dom. This is the low level layer of Owl, most
+developer will not need to call directly the virtual dom functions.
+
+The main idea behind a virtual dom is to keep a in-memory representation of the
+DOM (called a virtual node), and whenever some change is needed, to regenerate
+a new representation, compute the difference between the old and the new, then
+apply the changes.
+
+`vdom` exports two functions:
+
+- `h`: create a new virtual node
+- `patch`: compare two virtual nodes, and apply the difference.
+
+Note: Owl's virtual dom is a fork of [snabbdom](https://github.com/snabbdom/snabbdom).

doc/miscellaneous/why_owl.md

@@ -0,0 +1,180 @@
+# 🦉 Why Owl ? 🦉
+
+The common wisdom is that one should not reinvent the wheel, because that would
+waste effort and resources. It is certainly true in many cases. A javascript
+framework is a considerable investment, so it is quite logical to ask the question:
+why did Odoo decide to make OWL instead of using a standard/well known framework,
+such as React or Vue?
+
+As you might expect, the answer to that question is not simple. But most of the
+reasons discussed in this page are a consequence from a single fact: Odoo is
+extremely modular.
+
+This means, for example, that the core parts of Odoo are not aware, before runtime,
+of what files will be loaded/executed, or what will be the state of the UI. Because
+of that, Odoo cannot rely on a standard build toolchain. Also, this implies that
+the core parts of Odoo need to be extremely generic. In other words, Odoo is not
+really an application with a user interface. It is an application which generates
+a dynamic user interface. And most frameworks are not up to the task.
+
+Betting on Owl was not an easy choice to make, because there certainly are a lot
+of conflicting needs that we want to carefully balance. Choosing anything other
+than a well known framework is bound to be controversial. This page will explain
+some of the reason why we still believe that building Owl is a worthwile
+endeavour.
+
+## Strategy
+
+It is true that we want to keep control of our technology, in the sense that we
+do not want to depend on Facebook or Google, or any other large (or small)
+company. If they decide to change their license, or to go in a direction that
+will not work for us, this may be a problem. This is even more true because
+Odoo is not a conventional javascript application, and our needs are probably
+quite different as most other applications.
+
+## Class components
+
+It is clear that the biggest frameworks are moving away from class components.
+There is an implicit assumption that class components are terrible, and that
+functional programming is the way to go. React even goes as far as to say that
+classes are confusing for developers.
+
+While there is some truth to that, and to the fact that composition is certainly
+a good mechanism for code reuse, we believe that classes and inheritance are
+important tools.
+
+Sharing code between generic components with inheritance is the way Odoo built
+its web client. And it is clear that inheritance is not the root of all evils.
+It is often a perfectly simple and appropriate solution. What matter most is
+the architectural decisions.
+
+Also, Odoo has another specific use out of class components: each method of a
+class provides an extension point for addons. This may not be a clean architecture
+pattern, but it is a pragmatic decision that served Odoo well: classes are
+sometimes monkey-patched to add behaviour from the outside. A little bit like
+mixins, but from the outside.
+
+Using React or Vue would make it significantly harder to monkey patch components,
+because a lot of the state is hidden in their internals.
+
+## Tooling
+
+React or Vue have a huge community, and a lot of effort have been made into their
+tooling. This is wonderful, but at the same time, a pretty big issue for Odoo:
+since the assets are totally dynamic (and could change whenever the user install
+or remove an addon), we need to have all that kind of tooling on the production
+servers. This is certainly not ideal.
+
+Also, this makes it very complicated to setup Vue or React tools: Odoo code is
+not a simple file that import other files. It changes all the time, assets
+are bundled differently in different contexts. This is the reason why Odoo has
+its own module system, which are resolve at runtime, by the browser. The
+dynamic nature of Odoo means that we often need to delay work as late as possible
+(in other word, we want a JIT user interface!)
+
+Our ideal framework has minimal (mandatory) tooling, which makes it easier to
+deploy. Using React without JSX, or Vue without vue file is not very appealing.
+
+At the same time, Owl is designed to solve this issue: it compiles templates
+by the browser, it doesn't need much code for that, since we use the XML parser
+built into each browser. Owl works with or without any additional tooling. It
+can use template strings to write single file component, and is easy to integrate
+in any html page, with a simple `<script>` tag.
+
+## Template based
+
+Odoo stores template as XML document in a database. This is very powerful, since
+this allow the use of xpaths to customize other templates. This is a very
+important feature of odoo, and one of the key to Odoo modularity.
+
+Because of that, we still expect to write our templates in an XML document.
+Weirdly enough, no major framework uses XML to store templates, even though it
+is extremely convenient.
+
+So, using React or Vue means that we need to make a template compiler. For React,
+that would be a compiler that would take a QWeb template, and convert it to a
+React render function. For Vue, it would convert it to a Vue template. Then
+we need to bundle the vue template compiler as well.
+
+Not only this would be complex (compiling a templating language into another is
+not an easy task), but it would negatively impact the developer experience as
+well. Writing Vue or React components in a QWeb template would certainly be
+awkward, and very confusing.
+
+## Developer Experience
+
+This brings us to the following point: developer experience. We see this choice
+as an investment for the future, and we want to make onboarding developer as
+easy as possible.
+
+While many javascript professionals clearly think that react/vue is not difficult
+(which is true to some extent), it is alsy true that many non js specialists are
+overwhelmed with the frontend world: functional component, hooks, and many other
+fancy words. Also, what is available in the compilation context may be difficult,
+there is a lot of black magic going on in pretty much every framework. Vue
+somehow join various namespaces into one, under the hood, and add various internal
+keys. Svelte transform the code. React require that state transformations are
+deep, and not shallow.
+
+Owl is trying very hard to have a simple and familiar API. It uses classes. Its
+reactivity system is explicit, not implicit. The scoping rules are obvious. In
+case of doubt, we err on the side of not implementing a feature.
+
+It is certainly different from React or Vue, but at the same time, kind of
+familiar for experienced developers.
+
+## JIT compilation
+
+There is also a clear trend in the frontend world to compile code
+as much as possible ahead of time. Most frameworks will compile templates ahead
+of time. And now Svelte is trying to compile the JS code away, so it can remove
+itself from the bundle.
+
+This is certainly reasonable for many usecases. However, this is not what Odoo
+needs: Odoo will fetch templates from the database and need to compile them only
+at the last possible moment, so we can apply all necessary xpaths.
+
+Even more: Odoo needs to be able to generate (and compile) templates at runtime.
+Currently, Odoo form views interpret a xml description. But the form view code
+then needs to do a lot of complicated operations. With Owl, we will be able to
+transform a view description into a QWeb template, then compile that and use it
+immediately.
+
+## Reactivity
+
+There are other design choices that we feel are not optimal in other frameworks.
+For example, the reactivity system. We like the way Vue did it, but it has a
+flaw: it is not really optional. There is actually a way to opt out of the reactivity
+system by freezing the state, but then, it is freezed.
+
+And there certainly are situations where we need a state, which is not readonly,
+and not observed. For example, imagine a spreadsheet component. It may have a
+very large internal state, and it knows exactly when it needs to be rendered
+(basically, whenever the user perform some action). Then, observing its state
+is a net performance loss, both for the CPU and the memory.
+
+## Concurrency
+
+Many applications are happy to simply display a spinner whenever a new asynchronous
+action is performed, but Odoo want a different user experience: most asynchronous
+state changes are not displayed until ready. This is sometimes called a concurrent
+mode: the UI is rendered in memory, and displayed only when it is ready (and
+only if it has not been cancelled by subsequent user actions).
+
+React has now an experimental concurrent mode, but it was not ready when Owl
+started. Vue has not really an equivalent API (suspense is not what we need).
+
+Also, React concurrent mode is complex to use. Concurrency was one of the rare
+strong point of the former Odoo js framework (widgets), and we feel that Owl has
+now a very strong concurrent mode, which is simple and powerful at the same time.
+
+## Conclusion
+
+This lengthy discussion showed that there are many small and not so small reasons
+that current standard frameworks are not tailored to our needs. It is perfectly
+fine, because they each chose a different set of tradeoffs.
+
+However, we feel that there is still room in the framework world for something
+that is different. For a framework that make choices compatible with Odoo.
+
+And that is why we built Owl 🦉.

doc/quick_start.md

@@ -1,61 +0,0 @@
-# Quick Start
-
-To build an application (or a sub-part of an application), we need two things:
-
-- an environment
-- a root widget
-
-Here are a few steps that may be useful to get started:
-
-- get the templates
-- create a qweb engine, with the templates
-- create an environment
-- create an instance of the root widget
-- mount the root widget to a DOM element
-
-## Simple example
-
-In a oversimplified example, here is what it could look like:
-
-```javascript
-const templates = await loadTemplates();
-
-const qweb = new QWeb();
-qweb.loadTemplates(templates);
-
-const env = {
-  qweb: qweb
-};
-
-const root = new RootWidget(env, { initialState: 17 });
-
-const target = document.getElementById("app");
-root.mount(target);
-```
-
-## Managing state
-
-The environment is propagated to each subchildren. So, it is convenient to use
-to give a reference to some global object. This is potentially very useful
-in a redux-like architecture:
-
-```javascript
-...
-
-const store = new Store();
-
-const env = {
-    qweb: qweb,
-    store: store,
-};
-
-const state = store.getState()
-const root = new RootWidget(env, state);
-
-store.on('state_change', nextState => {
-    root.updateProps(nextState);
-});
-
-const target = document.getElementById('app');
-root.mount(target);
-```

doc/qweb.md

@@ -1,35 +0,0 @@
-# QWeb
-
-QWeb is a template specification. The QWeb class in this repository is:
-
-- an implementation of the QWeb specification
-- which outputs a virtual dom instead of a string
-- and extended with a few extra directives
-
-## QWeb Specification
-
-add here a full description of what QWeb is supposed to be, with some examples
-
-## QWeb Implementation
-
-```javascript
-var qweb = new QWeb();
-qweb.addTemplate("sometemplate", '<div>hello <t t-esc="name"/></div>');
-
-// result is a vnode which represent <div>hello world</div>
-result = qweb.render("sometemplate", { name: "world" });
-```
-
-## QWeb extensions
-
-- t-on directive
-- t-widget, t-props, t-key
-- t-ref
-
-## Note on white spaces
-
-White spaces in a templates are handled in a special way:
-
-- consecutive whitespaces are always condensed to a single whitespace
-- if a whitespace-only text node contains a linebreak, it is ignored
-- the previous rules do not apply if we are in a `<pre>` tag

doc/readme.md

@@ -1,17 +1,55 @@
-# Odoo Web Lab Documentation
+# 🦉 OWL Documentation 🦉
 
-Currently, this repository contains:
+## Learning Owl
 
-- an implementation/extension of the QWeb template engine that outputs a virtual
-  dom (using the snabbdom library)
-- a Component class, which uses the QWeb engine as its underlying rendering
-  mechanism. The component class is designed to be declarative, with
-  asynchronous rendering. Also, it uses snabbdom as the virtual dom library.
-- some utility functions/classes
-- a Store class and a connect function, to help manage the state of an application (like react-redux)
+Are you new to Owl? This is the place to start!
 
-- [Quick Start](quick_start.md)
-- [Tutorial](tutorial.md)
-- [Component](component.md)
-- [QWeb](qweb.md)
-- [State Management](state_management.md)
+- [Tutorial: create a TodoList application](learning/tutorial_todoapp.md)
+- [Quick Overview](learning/overview.md)
+- [How to start an Owl project](learning/quick_start.md)
+- [How to test Components](learning/how_to_test.md)
+- [How to write Single File Components](learning/how_to_write_sfc.md)
+- [How to write debug Owl applications](learning/how_to_debug.md)
+
+## Reference
+
+You will find here a complete reference of every feature, class or object
+provided by Owl.
+
+- [Animations](reference/animations.md)
+- [Component](reference/component.md)
+- [Content](reference/content.md)
+- [Concurrency Model](reference/concurrency_model.md)
+- [Configuration](reference/config.md)
+- [Context](reference/context.md)
+- [Environment](reference/environment.md)
+- [Event Bus](reference/event_bus.md)
+- [Event Handling](reference/event_handling.md)
+- [Error Handling](reference/error_handling.md)
+- [Hooks](reference/hooks.md)
+- [Miscellaneous Components](reference/misc.md)
+- [Observer](reference/observer.md)
+- [Props](reference/props.md)
+- [Props Validation](reference/props_validation.md)
+- [QWeb Templating Language](reference/qweb_templating_language.md)
+- [QWeb Engine](reference/qweb_engine.md)
+- [Router](reference/router.md)
+- [Store](reference/store.md)
+- [Slots](reference/slots.md)
+- [Tags](reference/tags.md)
+- [Utils](reference/utils.md)
+
+## Other Topics
+
+This section provides miscellaneous document that explains some topics
+which cannot be considered either a tutorial, or reference documentation.
+
+- [Owl architecture: the Virtual DOM](miscellaneous/vdom.md)
+- [Owl architecture: the rendering pipeline](miscellaneous/rendering.md)
+- [Comparison with React/Vue](miscellaneous/comparison.md)
+- [Why did Odoo built Owl?](miscellaneous/why_owl.md)
+
+---
+
+Found an issue in the documentation? A broken link? Some outdated information?
+Please open an issue or submit a PR!

doc/reference/animations.md

@@ -0,0 +1,95 @@
+# 🦉 Animations 🦉
+
+Animation is a complex topic. There are many different use cases, and many
+solutions and technologies. Owl only supports some basic use cases.
+
+## Simple CSS effects
+
+Sometimes, using pure CSS is enough. For these use cases, Owl is not really
+necessary: it just needs to render a DOM element with a specific class. For
+example:
+
+```xml
+<a class="btn flash" t-on-click="doSomething">Click</a>
+```
+
+with the following CSS:
+
+```css
+btn {
+  background-color: gray;
+}
+
+.flash {
+  transition: background 0.5s;
+}
+
+.flash:active {
+  background-color: #41454a;
+  transition: background 0s;
+}
+```
+
+will produce a nice flash effect whenever the user clicks (or activates with the
+keyboard) the button.
+
+## CSS Transitions
+
+A more complex situation occurs when we want to transition an element in or out
+of the page. For example, we may want a fade-in and fade-out effect.
+
+The `t-transition` directive is here to help us. It works on html elements and
+on components, by adding and removing some css classes.
+
+To perform useful transition effects, whenever an element appears or disappears,
+it is necessary to add/remove some css style or class at some precise moment in
+the lifetime of a node. Since this is not easy to do by hand, Owl `t-transition`
+directive is there to help.
+
+Whenever a node has a `t-transition` directive, with a `name` value, the following
+sequence of events will happen:
+
+At node insertion:
+
+- the css classes `name-enter` and `name-enter-active` will be added directly
+  when the node is inserted into the DOM,
+- on the next animation frame: the css class `name-enter` will be removed and the
+  class `name-enter-to` will be added (so they can be used to trigger css
+  transition effects),
+- the css class `name-enter-active` will be removed whenever a css transition
+  ends.
+
+At node destruction:
+
+- the css classes `name-leave` and `name-leave-active` will be added before the
+  node is removed to the DOM,
+- the css class `name-leave` will be removed on the next animation frame (so it
+  can be used to trigger css transition effects),
+- the css class `name-leave-active` will be removed whenever a css transition
+  ends. Only then will the element be removed from the DOM.
+
+For example, a simple fade in/out effect can be done with this:
+
+```xml
+<div>
+    <div t-if="state.flag" class="square" t-transition="fade">Hello</div>
+</div>
+```
+
+```css
+.fade-enter-active,
+.fade-leave-active {
+  transition: opacity 0.5s;
+}
+.fade-enter,
+.fade-leave-to {
+  opacity: 0;
+}
+```
+
+The `t-transition` directive can be applied on a node element or on a component.
+
+Notes:
+
+Owl does not support more than one transition on a single node, so the
+`t-transition` expression must be a single value (i.e. no space allowed).

doc/reference/component.md

@@ -0,0 +1,820 @@
+# 🦉 OWL Component 🦉
+
+## Content
+
+- [Overview](#overview)
+- [Example](#example)
+- [Reference](#reference)
+  - [Reactive System](#reactive-system)
+  - [Properties](#properties)
+  - [Static Properties](#static-properties)
+  - [Methods](#methods)
+  - [Lifecycle](#lifecycle)
+  - [Root Component](#root-component)
+  - [Composition](#composition)
+  - [Form Input Bindings](#form-input-bindings)
+  - [References](#references)
+  - [Dynamic sub components](#dynamic-sub-components)
+  - [Functional Components](#functional-components)
+  - [SVG components](#svg-components)
+
+## Overview
+
+OWL components are the building blocks for user interface. They are designed to be:
+
+1. **declarative:** the user interface should be described in terms of the state
+   of the application, not as a sequence of imperative steps.
+
+2. **composable:** each component can seamlessly be created in a parent component by
+   a simple tag or directive in its template.
+
+3. **asynchronous rendering:** the framework will transparently wait for each
+   sub components to be ready before applying the rendering. It uses native promises
+   under the hood.
+
+4. **uses QWeb as a template system:** the templates are described in XML
+   and follow the QWeb specification. This is a requirement for Odoo.
+
+OWL components are defined as a subclass of Component. The rendering is
+exclusively done by a [QWeb](qweb_templating_language.md) template (which needs to be preloaded in QWeb).
+Rendering a component generates a virtual dom representation
+of the component, which is then patched to the DOM, in order to apply the changes in an efficient way.
+
+## Example
+
+Let us have a look at a simple component:
+
+```javascript
+const { useState } = owl.hooks;
+
+class ClickCounter extends owl.Component {
+  state = useState({ value: 0 });
+
+  increment() {
+    this.state.value++;
+  }
+}
+```
+
+```xml
+<button t-name="ClickCounter" t-on-click="increment">
+  Click Me! [<t t-esc="state.value"/>]
+</button>
+```
+
+Note that this code is written in ESNext style, so it will only run on the
+latest browsers without a transpilation step.
+
+This example shows how a component should be defined: it simply subclasses the
+Component class. If no static `template` key is defined, then
+Owl will use the component's name as template name. Here,
+a state object is defined, by using the `useState` hook. It is not mandatory to use the state object, but it is certainly encouraged. The result of the `useState` call is
+[observed](observer.md), and any change to it will cause a rerendering.
+
+## Reference
+
+An Owl component is a small class which represents a component or some UI element.
+It exists in the context of an [environment](environment.md) (`env`), which is propagated from a
+parent to its children. The environment needs to have a [QWeb](qweb_templating_language.md) instance, which
+will be used to render the component template.
+
+Be aware that the name of the component may be significant: if a component does
+not define a `template` key, then Owl will lookup in QWeb to
+find a template with the component name (or one of its ancestors).
+
+### Reactive system
+
+OWL components are normal javascript classes. So, changing a component internal
+state does nothing more:
+
+```js
+class Counter extends Component {
+  static template = xml`<div t-on-click="increment"><t t-esc="state.value"/></div>`;
+  state = { value: 0 };
+
+  increment() {
+    this.state.value++;
+  }
+}
+```
+
+Clicking on the `Counter` component defined above will call the `increment`
+method, but it will not rerender the component. To fix that, one could add an
+explicit call to `render` in `increment`:
+
+```js
+    increment() {
+        this.state.value++;
+        this.render();
+    }
+```
+
+However, it may be simple in this case, but it quickly become cumbersome, as a
+component get more complex, and its internal state is modified by more than one
+method.
+
+A better way is to use the reactive system: by using the `useState` hook (see the
+[hooks](hooks.md) section for more details), one can make Owl react to state
+changes. The `useState` hook generates a proxy version of an object
+(this is done by an [observer](observer.md)), which allows the component to
+react to any change. So, the `Counter` example above can be improved like this:
+
+```js
+const { useState } = owl.hooks;
+
+class Counter extends Component {
+  static template = xml`<div t-on-click="increment"><t t-esc="state.value"/></div>`;
+  state = useState({ value: 0 });
+
+  increment() {
+    this.state.value++;
+  }
+}
+```
+
+Obviously, we can call the `useState` hook more than once:
+
+```js
+const { useState } = owl.hooks;
+
+class Counter extends Component {
+  static template = xml`
+      <div>
+        <span t-on-click="increment(counter1)"><t t-esc="counter1.value"/></span>
+        <span t-on-click="increment(counter2)"><t t-esc="counter2.value"/></span>
+      </div>`;
+  counter1 = useState({ value: 0 });
+  counter2 = useState({ value: 0 });
+
+  increment(counter) {
+    counter.value++;
+  }
+}
+```
+
+Note that hooks are subject to one important [rule](hooks.md#one-rule): they need
+to be called in the constructor.
+
+### Properties
+
+- **`el`** (HTMLElement | null): reference to the DOM root node of the element. It is `null` when the
+  component is not mounted.
+
+- **`env`** (Object): the component [environment](environment.md), which contains a QWeb instance.
+
+- **`props`** (Object): this is an object containing all the properties given by
+  the parent to a child component. For example, in the following situation,
+  the parent component gives a `user` and a `color` value to the `ChildComponent`.
+
+  ```xml
+    <div>
+      <ChildComponent user="state.user" color="color">
+    </div>
+  ```
+
+  Note that `props` are owned by the parent, not by the component.
+  As such, it should not ever be modified by the component (otherwise you risk
+  unintended effects, since the parent may not be aware of the change)!!
+
+  The `props` can be modified dynamically by the parent. In that case, the
+  component will go through the following lifecycle methods: `willUpdateProps`,
+  `willPatch` and `patched`.
+
+### Static Properties
+
+- **`template`** (string, optional): if given, this is the name of the QWeb template that will render the component. Note that there is a helper `xml` to
+  make it easy to define an inline template.
+
+* **`components`** (Object, optional): if given, this is an object that contains
+  the classes of any sub components needed by the template. This is the main way
+  used by Owl to be able to create sub components.
+
+  ```js
+  class ParentComponent extends owl.Component {
+    static components = { SubComponent };
+  }
+  ```
+
+* **`props`** (Object, optional): if given, this is an object that describes the
+  type and shape of the (actual) props given to the component. If Owl mode is
+  `dev`, this will be used to validate the props each time the component is
+  created/updated. See [Props Validation](props_validation.md) for more information.
+
+  ```js
+  class Counter extends owl.Component {
+    static props = {
+      initialValue: Number,
+      optional: true,
+    };
+  }
+  ```
+
+- **`defaultProps`** (Object, optional): if given, this object define default
+  values for (top-level) props. Whenever `props` are given to the object, they
+  will be altered to add default value (if missing). Note that it does not
+  change the initial object, a new object will be created instead.
+
+  ```js
+  class Counter extends owl.Component {
+    static defaultProps = {
+      initialValue: 0,
+    };
+  }
+  ```
+
+- **`style`** (string, optional): it should be the return value of the [`css` tag](tags.md#css-tag),
+  which is used to inject stylesheet whenever the component is visible on the
+  screen.
+
+There is another static property defined on the `Component` class: `current`.
+This property is set to the currently being defined component (in the constructor).
+This is the way [hooks](hooks.md) are able to get a reference to the target
+component.
+
+### Methods
+
+We explain here all the public methods of the `Component` class.
+
+- **`mount(target, options)`** (async): this is the main way a
+  component is added to the DOM: the root component is mounted to a target
+  HTMLElement (or document fragment). Obviously, this is asynchronous, since each children need to be
+  created as well. Most applications will need to call `mount` exactly once, on
+  the root component.
+
+  The `options` argument is an optional object with a `position` key. The
+  `position` key can have three possible values: `first-child`, `last-child`, `self`.
+
+  - `first-child`: with this option, the component will be prepended inside the target,
+  - `last-child` (default value): with this option, the component will be
+    appended in the target element,
+  - `self`: the target will be used as the root element for the component. This
+    means that the target has to be an HTMLElement (and not a document fragment).
+    In this situation, it is possible that the component cannot be unmounted. For
+    example, if its target is `document.body`.
+
+  Note that if a component is mounted, unmounted and remounted, it will be
+  automatically re-rendered to ensure that changes in its state (or something
+  in the environment, or in the store, or ...) will be taken into account.
+
+  If a component is mounted inside an element or a fragment which is not in the
+  DOM, then it will be rendered fully, but not active: the `mounted` hooks will
+  not be called. This is sometimes useful if we want to load an application in
+  memory. In that case, we need to mount the root component again in an element
+  which is in the DOM:
+
+  ```js
+  const app = new App();
+  await app.mount(document.createDocumentFragment());
+  // app is rendered in memory, but not active
+  await app.mount(document.body);
+  // app is now visible
+  ```
+
+* **`unmount()`**: in case a component needs to be detached/removed from the DOM, this
+  method can be used. Most applications should not call `unmount`, this is more
+  useful to the underlying component system.
+
+* **`render()`** (async): calling this method directly will cause a rerender. Note
+  that this should be very rare to have to do it manually, the Owl framework is
+  most of the time responsible for doing that at an appropriate moment.
+
+  Note that the render method is asynchronous, so one cannot observe the updated
+  DOM in the same stack frame.
+
+* **`shouldUpdate(nextProps)`**: this method is called each time a component's props
+  are updated. It returns a boolean, which indicates if the component should
+  ignore a props update. If it returns false, then `willUpdateProps` will not
+  be called, and no rendering will occur. Its default implementation is to
+  always return true. This is an optimization, similar to React's `shouldComponentUpdate`. Most of the time, this should not be used, but it
+  can be useful if we are handling large number of components.
+
+* **`destroy()`**. As its name suggests, this method will remove the component,
+  and perform all necessary cleanup, such as unmounting the component, its children,
+  removing the parent/children relationship. This method should almost never be
+  called directly (except maybe on the root component), but should be done by the
+  framework instead.
+
+Obviously, these methods are reserved for Owl, and should not be used by Owl
+users, unless they want to override them. Also, Owl reserves all method names
+starting with `__`, in order to prevent possible future conflicts with user code
+whenever Owl needs to change.
+
+### Lifecycle
+
+A solid and robust component system needs useful hooks/methods to help
+developers write components. Here is a complete description of the lifecycle of
+a owl component:
+
+| Method                                           | Description                                                 |
+| ------------------------------------------------ | ----------------------------------------------------------- |
+| **[constructor](#constructorparent-props)**      | constructor                                                 |
+| **[willStart](#willstart)**                      | async, before first rendering                               |
+| **[mounted](#mounted)**                          | just after component is rendered and added to the DOM       |
+| **[willUpdateProps](#willupdatepropsnextprops)** | async, before props update                                  |
+| **[willPatch](#willpatch)**                      | just before the DOM is patched                              |
+| **[patched](#patchedsnapshot)**                  | just after the DOM is patched                               |
+| **[willUnmount](#willunmount)**                  | just before removing component from DOM                     |
+| **[catchError](#catcherrorerror)**               | catch errors (see [error handling page](error_handling.md)) |
+
+Notes:
+
+- hooks call order is precisely defined: `[willX]` hooks are called first on parent,
+  then on children, and `[Xed]` are called in the reverse order: first children,
+  then parent.
+- no hook method should ever be called manually. They are supposed to be
+  called by the owl framework whenever it is required.
+
+#### `constructor(parent, props)`
+
+The constructor is not exactly a hook, it is the regular,
+normal, constructor of the component. Since it is not a hook, you need to make
+sure that `super` is called.
+
+This is usually where you would set the initial state and the template of the
+component.
+
+```javascript
+  constructor(parent, props) {
+    super(parent, props);
+    this.state = useState({someValue: true});
+    this.template = 'mytemplate';
+  }
+```
+
+Note that with ESNext class fields, the constructor method does not need to be
+implemented in most cases:
+
+```javascript
+class ClickCounter extends owl.Component {
+  state = useState({ value: 0 });
+
+  ...
+}
+```
+
+#### `willStart()`
+
+willStart is an asynchronous hook that can be implemented to
+perform some action before the initial rendering of a component.
+
+It will be called exactly once before the initial rendering. It is useful
+in some cases, for example, to load external assets (such as a JS library)
+before the component is rendered. Another use case is to load data from a server.
+
+```javascript
+  async willStart() {
+    await owl.utils.loadJS("my-awesome-lib.js");
+  }
+```
+
+At this point, the component is not yet rendered. Note that a slow `willStart` method will slow down the rendering of the user
+interface. Therefore, some care should be made to make this method as
+fast as possible.
+
+#### `mounted()`
+
+`mounted` is called each time a component is attached to the
+DOM, after the initial rendering and possibly later if the component was unmounted
+and remounted. At this point, the component is considered _active_. This is a good place to add some listeners, or to interact with the
+DOM, if the component needs to perform some measure for example.
+
+It is the opposite of `willUnmount`. If a component has been mounted, it will
+always be unmounted at some point in the future.
+
+The mounted method will be called recursively on each of its children. First,
+the parent, then all its children.
+
+It is allowed (but not encouraged) to modify the state in the `mounted` hook.
+Doing so will cause a rerender, which will not be perceptible by the user, but
+will slightly slow down the component.
+
+#### `willUpdateProps(nextProps)`
+
+The willUpdateProps is an asynchronous hook, called just before new props
+are set. This is useful if the component needs to perform an asynchronous task,
+depending on the props (for example, assuming that the props are
+some record Id, fetching the record data).
+
+```javascript
+  willUpdateProps(nextProps) {
+    return this.loadData({id: nextProps.id});
+  }
+```
+
+This hook is not called during the first render (but willStart is called
+and performs a similar job).
+
+#### `willPatch()`
+
+The willPatch hook is called just before the DOM patching process starts.
+It is not called on the initial render. This is useful to read
+information from the DOM. For example, the current position of the
+scrollbar.
+
+Note that modifying the state is not allowed here. This method is called just
+before an actual DOM patch, and is only intended to be used to save some local
+DOM state. Also, it will not be called if the component is not in the DOM.
+
+#### `patched(snapshot)`
+
+This hook is called whenever a component did actually update its DOM (most
+likely via a change in its state/props or environment).
+
+This method is not called on the initial render. It is useful to interact
+with the DOM (for example, through an external library) whenever the
+component was patched. Note that this hook will not be called if the component is
+not in the DOM.
+
+Updating the component state in this hook is possible, but not encouraged.
+One needs to be careful, because updates here will create an additional rendering, which in
+turn will cause other calls to the `patched` method. So, we need to be particularly
+careful at avoiding endless cycles.
+
+#### `willUnmount()`
+
+willUnmount is a hook that is called each time just before a component is unmounted from
+the DOM. This is a good place to remove listeners, for example.
+
+```javascript
+  mounted() {
+    this.env.bus.on('someevent', this, this.doSomething);
+  }
+  willUnmount() {
+    this.env.bus.off('someevent', this, this.doSomething);
+  }
+```
+
+This is the opposite method of `mounted`.
+
+#### `catchError(error)`
+
+The `catchError` method is useful when we need to intercept and properly react
+to (rendering) errors that occur in some sub components. See the page on
+[error handling](error_handling.md).
+
+### Root Component
+
+Most of the time, an Owl component will be created automatically by a tag (or the `t-component`
+directive) in a template. There is however an obvious exception: the root component
+of an Owl application has to be created manually:
+
+```js
+class App extends owl.Component { ... }
+
+const app = new App();
+app.mount(document.body);
+```
+
+The root component does not have a parent nor `props` (see note below). It will be setup with an
+[environment](environment.md) (either the `env` defined on its class, or a
+default empty environment).
+
+Note: a root component can however be given a `props` object in its constructor,
+like this: `new App(null, {some: 'object'});`. It will not be a true `props`
+object, managed by Owl (so, for example, it will never be updated).
+
+### Composition
+
+The example above shows a QWeb template with a sub component. In a template,
+components are declared with a tagname corresponding to the class name. It has
+to be capitalized.
+
+```xml
+<div t-name="ParentComponent">
+  <span>some text</span>
+  <MyComponent info="13" />
+</div>
+```
+
+```js
+class ParentComponent extends owl.Component {
+    static components = { MyComponent: MyComponent};
+    ...
+}
+```
+
+In this example, the `ParentComponent`'s template creates a component `MyComponent` just
+after the span. The `info` key will be added to the subcomponent's `props`. Each
+`props` is a string which represents a javascript (QWeb) expression, so it is
+dynamic. If it is necessary to give a string, this can be done by quoting it:
+`someString="'somevalue'"`.
+
+Note that the rendering context for the template is the component itself. This means
+that the template can access `state` (if it exists), `props`, `env`, or any
+methods defined in the component.
+
+```xml
+<div t-name="ParentComponent">
+    <ChildComponent count="state.val" />
+</div>
+```
+
+```js
+class ParentComponent {
+  static components = { ChildComponent };
+  state = useState({ val: 4 });
+}
+```
+
+Whenever the template is rendered, it will automatically create the subcomponent
+`ChildComponent` at the correct place. It needs to find the reference to the
+actual component class in the special static `components` key, or the class registered in
+QWeb's global registry (see `register` function of QWeb). It first looks inside
+the static `components` key, then fallbacks on the global registry.
+
+_Props_: In this example, the child component will receive the object `{count: 4}` in its
+constructor. This will be assigned to the `props` variable, which can be accessed
+on the component (and also, in the template). Whenever the state is updated, then
+the sub component will also be updated automatically. See the [props section](props.md)
+for more information.
+
+**CSS and style:** Owl allows the parent to declare
+additional css classes or style for the sub component: css declared in `class`, `style`, `t-att-class` or `t-att-style` will be added to the
+root component element.
+
+```xml
+<div t-name="ParentComponent">
+  <MyComponent class="someClass" style="font-weight:bold;" info="13" />
+</div>
+```
+
+Warning: there is a small caveat with dynamic class attributes: since Owl needs
+to be able to add/remove proper classes whenever necessary, it needs to be aware
+of the possible classes. Otherwise, it will not be able to make the difference
+between a valid css class added by the component, or other custom code, and a
+class that need to be removed. This is why we only support the explicit syntax
+with a class object:
+
+```xml
+<MyComponent t-att-class="{a: state.flagA, b: state.flagB}" />
+```
+
+### Form Input Bindings
+
+It is very common to need to be able to read the value out of an html `input` (or
+`textarea`, or `select`) in order to use it (note: it does not need to be in a
+form!). A possible way to do this is to do it by hand:
+
+```js
+class Form extends owl.Component {
+  state = useState({ text: "" });
+
+  _updateInputValue(event) {
+    this.state.text = event.target.value;
+  }
+}
+```
+
+```xml
+<div>
+  <input t-on-input="_updateInputValue" />
+  <span t-esc="state.text" />
+</div>
+```
+
+This works. However, this requires a little bit of _plumbing_ code. Also, the
+plumbing code is slightly different if you need to interact with a checkbox,
+or with radio buttons, or with select tags.
+
+To help with this situation, Owl has a builtin directive `t-model`: its value
+should be an observed value in the component (usually `state.someValue`). With
+the `t-model` directive, we can write a shorter code, equivalent to the previous
+example:
+
+```js
+class Form extends owl.Component {
+  state = { text: "" };
+}
+```
+
+```xml
+<div>
+  <input t-model="state.text" />
+  <span t-esc="state.text" />
+</div>
+```
+
+The `t-model` directive works with `<input>`, `<input type="checkbox">`,
+`<input type="radio">`, `<textarea>` and `<select>`:
+
+```xml
+<div>
+    <div>Text in an input: <input t-model="state.someVal"/></div>
+    <div>Textarea: <textarea t-model="state.otherVal"/></div>
+    <div>Boolean value: <input type="checkbox" t-model="state.someFlag"/></div>
+    <div>Selection:
+        <select t-model="state.color">
+            <option value="">Select a color</option>
+            <option value="red">Red</option>
+            <option value="blue">Blue</option>
+        </select>
+    </div>
+    <div>
+        Selection with radio buttons:
+        <span>
+            <input type="radio" name="color" id="red" value="red" t-model="state.color"/>
+            <label for="red">Red</label>
+        </span>
+        <span>
+            <input type="radio" name="color" id="blue" value="blue" t-model="state.color" />
+            <label for="blue">Blue</label>
+        </span>
+    </div>
+</div>
+```
+
+Like event handling, the `t-model` directive accepts the following modifiers:
+
+| Modifier  | Description                                                          |
+| --------- | -------------------------------------------------------------------- |
+| `.lazy`   | update the value on the `change` event (default is on `input` event) |
+| `.number` | try to parse the value to a number (using `parseFloat`)              |
+| `.trim`   | trim the resulting value                                             |
+
+For example:
+
+```xml
+<input t-model.lazy="state.someVal" />
+```
+
+These modifiers can be combined. For instance, `t-model.lazy.number` will only
+update a number whenever the change is done.
+
+Note: the online playground has an example to show how it works.
+
+### References
+
+The `useRef` hook is useful when we need a way to interact with some inside part
+of a component, rendered by Owl. It can work either on a DOM node, or on a component,
+tagged by the `t-ref` directive. See the [hooks section](hooks.md#useref) for
+more detail.
+
+As a short example, here is how we could set the focus on a given input:
+
+```xml
+<div>
+    <input t-ref="input"/>
+    <button t-on-click="focusInput">Click</button>
+</div>
+```
+
+```js
+import { useRef } from "owl/hooks";
+
+class SomeComponent extends Component {
+  inputRef = useRef("input");
+
+  focusInput() {
+    this.inputRef.el.focus();
+  }
+}
+```
+
+The `useRef` hook can also be used to get a reference to an instance of a sub
+component rendered by Owl. In that case, we need to access it with the `comp`
+property instead of `el`:
+
+```xml
+<div>
+    <SubComponent t-ref="sub"/>
+    <button t-on-click="doSomething">Click</button>
+</div>
+```
+
+```js
+import { useRef } from "owl/hooks";
+
+class SomeComponent extends Component {
+  static components = { SubComponent };
+  subRef = useRef("sub");
+
+  doSomething() {
+    this.subRef.comp.doSomeThingElse();
+  }
+}
+```
+
+Note that these two examples uses the suffix `ref` to name the reference. This
+is not mandatory, but it is a useful convention, so we do not forget to access
+it with the `el` or `comp` suffix.
+
+### Dynamic sub components
+
+It is not common, but sometimes we need a dynamic component name. In this case,
+the `t-component` directive can also be used to accept dynamic values with string interpolation (like the [`t-attf-`](qweb_templating_language.md#dynamic-attributes) directive):
+
+```xml
+<div t-name="ParentComponent">
+    <t t-component="ChildComponent{{id}}" />
+</div>
+```
+
+```js
+class ParentComponent {
+  static components = { ChildComponent1, ChildComponent2 };
+  state = { id: 1 };
+}
+```
+
+There is an even more dynamic way to use `t-component`: its value can be an
+expression evaluating to an actual component class. In that case, this is the
+class that will be used to create the component:
+
+```js
+class A extends Component<any, any, any> {
+  static template = xml`<span>child a</span>`;
+}
+class B extends Component<any, any, any> {
+  static template = xml`<span>child b</span>`;
+}
+class App extends Component<any, any, any> {
+  static template = xml`<t t-component="myComponent" t-key="state.child"/>`;
+
+  state = { child: "a" };
+
+  get myComponent() {
+    return this.state.child === "a" ? A : B;
+  }
+}
+```
+
+In this example, the component `App` selects dynamically the concrete sub
+component class.
+
+Note that the `t-component` directive can only be used on `<t>` nodes.
+
+### Functional Components
+
+Owl does not exactly have functional components. However, there is an extremely
+close alternative: calling sub templates.
+
+A stateless functional component in react is usually some kind of function that
+maps props to a virtual dom (often with `jsx`). So, basically, almost like a
+template rendered with `props`. In Owl, this can be done by
+simply defining a template, that will access the `props` object:
+
+```js
+const Welcome = xml`<h1>Hello, {props.name}</h1>`;
+
+class MyComponent extends Component {
+  static template = xml`
+        <div>
+            <t t-call=${Welcome}/>
+            <div>something</div>
+        </div>
+    `;
+}
+```
+
+The way this works is that sub templates are inlined, and have access to the
+ambient context. They can therefore access `props`, and any other part of the
+caller component.
+
+### SVG Components
+
+Owl components can be used to generate dynamic SVG graphs:
+
+```js
+class Node extends Component {
+  static template = xml`
+        <g>
+            <circle t-att-cx="props.x" t-att-cy="props.y" r="4" fill="black"/>
+            <text t-att-x="props.x - 5" t-att-y="props.y + 18"><t t-esc="props.node.label"/></text>
+            <t t-set="childx" t-value="props.x + 100"/>
+            <t t-set="height" t-value="props.height/(props.node.children || []).length"/>
+            <t t-foreach="props.node.children || []" t-as="child">
+                <t t-set="childy" t-value="props.y + child_index*height"/>
+                <line t-att-x1="props.x" t-att-y1="props.y" t-att-x2="childx" t-att-y2="childy" stroke="black" />
+                <Node x="childx" y="childy" node="child" height="height"/>
+            </t>
+        </g>
+    `;
+  static components = { Node };
+}
+
+class RootNode extends Component {
+  static template = xml`
+        <svg height="180">
+            <Node node="graph" x="10" y="20" height="180"/>
+        </svg>
+    `;
+  static components = { Node };
+  graph = {
+    label: "a",
+    children: [
+      { label: "b" },
+      { label: "c", children: [{ label: "d" }, { label: "e" }] },
+      { label: "f", children: [{ label: "g" }] },
+    ],
+  };
+}
+```
+
+This `RootNode` component will then display a live SVG representation of the
+graph described by the `graph` property. Note that there is a recursive structure
+here: the `Node` component uses itself as a subcomponent.
+
+Note that since SVG needs to be handled in a specific way (its namespace needs
+to be properly set), there is a small constraint for Owl components: if an owl
+component is supposed to be a part of an svg graph, then its root node needs to
+be a `g` tag, so Owl can properly set the namespace.

doc/reference/concurrency_model.md

@@ -0,0 +1,183 @@
+# 🦉 Concurrency Model 🦉
+
+## Content
+
+- [Overview](#overview)
+- [Rendering Components](#rendering-components)
+- [Semantics](#semantics)
+- [Asynchronous Rendering](#asynchronous-rendering)
+
+## Overview
+
+Owl was designed from the very beginning with asynchronous components. This comes
+from the `willStart` and the `willUpdateProps` lifecycle hooks. With these
+methods, it is possible to build complex highly concurrent applications.
+
+Owl concurrent mode has several benefits: it makes it possible to delay the
+rendering until some asynchronous operation is complete, it makes it possible
+to lazy load libraries, while keeping the previous screen completely functional.
+It is also good for performance reasons: Owl uses it to only apply the result of
+many different renderings only once in an animation frame. Owl can cancel
+a rendering that is no longer relevant, restart it, reuse it in some cases.
+
+But even though using concurrency is quite simple (and is the default behaviour),
+asynchrony is difficult, because it introduces an additional dimension that
+vastly increase the complexity of an application. This section will explain
+how Owl manages this complexity, how concurrent rendering works in a general way.
+
+## Rendering Components
+
+The word _rendering_ is a little vague, so, let us explain more precisely the
+process by which Owl components are displayed on a screen.
+
+When a component is mounted or updated, a new rendering is started. It has
+two phases: _virtual rendering_ and _patching_.
+
+### Virtual rendering
+
+This phase represent the process of rendering a template, in memory, which create a virtual representation of the desired component html). The output of this phase is a
+virtual DOM.
+
+It is asynchronous: each subcomponents needs to either be created (so, `willStart`
+will need to be called), or updated (which is done with the `willUpdateProps`
+method). This is completely a recursive process: a component is the root of a
+component tree, and each sub component needs to be (virtually) rendered.
+
+### Patching
+
+Once a rendering is complete, it will be applied on the next animation frame.
+This is done synchronously: the whole component tree is patched to the real
+DOM.
+
+## Semantics
+
+We give here an informal description of the way components are created/updated
+in an application. Here, ordered lists describe actions that are executed
+sequentially, bullet lists describe actions that are executed in parallel.
+
+**Scenario 1: initial rendering** Imagine we want to render the following component tree:
+
+```
+        A
+       / \
+      B   C
+         / \
+        D   E
+```
+
+Here is what happen whenever we mount the root
+component (with some code like `app.mount(document.body)`).
+
+1. `willStart` is called on `A`
+
+2. when it is done, template `A` is rendered.
+
+   - component `B` is created
+     1. `willStart` is called on `B`
+     2. template `B` is rendered
+   - component `C` is created
+     1. `willStart` is called on `C`
+     2. template `C` is rendered
+        - component `D` is created
+          1. `willStart` is called on `D`
+          2. template `D` is rendered
+        - component `E` is created
+          1. `willStart` is called on `E`
+          2. template `E` is rendered
+
+3. each components are patched into a detached DOM element, in the following order:
+   `E`, `D`, `C`, `B`, `A`. (so the actual full DOM tree is created
+   in one pass)
+
+4. the component `A` root element is actually appended to `document.body`
+
+5. The method `mounted` is called recursively on all components in the following
+   order: `E`, `D`, `C`, `B`, `A`.
+
+**Scenario 2: rerendering a component**. Now, let's assume that the user clicked on some
+button in `C`, and this results in a state update, which is supposed to:
+
+- update `D`,
+- remove `E`,
+- add new component `F`.
+
+So, the component tree should look like this:
+
+```
+        A
+       / \
+      B   C
+         / \
+        D   F
+```
+
+Here is what Owl will do:
+
+1. because of a state change, the method `render` is called on `C`
+2. template `C` is rendered again
+
+   - component `D` is updated:
+     1. hook `willUpdateProps` is called on `D` (async)
+     2. template `D` is rerendered
+   - component `F` is created:
+     1. hook `willStart` is called on `F` (async)
+     2. template `F` is rendered
+
+3. `willPatch` hooks are called recursively on components `C`, `D` (not on `F`,
+   because it is not mounted yet)
+
+4. components `F`, `D` are patched in that order
+
+5. component `C` is patched, which will cause recursively:
+
+   1. `willUnmount` hook on `E`
+   2. destruction of `E`,
+
+6. `mounted` hook is called on `F`, `patched` hooks are called on `D`, `C`
+
+Tags are very small helpers to make it easy to write inline templates. There is
+only one currently available tag: `xml`, but we plan to add other tags later,
+such as a `css` tag, which will be used to write [single file components](../learning/how_to_write_sfc.md).
+
+### Asynchronous Rendering
+
+Working with asynchronous code always adds a lot of complexity to a system. Whenever
+different parts of a system are active at the same time, one needs to think
+carefully about all possible interactions. Clearly, this is also true for Owl
+components.
+
+There are two different common problems with Owl asynchronous rendering model:
+
+- any component can delay the rendering (initial and subsequent) of the whole
+  application
+- for a given component, there are two independant situations that will trigger an
+  asynchronous rerendering: a change in the state, or a change in the props.
+  These changes may be done at different times, and Owl has no way of knowing
+  how to reconcile the resulting renderings.
+
+Here are a few tips on how to work with asynchronous components:
+
+1. Minimize the use of asynchronous components!
+2. Maybe move the asynchronous logic in a store, which then triggers (mostly)
+   synchronous renderings
+3. Lazy loading external libraries is a good use case for async rendering. This
+   is mostly fine, because we can assume that it will only takes a fraction of a
+   second, and only once (see [`owl.utils.loadJS`](utils.md#loadjs))
+4. For all the other cases, the [`AsyncRoot`](misc.md#asyncroot) component is there to help you. When
+   this component is met, a new rendering
+   sub tree is created, such that the rendering of that component (and its
+   children) is not tied to the rendering of the rest of the interface. It can
+   be used on an asynchronous component, to prevent it from delaying the
+   rendering of the whole interface, or on a synchronous one, such that its
+   rendering isn't delayed by other (asynchronous) components. Note that this
+   directive has no effect on the first rendering, but only on subsequent ones
+   (triggered by state or props changes).
+
+   ```xml
+   <div t-name="ParentComponent">
+     <SyncChild />
+     <AsyncRoot>
+        <AsyncChild/>
+     </AsyncRoot>
+   </div>
+   ```

doc/reference/config.md

@@ -0,0 +1,27 @@
+# 🦉 Config 🦉
+
+The Owl framework is designed to work in many situations. However, it is
+sometimes necessary to customize some behaviour. This is done by using the
+global `config` object. It currently has one key:
+
+- [`mode`](#mode).
+
+## Mode
+
+By default, Owl is in _production_ mode, this means that it will try to do its
+job fast, and skip some expensive operations. However, it is sometimes necessary
+to have better information on what is going on, this is the purpose
+of the `dev` mode.
+
+Owl has a mode flag, in `owl.config.mode`. Its default value is `prod`, but
+it can be set to `dev`:
+
+```js
+owl.config.mode = "dev";
+```
+
+Note that templates compiled with the `prod` settings will not be recompiled.
+So, changing this setting is best done at startup.
+
+An important job done by the `dev` mode is to validate props for each component
+creation and update. Also, extra props will cause an error.

doc/reference/content.md

@@ -0,0 +1,36 @@
+# 🦉 Owl Content 🦉
+
+Here is a complete visual representation of everything exported by the `owl`
+global object.
+
+For example, `Component` is available at `owl.Component` and `EventBus` is
+exported as `owl.core.EventBus`.
+
+```
+Component                               misc
+Context                                     AsyncRoot
+QWeb                                        Portal
+Store                                   router
+useState                                    Link
+config                                      RouteComponent
+    mode                                    Router
+core                                    tags
+    EventBus                                css
+    Observer                                xml
+hooks                                   utils
+    onWillStart                             debounce
+    onMounted                               escape
+    onWillUpdateProps                       loadJS
+    onWillPatch                             loadFile
+    onPatched                               shallowEqual
+    onWillUnmount                           whenReady
+    useContext
+    useState
+    useRef
+    useSubEnv
+    useStore
+    useDispatch
+    useGetters
+```
+
+Note that for convenience, the `useState` hook is also exported at the root of the `owl` object.

doc/reference/context.md

@@ -0,0 +1,105 @@
+# 🦉 Context 🦉
+
+## Content
+
+- [Overview](#overview)
+- [Example](#example)
+- [Reference](#reference)
+  - [`Context`](#context)
+  - [`useContext`](#usecontext)
+
+## Overview
+
+The `Context` object provides a way to share data between an arbitrary number
+of components. Usually, data is passed from a parent to its children component,
+but when we have to deal with some mostly global information, this can be
+annoying, since each component will need to pass the information to each children,
+even though some or most of them will not use the information.
+
+With a `Context` object, each component can subscribe (with the `useContext` hook)
+to its state, and will be updated whenever the context state is updated.
+
+## Example
+
+Assume that we have an application with various components which needs to render
+differently depending on the size of the device. Here is how we could proceed
+to make sure that the information is properly shared. First, let us create a
+context, and add it to the environment:
+
+```js
+const deviceContext = new Context({ isMobile: true });
+App.env.deviceContext = deviceContext;
+```
+
+If we want to make it completely responsive, we need to update its value whenever
+the size of the screen is updated:
+
+```js
+const isMobile = () => window.innerWidth <= 768;
+window.addEventListener(
+  "resize",
+  owl.utils.debounce(() => {
+    const state = deviceContext.state;
+    if (state.isMobile !== isMobile()) {
+      state.isMobile = !state.isMobile;
+    }
+  }, 15)
+);
+```
+
+Then, each component that want can subscribe and render differently depending on the
+fact that we are in a mobile or desktop mode.
+
+```js
+class SomeComponent extends Component {
+  static template = xml`
+    <div>
+      <t t-if=device.isMobile>
+          some simplified user interface
+      </t>
+      <t t-else="">
+          a more advanced user interface
+      </t>
+    </div>`;
+  device = useContext(this.env.deviceContext);
+}
+```
+
+## Reference
+
+### `Context`
+
+A `Context` object should be created with a state object:
+
+```js
+const someContext = new Context({ some: "key" });
+```
+
+Its state is now available in the `state` key:
+
+```js
+someContext.state.some = "other key";
+```
+
+This is the way some global code (such as the responsive code above) should
+read and update the context state. However, components should not ever read the
+context state directly from the context, they should instead use the `useContext`
+hook to properly register themselves to state changes.
+
+Note that the `Context` hook is different from the React version. For example,
+there is no concept of provider/consumer. So, the `Context` feature does not
+by itself allow the use of a different context state depending on the component
+place in the component tree. However, this functionality can be obtained, if
+necessary, with the use of sub environment.
+
+### `useContext`
+
+The `useContext` hook is the normal way for a component to register themselve
+to context state changes. The `useContext` method returns the context state:
+
+```js
+device = useContext(this.env.deviceContext);
+```
+
+It is a simple observed state (with an owl `Observer`), which contains the shared
+information.

doc/reference/environment.md

@@ -0,0 +1,151 @@
+# 🦉 Environment 🦉
+
+## Content
+
+- [Overview](#overview)
+- [Setting an Environment](#setting-an-environment)
+- [Using a sub environment](#using-a-sub-environment)
+- [Content of an Environment](#content-of-an-environment)
+- [Special keys](#special-keys)
+
+## Overview
+
+An environment is an object which contains a [`QWeb` instance](qweb_engine.md). Whenever
+a root component is created, it is assigned an environment (see
+[below](#setting-an-environment) for more info on this). This environment is
+then automatically given to each sub component (and accessible in the `this.env`
+property).
+
+```
+    Root
+    /  \
+   A    B
+```
+
+This way, all components share the same `QWeb` instance. Owl internally requires
+that the environment has a `qweb` key which maps to a
+[`QWeb`](qweb_engine.md) instance. This is the QWeb instance that will be used to
+render each templates in this specific component tree. Note that if no `QWeb`
+instance is provided, Owl will simply generate it on the fly.
+
+The environment is mostly static. Each application is free to add anything to
+the environment, which is very useful, since this can be accessed by each sub
+component.
+
+## Setting an environment
+
+An Owl application needs an [environment](environment.md) to be executed. The
+environment has an important key: the [QWeb](qweb_engine.md) instance, which will render
+all templates.
+
+Whenever a root component `App` is mounted, Owl will setup a valid environment by
+following the next steps:
+
+- take the `env` object defined on `App.env` (if no `env` was explicitly setup,
+  this will return the empty `env` object defined on `Component`)
+- if `env.qweb` is not set, then Owl will create a `QWeb` instance.
+
+The correct way to customize an environment is to simply set it up on the root
+component class, before the first component is created:
+
+```js
+App.env = {
+    _t: myTranslateFunction,
+    user: {...},
+    services: {
+        ...
+    },
+};
+const app = new App();
+app.mount(document.body);
+```
+
+It is also possible to simply share an environment between all root components,
+by simply doing this:
+
+```js
+Component.env = myEnv; // will be the default env for all components
+```
+
+Note that this environment is the global owl environment for an application. The
+next section explains how to extend an environment for a specific sub component
+and its children.
+
+## Using a sub environment
+
+It is sometimes useful to add one (or more) specific keys to the environment,
+from the perspective of a specific component and its children. In that case, the
+solution presented above will not work, since it sets the global environment.
+
+There is a hook for this situation: [`useSubEnv`](hooks.md#usesubenv).
+
+```js
+class FormComponent extends Component {
+  constructor(parent, props) {
+    super(parent, props);
+    useSubEnv({ myKey: someValue });
+  }
+}
+```
+
+## Content of an Environment
+
+Some good use cases for additional keys in the environment are:
+
+- some configuration keys,
+- session information,
+- generic services (such as doing rpcs).
+
+Doing it this way means that components are easily testable: we can simply
+create a test environment with mock services.
+
+For example:
+
+```js
+async function myEnv() {
+  const templates = await loadTemplates();
+  const qweb = new QWeb({ templates });
+  const session = getSession();
+
+  return {
+    _t: myTranslateFunction,
+    session: session,
+    qweb: qweb,
+    services: {
+      localStorage: localStorage,
+      rpc: rpc,
+    },
+    debug: false,
+    inMobileMode: true,
+  };
+}
+
+async function start() {
+  App.env = await myEnv();
+  const app = new App();
+  await app.mount(document.body);
+}
+```
+
+## Special Keys
+
+There are two special key/value added by Owl if not provided in the environment:
+the `QWeb` instance and a `browser` object:
+
+- `qweb` will be set to an empty `QWeb` instance. This is absolutely necessary
+  for Owl to be able to render anything
+- `browser`: this is an object that contains some common access points to the
+  browser methods with a side effect. This is particularly useful when one want
+  to test more advanced components, and be able to mock those methods.
+
+More specifically, the `browser` object contains the following methods and objects:
+
+- `setTimeout`
+- `clearTimeout`
+- `setInterval`
+- `clearInterval`
+- `requestAnimationFrame`
+- `random`
+- `Date`
+- `fetch`
+- `localStorage`

doc/reference/error_handling.md

@@ -0,0 +1,81 @@
+# 🦉 Error Handling 🦉
+
+## Content
+
+- [Overview](#overview)
+- [Example](#example)
+- [Reference](#reference)
+
+## Overview
+
+By default, whenever an error occurs in the rendering of an Owl application, we
+destroy the whole application. Otherwise, we cannot offer any guarantee on the
+state of the resulting component tree. It might be hopelessly corrupted, but
+without any user-visible state.
+
+Clearly, it sometimes is a little bit extreme to destroy the application. This
+is why we have a builtin mechanism to handle rendering errors (and errors coming
+from lifecycle hooks): the `catchError` hook.
+
+## Example
+
+For example, here is how we could implement an `ErrorBoundary` component:
+
+```xml
+<div t-name="ErrorBoundary">
+    <t t-if="state.error">
+        Error handled
+    </t>
+    <t t-else="">
+        <t t-slot="default" />
+    </t>
+</div>
+```
+
+```js
+class ErrorBoundary extends Component {
+  state = useState({ error: false });
+
+  catchError() {
+    this.state.error = true;
+  }
+}
+```
+
+Using the `ErrorBoundary` is then extremely simple:
+
+```xml
+<ErrorBoundary><SomeOtherComponent/></ErrorBoundary>
+```
+
+Note that we need to be careful here: the fallback UI should not throw any
+error, otherwise we risk going into an infinite loop (also, see the page on
+[slots](slots.md) for more information on the `t-slot` directive).
+
+## Reference
+
+Whenever the `catchError` lifecycle hook is implemented, all errors coming from
+sub components rendering and/or lifecycle method calls will be caught and given
+to the `catchError` method. This allows us to properly handle the error, and to
+not break the application.
+
+There are important things to know:
+
+- If an error that occured in the internal rendering cycle is not caught, then
+  Owl will destroy the full application. This is done on purpose, because Owl
+  cannot guarantee that the state is not corrupted from this point on.
+
+- errors coming from event handlers are NOT managed by `catchError` or any other
+  owl mechanism. This is up to the application developer to properly recover
+  from an error
+
+Also, it may be useful to know that whenever an error is caught, it is then
+broadcasted to the application by an event on the `qweb` instance. It may be
+useful, for example, to log the error somewhere.
+
+```js
+env.qweb.on("error", null, function (error) {
+  // do something
+  // react to the error
+});
+```

doc/reference/event_bus.md

@@ -0,0 +1,27 @@
+# 🦉 Event Bus 🦉
+
+It is sometimes useful to use a `Bus` to communicate informations between various
+parts of the code. Owl has a very simple bus class, which manages subscriptions,
+triggering events, and callbacks.
+
+```js
+const bus = new owl.core.EventBus();
+
+bus.on("some-event", null, function (...args) {
+  console.log(...args);
+});
+
+bus.trigger("some-event", 1, 2, 3);
+// [1,2,3] will be logged to the console
+```
+
+Its API is:
+
+| Method                           | Description                       |
+| -------------------------------- | --------------------------------- |
+| `on(eventType, owner, callback)` | add a listener                    |
+| `off(eventType, owner)`          | remove all listeners for an owner |
+| `trigger(eventType, ...args)`    | trigger an event                  |
+| `clear`                          | remove all subscriptions          |
+
+Note that the [`Store`](store.md) is an example of an `EventBus`.

doc/reference/event_handling.md

@@ -0,0 +1,137 @@
+# 🦉 Event Handling 🦉
+
+## Content
+
+- [Event Handling](#event-handling)
+- [Business DOM Events](#business-dom-events)
+- [Inline Event Handlers](#inline-event-handlers)
+- [Modifiers](#modifiers)
+
+## Event Handling
+
+In a component's template, it is useful to be able to register handlers on DOM
+elements to some specific events. This is what makes a template _alive_. There
+are four different use cases.
+
+1. Register an event handler on a DOM node (_pure_ DOM event)
+2. Register an event handler on a component (_pure_ DOM event)
+3. Register an event handler on a DOM node (_business_ DOM event)
+4. Register an event handler on a component (_business_ DOM event)
+
+A _pure_ DOM event is directly triggered by a user interaction (e.g. a `click`).
+
+```xml
+<button t-on-click="someMethod">Do something</button>
+```
+
+This will be roughly translated in javascript like this:
+
+```js
+button.addEventListener("click", component.someMethod.bind(component));
+```
+
+The suffix (`click` in this example) is simply the name of the actual DOM
+event.
+
+## Business DOM Events
+
+A _business_ DOM event is triggered by a call to `trigger` on a component.
+
+```xml
+<MyComponent t-on-menu-loaded="someMethod" />
+```
+
+```js
+ class MyComponent {
+     someWhere() {
+         const payload = ...;
+         this.trigger('menu-loaded', payload);
+     }
+ }
+```
+
+The call to `trigger` generates an `OwlEvent`, a subclass of [_CustomEvent_](https://developer.mozilla.org/docs/Web/Guide/Events/Creating_and_triggering_events)
+with an additional attribute `originalComponent` (the component that triggered
+the event). The generated event is of type `menu-loaded` and dispatches it on
+the component's DOM element (`this.el`). The event bubbles and is cancelable.
+The parent component listening to event `menu-loaded` will receive the payload
+in its `someMethod` handler (in the `detail` property of the event), whenever
+the event is triggered.
+
+```js
+ class ParentComponent {
+     someMethod(ev) {
+         const payload = ev.detail;
+         ...
+     }
+ }
+```
+
+By convention, we use KebabCase for the name of _business_ events.
+
+The `t-on` directive allows to prebind its arguments. For example,
+
+```xml
+<button t-on-click="someMethod(expr)">Do something</button>
+```
+
+Here, `expr` is a valid Owl expression, so it could be `true` or some variable
+from the rendering context.
+
+## Inline Event Handlers
+
+One can also directly specify inline statements. For example,
+
+```xml
+<button t-on-click="state.counter++">Increment counter</button>
+```
+
+Here, `state` must be defined in the rendering context (typically the component)
+as it will be translated to:
+
+```js
+button.addEventListener("click", () => {
+  context.state.counter++;
+});
+```
+
+Warning: inline expressions are evaluated in the context of the template. This
+means that they can access the component methods and properties. But if they set
+a key, the inline statement will actually not modify the component, but a key in
+a sub scope.
+
+```xml
+<button t-on-click="value = 1">Set value to 1 (does not work!!!)</button>
+<button t-on-click="state.value = 1">Set state.value to 1 (work as expected)</button>
+```
+
+## Modifiers
+
+In order to remove the DOM event details from the event handlers (like calls to
+`event.preventDefault`) and let them focus on data logic, _modifiers_ can be
+specified as additional suffixes of the `t-on` directive.
+
+| Modifier   | Description                                                                                                              |
+| ---------- | ------------------------------------------------------------------------------------------------------------------------ |
+| `.stop`    | calls `event.stopPropagation()` before calling the method                                                                |
+| `.prevent` | calls `event.preventDefault()` before calling the method                                                                 |
+| `.self`    | calls the method only if the `event.target` is the element itself                                                        |
+| `.capture` | bind the event handler in [capture](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener) mode. |
+
+```xml
+<button t-on-click.stop="someMethod">Do something</button>
+```
+
+Note that modifiers can be combined (ex: `t-on-click.stop.prevent`), and that
+the order may matter. For instance `t-on-click.prevent.self` will prevent all
+clicks while `t-on-click.self.prevent` will only prevent clicks on the element
+itself.
+
+Finally, empty handlers are tolerated as they could be defined only to apply
+modifiers. For example,
+
+```xml
+<button t-on-click.stop="">Do something</button>
+```
+
+This will simply stop the propagation of the event.

doc/reference/hooks.md

@@ -0,0 +1,447 @@
+# 🦉 Hooks 🦉
+
+## Content
+
+- [Overview](#overview)
+- [Example: Mouse Position](#example-mouse-position)
+- [Example: Autofocus](#example-autofocus)
+- [Reference](#reference)
+  - [One Rule](#one-rule)
+  - [`useState`](#usestate)
+  - [`onMounted`](#onmounted)
+  - [`onWillUnmount`](#onwillunmount)
+  - [`onWillPatch`](#onwillpatch)
+  - [`onPatched`](#onpatched)
+  - [`onWillStart`](#onwillstart)
+  - [`onWillUpdateProps`](#onwillupdateprops)
+  - [`useContext`](#usecontext)
+  - [`useRef`](#useref)
+  - [`useSubEnv`](#usesubenv)
+  - [`useExternalListener`](#useexternallistener)
+  - [`useStore`](#usestore)
+  - [`useDispatch`](#usedispatch)
+  - [`useGetters`](#usegetters)
+  - [Making customized hooks](#making-customized-hooks)
+
+## Overview
+
+Hooks were popularised by React as a way to solve the following issues:
+
+- help reusing stateful logic between components
+- help organizing code by feature in complex components
+- use state in functional components, without writing a class.
+
+Owl hooks serve the same purpose, except that they work for class components
+(note: React hooks do not work on class components, and maybe because of that,
+there seems to be the misconception that hooks are in opposition to class. This
+is clearly not true, as shown by Owl hooks).
+
+Hooks work beautifully with Owl components: they solve the problems mentioned
+above, and in particular, they are the perfect way to make your component
+reactive.
+
+## Example: mouse position
+
+Here is the classical example of a non trivial hook to track the mouse position.
+
+```js
+const { useState, onMounted, onWillUnmount } = owl.hooks;
+
+// We define here a custom behaviour: this hook tracks the state of the mouse
+// position
+function useMouse() {
+  const position = useState({ x: 0, y: 0 });
+
+  function update(e) {
+    position.x = e.clientX;
+    position.y = e.clientY;
+  }
+  onMounted(() => {
+    window.addEventListener("mousemove", update);
+  });
+  onWillUnmount(() => {
+    window.removeEventListener("mousemove", update);
+  });
+
+  return position;
+}
+
+// Main root component
+class App extends owl.Component {
+  static template = xml`
+    <div t-name="App">
+      <div>Mouse: <t t-esc="mouse.x"/>, <t t-esc="mouse.y"/></div>
+    </div>`;
+
+  // this hooks is bound to the 'mouse' property.
+  mouse = useMouse();
+}
+```
+
+Note that we use the prefix `use` for hooks, just like in React. This is just
+a convention.
+
+## Example: autofocus
+
+Hooks can be combined to create the desired effect. For example, the following
+hook combines the `useRef` hook with the `onPatched` and `onMounted` functions
+to create an easy way to focus an input whenever it appears in the DOM:
+
+```js
+function useAutofocus(name) {
+  let ref = useRef(name);
+  let isInDom = false;
+  function updateFocus() {
+    if (!isInDom && ref.el) {
+      isInDom = true;
+      ref.el.focus();
+    } else if (isInDom && !ref.el) {
+      isInDom = false;
+    }
+  }
+  onPatched(updateFocus);
+  onMounted(updateFocus);
+}
+```
+
+This hook takes the name of a valid `t-ref` directive, which should be present
+in the template. It then checks whenever the component is mounted or patched if
+the reference is not valid, and in this case, it will focus the node element.
+This hook can be used like this:
+
+```js
+class SomeComponent extends Component {
+  static template = xml`
+    <div>
+        <input />
+        <input t-ref="myinput"/>
+    </div>`;
+
+  constructor(...args) {
+    super(...args);
+    useAutofocus("myinput");
+  }
+}
+```
+
+## Reference
+
+### One rule
+
+There is only one rule: every hook for a component has to be called in the
+constructor (or in class fields):
+
+```js
+// ok
+class SomeComponent extends Component {
+  state = useState({ value: 0 });
+}
+
+// also ok
+class SomeComponent extends Component {
+  constructor(...args) {
+    super(...args);
+    this.state = useState({ value: 0 });
+  }
+}
+
+// not ok: this is executed after the constructor is called
+class SomeComponent extends Component {
+  async willStart() {
+    this.state = useState({ value: 0 });
+  }
+}
+```
+
+As you can see, the `useState` hook does not need to be given a reference to
+the component. This is possible because there is a way to get a reference to the
+current component: the `Component.current` static property is the reference to the
+component instance that is currently being created.
+
+Hooks need to be called in the constructor to ensure that this reference is
+properly set. This is also a good thing for performance reasons (Owl can use
+this to optimize its implementation), and for a clean architecture (this makes
+it easier for developers to understand what is really happening in a component).
+
+### `useState`
+
+The `useState` hook is certainly the most important hook for Owl components:
+this is what allows a component to be reactive, to react to state change.
+
+The `useState` hook has to be given an object or an array, and will return
+an observed version of it (using a `Proxy`).
+
+```javascript
+const { useState } = owl.hooks;
+
+class Counter extends owl.Component {
+  static template = xml`
+    <button t-on-click="increment">
+        Click Me! [<t t-esc="state.value"/>]
+    </button>`;
+
+  state = useState({ value: 0 });
+
+  increment() {
+    this.state.value++;
+  }
+}
+```
+
+It is important to remember that `useState` only works with objects or arrays. It
+is necessary, since Owl needs to react to a change in state.
+
+### `onMounted`
+
+`onMounted` is not a user hook, but is a building block designed to help make useful
+abstractions. `onMounted` registers a callback, which will be called when the component
+is mounted (see example on top of this page).
+
+### `onWillUnmount`
+
+`onWillUnmount` is not a user hook, but is a building block designed to help make useful
+abstractions. `onWillUnmount` registers a callback, which will be called when the component
+is unmounted (see example on top of this page).
+
+### `onWillPatch`
+
+`onWillPatch` is not a user hook, but is a building block designed to help make useful
+abstractions. `onWillPatch` registers a callback, which will be called just
+before the component patched.
+
+### `onPatched`
+
+`onPatched` is not a user hook, but is a building block designed to help make useful
+abstractions. `onPatched` registers a callback, which will be called just
+after the component patched.
+
+### `onWillStart`
+
+`onWillStart` is an asynchronous hook. This means that the function registered
+in the hook will be run just before the component is first rendered and can return a
+promise, to express the fact that it is an asynchronous operation.
+
+Note that if there are more than one `onWillStart` registered callback, then they
+will all be run in parallel.
+
+It can be used to load some initial data. For example, the following hook will
+automatically load some data from the server, and return an object that will
+be ready whenever the component is rendered:
+
+```js
+function useLoader() {
+  const component = Component.current;
+  const record = useState({});
+  onWillStart(async () => {
+    const recordId = component.props.id;
+    Object.assign(record, await fetchSomeRecord(recordId));
+  });
+  return record;
+}
+```
+
+Note that this example does not update the record value whenever props are
+updated. For that situation, we need to use the `onWillUpdateProps` hook.
+
+### `onWillUpdateProps`
+
+Just like `onWillStart`, `onWillUpdateProps` is an asynchronous hook. It is
+designed to be run whenever the component props are updated. This could be
+useful to perform some asynchronous task such as fetching updated data.
+
+```js
+function useLoader() {
+  const component = Component.current;
+  const record = useState({});
+
+  async function updateRecord(id) {
+    Object.assign(record, await fetchSomeRecord(id));
+  }
+
+  onWillStart(() => updateRecord(component.props.id));
+  onWillUpdateProps((nextProps) => updateRecord(nextProps.id));
+
+  return record;
+}
+```
+
+Note that if there are more than one `onWillUpdateProps` registered callback,
+then they will all be run in parallel.
+
+### `useContext`
+
+See [`useContext`](context.md#usecontext) for reference documentation.
+
+### `useRef`
+
+The `useRef` hook is useful when we need a way to interact with some inside part
+of a component, rendered by Owl. It can work either on a DOM node, or on a component,
+tagged by the `t-ref` directive:
+
+```xml
+<div>
+    <div t-ref="someDiv"/>
+    <SubComponent t-ref="someComponent"/>
+</div>
+```
+
+In this example, the component will be able to access the `div` and the component
+`SubComponent` using the `useRef` hook:
+
+```js
+class Parent extends Component {
+  subRef = useRef("someComponent");
+  divRef = useRef("someDiv");
+
+  someMethod() {
+    // here, if component is mounted, refs are active:
+    // - this.divRef.el is the div HTMLElement
+    // - this.subRef.comp is the instance of the sub component
+    // - this.subRef.el is the root HTML node of the sub component (i.e. this.subRef.comp.el)
+  }
+}
+```
+
+As shown by the example above, html elements are accessed by using the `el`
+key, and components references are accessed with `comp`.
+
+Notes:
+
+- if used on a component, the reference will be set in the `refs`
+  variable between `willPatch` and `patched`,
+- on a component, accessing `ref.el` will get the root node of the component.
+
+The `t-ref` directive also accepts dynamic values with string interpolation
+(like the [`t-attf-`](qweb_templating_language.md#dynamic-attributes) and
+`t-component` directives). For example,
+
+```xml
+<div t-ref="component_{{someCondition ? '1' : '2'}}"/>
+```
+
+Here, the references need to be set like this:
+
+```js
+this.ref1 = useRef("component_1");
+this.ref2 = useRef("component_2");
+```
+
+References are only guaranteed to be active while the parent component is mounted.
+If this is not the case, accessing `el` or `comp` on it will return `null`.
+
+### `useSubEnv`
+
+The environment is sometimes useful to share some common information between
+all components. But sometimes, we want to _scope_ that knowledge to a subtree.
+
+For example, if we have a form view component, maybe we would like to make some
+`model` object available to all sub components, but not to the whole application.
+This is where the `useSubEnv` hook may be useful: it lets a component add some
+information to the environment in a way that only the component and its children
+can access it:
+
+```js
+class FormComponent extends Component {
+  constructor(...args) {
+    super(...args);
+    const model = makeModel();
+    useSubEnv({ model });
+  }
+}
+```
+
+The `useSubEnv` takes one argument: an object which contains some key/value that
+will be added to the parent environment. Note that it will extend, not replace
+the parent environment. And of course, the parent environment will not be
+affected.
+
+### `useExternalListener`
+
+The `useExternalListener` hook helps solve a very common problem: adding and removing
+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);
+```
+
+### `useStore`
+
+The `useStore` hook is the entry point for a component to connect to the store.
+See the [store documentation](store.md) for more information.
+
+### `useDispatch`
+
+The `useDispatch` hook is the way for components to get a reference to the store
+`dispatch` function. See the [store documentation](store.md) for more information.
+
+### `useGetters`
+
+The `useGetters` hook is the way for components to get a reference to the store
+getters. See the [store documentation](store.md) for more information.
+
+### Making customized hooks
+
+Hooks are a wonderful way to organize the code of a complex component by feature
+instead of by lifecycle methods. They are like mixins, except that they can be
+easily composed together.
+
+But, like every good things in life, hooks should be used with moderation. They are
+not the solution to every problem.
+
+- they may be overkill: if your component needs to perform some action specific
+  to itself (so, the specific code does not need to be shared), there is nothing
+  wrong with a simple class method:
+
+  ```js
+  // maybe overkill
+  class A extends Component {
+    constructor(...args) {
+      super(...args);
+      useMySpecificHook();
+    }
+  }
+
+  // ok
+  class B extends Component {
+    constructor(...args) {
+      super(...args);
+      this.performSpecificTask();
+    }
+  }
+  ```
+
+  Note that the second solution is easier to extend in sub components.
+
+- they may be harder to test: if a customized hook injects some external side
+  effect dependency, then it is harder to test without doing some non obvious
+  manipulation. For example, assume that we want to give a reference to a
+  router in a `useRouter` hook. We could do this:
+
+  ```js
+  const router = new Router(...);
+
+  function useRouter() {
+      return router;
+  }
+  ```
+
+  As you can see, this does not _hook_ into the internal of the component. It
+  simply returns a global object, which is difficult to mock.
+
+  A better way would be to do something like this: get the reference from the
+  environment.
+
+  ```js
+  function useRouter() {
+    return Component.current.env.router;
+  }
+  ```
+
+  This means that we give control to the application developer to create the
+  router, which is good, so they can set it up, subclass it, ... And then, to
+  test our components, we can just add a mock router in the environment.
+
+Note: the code above makes use of the `Component.current` property. This is the
+way hooks are able to get a reference to the component currently being created.

doc/reference/misc.md

@@ -0,0 +1,134 @@
+# 🦉 Miscellaneous 🦉
+
+## Content
+
+- [Portal](#portal)
+- [AsyncRoot](#asyncroot)
+
+## `Portal`
+
+### Overview
+
+The component `Portal` is meant to be used as a transparent way to 'teleport' a piece
+of DOM to the node represented by its sole `target` props.
+
+This component aims at helping the implementation of the needed infrastructure
+for modals (as in `bootstrap-modal`).
+
+### Usage
+
+The content it will teleport is defined within the `<Portal>` node and
+internally uses the `default` [Slot](slots.md).
+
+This slot must contain only **one** node, which in turn can have as many children as necessary.
+
+The element under which the content will be teleported is represented as a selector
+by the `target` props which only accepts a string as value.
+
+The `target` props only supports static selector, and is not meant to be passed to `Portal`
+as a variable. Namely, `<Portal target="'body'" />` is the intended use.
+By contrast, `<Portal target="state.target" />` is not supported.
+
+The component `Portal` has no particular state, rather it is meant to be a slave to its parent,
+and ultimately just a way for the parent to teleport a piece of its own DOM elsewhere.
+
+The `Portal`'s root node is always `<portal/>` and is placed where the teleported content
+_would have_ been. It is this element that the [teleported events](#expected-behaviors) are re-directed on.
+
+### Example
+
+The canonic use-case is to implement a Dialog, where a Component may choose to break the natural
+workflow to help the user put in some data, which it could use later on.
+
+JavaScript:
+
+```js
+const { Component } = owl;
+const { Portal } = owl.misc;
+
+class TeleportedComponent extends Component {}
+class App extends Component {
+  static components = { Portal, TeleportedComponent };
+}
+
+const app = new App();
+app.mount(document.body);
+```
+
+XML:
+
+```xml
+<templates>
+    <div t-name="TeleportedComponent">
+        <span>I will move soon enough</span>
+    </div>
+
+    <div t-name="App">
+        <span>I am like the rest of us</span>
+        <Portal target="'body'">
+            <TeleportedComponent />
+        </Portal>
+    </div>
+</templates>
+```
+
+In this example, the `Portal` component will teleport the `TeleportedComponent`'s `div` as a child of the `body`.
+`TeleportedComponent` is acting as a Dialog here.
+
+The resulting DOM will look like:
+
+```xml
+<body>
+    <div>
+        <span>I am like the rest of us</span>
+        <portal></portal>
+    </div>
+    <div>
+        <span>I will move soon enough</span>
+    </div>
+</body>
+```
+
+### Expected Behaviors
+
+The teleported piece is updated as any other `Component`'s DOM and in the same sequence.
+Namely the teleported piece will be updated in function of its parents components, and patched as
+a normal child.
+
+The [_business_ events](event_handling.md#business-dom-events) triggered by a child component will be stopped
+to not bubble outside of the `target`. They will, on the other hand, be re-directed onto the
+`Portal`'s root node and bubble up the DOM as if it were triggered by a regular child component.
+
+Beware that those re-directed events are copies of the original event.
+They have:
+
+- The same payload.
+- The same `originalComponent` than their original counterpart,
+  that is the actual Component that triggered it.
+- A **different** `target` property than their original counterpart.
+  The `target` of a re-directed event is necessarily the `Portal`'s root node.
+
+Pure DOM events do not follow this pattern and are free to bubble their natural, unaltered way
+up to the `body`.
+
+## `AsyncRoot`
+
+When this component is used, a new rendering sub tree is created, such that the
+rendering of that component (and its children) is not tied to the rendering of
+the rest of the interface. It can be used on an asynchronous component, to
+prevent it from delaying the rendering of the whole interface, or on a
+synchronous one, such that its rendering isn't delayed by other (asynchronous)
+components. Note that this directive has no effect on the first rendering, but
+only on subsequent ones (triggered by state or props changes).
+
+```xml
+<div t-name="ParentComponent">
+  <SyncChild />
+  <AsyncRoot>
+     <AsyncChild/>
+  </AsyncRoot>
+</div>
+```
+
+The `AsyncRoot` assumes that there is exactly one root node inside it. It can
+be a dom node or a component.

doc/reference/observer.md

@@ -0,0 +1,52 @@
+# 🦉 Observer 🦉
+
+Owl needs to be able to react to state changes. For example, whenever the state
+of a component is changed, Owl needs to rerender it. To help with that, there is
+an Observer class. Its job is to observe the state of an object (or array), and
+to react to any change. The observer is implemented with the native `Proxy`
+object. Note that this means that it will not work on older browsers.
+
+Note that the `Observer` is used by the `useState` and `useContext` hooks. This
+is the way most Owl applications will create observers. For the majority of
+use cases, there is no need to directly instantiate an observer.
+
+## Example
+
+For example, this code will display `update` in the console:
+
+```javascript
+const observer = new owl.Observer();
+observer.notifyCB = () => console.log("update");
+const obj = observer.observe({ a: { b: 1 } });
+
+obj.a.b = 2;
+```
+
+This example shows that an observer can observe nested properties.
+
+## Reference
+
+**observe** An observer can observe multiple values with the `observe` method.
+This method takes an object or an array as its argument and will return a proxy
+(which is mapped to the initial object/array). With this proxy, the observer
+can detect whenever any internal value is changed.
+
+**Registering a callback** Whenever an observer sees a state change, it will
+call its `notifyCB` method. No additional information is given to the callback.
+
+**deepRevNumber** Each observed value has an internal revision number, which
+is incremented every time the value is observed. Sometimes, it can be useful
+to obtain that number:
+
+```js
+const observer = new owl.Observer();
+const obj = observer.observe({ a: { b: 1 } });
+
+observer.deepRevNumber(obj.a); // 1
+obj.a.b = 2;
+
+observer.deepRevNumber(obj.a); // 2
+```
+
+The `deepRevNumber` can also return 0, which indicates that the value is not
+observed.

doc/reference/props.md

@@ -0,0 +1,97 @@
+# 🦉 Props 🦉
+
+## Content
+
+- [Overview](#overview)
+- [Definition](#definition)
+- [Good Practices](#good-practices)
+- [Dynamic Props](#dynamic-props)
+
+## Overview
+
+In Owl, `props` (short for _properties_) is an object which contains every piece
+of data given to a component by its parent.
+
+```js
+class Child extends Component {
+  static template = xml`<div><t t-esc="props.a"/><t t-esc="props.b"/></div>`;
+}
+
+class Parent extends Component {
+  static template = xml`<div><ComponentA a="state.a" b="'string'"/></div>`;
+  static components = { Child };
+  state = useState({ a: "fromparent" });
+}
+```
+
+In this example, the `Child` component receives two props from its parent: `a`
+and `b`. They are collected into a `props` object by Owl, with each value being
+evaluated in the context of the parent. So, `props.a` is equal to `'fromparent'` and
+`props.b` is equal to `'string'`.
+
+Note that `props` is an object that only makes sense from the perspective of the
+child component.
+
+## Definition
+
+The `props` object is made of every attributes defined on the template, with the
+following exceptions:
+
+- every attribute starting with `t-` are not props (they are QWeb directives),
+- `style` and `class` attributes are excluded as well (they are applied by Owl on
+  the root element of the component).
+
+In the following example:
+
+```xml
+<div>
+    <ComponentA a="state.a" b="'string'"/>
+    <ComponentB t-if="state.flag" model="model"/>
+    <ComponentC style="color:red;" class="left-pane" />
+</div>
+```
+
+the `props` object contains the following keys:
+
+- for `ComponentA`: `a` and `b`,
+- for `ComponentB`: `model`,
+- for `ComponentC`: empty object
+
+## Good Practices
+
+A `props` object is a collection of values that come from the parent. As such,
+they are owned by the parent, and should never be modified by the child:
+
+```js
+class MyComponent extends Component {
+  constructor(parent, props) {
+    super(parent, props);
+    props.a.b = 43; // Never do that!!!
+  }
+}
+```
+
+Props should be considered readonly, from the perspective of the child component.
+If there is a need to modify them, then the request to update them should be
+sent to the parent (for example, with an event).
+
+Any value can go in a props. Strings, objects, classes, or even callbacks could
+be given to a child component (but then, in the case of callbacks, communicating
+with events seems more appropriate).
+
+## Dynamic Props
+
+The `t-props` directive can be used to specify totally dynamic props:
+
+```xml
+<div t-name="ParentComponent">
+    <Child t-props="some.obj"/>
+</div>
+```
+
+```js
+class ParentComponent {
+  static components = { Child };
+  some = { obj: { a: 1, b: 2 } };
+}
+```

doc/reference/props_validation.md

@@ -0,0 +1,103 @@
+# 🦉 Props Validation 🦉
+
+As an application becomes complex, it may be quite unsafe to define props in an informal way. This leads to two issues:
+
+- hard to tell how a component should be used, by looking at its code.
+- unsafe, it is easy to send wrong props into a component, either by refactoring a component, or one of its parents.
+
+A props type system solves both issues, by describing the types and shapes
+of the props. Here is how it works in Owl:
+
+- `props` key is a static key (so, different from `this.props` in a component instance)
+- it is optional: it is ok for a component to not define a `props` key.
+- props are validated whenever a component is created/updated
+- props are only validated in `dev` mode (see [config page](config.md#mode))
+- if a key does not match the description, an error is thrown
+- it validates keys defined in (static) `props`. Additional keys given by the
+  parent will cause an error.
+
+For example:
+
+```js
+class ComponentA extends owl.Component {
+    static props = ['id', 'url'];
+
+    ...
+}
+
+class ComponentB extends owl.Component {
+  static props = {
+    count: {type: Number},
+    messages: {
+      type: Array,
+      element: {type: Object, shape: {id: Boolean, text: String }
+    },
+   date: Date,
+   combinedVal: [Number, Boolean]
+  };
+
+  ...
+}
+```
+
+- it is an object or a list of strings
+- a list of strings is a simplified props definition, which only lists the name
+  of the props. Also, if the name ends with `?`, it is considered optional.
+- all props are by default required, unless they are defined with `optional: true`
+  (in that case, validation is only done if there is a value)
+- valid types are: `Number, String, Boolean, Object, Array, Date, Function`, and all
+  constructor functions (so, if you have a `Person` class, it can be used as a type)
+- arrays are homogeneous (all elements have the same type/shape)
+
+For each key, a `prop` definition is either a boolean, a constructor, a list of constructors, or an object:
+
+- a boolean: indicate that the props exists, and is mandatory.
+- a constructor: this should describe the type, for example: `id: Number` describe
+  the props `id` as a number
+- a list of constructors. In that case, this means that we allow more than one
+  type. For example, `id: [Number, String]` means that `id` can be either a string
+  or a number.
+- an object. This makes it possible to have more expressive definition. The following sub keys are then allowed (but not mandatory):
+  - `type`: the main type of the prop being validated
+  - `element`: if the type was `Array`, then the `element` key describes the type of each element in the array. If it is not set, then we only validate the array, not its elements,
+  - `shape`: if the type was `Object`, then the `shape` key describes the interface of the object. If it is not set, then we only validate the object, not its elements,
+  - `validate`: this is a function which should return a boolean to determine if
+    the value is valid or not. Useful for custom validation logic.
+
+Examples:
+
+```js
+  // only the existence of those 3 keys is documented
+  static props = ['message', 'id', 'date'];
+```
+
+```js
+  // size is optional
+  static props = ['message', 'size?'];
+```
+
+```js
+  static props = {
+    messageIds: {type: Array, element: Number},  // list of number
+    otherArr: {type: Array},   // just array. no validation is made on sub elements
+    otherArr2: Array,   // same as otherArr
+    someObj: {type: Object},  // just an object, no internal validation
+    someObj2: {
+      type: Object,
+      shape: {
+        id: Number,
+        name: {type: String, optional: true},
+        url: String
+      ]},    // object, with keys id (number), name (string, optional) and url (string)
+    someFlag: Boolean,     // a boolean, mandatory (even if `false`)
+    someVal: [Boolean, Date],   // either a boolean or a date
+    otherValue: true,     // indicates that it is a prop
+    kindofsmallnumber: {
+      type: Number,
+      validate: n => (0 <= n && n <= 10)
+    },
+    size: {
+      validate:  e => ["small", "medium", "large"].includes(e)
+    },
+  };
+```

doc/reference/qweb_engine.md

@@ -0,0 +1,151 @@
+# 🦉 QWeb Engine 🦉
+
+## Content
+
+- [Overview](#overview)
+- [Reference](#reference)
+
+## Overview
+
+[QWeb](https://www.odoo.com/documentation/13.0/reference/qweb.html) is the primary
+templating engine used by Odoo. The QWeb class in the OWL project is an
+implementation of that specification with a few interesting points:
+
+- it compiles templates into functions that output a virtual DOM instead of a
+  string. This is necessary for the component system.
+- it has a few extra directives: `t-component`, `t-on`, ...
+
+We present in this section the engine, not the templating language.
+
+## Reference
+
+This section is about the javascript code that implements the `QWeb` specification.
+Owl exports a `QWeb` class in `owl.QWeb`. To use it, it just needs to be
+instantiated:
+
+```js
+const qweb = new owl.QWeb();
+```
+
+Its API is quite simple:
+
+- **`constructor(config)`**: constructor. Takes an optional configuration object
+  with an optional `templates` string to add initial
+  templates (see `addTemplates` for more information on format of the string)
+  and an optional `translateFn` translate function (see the section on
+  [translations](#translations)).
+
+  ```js
+  const qweb = new owl.QWeb({ templates: TEMPLATES, translateFn: _t });
+  ```
+
+- **`addTemplate(name, xmlStr, allowDuplicate)`**: add a specific template.
+
+  ```js
+  qweb.addTemplate("mytemplate", "<div>hello</div>");
+  ```
+
+  If the optional `allowDuplicate` is set to `true`, then `QWeb` will simply
+  ignore templates added for a second time. Otherwise, `QWeb` will crash.
+
+- **`addTemplates(xmlStr)`**: add a list of templates (identified by `t-name`
+  attribute).
+
+  ```js
+  const TEMPLATES = `
+    <templates>
+      <div t-name="App" class="main">main</div>
+      <div t-name="OtherComponent">other component</div>
+    </templates>`;
+  qweb.addTemplates(TEMPLATES);
+  ```
+
+- **`render(name, context, extra)`**: renders a template. This returns a `vnode`,
+  which is a virtual representation of the DOM (see [vdom doc](../miscellaneous/vdom.md)).
+
+  ```js
+  const vnode = qweb.render("App", component);
+  ```
+
+- **`renderToString(name, context)`**: renders a template, but returns an html
+  string.
+
+  ```js
+  const str = qweb.renderToString("someTemplate", somecontext);
+  ```
+
+- **`registerTemplate(name, template)`**: static function to register a global
+  QWeb template. This is useful for commonly used components accross the
+  application, and for making a template available to an application without
+  having a reference to the actual QWeb instance.
+
+  ```js
+  QWeb.registerTemplate("mytemplate", `<div>some template</div>`);
+  ```
+
+- **`registerComponent(name, Component)`**: static function to register an OWL Component
+  to QWeb's global registry. Globally registered Components can be used in
+  templates (see the `t-component` directive). This is useful for commonly used
+  components accross the application.
+
+  ```js
+  class Dialog extends owl.Component { ... }
+  QWeb.registerComponent("Dialog", Dialog);
+
+  ...
+
+  class ParentComponent extends owl.Component { ... }
+  qweb.addTemplate("ParentComponent", "<div><Dialog/></div>");
+  ```
+
+In some way, a `QWeb` instance is the core of an Owl application. It is the only
+mandatory element of an [environment](environment.md). As such, it
+has an extra responsibility: it can act as an event bus for internal communication
+between Owl classes. This is the reason why `QWeb` actually extends [EventBus](event_bus.md).
+
+### Translations
+
+If properly setup, Owl QWeb engine can translate all rendered templates. To do
+so, it needs a translate function, which takes a string and returns a string.
+
+For example:
+
+```js
+const translations = {
+  hello: "bonjour",
+  yes: "oui",
+  no: "non",
+};
+const translateFn = (str) => translations[str] || str;
+
+const qweb = new QWeb({ translateFn });
+```
+
+Once setup, all rendered templates will be translated using `translateFn`:
+
+- each text node will be replaced with its translation,
+- each of the following attribute values will be translated as well: `title`,
+  `placeholder`, `label` and `alt`,
+- translating text nodes can be disabled with the special attribute `t-translation`,
+  if its value is `off`.
+
+So, with the above `translateFn`, the following templates:
+
+```xml
+<div>hello</div>
+<div t-translation="off">hello</div>
+<div>Are you sure?</div>
+<input placeholder="hello" other="yes"/>
+```
+
+will be rendered as:
+
+```xml
+<div>bonjour</div>
+<div>hello</div>
+<div>Are you sure?</div>
+<input placeholder="bonjour" other="yes"/>
+```
+
+Note that the translation is done during the compilation of the template, not
+when it is rendered.

doc/reference/qweb_templating_language.md

@@ -0,0 +1,548 @@
+# 🦉 QWeb Templating Language🦉
+
+## Content
+
+- [Overview](#overview)
+- [Directives](#directives)
+- [Reference](#reference)
+  - [White Spaces](#white-spaces)
+  - [Root Nodes](#root-nodes)
+  - [Expression Evaluation](#expression-evaluation)
+  - [Static html Nodes](#static-html-nodes)
+  - [Outputting Data](#outputting-data)
+  - [Setting Variables](#setting-variables)
+  - [Conditionals](#conditionals)
+  - [Dynamic Attributes](#dynamic-attributes)
+  - [Loops](#loops)
+  - [Rendering Sub Templates](#rendering-sub-templates)
+  - [Translations](#translations)
+  - [Debugging](#debugging)
+
+## Overview
+
+[QWeb](https://www.odoo.com/documentation/13.0/reference/qweb.html) is the primary
+templating engine used by Odoo. It is based on the XML format, and used
+mostly to generate HTML. In OWL, QWeb templates are compiled into functions that
+generate a virtual dom representation of the HTML.
+
+```xml
+<div>
+    <span t-if="somecondition">Some string</span>
+    <ul t-else="">
+        <li t-foreach="messages" t-as="message">
+            <t t-esc="message"/>
+        </li>
+    </ul>
+</div>
+```
+
+Template directives are specified as XML attributes prefixed with `t-`, for
+instance `t-if` for conditionals, with elements and other attributes being
+rendered directly.
+
+To avoid element rendering, a placeholder element `<t>` is also available, which
+executes its directive but doesn’t generate any output in and of itself.
+
+We present in this section the templating language, including its Owl specific
+extensions.
+
+## Directives
+
+For reference, here is a list of all standard QWeb directives:
+
+| Name                           | Description                                                    |
+| ------------------------------ | -------------------------------------------------------------- |
+| `t-esc`                        | [Outputting safely a value](#outputting-data)                  |
+| `t-raw`                        | [Outputting value, 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](#rendering-sub-templates)            |
+| `t-debug`, `t-log`             | [Debugging](#debugging)                                        |
+| `t-translation`                | [Disabling the translation of a node](#translations)           |
+| `t-name`                       | [Defining a template (not really a directive)](qweb_engine.md) |
+
+The component system in Owl requires additional directives, to express various
+needs. Here is a list of all Owl specific directives:
+
+| Name                     | Description                                                                     |
+| ------------------------ | ------------------------------------------------------------------------------- |
+| `t-component`, `t-props` | [Defining a sub component](component.md#composition)                            |
+| `t-ref`                  | [Setting a reference to a dom node or a sub component](component.md#references) |
+| `t-key`                  | [Defining a key (to help virtual dom reconciliation)](#loops)                   |
+| `t-on-*`                 | [Event handling](event_handling.md)                                             |
+| `t-transition`           | [Defining an animation](animations.md#css-transitions)                          |
+| `t-slot`                 | [Rendering a slot](slots.md)                                                    |
+| `t-model`                | [Form input bindings](component.md#form-input-bindings)                         |
+
+## Reference
+
+### White Spaces
+
+White spaces in a template are handled in a special way:
+
+- consecutive whitespaces are always condensed to a single whitespace
+- if a whitespace-only text node contains a linebreak, it is ignored
+- the previous rules do not apply if we are in a `<pre>` tag
+
+### Root Nodes
+
+For many reasons, Owl QWeb templates should have a single root node. More
+precisely, the result of a template rendering should have a single root node:
+
+```xml
+<!–– not ok: two root nodes ––>
+<t>
+    <div>foo</div>
+    <div>bar</div>
+</t>
+
+<!–– ok: result has one single root node ––>
+<t>
+    <div t-if="someCondition">foo</div>
+    <span t-else="">bar</span>
+</t>
+```
+
+Extra root nodes will actually be ignored (even though they will be rendered
+in memory).
+
+Note: this does not apply to subtemplates (see the `t-call` directive). In that
+case, they will be inlined in the main template, and can actually have many
+root nodes.
+
+### Expression Evaluation
+
+QWeb expressions are strings that will be processed at compile time. Each variable in
+the javascript expression will be replaced with a lookup in the context (so, the
+component). For example, `a + b.c(d)` will be converted into:
+
+```js
+context["a"] + context["b"].c(context["d"]);
+```
+
+It is useful to explain the various rules that apply on these expressions:
+
+1. it should be a simple expression which returns a value. It cannot be a statement.
+
+   ```xml
+   <div><p t-if="1 + 2 === 3">ok</p></div>
+   ```
+
+   is valid, but the following is not valid:
+
+   ```xml
+   <div><p t-if="console.log(1)">NOT valid</p></div>
+   ```
+
+2. it can use anything in the rendering context (typically, the component):
+
+   ```xml
+   <p t-if="user.birthday === today()">Happy bithday!</p>
+   ```
+
+   is valid, and will read the `user` object from the context, and call the
+   `today` function.
+
+3. it can use a few special operators to avoid using symbols such as `<`, `>`,
+   `&` or `|`. This is useful to make sure that we still write valid XML.
+
+   | Word  | replaced with |
+   | ----- | ------------- |
+   | `and` | `&&`          |
+   | `or`  | `\|\|`        |
+   | `gt`  | `>`           |
+   | `gte` | `>=`          |
+   | `lt`  | `<`           |
+   | `lte` | `<=`          |
+
+   So, one can write this:
+
+   ```xml
+   <div><p t-if="10 + 2 gt 5">ok</p></div>
+   ```
+
+### Static Html Nodes
+
+Normal, regular html nodes are rendered into themselves:
+
+```xml
+  <div>hello</div> <!–– rendered as itself ––>
+```
+
+### Outputting Data
+
+The `t-esc` directive is necessary whenever you want to add a dynamic text
+expression in a template. The text is escaped to avoid security issues.
+
+```xml
+<p><t t-esc="value"/></p>
+```
+
+rendered with the value `value` set to `42` in the rendering context yields:
+
+```html
+<p>42</p>
+```
+
+The `t-raw` directive is almost the same as `t-esc`, but without the escaping.
+This is mostly useful to inject a raw html string somewhere. Obviously, this
+is unsafe to do in general, and should only be used for strings known to be safe.
+
+```xml
+<p><t t-raw="value"/></p>
+```
+
+rendered with the value `value` set to `<span>foo</span>` in the rendering context yields:
+
+```html
+<p><span>foo</span></p>
+```
+
+Note that since the content of the expression is not known beforehand, the `t-raw`
+directive has to parse the html (and convert it to a virtual dom structure) for
+each rendering. So, it will be much slower than a regular template. It is
+therefore advised to limit the use of `t-raw` whenever possible.
+
+### 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, ...
+
+This is done via the `t-set` directive, which takes the name of the variable to create. The value to set can be provided in two ways:
+
+1. a `t-value` attribute containing an expression, and the result of its
+   evaluation will be set:
+
+   ```xml
+   <t t-set="foo" t-value="2 + 1"/>
+   <t t-esc="foo"/>
+   ```
+
+   will print `3`. Note that the evaluation is done at rendering time, not at
+   compilte time.
+
+2. if there is no `t-value` attribute, the node’s body is saved and its value is
+   set as the variable’s value:
+
+   ```xml
+   <t t-set="foo">
+       <li>ok</li>
+   </t>
+   <t t-esc="foo"/>
+   ```
+
+   will generate `&lt;li&gt;ok&lt;/li&gt;` (the content is escaped as we used the `t-esc` directive)
+
+The `t-set` directive acts like a regular variable in most programming language.
+It is lexically scoped (inner nodes are sub scopes), can be shadowed, ...
+
+### Conditionals
+
+The `t-if` directive is useful to conditionally render something. It evaluates
+the expression given as attribute value, and then acts accordingly.
+
+```xml
+<div>
+    <t t-if="condition">
+        <p>ok</p>
+    </t>
+</div>
+```
+
+The element is rendered if the condition (evaluated with the current rendering
+context) is true:
+
+```xml
+<div>
+    <p>ok</p>
+</div>
+```
+
+but if the condition is false it is removed from the result:
+
+```xml
+<div>
+</div>
+```
+
+The conditional rendering applies to the bearer of the directive, which does not
+have to be `<t>`:
+
+```xml
+<div>
+    <p t-if="condition">ok</p>
+</div>
+```
+
+will give the same results as the previous example.
+
+Extra conditional branching directives `t-elif` and `t-else` are also available:
+
+```xml
+<div>
+    <p t-if="user.birthday == today()">Happy bithday!</p>
+    <p t-elif="user.login == 'root'">Welcome master!</p>
+    <p t-else="">Welcome!</p>
+</div>
+```
+
+### Dynamic Attributes
+
+One can use the `t-att-` directive to add dynamic attributes. Its main use is to
+evaluate an expression (at rendering time) and bind an attribute to its result:
+
+For example, if we have `id` set to 32 in the rendering context,
+
+```xml
+<div t-att-data-action-id="id"/> <!-- result: <div data-action-id="32"></div> -->
+```
+
+If an expression evaluates to a falsy value, it will not be set at all:
+
+```xml
+<div t-att-foo="false"/>  <!-- result: <div></div> -->
+```
+
+It is sometimes convenient to format an attribute with string interpolation. In
+that case, the `t-attf-` directive can be used. It is useful when we need to mix
+literal and dynamic elements, such as css classes.
+
+```xml
+<div t-attf-foo="a {{value1}} is {{value2}} of {{value3}} ]"/>
+<!-- result if values are set to 1,2 and 3: <div foo="a 0 is 1 of 2 ]"></div> -->
+```
+
+If we need completely dynamic attribute names, then there is an additional
+directive: `t-att`, which takes either an object (with keys mapping to their
+values) or a pair `[key, value]`. For example:
+
+```xml
+<div t-att="{'a': 1, 'b': 2}"/> <!-- result: <div a="1" b="2"></div> -->
+
+<div t-att="['a', 'b']"/> <!-- <div a="b"></div> -->
+```
+
+### Loops
+
+QWeb has an iteration directive `t-foreach` which take an expression returning the
+collection to iterate on, and a second parameter `t-as` providing the name to use
+for the current item of the iteration:
+
+```xml
+<t t-foreach="[1, 2, 3]" t-as="i">
+    <p><t t-esc="i"/></p>
+</t>
+```
+
+will be rendered as:
+
+```xml
+<p>1</p>
+<p>2</p>
+<p>3</p>
+```
+
+Like conditions, `t-foreach` applies to the element bearing the directive’s attribute, and
+
+```xml
+<p t-foreach="[1, 2, 3]" t-as="i">
+    <t t-esc="i"/>
+</p>
+```
+
+is equivalent to the previous example.
+
+`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
+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 `$as` for lists and
+  integers, but for objects, it provides the value (where `$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 `$as_index == 0`)
+- `$as_last`: whether the current item is the last of the iteration
+  (equivalent to `$as_index + 1 == $as_size`), requires the iteratee’s size be
+  available
+
+These extra variables provided and all new variables created into the `t-foreach`
+are only available in the scope of the `t-foreach`. If the variable exists outside
+the context of the `t-foreach`, the value is copied at the end of the foreach
+into the global context.
+
+```xml
+<t t-set="existing_variable" t-value="false"/>
+<!-- existing_variable now False -->
+
+<p t-foreach="Array(3)" t-as="i">
+    <t t-set="existing_variable" t-value="true"/>
+    <t t-set="new_variable" t-value="true"/>
+    <!-- existing_variable and new_variable now true -->
+</p>
+
+<!-- existing_variable always true -->
+<!-- new_variable undefined -->
+```
+
+Even though Owl tries to be as declarative as possible, the DOM does not fully
+expose its state declaratively in the DOM tree. For example, the scrolling state,
+the current user selection, the focused element or the state of an input are not
+set as attribute in the DOM tree. This is why we use a virtual dom
+algorithm to keep the actual DOM node as much as possible.
+
+However, in some situations, this is not enough, and we need to help Owl decide
+if an element is actually the same, or is a different element with the same
+properties.
+
+Consider the following situation: we have a list of two items `[{text: "a"}, {text: "b"}]`
+and we render them in this template:
+
+```xml
+<p t-foreach="items" t-as="item"><t t-esc="item.text"/></p>
+```
+
+The result will be two `<p>` tags with text `a` and `b`. Now, if we swap them,
+and rerender the template, Owl needs to know what the intent is:
+
+- should Owl actually swap the DOM nodes,
+- or should it keep the DOM nodes, but with an updated text content?
+
+This might look trivial, but it actually matters. These two possibilities lead
+to different results in some cases. For example, if the user selected the text
+of the first `p`, swapping them will keep the selection while updating the
+text content will not.
+
+There are many other cases where this is important: `input` tags with their
+value, css classes and animations, scroll position...
+
+So, the `t-key` directive is used to give an identity to an element. It allows
+Owl to understand if different elements of a list are actually different or not.
+
+The above example could be modified by adding an ID: `[{id: 1, text: "a"}, {id: 2, text: "b"}]`.
+Then, the template could look like this:
+
+```xml
+<p t-foreach="items" t-as="item" t-key="item.id"><t t-esc="item.text"/></p>
+```
+
+The `t-key` directive is useful for lists (`t-foreach`). A key should be
+a unique number or string (objects will not work: they will be cast to the
+`"[object Object]"` string, which is obviously not unique).
+
+Also, the key can be set on a `t` tag or on its children. The following variations
+are all equivalent:
+
+```xml
+<p t-foreach="items" t-as="item" t-key="item.id">
+  <t t-esc="item.text"/>
+</p>
+
+<t t-foreach="items" t-as="item" t-key="item.id">
+  <p t-esc="item.text"/>
+</t>
+
+<t t-foreach="items" t-as="item">
+  <p t-key="item.id" t-esc="item.text"/>
+</t>
+```
+
+If there is no `t-key` directive, Owl will use the index as a default key.
+
+### Rendering Sub Templates
+
+QWeb templates can be used for top level rendering, but they can also be used
+from within another template (to avoid duplication or give names to parts of
+templates), using the `t-call` directive:
+
+```xml
+<div t-name="other-template">
+    <p><t t-value="var"/></p>
+</div>
+
+<div t-name="main-template">
+    <t t-set="var" t-value="owl"/>
+    <t t-call="other-template"/>
+</div>
+```
+
+will be rendered as `<div><p>owl</p></div>`. This example shows that the sub
+template is rendered with the execution context of the parent. The sub template
+is actually inlined in the main template, but in a sub scope: variables defined
+in the sub template do not escape.
+
+Sometimes, one might want to pass information to the sub template. In that case,
+the content of the body of the `t-call` directive is available as a special
+magic variable `0`:
+
+```xml
+<t t-name="other-template">
+    This template was called with content:
+    <t t-raw="0"/>
+</t>
+
+<div t-name="main-template">
+    <t t-call="other-template">
+        <em>content</em>
+    </t>
+</div>
+```
+
+will result in :
+
+```xml
+<div>
+    This template was called with content:
+    <em>content</em>
+</div>
+```
+
+This can be used to define variables scoped to a sub template:
+
+```xml
+<t t-call="other-template">
+    <t t-set="var" t-value="1"/>
+</t>
+<!-- "var" does not exist here -->
+```
+
+### Translations
+
+By default, QWeb specify that templates should be translated. If this behaviour
+is not wanted, there is a `t-translation` directive which can turn off
+translations (if it is set to the `off` value), with the following rules:
+
+- each text node will be replaced with its translation,
+- each of the following attribute values will be translated as well: `title`,
+  `placeholder`, `label` and `alt`,
+- translating text nodes can be disabled with the special attribute `t-translation`,
+  if its value is `off`.
+
+See [here](qweb_engine.md#translations) for more information on how to setup a
+translate function in Owl QWeb.
+
+### Debugging
+
+The javascript QWeb implementation provides two useful debugging directives:
+
+`t-debug` adds a debugger statement during template rendering:
+
+```xml
+<t t-if="a_test">
+    <t t-debug=""/>
+</t>
+```
+
+will stop execution if the browser dev tools are open.
+
+`t-log` takes an expression parameter, evaluates the expression during rendering and logs its result with console.log:
+
+```xml
+<t t-set="foo" t-value="42"/>
+<t t-log="foo"/>
+```
+
+will print 42 to the console.

doc/reference/router.md

@@ -0,0 +1,181 @@
+# 🦉 Router 🦉
+
+## Content
+
+- [Overview](#overview)
+- [Example](#example)
+- [Reference](#reference)
+  - [Route Definition](#route-definition)
+  - [Router](#router)
+  - [Navigation Guards](#navigation-guards)
+  - [RouteComponent](#routecomponent)
+  - [Link](#link)
+
+## Overview
+
+It is often useful to organize an application around urls. If the application is
+a single page application, then we need a way to manage those urls in the browser.
+This is why there are many different routers for different frameworks. A generic
+router can do the job just fine, but a specialized router for Owl can give a
+better developer experience.
+
+The Owl router support the following features:
+
+- `history` or `hash` mode
+- declarative routes
+- route redirection
+- navigation guards
+- parameterized routes
+- a `<Link/>` component
+- a `<RouteComponent/>` component
+
+Note that it is still in early stage of developments, and there are probably
+still some issues.
+
+## Example
+
+To use the Owl router, there are some steps that needs to be done:
+
+- declare some routes
+- create a router
+- add it to the environment
+
+```js
+async function protectRoute({ env, to }) {
+  if (!env.session.authUser) {
+    env.session.setNextRoute(to.name);
+    return { to: "SIGN_IN" };
+  }
+  return true;
+}
+
+export const ROUTES = [
+  { name: "LANDING", path: "/", component: Landing },
+  { name: "TASK", path: "/tasks/{{id}}", component: Task },
+  { name: "SIGN_UP", path: "/signup", component: SignUp },
+  { name: "SIGN_IN", path: "/signin", component: SignIn },
+  { name: "ADMIN", path: "/admin", component: Admin, beforeRouteEnter: protectRoute },
+  { name: "ACCOUNT", path: "/account", component: Account, beforeRouteEnter: protectRoute },
+  { name: "UNKNOWN", path: "*", redirect: { to: "LANDING" } }
+];
+
+function makeEnvironment() {
+    ...
+    const env = { qweb };
+    env.session = new Session(env);
+    env.router = new owl.router.Router(env, ROUTES);
+    await env.router.start();
+    return env;
+}
+
+App.env = makeEnvironment();
+// create root component here
+```
+
+Notice that the router needs to be started. This is an asynchronous operation
+because it needs to apply the potential navigation guards on the current route
+(which may or may not mean that the application is redirected to another route).
+
+## Reference
+
+### Route definition
+
+A route need to be defined as an object with the following keys:
+
+- `name` (optional): a (unique) string useful to identify the current route. If not
+  given, it will be assigned an automatic name,
+- `path`: a string describing the url. It can be static: `/admin` or dynamic: `/users/{{id}}`.
+  It also can be `*`, to catch all remaining routes.
+- `component` (optional): an Owl component that will be used by the `t-routecomponent`
+  directive if the route is active
+- `redirect` (optional): should be destination object (with optional keys `path`, `to` and `params`) if given, the application will be redirected to the destination whenever we match this route
+- `beforeRouteEnter`: defines a [navigation guard](#navigation-guards).
+
+### `Router`
+
+The `Router` constructor takes three arguments:
+
+- `env`: a valid environment,
+- a list of routes,
+- an optional object (with the only key `mode` which can be `history` (default
+  value) or `hash`).
+
+`history` will use the browser [History API](https://developer.mozilla.org/en-US/docs/Web/API/History_API) as the mechanism to manage URL.\
+Example: `https://yourdomain.tld/my_custom_route`.\
+For this mechanism to work, you need a way to configure your web server accordingly.
+
+`hash` will manipulate the hash of the URL.\
+Example: `https://yourdomain.tld/index.html#/my_custom_route`.
+
+```js
+const ROUTES = [...];
+const router = new owl.router.Router(env, ROUTES, {mode: 'history'});
+```
+
+Note that the route are defined in a list, and the order matters: the router
+tries to find a match by going down the list.
+
+The router needs to be added to the environment in the `router` sub key.
+
+Once a router is created, it needs to be started. This is necessary to initialize
+its current state to the current URL (and also, to potentially apply any
+navigation guards and/or redirecting).
+
+```js
+await router.start();
+```
+
+Once started, the router will keep track of the current url and reflect its
+value in two keys:
+
+- `router.currentRoute`
+- `router.currentParams`
+
+The router also has a `navigate` method, useful to programmatically change the
+application to another state (and the url):
+
+```js
+router.navigate({ to: "USER", params: { id: 51 } });
+```
+
+### Navigation Guards
+
+Navigation guards are very useful to be able to execute some business logic/
+perform some actions or redirect to other routes whenever the application is
+entering a new route. For example, the following guard checks if there is an
+authenticated user, and if it is not the case, redirect to the sign in route.
+
+```js
+async function protectRoute({ env, to }) {
+  if (!env.session.authUser) {
+    env.session.setNextRoute(to.name);
+    return { to: "SIGN_IN" };
+  }
+  return true;
+}
+```
+
+A navigation guard is a function that returns a promise, which either resolves
+to `true` (the navigation is accepted), or to another destination object.
+
+### `RouteComponent`
+
+The `RouteComponent` component directs Owl to render the component associated
+to the currently active route (if any):
+
+```xml
+<div t-name="App">
+    <NavBar />
+    <RouteComponent />
+</div>
+```
+
+### `Link`
+
+The `Link` component is a Owl component which render as a `<a>` tag with any
+content. It will compute the proper href from its props, and allow Owl to
+properly navigate to a given url if clicked on it.
+
+```xml
+<Link to="'HOME'">Home</Link>
+```

doc/reference/slots.md

@@ -0,0 +1,96 @@
+# 🦉 Slots 🦉
+
+## Content
+
+- [Overview](#overview)
+- [Example](#example)
+- [Reference](#reference)
+
+## Overview
+
+Owl is a template based component system. There is therefore a need to be able
+to make generic components. For example, imagine a generic `Dialog`
+component, which is able to display some arbitrary content.
+
+Obviously, we want to use this component everywhere in our application, to
+display various different content. The `Dialog` component is technically the
+owner of its content, but is only a container. The user of the `Dialog` is
+the component that want to _inject_ something inside the `Dialog`. This is
+exactly what slots are for.
+
+## Example
+
+To make generic components, it is useful to be able for a parent component to _inject_
+some sub template, but still be the owner. For example, a generic dialog component
+will need to render some content, some footer, but with the parent as the
+rendering context.
+
+```xml
+<div t-name="Dialog" class="modal">
+  <div class="modal-title"><t t-esc="props.title"/></div>
+  <div class="modal-content">
+    <t t-slot="content"/>
+  </div>
+  <div class="modal-footer">
+    <t t-slot="footer"/>
+  </div>
+</div>
+```
+
+Slots are defined by the caller, with the `t-set-slot` directive:
+
+```xml
+<div t-name="SomeComponent">
+  <div>some component</div>
+  <Dialog title="Some Dialog">
+    <t t-set-slot="content">
+      <div>hey</div>
+    </t>
+    <t t-set-slot="footer">
+      <button t-on-click="doSomething">ok</button>
+    </t>
+  </Dialog>
+</div>
+```
+
+In this example, the component `Dialog` will render the slots `content` and `footer`
+with its parent as rendering context. This means that clicking on the button
+will execute the `doSomething` method on the parent, not on the dialog.
+
+Note: Owl previously used the `t-set` directive to define the content of a slot.
+This is deprecated and should no longer be used in new code.
+
+## Reference
+
+Default slot: the first element inside the component which is not a named slot will
+be considered the `default` slot. For example:
+
+```xml
+<div t-name="Parent">
+  <Child>
+    <span>some content</span>
+  </Child>
+</div>
+
+<div t-name="Child">
+  <t t-slot="default"/>
+</div>
+```
+
+Default content: slots can define a default content, in case the parent did not define them:
+
+```xml
+<div t-name="Parent">
+  <Child/>
+</div>
+
+<span t-name="Child">
+  <t t-slot="default">default content</t>
+</span>
+<!-- will be rendered as: <div><span>default content</span></div> -->
+```
+
+Rendering context: the content of the slots is actually rendered with the
+rendering context corresponding to where it was defined, not where it is
+positioned. This allows the user to define event handlers that will be bound
+to the correct component (usually, the grandparent of the slot content).

doc/reference/store.md

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

doc/reference/tags.md

@@ -0,0 +1,184 @@
+# 🦉 Tags 🦉
+
+## Content
+
+- [Overview](#overview)
+- [`xml` tag](#xml-tag)
+- [`css` tag](#css-tag)
+
+## Overview
+
+Tags are very small helpers intended to make it easy to write inline templates
+or styles. There are currently two tags: `css` and `xml`. With these functions,
+it is possible to write [single file components](../learning/how_to_write_sfc.md).
+
+## XML tag
+
+The `xml` tag is certainly the most useful tag. It is used to define an inline
+QWeb template for a component. Without tags, creating a standalone component
+would look like this:
+
+```js
+import { Component } from 'owl'
+
+const name = 'some-unique-name';
+const template = `
+    <div>
+        <span t-if="somecondition">text</span>
+        <button t-on-click="someMethod">Click</button>
+    </div>
+`;
+QWeb.registerTemplate(name, template);
+
+class MyComponent extends Component {
+    static template = name;
+
+    ...
+}
+```
+
+With tags, this process is slightly simplified. The name is uniquely generated,
+and the template is automatically registered:
+
+```js
+const { Component } = owl;
+const { xml } = owl.tags;
+
+class MyComponent extends Component {
+    static template = xml`
+        <div>
+            <span t-if="somecondition">text</span>
+            <button t-on-click="someMethod">Click</button>
+        </div>
+    `;
+
+    ...
+}
+```
+
+## CSS tag
+
+The CSS tag is useful to define a css stylesheet in the javascript file:
+
+```js
+class MyComponent extends Component {
+    static template = xml`
+        <div class="my-component">some template</div>
+    `;
+    static css`
+      .my-component {
+          color: red;
+      }
+    `;
+}
+```
+
+The `css` tag registers internally the css information. Then, whenever the first
+instance of the component is created, will add a `<style>` tag to the document
+`<head>`.
+
+Note that to make it more useful, like other css preprocessors, the `css` tag
+accepts a small extension of the css specification: css scopes can be nested,
+and the rules will then be expanded by the `css` helper:
+
+```scss
+.my-component {
+  display: block;
+  .sub-component h {
+    color: red;
+  }
+}
+```
+
+will be formatted as:
+
+```css
+.my-component {
+  display: block;
+}
+.my-component .sub-component h {
+  color: red;
+}
+```
+
+This extension brings another useful feature: the `&` selector which refers to
+the parent selector. For example, we want our component to be red when hovered.
+We would like to write something like:
+
+```scss
+.my-component {
+  display: block;
+  :hover {
+    color: red;
+  }
+}
+```
+
+but it will be formatted as:
+
+```css
+.my-component {
+  display: block;
+}
+.my-component :hover {
+  color: red;
+}
+```
+
+The `&` selector can be used to solve this problem:
+
+```scss
+.my-component {
+  display: block;
+  &:hover {
+    color: red;
+  }
+}
+```
+
+will be formatted as:
+
+```css
+.my-component {
+  display: block;
+}
+.my-component:hover {
+  color: red;
+}
+```
+
+Now, there is no additional processing done by the `css` tag. However, since it
+is done in javascript at runtime, we actually have more power. For example:
+
+1. sharing values between javascript and css:
+
+```js
+import { theme } from "./theme";
+
+class MyComponent extends Component {
+  static template = xml`<div class="my-component">...</div>`;
+  static style = css`
+    .my-component {
+      color: ${theme.MAIN_COLOR};
+      background-color: ${theme.SECONDARY_color};
+    }
+  `;
+}
+```
+
+2. scoping rules to the current component:
+
+```js
+import { generateUUID } from "./utils";
+
+const uuid = generateUUID();
+
+class MyComponent extends Component {
+  static template = xml`<div data-o-${uuid}="">...</div>`;
+  static style = css`
+        [data-o-${uuid}] {
+            color: red;
+        }
+    `;
+}
+```

doc/reference/utils.md

@@ -0,0 +1,148 @@
+# 🦉 Utils 🦉
+
+Owl export a few useful utility functions, to help with common issues. Those
+functions are all available in the `owl.utils` namespace.
+
+## Content
+
+- [`whenReady`](#whenready): executing code when DOM is ready
+- [`loadJS`](#loadjs): loading script files
+- [`loadFile`](#loadfile): loading a file (useful for templates)
+- [`escape`](#escape): sanitizing strings
+- [`debounce`](#debounce): limiting rate of function calls
+- [`shallowEqual`](#shallowequal): shallow object comparison
+
+## `whenReady`
+
+The function `whenReady` returns a `Promise` resolved when the DOM is ready (if
+not ready yet, resolved directly otherwise). If called with a callback as
+argument, it executes it as soon as the DOM ready (or directly).
+
+```js
+Promise.all([loadFile("templates.xml"), owl.utils.whenReady()]).then(function ([templates]) {
+  const qweb = new owl.QWeb({ templates });
+  const app = new App({ qweb });
+  app.mount(document.body);
+});
+```
+
+or alternatively:
+
+```js
+owl.utils.whenReady(function () {
+  const qweb = new owl.QWeb();
+  const app = new App({ qweb });
+  app.mount(document.body);
+});
+```
+
+## `loadJS`
+
+`loadJS` takes a url (string) for a javascript resource, and loads it (by adding
+a script tag in the document head). It returns a promise, so the caller can
+properly reacts when it is ready. Also, it is smart: it maintains a list of urls
+previously loaded (or currently being loaded), and prevent doing twice the work.
+
+For example, it is useful for lazy loading external libraries:
+
+```js
+class MyComponent extends owl.Component {
+  willStart() {
+    return owl.utils.loadJS("/static/libs/someLib.js");
+  }
+}
+```
+
+## `loadFile`
+
+`loadFile` is a helper function to fetch a file. It simply
+performs a `GET` request and returns the resulting string in a promise. The
+initial usecase for this function is to load a template file. For example:
+
+```js
+async function makeEnv() {
+  const templates = await owl.utils.loadFile("templates.xml");
+  const qweb = new owl.QWeb({ templates });
+  return { qweb };
+}
+```
+
+Note that unlike `loadJS`, this function returns the content of the file as a
+string. It does not add a `script` tag or any other side effect.
+
+## `escape`
+
+Sometimes, we need to display dynamic data (for example user-generated data) in
+the user interface. If this is done by a `QWeb` template, it is not an issue:
+
+```xml
+    <div><t t-esc="user.data"/></div>
+```
+
+The `QWeb` engine will create a `div` node and add the content of the `user.data`
+string as a text node, so the web browser will not parse it as html. However,
+it may be a problem if this is done with some javascript code like this:
+
+```js
+class BadComponent extends Component {
+  // some template with a ref to a div
+  // some code ...
+
+  mounted() {
+    this.divRef.el.innerHTML = this.state.value;
+  }
+}
+```
+
+In this case, the content of the `div` will be parsed as html, which may inject
+unwanted behaviour. To fix this, the `escape` function will simply transform a
+string into an escaped version of the same string, which will be properly displayed
+by the browser, but which will not be parsed as html (for example, `"<ok>"` is
+escaped to the string: `"&lt;ok&gt;"`). So, the bad example above can be fixed
+with the following change:
+
+```js
+this.divRef.el.innerHTML = owl.utils.escape(this.state.value);
+```
+
+## `debounce`
+
+The `debounce` function is useful when we want to limit the number of times some
+function/action is perfomed. For example, this may be useful to prevent issue
+with people double clicking on a button.
+
+It takes three arguments:
+
+- `func` (function): this is the function that will be rate limited
+- `wait` (number): this is the number of milliseconds that we want to use to
+  rate limit the function `func`
+- `immediate` (optional, boolean, default=false): if `immediate` is true, the
+  function will be triggered immediately (leading edge of the interval). If false,
+  the function will be triggered at the end (trailing edge).
+
+It returns a function. For example:
+
+```js
+const debounce = owl.utils.debounce;
+window.addEventListener("mousemove", debounce(doSomething, 100));
+```
+
+As this example shows, it is usualy useful for event handlers which are triggered
+very quickly, such as `scroll` or `mousemove` events.
+
+## `shallowEqual`
+
+This function checks if two objects have the same values assigned to each keys:
+
+```js
+shallowEqual({ a: 1, b: 2 }, { a: 1, b: 2 }); // true
+shallowEqual({ a: 1, b: 2 }, { a: 1, b: 3 }); // false
+```
+
+However, for performance reasons, it assumes that the two objects have the same
+keys. If we are in a situation where this is not guaranteed, the following code
+will work:
+
+```js
+const completeShallowEqual = (a, b) => shallowEqual(a, b) && shallowEqual(b, a);
+```

doc/state_management.md

@@ -1,8 +0,0 @@
-# OWL: State Management
-
-Managing the state in an application is not an easy task. Many different
-architectures/designs/systems/... have been created. We propose here to use
-the idea of a central store.
-
-- Store
-- connect

doc/tutorial.md

@@ -1,3 +0,0 @@
-# Tutorial
-
-todo...

examples/benchmarks/app.css

@@ -1,45 +0,0 @@
-.main {
-  position: absolute;
-  left: 0;
-  right: 0;
-  top: 0;
-  bottom: 0;
-
-  display: grid;
-  grid-template-columns: 200px 1fr;
-}
-
-.left-thing {
-  background-color: gray;
-  padding: 20px;
-}
-
-.left-thing button {
-  width: 100%;
-}
-
-.left-thing .counter span {
-  color: white;
-}
-
-.left-thing .counter button {
-  width: 40px;
-}
-
-.right-thing {
-  padding: 20px;
-  overflow: auto;
-}
-
-/* Message widget */
-.message .author {
-  font-weight: bold;
-}
-
-.message {
-  width: 400px;
-  background-color: lightblue;
-  margin: 10px 5px;
-  border-radius: 5px;
-  padding: 5px;
-}

examples/benchmarks/app.js

@@ -1,51 +0,0 @@
-import { Message } from "./message.js";
-import { messages } from "./data.js";
-
-const template = `
-    <div class="main">
-        <div class="left-thing">
-            <div class="counter">
-                <button t-on-click="increment(-1)">-</button>
-                <span style="font-weight:bold">Value: <t t-esc="state.messages.length"/></span>
-                <button t-on-click="increment(1)">+</button>
-            </div>
-            <button t-on-click="setMessageCount(10)">10 messages</button>
-            <button t-on-click="setMessageCount(20)">20 messages</button>
-            <button t-on-click="setMessageCount(500)">500 messages</button>
-            <button t-on-click="setMessageCount(1000)">1000 messages</button>
-            <button t-on-click="setMessageCount(5000)">5000 messages</button>
-            <button t-on-click="setMessageCount(15000)">15000 messages</button>
-        </div>
-        <div class="right-thing">
-            <div class="content">
-                <t t-foreach="state.messages" t-as="message">
-                    <t t-widget="Message" t-att-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
-                </t>
-            </div>
-        </div>
-    </div>`;
-
-export class App extends owl.Component {
-  constructor(parent, props) {
-    super(parent, props);
-    this.inlineTemplate = template;
-    this.widgets = { Message };
-    this.state = {
-      messages: messages.slice(0, 10)
-    };
-  }
-
-  setMessageCount(n) {
-    this.state.messages = messages.slice(0, n);
-  }
-
-  removeMessage(data) {
-    const index = messages.findIndex(m => m.id === data.id);
-    this.state.messages.splice(index, 1);
-  }
-
-  increment(delta) {
-    const n = this.state.messages.length + delta;
-    this.setMessageCount(n);
-  }
-}

examples/benchmarks/counter.js

@@ -1,18 +0,0 @@
-export class Counter extends owl.Component {
-  inlineTemplate = `
-    <div>
-      <button t-on-click="increment(-1)">-</button>
-      <span style="font-weight:bold">Value: <t t-esc="state.counter"/></span>
-      <button t-on-click="increment(1)">+</button>
-    </div>`;
-  constructor(parent, props) {
-    super(parent, props);
-    this.state = {
-      counter: props.initialState || 0
-    };
-  }
-
-  increment(delta) {
-    this.state.counter += delta;
-  }
-}

examples/benchmarks/data.js

@@ -1,22 +0,0 @@
-export const messages = [];
-
-const authors = ["Aaron", "David", "Vincent"];
-const content = [
-  "Lorem ipsum dolor sit amet",
-  "Sed ut perspiciatis unde omnis iste natus error sit voluptatem",
-  "Excepteur sint occaecat cupidatat non proident"
-];
-
-function chooseRandomly(array) {
-  const index = Math.floor(Math.random() * array.length);
-  return array[index];
-}
-
-for (let i = 1; i < 16000; i++) {
-  messages.push({
-    id: i,
-    author: chooseRandomly(authors),
-    msg: `${i}: ${chooseRandomly(content)}`,
-    likes: 0
-  });
-}

examples/benchmarks/index.html

@@ -1,16 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <meta charset="utf-8">
-    <title>Odoo WebCore Benchmarks App</title>
-    <link rel="icon" href="data:,">
-
-    <!-- Application JS/CSS -->
-    <script src="/owl.js"></script>
-    <link rel="stylesheet" href="/app.css">
-    <script type="module" src="/main.js"></script>
-
-  </head>
-  <body>
-  </body>
-</html>

examples/benchmarks/main.js

@@ -1,13 +0,0 @@
-import { App } from "./app.js";
-
-function createApp(el) {
-  const env = {
-    qweb: new owl.QWeb()
-  };
-  const app = new App(env, { initialState: 13 });
-  app.mount(el);
-}
-
-document.addEventListener("DOMContentLoaded", function() {
-  createApp(document.body);
-});

examples/benchmarks/message.js

@@ -1,22 +0,0 @@
-import { Counter } from "./counter.js";
-
-export class Message extends owl.Component {
-  inlineTemplate = `
-    <div class="message">
-        <span class="author"><t t-esc="props.author"/></span>
-        <span class="msg"><t t-esc="props.msg"/></span>
-        <button class="remove" t-on-click="removeMessage">Remove</button>
-        <t t-widget="Counter" t-props="{initialState: props.id}"/>
-    </div>`;
-
-  constructor(parent, props) {
-    super(parent, props);
-    this.widgets = { Counter };
-  }
-
-  removeMessage() {
-    this.trigger("remove_message", {
-      id: this.props.id
-    });
-  }
-}

examples/readme.md

@@ -1,32 +0,0 @@
-# Examples
-
-This project features three example to illustrate how to work with the web-core framework:
-
-- _benchmarks_ is a small application to test large number of widgets,
-- _todoapp_ is the classical todo application (from the todomvc project),
-
-## Benchmarks
-
-This example is just a playground to experiment/showcase some features of the framework, with large number of widgets.
-
-```
-npm run example:benchmarks:build # make a build in dist/examples/
-npm run example:benchmarks:dev   # make a build in dist/examples/, and make a live server to access it
-```
-
-The benchmarks application generates a large number of demo messages, and display them in a list, with a few buttons that can
-be used to alter the number of visible widgets.
-
-Note that each message is itself a widget, with a sub widget. This
-example could be made faster (by not using subwidgets), but the point is to observe/measure the overhead of the Component class.
-
-## Todo App
-
-The Todo App is the classical todo application from _http://todomvc.com/_. It is a good mini application with non trivial data structures and interface updates.
-
-```
-npm run example:todoapp:build # make a build in dist/examples/
-npm run example:todoapp:dev   # make a build in dist/examples/, and make a live server to access it
-```
-
-It is implemented with the Store class (as in redux/vuex).

examples/todoapp/TodoApp.js

@@ -1,63 +0,0 @@
-import { TodoItem } from "./TodoItem.js";
-
-const { Component, connect } = owl;
-
-const ENTER_KEY = 13;
-
-function mapStateToProps(state) {
-  return { todos: state.todos };
-}
-
-class TodoApp extends Component {
-  template = "todoapp";
-  widgets = { TodoItem };
-  state = { filter: "all" };
-
-  get visibleTodos() {
-    let todos = this.props.todos;
-    if (this.state.filter === "active") {
-      todos = todos.filter(t => !t.completed);
-    }
-    if (this.state.filter === "completed") {
-      todos = todos.filter(t => t.completed);
-    }
-    return todos;
-  }
-
-  get allChecked() {
-    return this.props.todos.every(todo => todo.completed);
-  }
-
-  get remaining() {
-    return this.props.todos.filter(todo => !todo.completed).length;
-  }
-
-  get remainingText() {
-    const items = this.remaining < 2 ? "item" : "items";
-    return ` ${items} left`;
-  }
-
-  addTodo(ev) {
-    if (ev.keyCode === ENTER_KEY) {
-      const title = ev.target.value;
-      if (title.trim()) {
-        this.env.store.dispatch("addTodo", title);
-      }
-      ev.target.value = "";
-    }
-  }
-
-  clearCompleted() {
-    this.env.store.dispatch("clearCompleted");
-  }
-
-  toggleAll() {
-    this.env.store.dispatch("toggleAll", !this.allChecked);
-  }
-
-  setFilter(filter) {
-    this.state.filter = filter;
-  }
-}
-
-export default connect(mapStateToProps)(TodoApp);

examples/todoapp/TodoItem.js

@@ -1,51 +0,0 @@
-const ENTER_KEY = 13;
-const ESC_KEY = 27;
-
-export class TodoItem extends owl.Component {
-  template = "todoitem";
-
-  state = { isEditing: false };
-
-  removeTodo() {
-    this.env.store.dispatch("removeTodo", this.props.id);
-  }
-
-  toggleTodo() {
-    this.env.store.dispatch("toggleTodo", this.props.id);
-  }
-
-  async editTodo() {
-    this.state.isEditing = true;
-    setTimeout(() => {
-      this.refs.input.value = "";
-      this.refs.input.focus();
-      this.refs.input.value = this.props.title;
-    });
-  }
-
-  handleKeyup(ev) {
-    if (ev.keyCode === ENTER_KEY) {
-      this.updateTitle(ev.target.value);
-    }
-    if (ev.keyCode === ESC_KEY) {
-      ev.target.value = this.props.title;
-      this.state.isEditing = false;
-    }
-  }
-
-  handleBlur(ev) {
-    this.updateTitle(ev.target.value);
-  }
-  updateTitle(title) {
-    const value = title.trim();
-    if (!value) {
-      this.removeTodo(this.props.id);
-    } else {
-      this.env.store.dispatch("editTodo", {
-        id: this.props.id,
-        title: value
-      });
-      this.state.isEditing = false;
-    }
-  }
-}

examples/todoapp/app.css

@@ -1,376 +0,0 @@
-html,
-body {
-  margin: 0;
-  padding: 0;
-}
-
-button {
-  margin: 0;
-  padding: 0;
-  border: 0;
-  background: none;
-  font-size: 100%;
-  vertical-align: baseline;
-  font-family: inherit;
-  font-weight: inherit;
-  color: inherit;
-  -webkit-appearance: none;
-  appearance: none;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-}
-
-body {
-  font: 14px "Helvetica Neue", Helvetica, Arial, sans-serif;
-  line-height: 1.4em;
-  background: #f5f5f5;
-  color: #4d4d4d;
-  min-width: 230px;
-  max-width: 550px;
-  margin: 0 auto;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-  font-weight: 300;
-}
-
-:focus {
-  outline: 0;
-}
-
-.hidden {
-  display: none;
-}
-
-.todoapp {
-  background: #fff;
-  margin: 130px 0 40px 0;
-  position: relative;
-  box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.2), 0 25px 50px 0 rgba(0, 0, 0, 0.1);
-}
-
-.todoapp input::-webkit-input-placeholder {
-  font-style: italic;
-  font-weight: 300;
-  color: #e6e6e6;
-}
-
-.todoapp input::-moz-placeholder {
-  font-style: italic;
-  font-weight: 300;
-  color: #e6e6e6;
-}
-
-.todoapp input::input-placeholder {
-  font-style: italic;
-  font-weight: 300;
-  color: #e6e6e6;
-}
-
-.todoapp h1 {
-  position: absolute;
-  top: -155px;
-  width: 100%;
-  font-size: 100px;
-  font-weight: 100;
-  text-align: center;
-  color: rgba(175, 47, 47, 0.15);
-  -webkit-text-rendering: optimizeLegibility;
-  -moz-text-rendering: optimizeLegibility;
-  text-rendering: optimizeLegibility;
-}
-
-.new-todo,
-.edit {
-  position: relative;
-  margin: 0;
-  width: 100%;
-  font-size: 24px;
-  font-family: inherit;
-  font-weight: inherit;
-  line-height: 1.4em;
-  border: 0;
-  color: inherit;
-  padding: 6px;
-  border: 1px solid #999;
-  box-shadow: inset 0 -1px 5px 0 rgba(0, 0, 0, 0.2);
-  box-sizing: border-box;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-}
-
-.new-todo {
-  padding: 16px 16px 16px 60px;
-  border: none;
-  background: rgba(0, 0, 0, 0.003);
-  box-shadow: inset 0 -2px 1px rgba(0, 0, 0, 0.03);
-}
-
-.main {
-  position: relative;
-  z-index: 2;
-  border-top: 1px solid #e6e6e6;
-}
-
-.toggle-all {
-  width: 1px;
-  height: 1px;
-  border: none; /* Mobile Safari */
-  opacity: 0;
-  position: absolute;
-  right: 100%;
-  bottom: 100%;
-}
-
-.toggle-all + label {
-  width: 60px;
-  height: 34px;
-  font-size: 0;
-  position: absolute;
-  top: -52px;
-  left: -13px;
-  -webkit-transform: rotate(90deg);
-  transform: rotate(90deg);
-}
-
-.toggle-all + label:before {
-  content: "❯";
-  font-size: 22px;
-  color: #e6e6e6;
-  padding: 10px 27px 10px 27px;
-}
-
-.toggle-all:checked + label:before {
-  color: #737373;
-}
-
-.todo-list {
-  margin: 0;
-  padding: 0;
-  list-style: none;
-}
-
-.todo-list li {
-  position: relative;
-  font-size: 24px;
-  border-bottom: 1px solid #ededed;
-}
-
-.todo-list li:last-child {
-  border-bottom: none;
-}
-
-.todo-list li.editing {
-  border-bottom: none;
-  padding: 0;
-}
-
-.todo-list li.editing .edit {
-  display: block;
-  width: calc(100% - 43px);
-  padding: 12px 16px;
-  margin: 0 0 0 43px;
-}
-
-.todo-list li.editing .view {
-  display: none;
-}
-
-.todo-list li .toggle {
-  text-align: center;
-  width: 40px;
-  /* auto, since non-WebKit browsers doesn't support input styling */
-  height: auto;
-  position: absolute;
-  top: 0;
-  bottom: 0;
-  margin: auto 0;
-  border: none; /* Mobile Safari */
-  -webkit-appearance: none;
-  appearance: none;
-}
-
-.todo-list li .toggle {
-  opacity: 0;
-}
-
-.todo-list li .toggle + label {
-  /*
-		Firefox requires `#` to be escaped - https://bugzilla.mozilla.org/show_bug.cgi?id=922433
-		IE and Edge requires *everything* to be escaped to render, so we do that instead of just the `#` - https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/7157459/
-	*/
-  background-image: url("data:image/svg+xml;utf8,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%2240%22%20height%3D%2240%22%20viewBox%3D%22-10%20-18%20100%20135%22%3E%3Ccircle%20cx%3D%2250%22%20cy%3D%2250%22%20r%3D%2250%22%20fill%3D%22none%22%20stroke%3D%22%23ededed%22%20stroke-width%3D%223%22/%3E%3C/svg%3E");
-  background-repeat: no-repeat;
-  background-position: center left;
-}
-
-.todo-list li .toggle:checked + label {
-  background-image: url("data:image/svg+xml;utf8,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%2240%22%20height%3D%2240%22%20viewBox%3D%22-10%20-18%20100%20135%22%3E%3Ccircle%20cx%3D%2250%22%20cy%3D%2250%22%20r%3D%2250%22%20fill%3D%22none%22%20stroke%3D%22%23bddad5%22%20stroke-width%3D%223%22/%3E%3Cpath%20fill%3D%22%235dc2af%22%20d%3D%22M72%2025L42%2071%2027%2056l-4%204%2020%2020%2034-52z%22/%3E%3C/svg%3E");
-}
-
-.todo-list li label {
-  word-break: break-all;
-  padding: 15px 15px 15px 60px;
-  display: block;
-  line-height: 1.2;
-  transition: color 0.4s;
-}
-
-.todo-list li.completed label {
-  color: #d9d9d9;
-  text-decoration: line-through;
-}
-
-.todo-list li .destroy {
-  display: none;
-  position: absolute;
-  top: 0;
-  right: 10px;
-  bottom: 0;
-  width: 40px;
-  height: 40px;
-  margin: auto 0;
-  font-size: 30px;
-  color: #cc9a9a;
-  margin-bottom: 11px;
-  transition: color 0.2s ease-out;
-}
-
-.todo-list li .destroy:hover {
-  color: #af5b5e;
-}
-
-.todo-list li .destroy:after {
-  content: "×";
-}
-
-.todo-list li:hover .destroy {
-  display: block;
-}
-
-.todo-list li .edit {
-  display: none;
-}
-
-.todo-list li.editing:last-child {
-  margin-bottom: -1px;
-}
-
-.footer {
-  color: #777;
-  padding: 10px 15px;
-  height: 20px;
-  text-align: center;
-  border-top: 1px solid #e6e6e6;
-}
-
-.footer:before {
-  content: "";
-  position: absolute;
-  right: 0;
-  bottom: 0;
-  left: 0;
-  height: 50px;
-  overflow: hidden;
-  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2), 0 8px 0 -3px #f6f6f6,
-    0 9px 1px -3px rgba(0, 0, 0, 0.2), 0 16px 0 -6px #f6f6f6,
-    0 17px 2px -6px rgba(0, 0, 0, 0.2);
-}
-
-.todo-count {
-  float: left;
-  text-align: left;
-}
-
-.todo-count strong {
-  font-weight: 300;
-}
-
-.filters {
-  margin: 0;
-  padding: 0;
-  list-style: none;
-  position: absolute;
-  right: 0;
-  left: 0;
-}
-
-.filters li {
-  display: inline;
-}
-
-.filters li a {
-  color: inherit;
-  margin: 3px;
-  padding: 3px 7px;
-  text-decoration: none;
-  border: 1px solid transparent;
-  border-radius: 3px;
-}
-
-.filters li a:hover {
-  border-color: rgba(175, 47, 47, 0.1);
-}
-
-.filters li a.selected {
-  border-color: rgba(175, 47, 47, 0.2);
-}
-
-.clear-completed,
-html .clear-completed:active {
-  float: right;
-  position: relative;
-  line-height: 20px;
-  text-decoration: none;
-  cursor: pointer;
-}
-
-.clear-completed:hover {
-  text-decoration: underline;
-}
-
-.info {
-  margin: 65px auto 0;
-  color: #bfbfbf;
-  font-size: 10px;
-  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
-  text-align: center;
-}
-
-.info p {
-  line-height: 1;
-}
-
-.info a {
-  color: inherit;
-  text-decoration: none;
-  font-weight: 400;
-}
-
-.info a:hover {
-  text-decoration: underline;
-}
-
-/*
-	Hack to remove background from Mobile Safari.
-	Can't use it globally since it destroys checkboxes in Firefox
-*/
-@media screen and (-webkit-min-device-pixel-ratio: 0) {
-  .toggle-all,
-  .todo-list li .toggle {
-    background: none;
-  }
-
-  .todo-list li .toggle {
-    height: 40px;
-  }
-}
-
-@media (max-width: 430px) {
-  .footer {
-    height: 50px;
-  }
-
-  .filters {
-    bottom: 10px;
-  }
-}

examples/todoapp/index.html

@@ -1,16 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <meta charset="utf-8">
-    <title>Odoo Demo App</title>
-    <link rel="icon" href="data:,">
-
-    <!-- Application JS/CSS -->
-    <script src="/owl.js"></script>
-    <link rel="stylesheet" href="/app.css">
-    <script type="module" src="/main.js"></script>
-
-  </head>
-  <body>
-  </body>
-</html>

examples/todoapp/main.js

@@ -1,26 +0,0 @@
-import TodoApp from "./TodoApp.js";
-import { makeStore } from "./store.js";
-
-async function makeEnv() {
-  const result = await fetch("templates.xml");
-  if (!result.ok) {
-    throw new Error("Error while fetching xml templates");
-  }
-  let templates = await result.text();
-  templates = templates.replace(/<!--[\s\S]*?-->/g, "");
-  const qweb = new owl.QWeb();
-  qweb.loadTemplates(templates);
-  return {
-    qweb,
-    store: makeStore()
-  };
-}
-
-document.addEventListener("DOMContentLoaded", async function() {
-  const env = await makeEnv();
-  const app = new TodoApp(env);
-
-  // for debugging purpose
-  window.app = app;
-  await app.mount(document.body);
-});

examples/todoapp/store.js

@@ -1,75 +0,0 @@
-//------------------------------------------------------------------------------
-// ACTIONS
-//------------------------------------------------------------------------------
-
-const actions = {
-  addTodo({ commit }, title) {
-    commit("addTodo", title);
-  },
-  removeTodo({ commit }, id) {
-    commit("removeTodo", id);
-  },
-  toggleTodo({ state, commit }, id) {
-    const todo = state.todos.find(t => t.id === id);
-    commit("editTodo", { id, completed: !todo.completed });
-  },
-  clearCompleted({ state, commit }) {
-    state.todos
-      .filter(todo => todo.completed)
-      .forEach(todo => {
-        commit("removeTodo", todo.id);
-      });
-  },
-  toggleAll({ state, commit }, completed) {
-    state.todos.forEach(todo => {
-      commit("editTodo", { id: todo.id, completed });
-    });
-  },
-  editTodo({ commit }, { id, title }) {
-    commit("editTodo", { id, title });
-  }
-};
-
-//------------------------------------------------------------------------------
-// MUTATIONS
-//------------------------------------------------------------------------------
-
-const mutations = {
-  addTodo({ state }, title) {
-    const id = state.nextId++;
-    const todo = { id, title, completed: false };
-    state.todos.push(todo);
-  },
-  removeTodo({ state }, id) {
-    const index = state.todos.findIndex(t => t.id === id);
-    state.todos.splice(index, 1);
-  },
-  editTodo({ state }, { id, title, completed }) {
-    const todo = state.todos.find(t => t.id === id);
-    if (title !== undefined) {
-      todo.title = title;
-    }
-    if (completed !== undefined) {
-      todo.completed = completed;
-    }
-  }
-};
-
-//------------------------------------------------------------------------------
-// STORE
-//------------------------------------------------------------------------------
-const LOCALSTORAGE_KEY = "todos-odoo";
-
-export function makeStore() {
-  const todos = JSON.parse(
-    window.localStorage.getItem(LOCALSTORAGE_KEY) || "[]"
-  );
-  const nextId = Math.max(0, ...todos.map(t => t.id || 0)) + 1;
-  const state = { todos, nextId };
-  const store = new owl.Store({ state, actions, mutations });
-  store.on("update", null, () => {
-    const state = JSON.stringify(store.state.todos);
-    window.localStorage.setItem(LOCALSTORAGE_KEY, state);
-  });
-  return store;
-}

examples/todoapp/templates.xml

@@ -1,56 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<templates id="template" xml:space="preserve">
-
-    <section t-name="todoapp" class="todoapp">
-        <!-- header -->
-        <header class="header">
-            <h1>todos</h1>
-            <input class="new-todo" autofocus="true" autocomplete="off" placeholder="What needs to be done?" t-on-keyup="addTodo"/>
-        </header>
-        <!-- main section -->
-        <section class="main" t-if="props.todos.length">
-            <input class="toggle-all" id="toggle-all" type="checkbox" t-att-checked="allChecked" t-on-click="toggleAll"/>
-            <label for="toggle-all"></label>
-            <ul class="todo-list">
-                <t t-foreach="visibleTodos" t-as="todo">
-                    <t t-widget="TodoItem" t-key="todo.id" t-props="todo"/>
-                </t>
-            </ul>
-        </section>
-        <!-- footer -->
-        <footer class="footer" t-if="props.todos.length">
-            <span class="todo-count">
-                <strong>
-                    <t t-esc="remaining"/>
-                </strong>
-                <t t-esc="remainingText"/>
-            </span>
-            <ul class="filters">
-                <li>
-                    <a href="#/all" t-on-click="setFilter('all')" t-att-class="{selected: state.filter === 'all'}">All</a>
-                </li>
-                <li>
-                    <a href="#/active" t-on-click="setFilter('active')" t-att-class="{selected: state.filter === 'active'}">Active</a>
-                </li>
-                <li>
-                    <a href="#/completed" t-on-click="setFilter('completed')" t-att-class="{selected: state.filter === 'completed'}">Completed</a>
-                </li>
-            </ul>
-            <button class="clear-completed" t-if="props.todos.length gt remaining" t-on-click="clearCompleted">
-        Clear completed
-            </button>
-        </footer>
-    </section>
-
-    <li t-name="todoitem" class="todo" t-att-class="{completed: props.completed, editing: state.isEditing}">
-        <div class="view">
-            <input class="toggle" type="checkbox" t-on-change="toggleTodo" t-att-checked="props.completed"/>
-            <label t-on-dblclick="editTodo">
-                <t t-esc="props.title"/>
-            </label>
-            <button class="destroy" t-on-click="removeTodo"></button>
-        </div>
-        <input class="edit" t-ref="'input'" t-if="state.isEditing" t-att-value="props.title" t-on-keyup="handleKeyup" t-on-blur="handleBlur"/>
-    </li>
-
-</templates>

jest.config.js

@@ -1,9 +0,0 @@
-module.exports = {
-  roots: ["<rootDir>/src", "<rootDir>/tests"],
-  transform: {
-    "^.+\\.ts?$": "ts-jest"
-  },
-  verbose: false,
-  testRegex: "(/tests/.*(test|spec))\\.ts?$",
-  moduleFileExtensions: ["ts", "tsx", "js", "jsx", "json", "node"]
-};

libs/snabbdom/.gitignore

@@ -1,64 +0,0 @@
-# Logs
-logs
-*.log
-
-# Runtime data
-pids
-*.pid
-*.seed
-
-# Directory for instrumented libs generated by jscoverage/JSCover
-lib-cov
-
-# Coverage directory used by tools like istanbul
-coverage
-
-# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
-.grunt
-
-# node-waf configuration
-.lock-wscript
-
-# Compiled binary addons (http://nodejs.org/api/addons.html)
-build/Release
-
-# Dependency directory
-# https://www.npmjs.org/doc/misc/npm-faq.html#should-i-check-my-node_modules-folder-into-git
-node_modules
-
-# Vim
-*.swp
-
-# Generated JavaScript
-/test/browserified.js
-/browserified.js
-/h.d.ts
-/h.js
-/h.js.map
-/hooks.d.ts
-/hooks.js
-/hooks.js.map
-/htmldomapi.d.ts
-/htmldomapi.js
-/htmldomapi.js.map
-/is.d.ts
-/is.js
-/is.js.map
-/snabbdom.bundle.d.ts
-/snabbdom.bundle.js
-/snabbdom.bundle.js.map
-/snabbdom.d.ts
-/snabbdom.js
-/snabbdom.js.map
-/thunk.d.ts
-/thunk.js
-/thunk.js.map
-/tovnode.d.ts
-/tovnode.js
-/tovnode.js.map
-/vnode.d.ts
-/vnode.js
-/vnode.js.map
-/modules
-/helpers
-/es

libs/snabbdom/.npmignore

@@ -1,33 +0,0 @@
-/test
-/perf
-
-# Logs
-logs
-*.log
-
-# Runtime data
-pids
-*.pid
-*.seed
-
-# Directory for instrumented libs generated by jscoverage/JSCover
-lib-cov
-
-# Coverage directory used by tools like istanbul
-coverage
-
-# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
-.grunt
-
-# node-waf configuration
-.lock-wscript
-
-# Compiled binary addons (http://nodejs.org/api/addons.html)
-build/Release
-
-# Dependency directory
-# https://www.npmjs.org/doc/misc/npm-faq.html#should-i-check-my-node_modules-folder-into-git
-node_modules
-
-# Vim
-*.swp

libs/snabbdom/.travis.yml

@@ -1,17 +0,0 @@
-sudo: false
-language: node_js
-node_js:
-  - '6.10.1'
-script:
-  - export IP_ADDR=$(ip addr | grep eth -A 4 | grep 'inet ' | awk '{ print $2 }' | sed 's/\/..//')
-  - npm test
-addons:
-  browserstack:
-    username:
-      secure: <TODO>
-    access_key:
-      secure: <TODO>
-env:
-  global:
-    - secure: <TODO>
-    - secure: <TODO>

libs/snabbdom/LICENSE

@@ -1,22 +0,0 @@
-The MIT License (MIT)
-
-Copyright (c) 2015 Simon Friis Vindum
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
-

libs/snabbdom/README.md

@@ -1,758 +0,0 @@
-# Snabbdom
-
-A virtual DOM library with focus on simplicity, modularity, powerful features
-and performance.
-
-[![License: MIT](https://img.shields.io/badge/License-MIT-brightgreen.svg)](https://opensource.org/licenses/MIT) [![npm version](https://badge.fury.io/js/snabbdom.svg)](https://badge.fury.io/js/snabbdom) [![npm downloads](https://img.shields.io/npm/dm/snabbdom.svg)](https://www.npmjs.com/package/snabbdom)
-
-[![Join the chat at https://gitter.im/paldepind/snabbdom](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/paldepind/snabbdom?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-
-## Table of contents
-
-* [Introduction](#introduction)
-* [Features](#features)
-* [Inline example](#inline-example)
-* [Examples](#examples)
-* [Core documentation](#core-documentation)
-* [Modules documentation](#modules-documentation)
-* [Helpers](#helpers)
-* [Virtual Node documentation](#virtual-node)
-* [Structuring applications](#structuring-applications)
-
-## Why
-
-Virtual DOM is awesome. It allows us to express our application's view
-as a function of its state. But existing solutions were way way too
-bloated, too slow, lacked features, had an API biased towards OOP
-and/or lacked features I needed.
-
-## Introduction
-
-Snabbdom consists of an extremely simple, performant and extensible
-core that is only ≈ 200 SLOC. It offers a modular architecture with
-rich functionality for extensions through custom modules. To keep the
-core simple, all non-essential functionality is delegated to modules.
-
-You can mold Snabbdom into whatever you desire! Pick, choose and
-customize the functionality you want. Alternatively you can just use
-the default extensions and get a virtual DOM library with high
-performance, small size and all the features listed below.
-
-## Features
-
-* Core features
-  * About 200 SLOC – you could easily read through the entire core and fully
-    understand how it works.
-  * Extendable through modules.
-  * A rich set of hooks available, both per vnode and globally for modules,
-    to hook into any part of the diff and patch process.
-  * Splendid performance. Snabbdom is among the fastest virtual DOM libraries
-    in the [Virtual DOM Benchmark](http://vdom-benchmark.github.io/vdom-benchmark/).
-  * Patch function with a function signature equivalent to a reduce/scan
-    function. Allows for easier integration with a FRP library.
-* Features in modules
-  * `h` function for easily creating virtual DOM nodes.
-  * [SVG _just works_ with the `h` helper](#svg).
-  * Features for doing complex CSS animations.
-  * Powerful event listener functionality.
-  * [Thunks](#thunks) to optimize the diff and patch process even further.
-* Third party features
-  * JSX support thanks to [snabbdom-pragma](https://github.com/Swizz/snabbdom-pragma).
-  * Server-side HTML output provided by [snabbdom-to-html](https://github.com/acstll/snabbdom-to-html).
-  * Compact virtual DOM creation with [snabbdom-helpers](https://github.com/krainboltgreene/snabbdom-helpers).
-  * Template string support using [snabby](https://github.com/jamen/snabby).
-  * Virtual DOM assertion with [snabbdom-looks-like](https://github.com/jvanbruegge/snabbdom-looks-like)
-
-## Inline example
-
-```javascript
-var snabbdom = require('snabbdom');
-var patch = snabbdom.init([ // Init patch function with chosen modules
-  require('snabbdom/modules/class').default, // makes it easy to toggle classes
-  require('snabbdom/modules/props').default, // for setting properties on DOM elements
-  require('snabbdom/modules/style').default, // handles styling on elements with support for animations
-  require('snabbdom/modules/eventlisteners').default, // attaches event listeners
-]);
-var h = require('snabbdom/h').default; // helper function for creating vnodes
-
-var container = document.getElementById('container');
-
-var vnode = h('div#container.two.classes', {on: {click: someFn}}, [
-  h('span', {style: {fontWeight: 'bold'}}, 'This is bold'),
-  ' and this is just normal text',
-  h('a', {props: {href: '/foo'}}, 'I\'ll take you places!')
-]);
-// Patch into empty DOM element – this modifies the DOM as a side effect
-patch(container, vnode);
-
-var newVnode = h('div#container.two.classes', {on: {click: anotherEventHandler}}, [
-  h('span', {style: {fontWeight: 'normal', fontStyle: 'italic'}}, 'This is now italic type'),
-  ' and this is still just normal text',
-  h('a', {props: {href: '/bar'}}, 'I\'ll take you places!')
-]);
-// Second `patch` invocation
-patch(vnode, newVnode); // Snabbdom efficiently updates the old view to the new state
-```
-
-## Examples
-
-* [Animated reordering of elements](http://snabbdom.github.io/snabbdom/examples/reorder-animation/)
-* [Hero transitions](http://snabbdom.github.io/snabbdom/examples/hero/)
-* [SVG Carousel](http://snabbdom.github.io/snabbdom/examples/carousel-svg/)
-
-## Core documentation
-
-The core of Snabbdom provides only the most essential functionality.
-It is designed to be as simple as possible while still being fast and
-extendable.
-
-### `snabbdom.init`
-
-The core exposes only one single function `snabbdom.init`. This `init`
-takes a list of modules and returns a `patch` function that uses the
-specified set of modules.
-
-```javascript
-var patch = snabbdom.init([
-  require('snabbdom/modules/class').default,
-  require('snabbdom/modules/style').default,
-]);
-```
-
-### `patch`
-
-The `patch` function returned by `init` takes two arguments. The first
-is a DOM element or a vnode representing the current view. The second
-is a vnode representing the new, updated view.
-
-If a DOM element with a parent is passed, `newVnode` will be turned
-into a DOM node, and the passed element will be replaced by the
-created DOM node. If an old vnode is passed, Snabbdom will efficiently
-modify it to match the description in the new vnode.
-
-Any old vnode passed must be the resulting vnode from a previous call
-to `patch`. This is necessary since Snabbdom stores information in the
-vnode. This makes it possible to implement a simpler and more
-performant architecture. This also avoids the creation of a new old
-vnode tree.
-
-```javascript
-patch(oldVnode, newVnode);
-```
-
-### `snabbdom/h`
-
-It is recommended that you use `snabbdom/h` to create vnodes. `h` accepts a
-tag/selector as a string, an optional data object and an optional string or
-array of children.
-
-```javascript
-var h = require('snabbdom/h').default;
-var vnode = h('div', {style: {color: '#000'}}, [
-  h('h1', 'Headline'),
-  h('p', 'A paragraph'),
-]);
-```
-
-### `snabbdom/tovnode`
-
-Converts a DOM node into a virtual node. Especially good for patching over an pre-existing, 
-server-side generated content.
-
-```javascript
-var snabbdom = require('snabbdom')
-var patch = snabbdom.init([ // Init patch function with chosen modules
-  require('snabbdom/modules/class').default, // makes it easy to toggle classes
-  require('snabbdom/modules/props').default, // for setting properties on DOM elements
-  require('snabbdom/modules/style').default, // handles styling on elements with support for animations
-  require('snabbdom/modules/eventlisteners').default, // attaches event listeners
-]);
-var h = require('snabbdom/h').default; // helper function for creating vnodes
-var toVNode = require('snabbdom/tovnode').default;
-
-var newVNode = h('div', {style: {color: '#000'}}, [
-  h('h1', 'Headline'),
-  h('p', 'A paragraph'),
-]);
-
-patch(toVNode(document.querySelector('.container')), newVNode)
-
-```
-
-### Hooks
-
-Hooks are a way to hook into the lifecycle of DOM nodes. Snabbdom
-offers a rich selection of hooks. Hooks are used both by modules to
-extend Snabbdom, and in normal code for executing arbitrary code at
-desired points in the life of a virtual node.
-
-#### Overview
-
-| Name        | Triggered when                                     | Arguments to callback   |
-| ----------- | --------------                                     | ----------------------- |
-| `pre`       | the patch process begins                           | none                    |
-| `init`      | a vnode has been added                             | `vnode`                 |
-| `create`    | a DOM element has been created based on a vnode    | `emptyVnode, vnode`     |
-| `insert`    | an element has been inserted into the DOM          | `vnode`                 |
-| `prepatch`  | an element is about to be patched                  | `oldVnode, vnode`       |
-| `update`    | an element is being updated                        | `oldVnode, vnode`       |
-| `postpatch` | an element has been patched                        | `oldVnode, vnode`       |
-| `destroy`   | an element is directly or indirectly being removed | `vnode`                 |
-| `remove`    | an element is directly being removed from the DOM  | `vnode, removeCallback` |
-| `post`      | the patch process is done                          | none                    |
-
-The following hooks are available for modules: `pre`, `create`,
-`update`, `destroy`, `remove`, `post`.
-
-The following hooks are available in the `hook` property of individual
-elements: `init`, `create`, `insert`, `prepatch`, `update`,
-`postpatch`, `destroy`, `remove`.
-
-#### Usage
-
-To use hooks, pass them as an object to `hook` field of the data
-object argument.
-
-```javascript
-h('div.row', {
-  key: movie.rank,
-  hook: {
-    insert: (vnode) => { movie.elmHeight = vnode.elm.offsetHeight; }
-  }
-});
-```
-
-#### The `init` hook
-
-This hook is invoked during the patch process when a new virtual node
-has been found. The hook is called before Snabbdom has processed the
-node in any way. I.e., before it has created a DOM node based on the
-vnode.
-
-#### The `insert` hook
-
-This hook is invoked once the DOM element for a vnode has been
-inserted into the document _and_ the rest of the patch cycle is done.
-This means that you can do DOM measurements (like using
-[getBoundingClientRect](https://developer.mozilla.org/en-US/docs/Web/API/Element/getBoundingClientRect)
-in this hook safely, knowing that no elements will be changed
-afterwards that could affect the position of the inserted elements.
-
-#### The `remove` hook
-
-Allows you to hook into the removal of an element. The hook is called
-once a vnode is to be removed from the DOM. The handling function
-receives both the vnode and a callback. You can control and delay the
-removal with the callback. The callback should be invoked once the
-hook is done doing its business, and the element will only be removed
-once all `remove` hooks have invoked their callback.
-
-The hook is only triggered when an element is to be removed from its
-parent – not if it is the child of an element that is removed. For
-that, see the `destroy` hook.
-
-#### The `destroy` hook
-
-This hook is invoked on a virtual node when its DOM element is removed
-from the DOM or if its parent is being removed from the DOM.
-
-To see the difference between this hook and the `remove` hook,
-consider an example.
-
-```js
-var vnode1 = h('div', [h('div', [h('span', 'Hello')])]);
-var vnode2 = h('div', []);
-patch(container, vnode1);
-patch(vnode1, vnode2);
-```
-
-Here `destroy` is triggered for both the inner `div` element _and_ the
-`span` element it contains. `remove`, on the other hand, is only
-triggered on the `div` element because it is the only element being
-detached from its parent.
-
-You can, for instance, use `remove` to trigger an animation when an
-element is being removed and use the `destroy` hook to additionally
-animate the disappearance of the removed element's children.
-
-### Creating modules
-
-Modules works by registering global listeners for [hooks](#hooks). A module is simply a dictionary mapping hook names to functions.
-
-```javascript
-var myModule = {
-  create: function(oldVnode, vnode) {
-    // invoked whenever a new virtual node is created
-  },
-  update: function(oldVnode, vnode) {
-    // invoked whenever a virtual node is updated
-  }
-};
-```
-
-With this mechanism you can easily augment the behaviour of Snabbdom.
-For demonstration, take a look at the implementations of the default
-modules.
-
-## Modules documentation
-
-This describes the core modules. All modules are optional.
-
-### The class module
-
-The class module provides an easy way to dynamically toggle classes on
-elements. It expects an object in the `class` data property. The
-object should map class names to booleans that indicates whether or
-not the class should stay or go on the vnode.
-
-```javascript
-h('a', {class: {active: true, selected: false}}, 'Toggle');
-```
-
-### The props module
-
-Allows you to set properties on DOM elements.
-
-```javascript
-h('a', {props: {href: '/foo'}}, 'Go to Foo');
-```
-
-### The attributes module
-
-Same as props, but set attributes instead of properties on DOM elements.
-
-```javascript
-h('a', {attrs: {href: '/foo'}}, 'Go to Foo');
-```
-
-Attributes are added and updated using `setAttribute`. In case of an
-attribute that had been previously added/set and is no longer present
-in the `attrs` object, it is removed from the DOM element's attribute
-list using `removeAttribute`.
-
-In the case of boolean attributes (e.g. `disabled`, `hidden`,
-`selected` ...), the meaning doesn't depend on the attribute value
-(`true` or `false`) but depends instead on the presence/absence of the
-attribute itself in the DOM element. Those attributes are handled
-differently by the module: if a boolean attribute is set to a
-[falsy value](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean)
-(`0`, `-0`, `null`, `false`,`NaN`, `undefined`, or the empty string
-(`""`)), then the attribute will be removed from the attribute list of
-the DOM element.
-
-### The dataset module
-
-Allows you to set custom data attributes (`data-*`) on DOM elements. These can then be accessed with the [HTMLElement.dataset](https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/dataset) property.
-
-```javascript
-h('button', {dataset: {action: 'reset'}}, 'Reset');
-```
-
-### The style module
-
-The style module is for making your HTML look slick and animate smoothly. At
-its core it allows you to set CSS properties on elements.
-
-```javascript
-h('span', {
-  style: {border: '1px solid #bada55', color: '#c0ffee', fontWeight: 'bold'}
-}, 'Say my name, and every colour illuminates');
-```
-
-Note that the style module does not remove style attributes if they
-are removed as properties from the style object. To remove a style,
-you should instead set it to the empty string.
-
-```javascript
-h('div', {
-  style: {position: shouldFollow ? 'fixed' : ''}
-}, 'I, I follow, I follow you');
-```
-
-#### Custom properties (CSS variables)
-
-CSS custom properties (aka CSS variables) are supported, they must be prefixed
-with `--`
-
-```javascript
-h('div', {
-  style: {'--warnColor': 'yellow'}
-}, 'Warning');
-```
-
-#### Delayed properties
-
-You can specify properties as being delayed. Whenever these properties
-change, the change is not applied until after the next frame.
-
-```javascript
-h('span', {
-  style: {opacity: '0', transition: 'opacity 1s', delayed: {opacity: '1'}}
-}, 'Imma fade right in!');
-```
-
-This makes it easy to declaratively animate the entry of elements.
-
-#### Set properties on `remove`
-
-Styles set in the `remove` property will take effect once the element
-is about to be removed from the DOM. The applied styles should be
-animated with CSS transitions. Only once all the styles are done
-animating will the element be removed from the DOM.
-
-```javascript
-h('span', {
-  style: {opacity: '1', transition: 'opacity 1s',
-          remove: {opacity: '0'}}
-}, 'It\'s better to fade out than to burn away');
-```
-
-This makes it easy to declaratively animate the removal of elements.
-
-#### Set properties on `destroy`
-
-```javascript
-h('span', {
-  style: {opacity: '1', transition: 'opacity 1s',
-          destroy: {opacity: '0'}}
-}, 'It\'s better to fade out than to burn away');
-```
-
-### Eventlisteners module
-
-The event listeners module gives powerful capabilities for attaching
-event listeners.
-
-You can attach a function to an event on a vnode by supplying an
-object at `on` with a property corresponding to the name of the event
-you want to listen to. The function will be called when the event
-happens and will be passed the event object that belongs to it.
-
-```javascript
-function clickHandler(ev) { console.log('got clicked'); }
-h('div', {on: {click: clickHandler}});
-```
-
-Very often, however, you're not really interested in the event object
-itself. Often you have some data associated with the element that
-triggers an event and you want that data passed along instead.
-
-Consider a counter application with three buttons, one to increment
-the counter by 1, one to increment the counter by 2 and one to
-increment the counter by 3. You don't really care exactly which button
-was pressed. Instead you're interested in what number was associated
-with the clicked button. The event listeners module allows one to
-express that by supplying an array at the named event property. The
-first element in the array should be a function that will be invoked
-with the value in the second element once the event occurs.
-
-```javascript
-function clickHandler(number) { console.log('button ' + number + ' was clicked!'); }
-h('div', [
-  h('a', {on: {click: [clickHandler, 1]}}),
-  h('a', {on: {click: [clickHandler, 2]}}),
-  h('a', {on: {click: [clickHandler, 3]}}),
-]);
-```
-
-Each handler is called not only with the given arguments but also with the current event and vnode appended to the argument list. It also supports using multiple listeners per event by specifying an array of handlers:
-```javascript
-stopPropagation = function(ev) { ev.stopPropagation() }
-sendValue = function(func, ev, vnode) { func(vnode.elm.value) }
-
-h('a', { on:{ click:[[sendValue, console.log], stopPropagation] } });
-```
-
-Snabbdom allows swapping event handlers between renders. This happens without
-actually touching the event handlers attached to the DOM.
-
-Note, however, that **you should be careful when sharing event
-handlers between vnodes**, because of the technique this module uses
-to avoid re-binding event handlers to the DOM. (And in general,
-sharing data between vnodes is not guaranteed to work, because modules
-are allowed to mutate the given data).
-
-In particular, you should **not** do something like this:
-
-```javascript
-// Does not work
-var sharedHandler = {
-  change: function(e){ console.log('you chose: ' + e.target.value); }
-};
-h('div', [
-  h('input', {props: {type: 'radio', name: 'test', value: '0'},
-              on: sharedHandler}),
-  h('input', {props: {type: 'radio', name: 'test', value: '1'},
-              on: sharedHandler}),
-  h('input', {props: {type: 'radio', name: 'test', value: '2'},
-              on: sharedHandler})
-]);
-```
-
-For many such cases, you can use array-based handlers instead (described above).
-Alternatively, simply make sure each node is passed unique `on` values:
-
-```javascript
-// Works
-var sharedHandler = function(e){ console.log('you chose: ' + e.target.value); };
-h('div', [
-  h('input', {props: {type: 'radio', name: 'test', value: '0'},
-              on: {change: sharedHandler}}),
-  h('input', {props: {type: 'radio', name: 'test', value: '1'},
-              on: {change: sharedHandler}}),
-  h('input', {props: {type: 'radio', name: 'test', value: '2'},
-              on: {change: sharedHandler}})
-]);
-```
-
-## Helpers
-
-### SVG
-
-SVG just works when using the `h` function for creating virtual
-nodes. SVG elements are automatically created with the appropriate
-namespaces.
-
-```javascript
-var vnode = h('div', [
-  h('svg', {attrs: {width: 100, height: 100}}, [
-    h('circle', {attrs: {cx: 50, cy: 50, r: 40, stroke: 'green', 'stroke-width': 4, fill: 'yellow'}})
-  ])
-]);
-```
-
-See also the [SVG example](./examples/svg) and the [SVG Carousel example](./examples/carousel-svg/).
-
-#### Using Classes in SVG Elements
-
-Certain browsers (like IE <=11) [do not support `classList` property in SVG elements](http://caniuse.com/#feat=classlist).
-Hence, the _class_ module (which uses `classList` property internally) will not work for these browsers.
-
-The classes in selectors for SVG elements work fine from version 0.6.7.
-
-You can add dynamic classes to SVG elements for these cases by using the _attributes_ module and an Array as shown below:
-
-```js
-h('svg', [
-  h('text.underline', { // 'underline' is a selector class, remain unchanged between renders.
-      attrs: {
-        // 'active' and 'red' are dynamic classes, they can change between renders
-        // so we need to put them in the class attribute.
-        // (Normally we'd use the classModule, but it doesn't work inside SVG)
-        class: [isActive && "active", isColored && "red"].filter(Boolean).join(" ")
-      }
-    },
-    'Hello World'
-  )
-])
-```
-
-### Thunks
-
-The `thunk` function takes a selector, a key for identifying a thunk,
-a function that returns a vnode and a variable amount of state
-parameters. If invoked, the render function will receive the state
-arguments.
-
-`thunk(selector, key, renderFn, [stateArguments])`
-
-The `key` is optional. It should be supplied when the `selector` is
-not unique among the thunks siblings. This ensures that the thunk is
-always matched correctly when diffing.
-
-Thunks are an optimization strategy that can be used when one is
-dealing with immutable data.
-
-Consider a simple function for creating a virtual node based on a number.
-
-```js
-function numberView(n) {
-  return h('div', 'Number is: ' + n);
-}
-```
-
-The view depends only on `n`. This means that if `n` is unchanged,
-then creating the virtual DOM node and patching it against the old
-vnode is wasteful. To avoid the overhead we can use the `thunk` helper
-function.
-
-```js
-function render(state) {
-  return thunk('num', numberView, [state.number]);
-}
-```
-
-Instead of actually invoking the `numberView` function this will only
-place a dummy vnode in the virtual tree. When Snabbdom patches this
-dummy vnode against a previous vnode, it will compare the value of
-`n`. If `n` is unchanged it will simply reuse the old vnode. This
-avoids recreating the number view and the diff process altogether.
-
-The view function here is only an example. In practice thunks are only
-relevant if you are rendering a complicated view that takes
-significant computational time to generate.
-
-## Virtual Node
-**Properties**
- - [sel](#sel--string)
- - [data](#data--object)
- - [children](#children--array)
- - [text](#text--string)
- - [elm](#elm--element)
- - [key](#key--string--number)
-
-#### sel : String
-
-The `.sel` property of a virtual node is the CSS selector passed to
-[`h()`](#snabbdomh) during creation. For example: `h('div#container',
-{}, [...])` will create a a virtual node which has `div#container` as
-its `.sel` property.
-
-#### data : Object
-
-The `.data` property of a virtual node is the place to add information
-for [modules](#modules-documentation) to access and manipulate the
-real DOM element when it is created; Add styles, CSS classes,
-attributes, etc.
-
-The data object is the (optional) second parameter to [`h()`](#snabbdomh)
-
-For example `h('div', {props: {className: 'container'}}, [...])` will produce a virtual node with
-```js
-{
-  "props": {
-    className: "container"
-  }
-}
-```
-as its `.data` object.
-
-#### children : Array<vnode>
-
-The `.children` property of a virtual node is the third (optional)
-parameter to [`h()`](#snabbdomh) during creation. `.children` is
-simply an Array of virtual nodes that should be added as children of
-the parent DOM node upon creation.
-
-For example `h('div', {}, [ h('h1', {}, 'Hello, World') ])` will
-create a virtual node with
-
-```js
-[
- {
-   sel: 'h1',
-   data: {},
-   children: undefined,
-   text: 'Hello, World',
-   elm: Element,
-   key: undefined,
- }
-]
-```
-
-as its `.children` property.
-
-#### text : string
-
-The `.text` property is created when a virtual node is created with
-only a single child that possesses text and only requires
-`document.createTextNode()` to be used.
-
-For example: `h('h1', {}, 'Hello')` will create a virtual node with
-`Hello` as its `.text` property.
-
-#### elm : Element
-
-The `.elm` property of a virtual node is a pointer to the real DOM
-node created by snabbdom. This property is very useful to do
-calculations in [hooks](#hooks) as well as
-[modules](#modules-documentation).
-
-#### key : string | number
-
-The `.key` property is created when a key is provided inside of your
-[`.data`](#data--object) object. The `.key` property is used to keep
-pointers to DOM nodes that existed previously to avoid recreating them
-if it is unnecessary. This is very useful for things like list
-reordering. A key must be either a string or a number to allow for
-proper lookup as it is stored internally as a key/value pair inside of
-an object, where `.key` is the key and the value is the
-[`.elm`](#elm--element) property created.
-
-For example: `h('div', {key: 1}, [])` will create a virtual node
-object with a `.key` property with the value of `1`.
-
-
-## Structuring applications
-
-Snabbdom is a low-level virtual DOM library. It is unopinionated with
-regards to how you should structure your application.
-
-Here are some approaches to building applications with Snabbdom.
-
-* [functional-frontend-architecture](https://github.com/paldepind/functional-frontend-architecture) –
-  a repository containing several example applications that
-  demonstrates an architecture that uses Snabbdom.
-* [Cycle.js](https://cycle.js.org/) –
-  "A functional and reactive JavaScript framework for cleaner code"
-  uses Snabbdom
-* [Vue.js](http://vuejs.org/) use a fork of snabbdom.
-* [scheme-todomvc](https://github.com/amirouche/scheme-todomvc/) build
-  redux-like architecture on top of snabbdom bindings.
-* [kaiju](https://github.com/AlexGalays/kaiju) -
-  Stateful components and observables on top of snabbdom
-* [Tweed](https://tweedjs.github.io) –
-  An Object Oriented approach to reactive interfaces.
-* [Cyclow](http://cyclow.js.org) -
-  "A reactive frontend framework for JavaScript"
-  uses Snabbdom
-* [Tung](https://github.com/Reon90/tung) –
-  A JavaScript library for rendering html. Tung helps to divide html and JavaScript development.
-* [sprotty](https://github.com/theia-ide/sprotty) - "A web-based diagramming framework" uses Snabbdom.
-* [Mark Text](https://github.com/marktext/marktext) - "Realtime preview Markdown Editor" build on Snabbdom.
-* [puddles](https://github.com/flintinatux/puddles) - 
-  "Tiny vdom app framework. Pure Redux. No boilerplate." - Built with :heart: on Snabbdom.
-* [Backbone.VDOMView](https://github.com/jcbrand/backbone.vdomview) - A [Backbone](http://backbonejs.org/) View with VirtualDOM capability via Snabbdom.
-
-Be sure to share it if you're building an application in another way
-using Snabbdom.
-
-## Common errors
-
-```
-Uncaught NotFoundError: Failed to execute 'insertBefore' on 'Node':
-    The node before which the new node is to be inserted is not a child of this node.
-```
-The reason for this error is reusing of vnodes between patches (see code example), snabbdom stores actual dom nodes inside the virtual dom nodes passed to it as performance improvement, so reusing nodes between patches is not supported.
-```js
-var sharedNode = h('div', {}, 'Selected');
-var vnode1 = h('div', [
-  h('div', {}, ['One']),
-  h('div', {}, ['Two']),
-  h('div', {}, [sharedNode]),
-]);
-var vnode2 = h('div', [
-  h('div', {}, ['One']),
-  h('div', {}, [sharedNode]),
-  h('div', {}, ['Three']),
-]);
-patch(container, vnode1);
-patch(vnode1, vnode2);
-```
-You can fix this issue by creating a shallow copy of the object (here with object spread syntax):
-```js
-var vnode2 = h('div', [
-  h('div', {}, ['One']),
-  h('div', {}, [{ ...sharedNode }]),
-  h('div', {}, ['Three']),
-]);
-```
-Another solution would be to wrap shared vnodes in a factory function:
-```js
-var sharedNode = () => h('div', {}, 'Selected');
-var vnode1 = h('div', [
-  h('div', {}, ['One']),
-  h('div', {}, ['Two']),
-  h('div', {}, [sharedNode()]),
-]);
-```

libs/snabbdom/browserstack-karma.js

@@ -1,95 +0,0 @@
-module.exports = {
-  // Latest mainstream
-  BS_Chrome_Current: {
-    base: 'BrowserStack',
-    browser: 'chrome',
-    browser_version: 'latest',
-    os: 'Windows',
-    os_version: '10',
-  },
-  BS_Firefox_Current: {
-    base: 'BrowserStack',
-    browser: 'firefox',
-    browser_version: 'latest',
-    os: 'Windows',
-    os_version: '10',
-  },
-  BS_Safari_Current: {
-    base: 'BrowserStack',
-    browser: 'safari',
-    browser_version: 'latest',
-    os: 'OS X',
-    os_version: 'High Sierra',
-  },
-  BS_Android_8: {
-    base: 'BrowserStack',
-    browser: 'Android',
-    device: 'Google Pixel 2',
-    os: 'Android',
-    os_version: '8.0',
-    real_mobile: true,
-  },
-
-  // Older mainstream
-  BS_Chrome_49: {
-    base: 'BrowserStack',
-    browser: 'chrome',
-    browser_version: '49',
-    os: 'Windows',
-    os_version: '10',
-  },
-  BS_Firefox_52: {
-    base: 'BrowserStack',
-    browser: 'firefox',
-    browser_version: '52',
-    os: 'Windows',
-    os_version: '10',
-  },
-  BS_Safari_9: {
-    base: 'BrowserStack',
-    browser: 'safari',
-    browser_version: '9.1',
-    os: 'OS X',
-    os_version: 'El Capitan',
-  },
-
-  // Misc
-  BS_Android_4_4: {
-    base: 'BrowserStack',
-    device_browser: 'ucbrowser',
-    device: 'Google Nexus 5',
-    os: 'Android',
-    os_version: '4.4',
-    real_mobile: true,
-  },
-  BS_iphone_10: {
-    base: 'BrowserStack',
-    browser: 'Mobile Safari',
-    browser_version: null,
-    device: 'iPhone 7',
-    real_mobile: true,
-    os: 'ios',
-    os_version: '10.3',
-  },
-  BS_MS_Edge: {
-    base: 'BrowserStack',
-    browser: 'edge',
-    browser_version: 'latest',
-    os: 'Windows',
-    os_version: '10',
-  },
-  BS_IE_11: {
-    base: 'BrowserStack',
-    browser: 'ie',
-    browser_version: '11.0',
-    os: 'Windows',
-    os_version: '7',
-  },
-  BS_IE_10: {
-    base: 'BrowserStack',
-    browser: 'ie',
-    browser_version: '10.0',
-    os: 'Windows',
-    os_version: '7',
-  },
-};

libs/snabbdom/dist/h.js

@@ -1,83 +0,0 @@
-(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.h = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
-"use strict";
-Object.defineProperty(exports, "__esModule", { value: true });
-var vnode_1 = require("./vnode");
-var is = require("./is");
-function addNS(data, children, sel) {
-    data.ns = 'http://www.w3.org/2000/svg';
-    if (sel !== 'foreignObject' && children !== undefined) {
-        for (var i = 0; i < children.length; ++i) {
-            var childData = children[i].data;
-            if (childData !== undefined) {
-                addNS(childData, children[i].children, children[i].sel);
-            }
-        }
-    }
-}
-function h(sel, b, c) {
-    var data = {}, children, text, i;
-    if (c !== undefined) {
-        data = b;
-        if (is.array(c)) {
-            children = c;
-        }
-        else if (is.primitive(c)) {
-            text = c;
-        }
-        else if (c && c.sel) {
-            children = [c];
-        }
-    }
-    else if (b !== undefined) {
-        if (is.array(b)) {
-            children = b;
-        }
-        else if (is.primitive(b)) {
-            text = b;
-        }
-        else if (b && b.sel) {
-            children = [b];
-        }
-        else {
-            data = b;
-        }
-    }
-    if (is.array(children)) {
-        for (i = 0; i < children.length; ++i) {
-            if (is.primitive(children[i]))
-                children[i] = vnode_1.vnode(undefined, undefined, undefined, children[i]);
-        }
-    }
-    if (sel[0] === 's' && sel[1] === 'v' && sel[2] === 'g' &&
-        (sel.length === 3 || sel[3] === '.' || sel[3] === '#')) {
-        addNS(data, children, sel);
-    }
-    return vnode_1.vnode(sel, data, children, text, undefined);
-}
-exports.h = h;
-;
-exports.default = h;
-
-},{"./is":2,"./vnode":3}],2:[function(require,module,exports){
-"use strict";
-Object.defineProperty(exports, "__esModule", { value: true });
-exports.array = Array.isArray;
-function primitive(s) {
-    return typeof s === 'string' || typeof s === 'number';
-}
-exports.primitive = primitive;
-
-},{}],3:[function(require,module,exports){
-"use strict";
-Object.defineProperty(exports, "__esModule", { value: true });
-function vnode(sel, data, children, text, elm) {
-    var key = data === undefined ? undefined : data.key;
-    return { sel: sel, data: data, children: children,
-        text: text, elm: elm, key: key };
-}
-exports.vnode = vnode;
-exports.default = vnode;
-
-},{}]},{},[1])(1)
-});
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libs/snabbdom/dist/h.min.js

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libs/snabbdom/dist/snabbdom-attributes.min.js

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libs/snabbdom/dist/snabbdom-class.js

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-    var cur, name, elm = vnode.elm, oldClass = oldVnode.data.class, klass = vnode.data.class;
-    if (!oldClass && !klass)
-        return;
-    if (oldClass === klass)
-        return;
-    oldClass = oldClass || {};
-    klass = klass || {};
-    for (name in oldClass) {
-        if (!klass[name]) {
-            elm.classList.remove(name);
-        }
-    }
-    for (name in klass) {
-        cur = klass[name];
-        if (cur !== oldClass[name]) {
-            elm.classList[cur ? 'add' : 'remove'](name);
-        }
-    }
-}
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-
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libs/snabbdom/dist/snabbdom-class.min.js

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libs/snabbdom/dist/snabbdom-dataset.js

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-"use strict";
-Object.defineProperty(exports, "__esModule", { value: true });
-var CAPS_REGEX = /[A-Z]/g;
-function updateDataset(oldVnode, vnode) {
-    var elm = vnode.elm, oldDataset = oldVnode.data.dataset, dataset = vnode.data.dataset, key;
-    if (!oldDataset && !dataset)
-        return;
-    if (oldDataset === dataset)
-        return;
-    oldDataset = oldDataset || {};
-    dataset = dataset || {};
-    var d = elm.dataset;
-    for (key in oldDataset) {
-        if (!dataset[key]) {
-            if (d) {
-                if (key in d) {
-                    delete d[key];
-                }
-            }
-            else {
-                elm.removeAttribute('data-' + key.replace(CAPS_REGEX, '-$&').toLowerCase());
-            }
-        }
-    }
-    for (key in dataset) {
-        if (oldDataset[key] !== dataset[key]) {
-            if (d) {
-                d[key] = dataset[key];
-            }
-            else {
-                elm.setAttribute('data-' + key.replace(CAPS_REGEX, '-$&').toLowerCase(), dataset[key]);
-            }
-        }
-    }
-}
-exports.datasetModule = { create: updateDataset, update: updateDataset };
-exports.default = exports.datasetModule;
-
-},{}]},{},[1])(1)
-});
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libs/snabbdom/dist/snabbdom-eventlisteners.min.js

@@ -1,2 +0,0 @@
-!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var n;n="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this,n.snabbdom_eventlisteners=e()}}(function(){return function e(n,t,r){function o(f,u){if(!t[f]){if(!n[f]){var l="function"==typeof require&&require;if(!u&&l)return l(f,!0);if(i)return i(f,!0);var s=new Error("Cannot find module '"+f+"'");throw s.code="MODULE_NOT_FOUND",s}var d=t[f]={exports:{}};n[f][0].call(d.exports,function(e){var t=n[f][1][e];return o(t?t:e)},d,d.exports,e,n,t,r)}return t[f].exports}for(var i="function"==typeof require&&require,f=0;f<r.length;f++)o(r[f]);return o}({1:[function(e,n,t){"use strict";function r(e,n,t){if("function"==typeof e)e.call(n,t,n);else if("object"==typeof e)if("function"==typeof e[0])if(2===e.length)e[0].call(n,e[1],t,n);else{var o=e.slice(1);o.push(t),o.push(n),e[0].apply(n,o)}else for(var i=0;i<e.length;i++)r(e[i])}function o(e,n){var t=e.type,o=n.data.on;o&&o[t]&&r(o[t],n,e)}function i(){return function e(n){o(n,e.vnode)}}function f(e,n){var t,r=e.data.on,o=e.listener,f=e.elm,u=n&&n.data.on,l=n&&n.elm;if(r!==u){if(r&&o)if(u)for(t in r)u[t]||f.removeEventListener(t,o,!1);else for(t in r)f.removeEventListener(t,o,!1);if(u){var s=n.listener=e.listener||i();if(s.vnode=n,r)for(t in u)r[t]||l.addEventListener(t,s,!1);else for(t in u)l.addEventListener(t,s,!1)}}}t.eventListenersModule={create:f,update:f,destroy:f},Object.defineProperty(t,"__esModule",{value:!0}),t["default"]=t.eventListenersModule},{}]},{},[1])(1)});
-//# sourceMappingURL=snabbdom-eventlisteners.min.js.map

libs/snabbdom/dist/snabbdom-props.js

@@ -1,30 +0,0 @@
-(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.snabbdom_props = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
-"use strict";
-Object.defineProperty(exports, "__esModule", { value: true });
-function updateProps(oldVnode, vnode) {
-    var key, cur, old, elm = vnode.elm, oldProps = oldVnode.data.props, props = vnode.data.props;
-    if (!oldProps && !props)
-        return;
-    if (oldProps === props)
-        return;
-    oldProps = oldProps || {};
-    props = props || {};
-    for (key in oldProps) {
-        if (!props[key]) {
-            delete elm[key];
-        }
-    }
-    for (key in props) {
-        cur = props[key];
-        old = oldProps[key];
-        if (old !== cur && (key !== 'value' || elm[key] !== cur)) {
-            elm[key] = cur;
-        }
-    }
-}
-exports.propsModule = { create: updateProps, update: updateProps };
-exports.default = exports.propsModule;
-
-},{}]},{},[1])(1)
-});
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libs/snabbdom/dist/snabbdom-props.min.js

@@ -1,2 +0,0 @@
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-//# sourceMappingURL=snabbdom-props.min.js.map

libs/snabbdom/dist/snabbdom-style.min.js

@@ -1,2 +0,0 @@
-!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var t;t="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this,t.snabbdom_style=e()}}(function(){return function e(t,n,r){function o(f,d){if(!n[f]){if(!t[f]){var u="function"==typeof require&&require;if(!d&&u)return u(f,!0);if(i)return i(f,!0);var l=new Error("Cannot find module '"+f+"'");throw l.code="MODULE_NOT_FOUND",l}var a=n[f]={exports:{}};t[f][0].call(a.exports,function(e){var n=t[f][1][e];return o(n?n:e)},a,a.exports,e,t,n,r)}return n[f].exports}for(var i="function"==typeof require&&require,f=0;f<r.length;f++)o(r[f]);return o}({1:[function(e,t,n){"use strict";function r(e,t,n){u(function(){e[t]=n})}function o(e,t){var n,o,i=t.elm,f=e.data.style,d=t.data.style;if((f||d)&&f!==d){f=f||{},d=d||{};var u="delayed"in f;for(o in f)d[o]||("-"===o[0]&&"-"===o[1]?i.style.removeProperty(o):i.style[o]="");for(o in d)if(n=d[o],"delayed"===o)for(o in d.delayed)n=d.delayed[o],u&&n===f.delayed[o]||r(i.style,o,n);else"remove"!==o&&n!==f[o]&&("-"===o[0]&&"-"===o[1]?i.style.setProperty(o,n):i.style[o]=n)}}function i(e){var t,n,r=e.elm,o=e.data.style;if(o&&(t=o.destroy))for(n in t)r.style[n]=t[n]}function f(e,t){var n=e.data.style;if(!n||!n.remove)return void t();var r,o,i=e.elm,f=0,d=n.remove,u=0,l=[];for(r in d)l.push(r),i.style[r]=d[r];o=getComputedStyle(i);for(var a=o["transition-property"].split(", ");f<a.length;++f)l.indexOf(a[f])!==-1&&u++;i.addEventListener("transitionend",function(e){e.target===i&&--u,0===u&&t()})}var d="undefined"!=typeof window&&window.requestAnimationFrame||setTimeout,u=function(e){d(function(){d(e)})};n.styleModule={create:o,update:o,destroy:i,remove:f},Object.defineProperty(n,"__esModule",{value:!0}),n["default"]=n.styleModule},{}]},{},[1])(1)});
-//# sourceMappingURL=snabbdom-style.min.js.map

libs/snabbdom/dist/tovnode.min.js

@@ -1,2 +0,0 @@
-!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var t;t="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this,t.tovnode=e()}}(function(){return function e(t,n,o){function r(u,d){if(!n[u]){if(!t[u]){var f="function"==typeof require&&require;if(!d&&f)return f(u,!0);if(i)return i(u,!0);var a=new Error("Cannot find module '"+u+"'");throw a.code="MODULE_NOT_FOUND",a}var l=n[u]={exports:{}};t[u][0].call(l.exports,function(e){var n=t[u][1][e];return r(n?n:e)},l,l.exports,e,t,n,o)}return n[u].exports}for(var i="function"==typeof require&&require,u=0;u<o.length;u++)r(o[u]);return r}({1:[function(e,t,n){"use strict";function o(e){return document.createElement(e)}function r(e,t){return document.createElementNS(e,t)}function i(e){return document.createTextNode(e)}function u(e){return document.createComment(e)}function d(e,t,n){e.insertBefore(t,n)}function f(e,t){e.removeChild(t)}function a(e,t){e.appendChild(t)}function l(e){return e.parentNode}function c(e){return e.nextSibling}function s(e){return e.tagName}function m(e,t){e.textContent=t}function v(e){return e.textContent}function p(e){return 1===e.nodeType}function x(e){return 3===e.nodeType}function h(e){return 8===e.nodeType}n.htmlDomApi={createElement:o,createElementNS:r,createTextNode:i,createComment:u,insertBefore:d,removeChild:f,appendChild:a,parentNode:l,nextSibling:c,tagName:s,setTextContent:m,getTextContent:v,isElement:p,isText:x,isComment:h},Object.defineProperty(n,"__esModule",{value:!0}),n["default"]=n.htmlDomApi},{}],2:[function(e,t,n){"use strict";function o(e,t){var n,u=void 0!==t?t:i["default"];if(u.isElement(e)){var d,f=e.id?"#"+e.id:"",a=e.getAttribute("class"),l=a?"."+a.split(" ").join("."):"",c=u.tagName(e).toLowerCase()+f+l,s={},m=[],v=void 0,p=void 0,x=e.attributes,h=e.childNodes;for(v=0,p=x.length;v<p;v++)d=x[v].nodeName,"id"!==d&&"class"!==d&&(s[d]=x[v].nodeValue);for(v=0,p=h.length;v<p;v++)m.push(o(h[v]));return r["default"](c,{attrs:s},m,void 0,e)}return u.isText(e)?(n=u.getTextContent(e),r["default"](void 0,void 0,void 0,n,e)):u.isComment(e)?(n=u.getTextContent(e),r["default"]("!",void 0,void 0,n,void 0)):r["default"]("",{},[],void 0,void 0)}var r=e("./vnode"),i=e("./htmldomapi");n.toVNode=o,Object.defineProperty(n,"__esModule",{value:!0}),n["default"]=o},{"./htmldomapi":1,"./vnode":3}],3:[function(e,t,n){"use strict";function o(e,t,n,o,r){var i=void 0===t?void 0:t.key;return{sel:e,data:t,children:n,text:o,elm:r,key:i}}n.vnode=o,Object.defineProperty(n,"__esModule",{value:!0}),n["default"]=o},{}]},{},[2])(2)});
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libs/snabbdom/examples/carousel-svg/README.md

@@ -1,19 +0,0 @@
-This carousel example uses `style transform` and `transition` to rotate a group of SVG triangles.
-
-Also, the color of each triangle changes when you hover or click/tap it.
-
-I built the build.js using npm and browserify. 
-
-In my local copy of the snabbdom project root I did these preparations:
-```
-npm install --save-dev babelify
-npm install --save-dev babel-preset-es2015
-echo '{ "presets": ["es2015"] }' > .babelrc
-```
-
-I then built like this:
-```
-browserify examples/carousel-svg/script.js -t babelify -o examples/carousel-svg/build.js
-```
-
--- *jk*

libs/snabbdom/examples/carousel-svg/build.js

@@ -1,566 +0,0 @@
-(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
-'use strict';
-
-var VNode = require('./vnode');
-var is = require('./is');
-
-function addNS(data, children) {
-  data.ns = 'http://www.w3.org/2000/svg';
-  if (children !== undefined) {
-    for (var i = 0; i < children.length; ++i) {
-      addNS(children[i].data, children[i].children);
-    }
-  }
-}
-
-module.exports = function h(sel, b, c) {
-  var data = {},
-      children,
-      text,
-      i;
-  if (arguments.length === 3) {
-    data = b;
-    if (is.array(c)) {
-      children = c;
-    } else if (is.primitive(c)) {
-      text = c;
-    }
-  } else if (arguments.length === 2) {
-    if (is.array(b)) {
-      children = b;
-    } else if (is.primitive(b)) {
-      text = b;
-    } else {
-      data = b;
-    }
-  }
-  if (is.array(children)) {
-    for (i = 0; i < children.length; ++i) {
-      if (is.primitive(children[i])) children[i] = VNode(undefined, undefined, undefined, children[i]);
-    }
-  }
-  if (sel[0] === 's' && sel[1] === 'v' && sel[2] === 'g') {
-    addNS(data, children);
-  }
-  return VNode(sel, data, children, text, undefined);
-};
-
-},{"./is":2,"./vnode":7}],2:[function(require,module,exports){
-'use strict';
-
-module.exports = {
-  array: Array.isArray,
-  primitive: function primitive(s) {
-    return typeof s === 'string' || typeof s === 'number';
-  }
-};
-
-},{}],3:[function(require,module,exports){
-"use strict";
-
-var booleanAttrs = ["allowfullscreen", "async", "autofocus", "autoplay", "checked", "compact", "controls", "declare", "default", "defaultchecked", "defaultmuted", "defaultselected", "defer", "disabled", "draggable", "enabled", "formnovalidate", "hidden", "indeterminate", "inert", "ismap", "itemscope", "loop", "multiple", "muted", "nohref", "noresize", "noshade", "novalidate", "nowrap", "open", "pauseonexit", "readonly", "required", "reversed", "scoped", "seamless", "selected", "sortable", "spellcheck", "translate", "truespeed", "typemustmatch", "visible"];
-
-var booleanAttrsDict = {};
-for (var i = 0, len = booleanAttrs.length; i < len; i++) {
-  booleanAttrsDict[booleanAttrs[i]] = true;
-}
-
-function updateAttrs(oldVnode, vnode) {
-  var key,
-      cur,
-      old,
-      elm = vnode.elm,
-      oldAttrs = oldVnode.data.attrs || {},
-      attrs = vnode.data.attrs || {};
-
-  // update modified attributes, add new attributes
-  for (key in attrs) {
-    cur = attrs[key];
-    old = oldAttrs[key];
-    if (old !== cur) {
-      // TODO: add support to namespaced attributes (setAttributeNS)
-      if (!cur && booleanAttrsDict[key]) elm.removeAttribute(key);else elm.setAttribute(key, cur);
-    }
-  }
-  //remove removed attributes
-  // use `in` operator since the previous `for` iteration uses it (.i.e. add even attributes with undefined value)
-  // the other option is to remove all attributes with value == undefined
-  for (key in oldAttrs) {
-    if (!(key in attrs)) {
-      elm.removeAttribute(key);
-    }
-  }
-}
-
-module.exports = { create: updateAttrs, update: updateAttrs };
-
-},{}],4:[function(require,module,exports){
-'use strict';
-
-var is = require('../is');
-
-function arrInvoker(arr) {
-  return function () {
-    // Special case when length is two, for performance
-    arr.length === 2 ? arr[0](arr[1]) : arr[0].apply(undefined, arr.slice(1));
-  };
-}
-
-function fnInvoker(o) {
-  return function (ev) {
-    o.fn(ev);
-  };
-}
-
-function updateEventListeners(oldVnode, vnode) {
-  var name,
-      cur,
-      old,
-      elm = vnode.elm,
-      oldOn = oldVnode.data.on || {},
-      on = vnode.data.on;
-  if (!on) return;
-  for (name in on) {
-    cur = on[name];
-    old = oldOn[name];
-    if (old === undefined) {
-      if (is.array(cur)) {
-        elm.addEventListener(name, arrInvoker(cur));
-      } else {
-        cur = { fn: cur };
-        on[name] = cur;
-        elm.addEventListener(name, fnInvoker(cur));
-      }
-    } else if (is.array(old)) {
-      // Deliberately modify old array since it's captured in closure created with `arrInvoker`
-      old.length = cur.length;
-      for (var i = 0; i < old.length; ++i) {
-        old[i] = cur[i];
-      }on[name] = old;
-    } else {
-      old.fn = cur;
-      on[name] = old;
-    }
-  }
-}
-
-module.exports = { create: updateEventListeners, update: updateEventListeners };
-
-},{"../is":2}],5:[function(require,module,exports){
-'use strict';
-
-var raf = window && window.requestAnimationFrame || setTimeout;
-var nextFrame = function nextFrame(fn) {
-  raf(function () {
-    raf(fn);
-  });
-};
-
-function setNextFrame(obj, prop, val) {
-  nextFrame(function () {
-    obj[prop] = val;
-  });
-}
-
-function updateStyle(oldVnode, vnode) {
-  var cur,
-      name,
-      elm = vnode.elm,
-      oldStyle = oldVnode.data.style || {},
-      style = vnode.data.style || {},
-      oldHasDel = 'delayed' in oldStyle;
-  for (name in oldStyle) {
-    if (!style[name]) {
-      elm.style[name] = '';
-    }
-  }
-  for (name in style) {
-    cur = style[name];
-    if (name === 'delayed') {
-      for (name in style.delayed) {
-        cur = style.delayed[name];
-        if (!oldHasDel || cur !== oldStyle.delayed[name]) {
-          setNextFrame(elm.style, name, cur);
-        }
-      }
-    } else if (name !== 'remove' && cur !== oldStyle[name]) {
-      elm.style[name] = cur;
-    }
-  }
-}
-
-function applyDestroyStyle(vnode) {
-  var style,
-      name,
-      elm = vnode.elm,
-      s = vnode.data.style;
-  if (!s || !(style = s.destroy)) return;
-  for (name in style) {
-    elm.style[name] = style[name];
-  }
-}
-
-function applyRemoveStyle(vnode, rm) {
-  var s = vnode.data.style;
-  if (!s || !s.remove) {
-    rm();
-    return;
-  }
-  var name,
-      elm = vnode.elm,
-      idx,
-      i = 0,
-      maxDur = 0,
-      compStyle,
-      style = s.remove,
-      amount = 0,
-      applied = [];
-  for (name in style) {
-    applied.push(name);
-    elm.style[name] = style[name];
-  }
-  compStyle = getComputedStyle(elm);
-  var props = compStyle['transition-property'].split(', ');
-  for (; i < props.length; ++i) {
-    if (applied.indexOf(props[i]) !== -1) amount++;
-  }
-  elm.addEventListener('transitionend', function (ev) {
-    if (ev.target === elm) --amount;
-    if (amount === 0) rm();
-  });
-}
-
-module.exports = { create: updateStyle, update: updateStyle, destroy: applyDestroyStyle, remove: applyRemoveStyle };
-
-},{}],6:[function(require,module,exports){
-// jshint newcap: false
-/* global require, module, document, Element */
-'use strict';
-
-var VNode = require('./vnode');
-var is = require('./is');
-
-function isUndef(s) {
-  return s === undefined;
-}
-function isDef(s) {
-  return s !== undefined;
-}
-
-function emptyNodeAt(elm) {
-  return VNode(elm.tagName, {}, [], undefined, elm);
-}
-
-var emptyNode = VNode('', {}, [], undefined, undefined);
-
-function sameVnode(vnode1, vnode2) {
-  return vnode1.key === vnode2.key && vnode1.sel === vnode2.sel;
-}
-
-function createKeyToOldIdx(children, beginIdx, endIdx) {
-  var i,
-      map = {},
-      key;
-  for (i = beginIdx; i <= endIdx; ++i) {
-    key = children[i].key;
-    if (isDef(key)) map[key] = i;
-  }
-  return map;
-}
-
-function createRmCb(childElm, listeners) {
-  return function () {
-    if (--listeners === 0) childElm.parentElement.removeChild(childElm);
-  };
-}
-
-var hooks = ['create', 'update', 'remove', 'destroy', 'pre', 'post'];
-
-function init(modules) {
-  var i,
-      j,
-      cbs = {};
-  for (i = 0; i < hooks.length; ++i) {
-    cbs[hooks[i]] = [];
-    for (j = 0; j < modules.length; ++j) {
-      if (modules[j][hooks[i]] !== undefined) cbs[hooks[i]].push(modules[j][hooks[i]]);
-    }
-  }
-
-  function createElm(vnode, insertedVnodeQueue) {
-    var i,
-        data = vnode.data;
-    if (isDef(data)) {
-      if (isDef(i = data.hook) && isDef(i = i.init)) i(vnode);
-      if (isDef(i = data.vnode)) vnode = i;
-    }
-    var elm,
-        children = vnode.children,
-        sel = vnode.sel;
-    if (isDef(sel)) {
-      // Parse selector
-      var hashIdx = sel.indexOf('#');
-      var dotIdx = sel.indexOf('.', hashIdx);
-      var hash = hashIdx > 0 ? hashIdx : sel.length;
-      var dot = dotIdx > 0 ? dotIdx : sel.length;
-      var tag = hashIdx !== -1 || dotIdx !== -1 ? sel.slice(0, Math.min(hash, dot)) : sel;
-      elm = vnode.elm = isDef(data) && isDef(i = data.ns) ? document.createElementNS(i, tag) : document.createElement(tag);
-      if (hash < dot) elm.id = sel.slice(hash + 1, dot);
-      if (dotIdx > 0) elm.className = sel.slice(dot + 1).replace(/\./g, ' ');
-      if (is.array(children)) {
-        for (i = 0; i < children.length; ++i) {
-          elm.appendChild(createElm(children[i], insertedVnodeQueue));
-        }
-      } else if (is.primitive(vnode.text)) {
-        elm.appendChild(document.createTextNode(vnode.text));
-      }
-      for (i = 0; i < cbs.create.length; ++i) {
-        cbs.create[i](emptyNode, vnode);
-      }i = vnode.data.hook; // Reuse variable
-      if (isDef(i)) {
-        if (i.create) i.create(emptyNode, vnode);
-        if (i.insert) insertedVnodeQueue.push(vnode);
-      }
-    } else {
-      elm = vnode.elm = document.createTextNode(vnode.text);
-    }
-    return vnode.elm;
-  }
-
-  function addVnodes(parentElm, before, vnodes, startIdx, endIdx, insertedVnodeQueue) {
-    for (; startIdx <= endIdx; ++startIdx) {
-      parentElm.insertBefore(createElm(vnodes[startIdx], insertedVnodeQueue), before);
-    }
-  }
-
-  function invokeDestroyHook(vnode) {
-    var i = vnode.data,
-        j;
-    if (isDef(i)) {
-      if (isDef(i = i.hook) && isDef(i = i.destroy)) i(vnode);
-      for (i = 0; i < cbs.destroy.length; ++i) {
-        cbs.destroy[i](vnode);
-      }if (isDef(i = vnode.children)) {
-        for (j = 0; j < vnode.children.length; ++j) {
-          invokeDestroyHook(vnode.children[j]);
-        }
-      }
-    }
-  }
-
-  function removeVnodes(parentElm, vnodes, startIdx, endIdx) {
-    for (; startIdx <= endIdx; ++startIdx) {
-      var i,
-          listeners,
-          rm,
-          ch = vnodes[startIdx];
-      if (isDef(ch)) {
-        if (isDef(ch.sel)) {
-          invokeDestroyHook(ch);
-          listeners = cbs.remove.length + 1;
-          rm = createRmCb(ch.elm, listeners);
-          for (i = 0; i < cbs.remove.length; ++i) {
-            cbs.remove[i](ch, rm);
-          }if (isDef(i = ch.data) && isDef(i = i.hook) && isDef(i = i.remove)) {
-            i(ch, rm);
-          } else {
-            rm();
-          }
-        } else {
-          // Text node
-          parentElm.removeChild(ch.elm);
-        }
-      }
-    }
-  }
-
-  function updateChildren(parentElm, oldCh, newCh, insertedVnodeQueue) {
-    var oldStartIdx = 0,
-        newStartIdx = 0;
-    var oldEndIdx = oldCh.length - 1;
-    var oldStartVnode = oldCh[0];
-    var oldEndVnode = oldCh[oldEndIdx];
-    var newEndIdx = newCh.length - 1;
-    var newStartVnode = newCh[0];
-    var newEndVnode = newCh[newEndIdx];
-    var oldKeyToIdx, idxInOld, elmToMove, before;
-
-    while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
-      if (isUndef(oldStartVnode)) {
-        oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
-      } else if (isUndef(oldEndVnode)) {
-          oldEndVnode = oldCh[--oldEndIdx];
-        } else if (sameVnode(oldStartVnode, newStartVnode)) {
-          patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue);
-          oldStartVnode = oldCh[++oldStartIdx];
-          newStartVnode = newCh[++newStartIdx];
-        } else if (sameVnode(oldEndVnode, newEndVnode)) {
-          patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue);
-          oldEndVnode = oldCh[--oldEndIdx];
-          newEndVnode = newCh[--newEndIdx];
-        } else if (sameVnode(oldStartVnode, newEndVnode)) {
-          // Vnode moved right
-          patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue);
-          parentElm.insertBefore(oldStartVnode.elm, oldEndVnode.elm.nextSibling);
-          oldStartVnode = oldCh[++oldStartIdx];
-          newEndVnode = newCh[--newEndIdx];
-        } else if (sameVnode(oldEndVnode, newStartVnode)) {
-          // Vnode moved left
-          patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue);
-          parentElm.insertBefore(oldEndVnode.elm, oldStartVnode.elm);
-          oldEndVnode = oldCh[--oldEndIdx];
-          newStartVnode = newCh[++newStartIdx];
-        } else {
-          if (isUndef(oldKeyToIdx)) oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx);
-          idxInOld = oldKeyToIdx[newStartVnode.key];
-          if (isUndef(idxInOld)) {
-            // New element
-            parentElm.insertBefore(createElm(newStartVnode, insertedVnodeQueue), oldStartVnode.elm);
-            newStartVnode = newCh[++newStartIdx];
-          } else {
-            elmToMove = oldCh[idxInOld];
-            patchVnode(elmToMove, newStartVnode, insertedVnodeQueue);
-            oldCh[idxInOld] = undefined;
-            parentElm.insertBefore(elmToMove.elm, oldStartVnode.elm);
-            newStartVnode = newCh[++newStartIdx];
-          }
-        }
-    }
-    if (oldStartIdx > oldEndIdx) {
-      before = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
-      addVnodes(parentElm, before, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
-    } else if (newStartIdx > newEndIdx) {
-      removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
-    }
-  }
-
-  function patchVnode(oldVnode, vnode, insertedVnodeQueue) {
-    var i, hook;
-    if (isDef(i = vnode.data) && isDef(hook = i.hook) && isDef(i = hook.prepatch)) {
-      i(oldVnode, vnode);
-    }
-    if (isDef(i = oldVnode.data) && isDef(i = i.vnode)) oldVnode = i;
-    if (isDef(i = vnode.data) && isDef(i = i.vnode)) vnode = i;
-    var elm = vnode.elm = oldVnode.elm,
-        oldCh = oldVnode.children,
-        ch = vnode.children;
-    if (oldVnode === vnode) return;
-    if (isDef(vnode.data)) {
-      for (i = 0; i < cbs.update.length; ++i) {
-        cbs.update[i](oldVnode, vnode);
-      }i = vnode.data.hook;
-      if (isDef(i) && isDef(i = i.update)) i(oldVnode, vnode);
-    }
-    if (isUndef(vnode.text)) {
-      if (isDef(oldCh) && isDef(ch)) {
-        if (oldCh !== ch) updateChildren(elm, oldCh, ch, insertedVnodeQueue);
-      } else if (isDef(ch)) {
-        addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
-      } else if (isDef(oldCh)) {
-        removeVnodes(elm, oldCh, 0, oldCh.length - 1);
-      }
-    } else if (oldVnode.text !== vnode.text) {
-      elm.textContent = vnode.text;
-    }
-    if (isDef(hook) && isDef(i = hook.postpatch)) {
-      i(oldVnode, vnode);
-    }
-  }
-
-  return function (oldVnode, vnode) {
-    var i;
-    var insertedVnodeQueue = [];
-    for (i = 0; i < cbs.pre.length; ++i) {
-      cbs.pre[i]();
-    }if (oldVnode instanceof Element) {
-      if (oldVnode.parentElement !== null) {
-        createElm(vnode, insertedVnodeQueue);
-        oldVnode.parentElement.replaceChild(vnode.elm, oldVnode);
-      } else {
-        oldVnode = emptyNodeAt(oldVnode);
-        patchVnode(oldVnode, vnode, insertedVnodeQueue);
-      }
-    } else {
-      patchVnode(oldVnode, vnode, insertedVnodeQueue);
-    }
-    for (i = 0; i < insertedVnodeQueue.length; ++i) {
-      insertedVnodeQueue[i].data.hook.insert(insertedVnodeQueue[i]);
-    }
-    for (i = 0; i < cbs.post.length; ++i) {
-      cbs.post[i]();
-    }return vnode;
-  };
-}
-
-module.exports = { init: init };
-
-},{"./is":2,"./vnode":7}],7:[function(require,module,exports){
-"use strict";
-
-module.exports = function (sel, data, children, text, elm) {
-  var key = data === undefined ? undefined : data.key;
-  return { sel: sel, data: data, children: children,
-    text: text, elm: elm, key: key };
-};
-
-},{}],8:[function(require,module,exports){
-'use strict';
-
-var snabbdom = require('../../snabbdom.js');
-var patch = snabbdom.init([require('../../modules/attributes'), require('../../modules/style'), require('../../modules/eventlisteners')]);
-var h = require('../../h.js');
-
-var vnode;
-
-var data = {
-	degRotation: 0
-};
-
-function gRotation() {
-	//console.log("gRotation: %s", data.degRotation);
-	return "rotate(" + data.degRotation + "deg)";
-}
-
-function triangleClick(id) {
-	console.log("triangleClick: %s", id);
-	render();
-}
-
-function handleRotate(degs) {
-	data.degRotation += degs;
-	console.log("handleRotate: %s, %s", degs, data.degRotation);
-	render();
-}
-
-function handleReset(degs) {
-	data.degRotation = degs;
-	console.log("handleReset: %s", degs);
-	render();
-}
-
-function render() {
-	vnode = patch(vnode, view(data));
-}
-
-var hTriangle = function hTriangle(id, degRotation) {
-	return h("polygon#" + id, {
-		attrs: {
-			points: "-50,-88 0,-175 50,-88",
-			transform: "rotate(" + degRotation + ")",
-			"stroke-width": 3
-		},
-		on: { click: [triangleClick, id] }
-	});
-};
-
-var view = function view(data) {
-	return h("div.view", [h("h1", "Snabbdom SVG Carousel"), h("svg", { attrs: { width: 380, height: 380, viewBox: [-190, -190, 380, 380] } }, [h("g#carousel", { style: { "-webkit-transform": gRotation(), transform: gRotation() } }, [hTriangle("yellow", 0), hTriangle("green", 60), hTriangle("magenta", 120), hTriangle("red", 180), hTriangle("cyan", 240), hTriangle("blue", 300)])]), h("button", { on: { click: [handleRotate, 60] } }, "Rotate Clockwise"), h("button", { on: { click: [handleRotate, -60] } }, "Rotate Anticlockwise"), h("button", { on: { click: [handleReset, 0] } }, "Reset")]);
-};
-
-window.addEventListener("DOMContentLoaded", function () {
-	var container = document.getElementById("container");
-	vnode = patch(container, view(data));
-	render();
-});
-
-},{"../../h.js":1,"../../modules/attributes":3,"../../modules/eventlisteners":4,"../../modules/style":5,"../../snabbdom.js":6}]},{},[8]);

libs/snabbdom/examples/carousel-svg/index.html

@@ -1,74 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-	<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
-	<meta charset="utf-8">
-	<title>Carousel</title>
-	<script type="text/javascript" src="build.js"></script>
-	<style type="text/css">
-div.view {
-	margin: 10px;
-}
-h1 {
-	font-size: 24px;
-	color: #505000;
-}
-svg {
-	display: block;
-	margin-bottom: 10px;
-	border: 1px solid gray;
-}
-g#carousel {
-	-webkit-transition: -webkit-transform 1s ease;
-	transition: transform 1s ease;
-}
-polygon {
-	stroke: #808000;
-	transition: fill 0.5s linear;
-}
-polygon#yellow {
-	fill: rgba(255,255,0,0.4);
-}
-polygon#yellow:hover, polygon#yellow:active {
-	fill: yellow;
-}
-polygon#green {
-	fill: rgba(0,128,0,0.4);
-}
-polygon#green:hover, polygon#green:active {
-	fill: green;
-}
-polygon#magenta {
-	fill: rgba(255,0,255,0.4);
-}
-polygon#magenta:hover, polygon#magenta:active {
-	fill: magenta;
-}
-polygon#red {
-	fill: rgba(255,0,0,0.4);
-}
-polygon#red:hover, polygon#red:active {
-	fill: red;
-}
-polygon#cyan {
-	fill: rgba(0,255,255,0.4);
-}
-polygon#cyan:hover, polygon#cyan:active {
-	fill: cyan;
-}
-polygon#blue {
-	fill: rgba(0,0,255,0.4);
-}
-polygon#blue:hover, polygon#blue:active {
-	fill: blue;
-}
-button {
-	font-size: 15px;
-	margin: 0 0.7em 0.7em 0;
-}
-	</style>
-</head>
-<body>
-	<div id="container"></div>
-</body>
-</html>

libs/snabbdom/examples/carousel-svg/script.js

@@ -1,74 +0,0 @@
-var snabbdom = require('../../snabbdom.js');
-var patch = snabbdom.init([
-  require('../../modules/attributes').default,
-  require('../../modules/style').default,
-  require('../../modules/eventlisteners').default
-]);
-var h = require('../../h.js').default;
-
-var vnode;
-
-var data = {
-  degRotation: 0
-};
-
-function gRotation() {
-  //console.log("gRotation: %s", data.degRotation);
-  return "rotate(" + data.degRotation + "deg)";
-}
-
-function triangleClick(id) {
-  console.log("triangleClick: %s", id);
-  render();
-}
-
-function handleRotate(degs) {
-  data.degRotation += degs;
-  console.log("handleRotate: %s, %s", degs, data.degRotation);
-  render();
-}
-
-function handleReset(degs) {
-  data.degRotation = degs;
-  console.log("handleReset: %s", degs);
-  render();
-}
-
-function render() {
-  vnode = patch(vnode, view(data));
-}
-
-const hTriangle = (id, degRotation) =>
-  h("polygon#" + id, {
-    attrs: {
-      points: "-50,-88 0,-175 50,-88",
-      transform: "rotate(" + degRotation + ")",
-      "stroke-width": 3
-    },
-    on: {click: [triangleClick, id]}
-  });
-
-const view = (data) =>
-  h("div.view", [
-    h("h1", "Snabbdom SVG Carousel"),
-    h("svg", {attrs: {width: 380, height: 380, viewBox: [-190, -190, 380, 380]}}, [
-      h("g#carousel",
-        {style: {"-webkit-transform": gRotation(), transform: gRotation()}}, [
-        hTriangle("yellow", 0),
-        hTriangle("green", 60),
-        hTriangle("magenta", 120),
-        hTriangle("red", 180),
-        hTriangle("cyan", 240),
-        hTriangle("blue", 300)
-      ])
-    ]),
-    h("button", {on: {click: [handleRotate, 60]}}, "Rotate Clockwise"),
-    h("button", {on: {click: [handleRotate, -60]}}, "Rotate Anticlockwise"),
-    h("button", {on: {click: [handleReset, 0]}}, "Reset")
-  ]);
-
-window.addEventListener("DOMContentLoaded", () => {
-  var container = document.getElementById("container");
-  vnode = patch(container, view(data));
-  render();
-});

libs/snabbdom/examples/hero/build.js

@@ -1,708 +0,0 @@
-(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
-/* jshint esnext: true */
-'use strict';
-
-var snabbdom = require('../../snabbdom.js');
-var patch = snabbdom.init([require('../../modules/class'), require('../../modules/hero'), require('../../modules/style'), require('../../modules/eventlisteners')]);
-var h = require('../../h.js');
-
-var vnode;
-
-var data = {
-  selected: undefined,
-  movies: [{ rank: 1, title: 'This is an', desc: 'Lorem ipsum dolor sit amet, sed pede integer vitae bibendum, accumsan sit, vulputate aenean tempora ipsum. Lorem sed id et metus, eros posuere suspendisse nec nunc justo, fusce augue placerat nibh purus suspendisse. Aliquam aliquam, ut eget. Mollis a eget sed nibh tincidunt nec, mi integer, proin magna lacus iaculis tortor. Aliquam vel arcu arcu, vivamus a urna fames felis vel wisi, cursus tortor nec erat dignissim cras sem, mauris ac venenatis tellus elit.' }, { rank: 2, title: 'example of', desc: 'Consequuntur ipsum nulla, consequat curabitur in magnis risus. Taciti mattis bibendum tellus nibh, at dui neque eget, odio pede ut, sapien pede, ipsum ut. Sagittis dui, sodales sem, praesent ipsum conubia eget lorem lobortis wisi.' }, { rank: 3, title: 'Snabbdom', desc: 'Quam lorem aliquam fusce wisi, urna purus ipsum pharetra sed, at cras sodales enim vestibulum odio cras, luctus integer phasellus.' }, { rank: 4, title: 'doing hero transitions', desc: 'Et orci hac ultrices id in. Diam ultrices luctus egestas, sem aliquam auctor molestie odio laoreet. Pede nam cubilia, diam vestibulum ornare natoque, aenean etiam fusce id, eget dictum blandit et mauris mauris. Metus amet ad, elit porttitor a aliquet commodo lacus, integer neque imperdiet augue laoreet, nonummy turpis lacus sed pulvinar condimentum platea. Wisi eleifend quis, tristique dictum, ac dictumst. Sem nec tristique vel vehicula fringilla, nibh eu et posuere mi rhoncus.' }, { rank: 5, title: 'using the', desc: 'Pede nam cubilia, diam vestibulum ornare natoque, aenean etiam fusce id, eget dictum blandit et mauris mauris. Metus amet ad, elit porttitor a aliquet commodo lacus, integer neque imperdiet augue laoreet, nonummy turpis lacus sed pulvinar condimentum platea. Wisi eleifend quis, tristique dictum, ac dictumst. Sem nec tristique vel vehicula fringilla, nibh eu et posuere mi rhoncus.' }, { rank: 6, title: 'module for hero transitions', desc: 'Sapien laoreet, ligula elit tortor nulla pellentesque, maecenas enim turpis, quae duis venenatis vivamus ultricies, nunc imperdiet sollicitudin ipsum malesuada. Ut sem. Wisi fusce nullam nibh enim. Nisl hymenaeos id sed sed in. Proin leo et, pulvinar nunc pede laoreet.' }, { rank: 7, title: 'click on ar element in', desc: 'Accumsan quia, id nascetur dui et congue erat, id excepteur, primis ratione nec. At nulla et. Suspendisse lobortis, lobortis in tortor fringilla, duis adipiscing vestibulum voluptates sociosqu auctor.' }, { rank: 8, title: 'the list', desc: 'Ante tellus egestas vel hymenaeos, ut viverra nibh ut, ipsum nibh donec donec dolor. Eros ridiculus vel egestas convallis ipsum, commodo ut venenatis nullam porta iaculis, suspendisse ante proin leo, felis risus etiam.' }, { rank: 9, title: 'to witness', desc: 'Metus amet ad, elit porttitor a aliquet commodo lacus, integer neque imperdiet augue laoreet, nonummy turpis lacus sed pulvinar condimentum platea. Wisi eleifend quis, tristique dictum, ac dictumst.' }, { rank: 10, title: 'the effect', desc: 'Et orci hac ultrices id in. Diam ultrices luctus egestas, sem aliquam auctor molestie odio laoreet. Pede nam cubilia, diam vestibulum ornare natoque, aenean etiam fusce id, eget dictum blandit et mauris mauris' }]
-};
-
-function select(m) {
-  data.selected = m;
-  render();
-}
-
-function render() {
-  vnode = patch(vnode, view(data));
-}
-
-var fadeInOutStyle = {
-  opacity: '0', delayed: { opacity: '1' }, remove: { opacity: '0' }
-};
-
-var detailView = function detailView(movie) {
-  return h('div.page', { style: fadeInOutStyle }, [h('div.header', [h('div.header-content.detail', {
-    style: { opacity: '1', remove: { opacity: '0' } }
-  }, [h('div.rank', [h('span.header-rank.hero', { hero: { id: 'rank' + movie.rank } }, movie.rank), h('div.rank-circle', {
-    style: { transform: 'scale(0)',
-      delayed: { transform: 'scale(1)' },
-      destroy: { transform: 'scale(0)' } }
-  })]), h('div.hero.header-title', { hero: { id: movie.title } }, movie.title), h('div.spacer'), h('div.close', {
-    on: { click: [select, undefined] },
-    style: { transform: 'scale(0)',
-      delayed: { transform: 'scale(1)' },
-      destroy: { transform: 'scale(0)' } }
-  }, 'x')])]), h('div.page-content', [h('div.desc', {
-    style: { opacity: '0', transform: 'translateX(3em)',
-      delayed: { opacity: '1', transform: 'translate(0)' },
-      remove: { opacity: '0', position: 'absolute', top: '0', left: '0',
-        transform: 'translateX(3em)' }
-    }
-  }, [h('h2', 'Description:'), h('span', movie.desc)])])]);
-};
-
-var overviewView = function overviewView(movies) {
-  return h('div.page', { style: fadeInOutStyle }, [h('div.header', [h('div.header-content.overview', {
-    style: fadeInOutStyle
-  }, [h('div.header-title', {
-    style: { transform: 'translateY(-2em)',
-      delayed: { transform: 'translate(0)' },
-      destroy: { transform: 'translateY(-2em)' } }
-  }, 'Top 10 movies'), h('div.spacer')])]), h('div.page-content', [h('div.list', {
-    style: { opacity: '0', delayed: { opacity: '1' },
-      remove: { opacity: '0', position: 'absolute', top: '0', left: '0' } }
-  }, movies.map(function (movie) {
-    return h('div.row', {
-      on: { click: [select, movie] }
-    }, [h('div.hero.rank', [h('span.hero', { hero: { id: 'rank' + movie.rank } }, movie.rank)]), h('div.hero', { hero: { id: movie.title } }, movie.title)]);
-  }))])]);
-};
-
-var view = function view(data) {
-  return h('div.page-container', [data.selected ? detailView(data.selected) : overviewView(data.movies)]);
-};
-
-window.addEventListener('DOMContentLoaded', function () {
-  var container = document.getElementById('container');
-  vnode = patch(container, view(data));
-  render();
-});
-
-},{"../../h.js":2,"../../modules/class":4,"../../modules/eventlisteners":5,"../../modules/hero":6,"../../modules/style":7,"../../snabbdom.js":8}],2:[function(require,module,exports){
-'use strict';
-
-var VNode = require('./vnode');
-var is = require('./is');
-
-function addNS(data, children) {
-  data.ns = 'http://www.w3.org/2000/svg';
-  if (children !== undefined) {
-    for (var i = 0; i < children.length; ++i) {
-      addNS(children[i].data, children[i].children);
-    }
-  }
-}
-
-module.exports = function h(sel, b, c) {
-  var data = {},
-      children,
-      text,
-      i;
-  if (arguments.length === 3) {
-    data = b;
-    if (is.array(c)) {
-      children = c;
-    } else if (is.primitive(c)) {
-      text = c;
-    }
-  } else if (arguments.length === 2) {
-    if (is.array(b)) {
-      children = b;
-    } else if (is.primitive(b)) {
-      text = b;
-    } else {
-      data = b;
-    }
-  }
-  if (is.array(children)) {
-    for (i = 0; i < children.length; ++i) {
-      if (is.primitive(children[i])) children[i] = VNode(undefined, undefined, undefined, children[i]);
-    }
-  }
-  if (sel[0] === 's' && sel[1] === 'v' && sel[2] === 'g') {
-    addNS(data, children);
-  }
-  return VNode(sel, data, children, text, undefined);
-};
-
-},{"./is":3,"./vnode":9}],3:[function(require,module,exports){
-'use strict';
-
-module.exports = {
-  array: Array.isArray,
-  primitive: function primitive(s) {
-    return typeof s === 'string' || typeof s === 'number';
-  }
-};
-
-},{}],4:[function(require,module,exports){
-'use strict';
-
-function updateClass(oldVnode, vnode) {
-  var cur,
-      name,
-      elm = vnode.elm,
-      oldClass = oldVnode.data['class'] || {},
-      klass = vnode.data['class'] || {};
-  for (name in klass) {
-    cur = klass[name];
-    if (cur !== oldClass[name]) {
-      elm.classList[cur ? 'add' : 'remove'](name);
-    }
-  }
-}
-
-module.exports = { create: updateClass, update: updateClass };
-
-},{}],5:[function(require,module,exports){
-'use strict';
-
-var is = require('../is');
-
-function arrInvoker(arr) {
-  return function () {
-    // Special case when length is two, for performance
-    arr.length === 2 ? arr[0](arr[1]) : arr[0].apply(undefined, arr.slice(1));
-  };
-}
-
-function fnInvoker(o) {
-  return function (ev) {
-    o.fn(ev);
-  };
-}
-
-function updateEventListeners(oldVnode, vnode) {
-  var name,
-      cur,
-      old,
-      elm = vnode.elm,
-      oldOn = oldVnode.data.on || {},
-      on = vnode.data.on;
-  if (!on) return;
-  for (name in on) {
-    cur = on[name];
-    old = oldOn[name];
-    if (old === undefined) {
-      if (is.array(cur)) {
-        elm.addEventListener(name, arrInvoker(cur));
-      } else {
-        cur = { fn: cur };
-        on[name] = cur;
-        elm.addEventListener(name, fnInvoker(cur));
-      }
-    } else if (is.array(old)) {
-      // Deliberately modify old array since it's captured in closure created with `arrInvoker`
-      old.length = cur.length;
-      for (var i = 0; i < old.length; ++i) old[i] = cur[i];
-      on[name] = old;
-    } else {
-      old.fn = cur;
-      on[name] = old;
-    }
-  }
-}
-
-module.exports = { create: updateEventListeners, update: updateEventListeners };
-
-},{"../is":3}],6:[function(require,module,exports){
-'use strict';
-
-var raf = window && window.requestAnimationFrame || setTimeout;
-var nextFrame = function nextFrame(fn) {
-  raf(function () {
-    raf(fn);
-  });
-};
-
-function setNextFrame(obj, prop, val) {
-  nextFrame(function () {
-    obj[prop] = val;
-  });
-}
-
-function getTextNodeRect(textNode) {
-  var rect;
-  if (document.createRange) {
-    var range = document.createRange();
-    range.selectNodeContents(textNode);
-    if (range.getBoundingClientRect) {
-      rect = range.getBoundingClientRect();
-    }
-  }
-  return rect;
-}
-
-function calcTransformOrigin(isTextNode, textRect, boundingRect) {
-  if (isTextNode) {
-    if (textRect) {
-      //calculate pixels to center of text from left edge of bounding box
-      var relativeCenterX = textRect.left + textRect.width / 2 - boundingRect.left;
-      var relativeCenterY = textRect.top + textRect.height / 2 - boundingRect.top;
-      return relativeCenterX + 'px ' + relativeCenterY + 'px';
-    }
-  }
-  return '0 0'; //top left
-}
-
-function getTextDx(oldTextRect, newTextRect) {
-  if (oldTextRect && newTextRect) {
-    return oldTextRect.left + oldTextRect.width / 2 - (newTextRect.left + newTextRect.width / 2);
-  }
-  return 0;
-}
-function getTextDy(oldTextRect, newTextRect) {
-  if (oldTextRect && newTextRect) {
-    return oldTextRect.top + oldTextRect.height / 2 - (newTextRect.top + newTextRect.height / 2);
-  }
-  return 0;
-}
-
-function isTextElement(elm) {
-  return elm.childNodes.length === 1 && elm.childNodes[0].nodeType === 3;
-}
-
-var removed, created;
-
-function pre(oldVnode, vnode) {
-  removed = {};
-  created = [];
-}
-
-function create(oldVnode, vnode) {
-  var hero = vnode.data.hero;
-  if (hero && hero.id) {
-    created.push(hero.id);
-    created.push(vnode);
-  }
-}
-
-function destroy(vnode) {
-  var hero = vnode.data.hero;
-  if (hero && hero.id) {
-    var elm = vnode.elm;
-    vnode.isTextNode = isTextElement(elm); //is this a text node?
-    vnode.boundingRect = elm.getBoundingClientRect(); //save the bounding rectangle to a new property on the vnode
-    vnode.textRect = vnode.isTextNode ? getTextNodeRect(elm.childNodes[0]) : null; //save bounding rect of inner text node
-    var computedStyle = window.getComputedStyle(elm, null); //get current styles (includes inherited properties)
-    vnode.savedStyle = JSON.parse(JSON.stringify(computedStyle)); //save a copy of computed style values
-    removed[hero.id] = vnode;
-  }
-}
-
-function post() {
-  var i, id, newElm, oldVnode, oldElm, hRatio, wRatio, oldRect, newRect, dx, dy, origTransform, origTransition, newStyle, oldStyle, newComputedStyle, isTextNode, newTextRect, oldTextRect;
-  for (i = 0; i < created.length; i += 2) {
-    id = created[i];
-    newElm = created[i + 1].elm;
-    oldVnode = removed[id];
-    if (oldVnode) {
-      isTextNode = oldVnode.isTextNode && isTextElement(newElm); //Are old & new both text?
-      newStyle = newElm.style;
-      newComputedStyle = window.getComputedStyle(newElm, null); //get full computed style for new element
-      oldElm = oldVnode.elm;
-      oldStyle = oldElm.style;
-      //Overall element bounding boxes
-      newRect = newElm.getBoundingClientRect();
-      oldRect = oldVnode.boundingRect; //previously saved bounding rect
-      //Text node bounding boxes & distances
-      if (isTextNode) {
-        newTextRect = getTextNodeRect(newElm.childNodes[0]);
-        oldTextRect = oldVnode.textRect;
-        dx = getTextDx(oldTextRect, newTextRect);
-        dy = getTextDy(oldTextRect, newTextRect);
-      } else {
-        //Calculate distances between old & new positions
-        dx = oldRect.left - newRect.left;
-        dy = oldRect.top - newRect.top;
-      }
-      hRatio = newRect.height / Math.max(oldRect.height, 1);
-      wRatio = isTextNode ? hRatio : newRect.width / Math.max(oldRect.width, 1); //text scales based on hRatio
-      // Animate new element
-      origTransform = newStyle.transform;
-      origTransition = newStyle.transition;
-      if (newComputedStyle.display === 'inline') //inline elements cannot be transformed
-        newStyle.display = 'inline-block'; //this does not appear to have any negative side effects
-      newStyle.transition = origTransition + 'transform 0s';
-      newStyle.transformOrigin = calcTransformOrigin(isTextNode, newTextRect, newRect);
-      newStyle.opacity = '0';
-      newStyle.transform = origTransform + 'translate(' + dx + 'px, ' + dy + 'px) ' + 'scale(' + 1 / wRatio + ', ' + 1 / hRatio + ')';
-      setNextFrame(newStyle, 'transition', origTransition);
-      setNextFrame(newStyle, 'transform', origTransform);
-      setNextFrame(newStyle, 'opacity', '1');
-      // Animate old element
-      for (var key in oldVnode.savedStyle) {
-        //re-apply saved inherited properties
-        if (parseInt(key) != key) {
-          var ms = key.substring(0, 2) === 'ms';
-          var moz = key.substring(0, 3) === 'moz';
-          var webkit = key.substring(0, 6) === 'webkit';
-          if (!ms && !moz && !webkit) //ignore prefixed style properties
-            oldStyle[key] = oldVnode.savedStyle[key];
-        }
-      }
-      oldStyle.position = 'absolute';
-      oldStyle.top = oldRect.top + 'px'; //start at existing position
-      oldStyle.left = oldRect.left + 'px';
-      oldStyle.width = oldRect.width + 'px'; //Needed for elements who were sized relative to their parents
-      oldStyle.height = oldRect.height + 'px'; //Needed for elements who were sized relative to their parents
-      oldStyle.margin = 0; //Margin on hero element leads to incorrect positioning
-      oldStyle.transformOrigin = calcTransformOrigin(isTextNode, oldTextRect, oldRect);
-      oldStyle.transform = '';
-      oldStyle.opacity = '1';
-      document.body.appendChild(oldElm);
-      setNextFrame(oldStyle, 'transform', 'translate(' + -dx + 'px, ' + -dy + 'px) scale(' + wRatio + ', ' + hRatio + ')'); //scale must be on far right for translate to be correct
-      setNextFrame(oldStyle, 'opacity', '0');
-      oldElm.addEventListener('transitionend', function (ev) {
-        if (ev.propertyName === 'transform') document.body.removeChild(ev.target);
-      });
-    }
-  }
-  removed = created = undefined;
-}
-
-module.exports = { pre: pre, create: create, destroy: destroy, post: post };
-
-},{}],7:[function(require,module,exports){
-'use strict';
-
-var raf = requestAnimationFrame || setTimeout;
-var nextFrame = function nextFrame(fn) {
-  raf(function () {
-    raf(fn);
-  });
-};
-
-function setNextFrame(obj, prop, val) {
-  nextFrame(function () {
-    obj[prop] = val;
-  });
-}
-
-function updateStyle(oldVnode, vnode) {
-  var cur,
-      name,
-      elm = vnode.elm,
-      oldStyle = oldVnode.data.style || {},
-      style = vnode.data.style || {},
-      oldHasDel = ('delayed' in oldStyle);
-  for (name in style) {
-    cur = style[name];
-    if (name === 'delayed') {
-      for (name in style.delayed) {
-        cur = style.delayed[name];
-        if (!oldHasDel || cur !== oldStyle.delayed[name]) {
-          setNextFrame(elm.style, name, cur);
-        }
-      }
-    } else if (name !== 'remove' && cur !== oldStyle[name]) {
-      elm.style[name] = cur;
-    }
-  }
-}
-
-function applyDestroyStyle(vnode) {
-  var style,
-      name,
-      elm = vnode.elm,
-      s = vnode.data.style;
-  if (!s || !(style = s.destroy)) return;
-  for (name in style) {
-    elm.style[name] = style[name];
-  }
-}
-
-function applyRemoveStyle(vnode, rm) {
-  var s = vnode.data.style;
-  if (!s || !s.remove) {
-    rm();
-    return;
-  }
-  var name,
-      elm = vnode.elm,
-      idx,
-      i = 0,
-      maxDur = 0,
-      compStyle,
-      style = s.remove,
-      amount = 0,
-      applied = [];
-  for (name in style) {
-    applied.push(name);
-    elm.style[name] = style[name];
-  }
-  compStyle = getComputedStyle(elm);
-  var props = compStyle['transition-property'].split(', ');
-  for (; i < props.length; ++i) {
-    if (applied.indexOf(props[i]) !== -1) amount++;
-  }
-  elm.addEventListener('transitionend', function (ev) {
-    if (ev.target === elm) --amount;
-    if (amount === 0) rm();
-  });
-}
-
-module.exports = { create: updateStyle, update: updateStyle, destroy: applyDestroyStyle, remove: applyRemoveStyle };
-
-},{}],8:[function(require,module,exports){
-// jshint newcap: false
-/* global require, module, document, Element */
-'use strict';
-
-var VNode = require('./vnode');
-var is = require('./is');
-
-function isUndef(s) {
-  return s === undefined;
-}
-function isDef(s) {
-  return s !== undefined;
-}
-
-function emptyNodeAt(elm) {
-  return VNode(elm.tagName, {}, [], undefined, elm);
-}
-
-var emptyNode = VNode('', {}, [], undefined, undefined);
-
-function sameVnode(vnode1, vnode2) {
-  return vnode1.key === vnode2.key && vnode1.sel === vnode2.sel;
-}
-
-function createKeyToOldIdx(children, beginIdx, endIdx) {
-  var i,
-      map = {},
-      key;
-  for (i = beginIdx; i <= endIdx; ++i) {
-    key = children[i].key;
-    if (isDef(key)) map[key] = i;
-  }
-  return map;
-}
-
-function createRmCb(childElm, listeners) {
-  return function () {
-    if (--listeners === 0) childElm.parentElement.removeChild(childElm);
-  };
-}
-
-var hooks = ['create', 'update', 'remove', 'destroy', 'pre', 'post'];
-
-function init(modules) {
-  var i,
-      j,
-      cbs = {};
-  for (i = 0; i < hooks.length; ++i) {
-    cbs[hooks[i]] = [];
-    for (j = 0; j < modules.length; ++j) {
-      if (modules[j][hooks[i]] !== undefined) cbs[hooks[i]].push(modules[j][hooks[i]]);
-    }
-  }
-
-  function createElm(vnode, insertedVnodeQueue) {
-    var i,
-        data = vnode.data;
-    if (isDef(data)) {
-      if (isDef(i = data.hook) && isDef(i = i.init)) i(vnode);
-      if (isDef(i = data.vnode)) vnode = i;
-    }
-    var elm,
-        children = vnode.children,
-        sel = vnode.sel;
-    if (isDef(sel)) {
-      // Parse selector
-      var hashIdx = sel.indexOf('#');
-      var dotIdx = sel.indexOf('.', hashIdx);
-      var hash = hashIdx > 0 ? hashIdx : sel.length;
-      var dot = dotIdx > 0 ? dotIdx : sel.length;
-      var tag = hashIdx !== -1 || dotIdx !== -1 ? sel.slice(0, Math.min(hash, dot)) : sel;
-      elm = vnode.elm = isDef(data) && isDef(i = data.ns) ? document.createElementNS(i, tag) : document.createElement(tag);
-      if (hash < dot) elm.id = sel.slice(hash + 1, dot);
-      if (dotIdx > 0) elm.className = sel.slice(dot + 1).replace(/\./g, ' ');
-      if (is.array(children)) {
-        for (i = 0; i < children.length; ++i) {
-          elm.appendChild(createElm(children[i], insertedVnodeQueue));
-        }
-      } else if (is.primitive(vnode.text)) {
-        elm.appendChild(document.createTextNode(vnode.text));
-      }
-      for (i = 0; i < cbs.create.length; ++i) cbs.create[i](emptyNode, vnode);
-      i = vnode.data.hook; // Reuse variable
-      if (isDef(i)) {
-        if (i.create) i.create(emptyNode, vnode);
-        if (i.insert) insertedVnodeQueue.push(vnode);
-      }
-    } else {
-      elm = vnode.elm = document.createTextNode(vnode.text);
-    }
-    return vnode.elm;
-  }
-
-  function addVnodes(parentElm, before, vnodes, startIdx, endIdx, insertedVnodeQueue) {
-    for (; startIdx <= endIdx; ++startIdx) {
-      parentElm.insertBefore(createElm(vnodes[startIdx], insertedVnodeQueue), before);
-    }
-  }
-
-  function invokeDestroyHook(vnode) {
-    var i = vnode.data,
-        j;
-    if (isDef(i)) {
-      if (isDef(i = i.hook) && isDef(i = i.destroy)) i(vnode);
-      for (i = 0; i < cbs.destroy.length; ++i) cbs.destroy[i](vnode);
-      if (isDef(i = vnode.children)) {
-        for (j = 0; j < vnode.children.length; ++j) {
-          invokeDestroyHook(vnode.children[j]);
-        }
-      }
-    }
-  }
-
-  function removeVnodes(parentElm, vnodes, startIdx, endIdx) {
-    for (; startIdx <= endIdx; ++startIdx) {
-      var i,
-          listeners,
-          rm,
-          ch = vnodes[startIdx];
-      if (isDef(ch)) {
-        if (isDef(ch.sel)) {
-          invokeDestroyHook(ch);
-          listeners = cbs.remove.length + 1;
-          rm = createRmCb(ch.elm, listeners);
-          for (i = 0; i < cbs.remove.length; ++i) cbs.remove[i](ch, rm);
-          if (isDef(i = ch.data) && isDef(i = i.hook) && isDef(i = i.remove)) {
-            i(ch, rm);
-          } else {
-            rm();
-          }
-        } else {
-          // Text node
-          parentElm.removeChild(ch.elm);
-        }
-      }
-    }
-  }
-
-  function updateChildren(parentElm, oldCh, newCh, insertedVnodeQueue) {
-    var oldStartIdx = 0,
-        newStartIdx = 0;
-    var oldEndIdx = oldCh.length - 1;
-    var oldStartVnode = oldCh[0];
-    var oldEndVnode = oldCh[oldEndIdx];
-    var newEndIdx = newCh.length - 1;
-    var newStartVnode = newCh[0];
-    var newEndVnode = newCh[newEndIdx];
-    var oldKeyToIdx, idxInOld, elmToMove, before;
-
-    while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
-      if (isUndef(oldStartVnode)) {
-        oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
-      } else if (isUndef(oldEndVnode)) {
-          oldEndVnode = oldCh[--oldEndIdx];
-        } else if (sameVnode(oldStartVnode, newStartVnode)) {
-          patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue);
-          oldStartVnode = oldCh[++oldStartIdx];
-          newStartVnode = newCh[++newStartIdx];
-        } else if (sameVnode(oldEndVnode, newEndVnode)) {
-          patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue);
-          oldEndVnode = oldCh[--oldEndIdx];
-          newEndVnode = newCh[--newEndIdx];
-        } else if (sameVnode(oldStartVnode, newEndVnode)) {
-          // Vnode moved right
-          patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue);
-          parentElm.insertBefore(oldStartVnode.elm, oldEndVnode.elm.nextSibling);
-          oldStartVnode = oldCh[++oldStartIdx];
-          newEndVnode = newCh[--newEndIdx];
-        } else if (sameVnode(oldEndVnode, newStartVnode)) {
-          // Vnode moved left
-          patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue);
-          parentElm.insertBefore(oldEndVnode.elm, oldStartVnode.elm);
-          oldEndVnode = oldCh[--oldEndIdx];
-          newStartVnode = newCh[++newStartIdx];
-        } else {
-          if (isUndef(oldKeyToIdx)) oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx);
-          idxInOld = oldKeyToIdx[newStartVnode.key];
-          if (isUndef(idxInOld)) {
-            // New element
-            parentElm.insertBefore(createElm(newStartVnode, insertedVnodeQueue), oldStartVnode.elm);
-            newStartVnode = newCh[++newStartIdx];
-          } else {
-            elmToMove = oldCh[idxInOld];
-            patchVnode(elmToMove, newStartVnode, insertedVnodeQueue);
-            oldCh[idxInOld] = undefined;
-            parentElm.insertBefore(elmToMove.elm, oldStartVnode.elm);
-            newStartVnode = newCh[++newStartIdx];
-          }
-        }
-    }
-    if (oldStartIdx > oldEndIdx) {
-      before = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
-      addVnodes(parentElm, before, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
-    } else if (newStartIdx > newEndIdx) {
-      removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
-    }
-  }
-
-  function patchVnode(oldVnode, vnode, insertedVnodeQueue) {
-    var i, hook;
-    if (isDef(i = vnode.data) && isDef(hook = i.hook) && isDef(i = hook.prepatch)) {
-      i(oldVnode, vnode);
-    }
-    if (isDef(i = oldVnode.data) && isDef(i = i.vnode)) oldVnode = i;
-    if (isDef(i = vnode.data) && isDef(i = i.vnode)) vnode = i;
-    var elm = vnode.elm = oldVnode.elm,
-        oldCh = oldVnode.children,
-        ch = vnode.children;
-    if (oldVnode === vnode) return;
-    if (isDef(vnode.data)) {
-      for (i = 0; i < cbs.update.length; ++i) cbs.update[i](oldVnode, vnode);
-      i = vnode.data.hook;
-      if (isDef(i) && isDef(i = i.update)) i(oldVnode, vnode);
-    }
-    if (isUndef(vnode.text)) {
-      if (isDef(oldCh) && isDef(ch)) {
-        if (oldCh !== ch) updateChildren(elm, oldCh, ch, insertedVnodeQueue);
-      } else if (isDef(ch)) {
-        addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
-      } else if (isDef(oldCh)) {
-        removeVnodes(elm, oldCh, 0, oldCh.length - 1);
-      }
-    } else if (oldVnode.text !== vnode.text) {
-      elm.textContent = vnode.text;
-    }
-    if (isDef(hook) && isDef(i = hook.postpatch)) {
-      i(oldVnode, vnode);
-    }
-  }
-
-  return function (oldVnode, vnode) {
-    var i;
-    var insertedVnodeQueue = [];
-    for (i = 0; i < cbs.pre.length; ++i) cbs.pre[i]();
-    if (oldVnode instanceof Element) {
-      if (oldVnode.parentElement !== null) {
-        createElm(vnode, insertedVnodeQueue);
-        oldVnode.parentElement.replaceChild(vnode.elm, oldVnode);
-      } else {
-        oldVnode = emptyNodeAt(oldVnode);
-        patchVnode(oldVnode, vnode, insertedVnodeQueue);
-      }
-    } else {
-      patchVnode(oldVnode, vnode, insertedVnodeQueue);
-    }
-    for (i = 0; i < insertedVnodeQueue.length; ++i) {
-      insertedVnodeQueue[i].data.hook.insert(insertedVnodeQueue[i]);
-    }
-    for (i = 0; i < cbs.post.length; ++i) cbs.post[i]();
-    return vnode;
-  };
-}
-
-module.exports = { init: init };
-
-},{"./is":3,"./vnode":9}],9:[function(require,module,exports){
-"use strict";
-
-module.exports = function (sel, data, children, text, elm) {
-  var key = data === undefined ? undefined : data.key;
-  return { sel: sel, data: data, children: children,
-    text: text, elm: elm, key: key };
-};
-
-},{}]},{},[1]);

libs/snabbdom/examples/hero/index.html

@@ -1,166 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
-    <title>Hero animation</title>
-    <script type="text/javascript" src="build.js"></script>
-    <style>
-      {
-        -webkit-tap-highlight-color: rgba(0, 0, 0, 0);  
-      }
-      html, body {
-        height: 100%;
-        margin: 0;
-      }
-      body {
-        background: #fff;
-        font-family: sans-serif;
-      }
-      .page-container {
-        width: 100%;
-        position: relative;
-        background: #fff;
-      }
-      @media (min-width: 28em),
-      @media (min-height: 38em) {
-        body {
-          display: flex;
-          flex-direction: column;
-          align-items: center;
-          justify-content: center;
-          background: #aaaaaa;
-          position: relative;
-        }
-        .page-container {
-          box-shadow: 0 0 1em rgba(0, 0, 0, .5);
-          width: 28em;
-          min-height: 38em;
-          height: 38em;
-        }
-      }
-      .page {
-        background: #fff;
-        transition: opacity 0.4s ease-in-out,
-                    transform 0.4s ease-in-out;
-        width: 100%;
-        height: 100%;
-      }
-      h2 {
-        font-size: 1.1em;
-        margin: .2em 0;
-      }
-      .header {
-        height: 3.5em;
-        background: #1293ea;
-        overflow: hidden;
-      }
-      .header-content {
-        width: 100%;
-        box-sizing: border-box;
-        padding: .4em .8em;
-        color: #fff;
-        display: flex;
-        align-items: center;
-        position: absolute;
-        transition: opacity 0.4s ease-in-out,
-                    transform 0.4s ease-in-out;
-      }
-      .header h1 {
-        font-weight: normal;
-        margin: 0;
-        font-size: 1.5em;
-        line-height: 1.8em;
-      }
-      .header-title {
-        color: #fff;
-        font-size: 1.5em;
-        line-height: 1.8em;
-        transition: transform 0.4s ease-in-out;
-        overflow: hidden;
-        text-overflow: ellipsis;
-        white-space: nowrap;
-      }
-      .header .rank {
-        display: flex;
-        flex-direction: column;
-        align-items: center;
-        justify-content: center;
-        width: 2.7em;
-        height: 2.7em;
-        margin-right: .5em;
-        position: relative;
-      }
-      .header .rank-circle {
-        position: absolute;
-        background: #fff;
-        width: 2.7em;
-        height: 2.7em;
-        border-radius: 1.35em;
-        margin-right: .5em;
-        transition: transform 0.4s ease-in-out;
-        top: 0;
-        left: 0;
-      }
-      .header-rank {
-        z-index: 2;
-        color: #1293ea;
-        font-size: 1.5em;
-      }
-      .header .close {
-        line-height: 1.8em;
-        cursor: pointer;
-        text-align: center;
-        width: 1.8em;
-        height: 1.8em;
-        border-radius: .9em;
-        background: rgba(0, 0, 0, .5);
-        transition: transform 0.4s ease-in-out;
-      }
-      .hero {
-        transition: transform 0.4s ease-in-out,
-                    opacity 0.4s ease-in-out;
-      }
-      .page-content {
-        position: relative;
-        overflow: hidden;
-        width: 100%;
-        height: calc(100% - 3.5em);
-      }
-      .list {
-        position: absolute;
-        width: 100%;
-        transition: transform 0.4s ease-in-out,
-                    opacity 0.4s ease-in-out;
-      }
-      .desc {
-        position: absolute;
-        transition: transform 0.4s ease-in-out,
-                    opacity 0.4s ease-in-out;
-        padding: 1em;
-      }
-      .spacer {
-        flex: 1;
-      }
-      .row {
-        cursor: pointer;
-        box-sizing: border-box;
-        padding: 1em;
-      }
-      .row:not(:first-child) {
-        border-top: 1px solid #eeeeee;
-      }
-      .row div {
-        display: inline-block;
-      }
-      .row > div:nth-child(1) {
-        text-align: center;
-        margin-right: 1em;
-        width: 1em;
-      }
-    </style>
-  </head>
-  <body>
-    <div id="container"></div>
-  </body>
-</html>

libs/snabbdom/examples/hero/script.js

@@ -1,120 +0,0 @@
-/* jshint esnext: true */
-var snabbdom = require('../../snabbdom.js');
-var patch = snabbdom.init([
-  require('../../modules/class').default,
-  require('../../modules/hero').default,
-  require('../../modules/style').default,
-  require('../../modules/eventlisteners').default,
-]);
-var h = require('../../h.js').default;
-
-var vnode;
-
-var data = {
-  selected: undefined,
-  movies: [
-    {rank: 1, title: 'This is an', desc: 'Lorem ipsum dolor sit amet, sed pede integer vitae bibendum, accumsan sit, vulputate aenean tempora ipsum. Lorem sed id et metus, eros posuere suspendisse nec nunc justo, fusce augue placerat nibh purus suspendisse. Aliquam aliquam, ut eget. Mollis a eget sed nibh tincidunt nec, mi integer, proin magna lacus iaculis tortor. Aliquam vel arcu arcu, vivamus a urna fames felis vel wisi, cursus tortor nec erat dignissim cras sem, mauris ac venenatis tellus elit.'},
-    {rank: 2, title: 'example of', desc: 'Consequuntur ipsum nulla, consequat curabitur in magnis risus. Taciti mattis bibendum tellus nibh, at dui neque eget, odio pede ut, sapien pede, ipsum ut. Sagittis dui, sodales sem, praesent ipsum conubia eget lorem lobortis wisi.'},
-    {rank: 3, title: 'Snabbdom', desc: 'Quam lorem aliquam fusce wisi, urna purus ipsum pharetra sed, at cras sodales enim vestibulum odio cras, luctus integer phasellus.'},
-    {rank: 4, title: 'doing hero transitions', desc: 'Et orci hac ultrices id in. Diam ultrices luctus egestas, sem aliquam auctor molestie odio laoreet. Pede nam cubilia, diam vestibulum ornare natoque, aenean etiam fusce id, eget dictum blandit et mauris mauris. Metus amet ad, elit porttitor a aliquet commodo lacus, integer neque imperdiet augue laoreet, nonummy turpis lacus sed pulvinar condimentum platea. Wisi eleifend quis, tristique dictum, ac dictumst. Sem nec tristique vel vehicula fringilla, nibh eu et posuere mi rhoncus.'},
-    {rank: 5, title: 'using the', desc: 'Pede nam cubilia, diam vestibulum ornare natoque, aenean etiam fusce id, eget dictum blandit et mauris mauris. Metus amet ad, elit porttitor a aliquet commodo lacus, integer neque imperdiet augue laoreet, nonummy turpis lacus sed pulvinar condimentum platea. Wisi eleifend quis, tristique dictum, ac dictumst. Sem nec tristique vel vehicula fringilla, nibh eu et posuere mi rhoncus.'},
-    {rank: 6, title: 'module for hero transitions', desc: 'Sapien laoreet, ligula elit tortor nulla pellentesque, maecenas enim turpis, quae duis venenatis vivamus ultricies, nunc imperdiet sollicitudin ipsum malesuada. Ut sem. Wisi fusce nullam nibh enim. Nisl hymenaeos id sed sed in. Proin leo et, pulvinar nunc pede laoreet.'},
-    {rank: 7, title: 'click on ar element in', desc: 'Accumsan quia, id nascetur dui et congue erat, id excepteur, primis ratione nec. At nulla et. Suspendisse lobortis, lobortis in tortor fringilla, duis adipiscing vestibulum voluptates sociosqu auctor.'},
-    {rank: 8, title: 'the list', desc: 'Ante tellus egestas vel hymenaeos, ut viverra nibh ut, ipsum nibh donec donec dolor. Eros ridiculus vel egestas convallis ipsum, commodo ut venenatis nullam porta iaculis, suspendisse ante proin leo, felis risus etiam.'},
-    {rank: 9, title: 'to witness', desc: 'Metus amet ad, elit porttitor a aliquet commodo lacus, integer neque imperdiet augue laoreet, nonummy turpis lacus sed pulvinar condimentum platea. Wisi eleifend quis, tristique dictum, ac dictumst.'},
-    {rank: 10, title: 'the effect', desc: 'Et orci hac ultrices id in. Diam ultrices luctus egestas, sem aliquam auctor molestie odio laoreet. Pede nam cubilia, diam vestibulum ornare natoque, aenean etiam fusce id, eget dictum blandit et mauris mauris'},
-  ]
-};
-
-function select(m) {
-  data.selected = m;
-  render();
-}
-
-function render() {
-  vnode = patch(vnode, view(data));
-}
-
-const fadeInOutStyle = {
-  opacity: '0', delayed: {opacity: '1'}, remove: {opacity: '0'}
-};
-
-const detailView = (movie) =>
-  h('div.page', {style: fadeInOutStyle}, [
-    h('div.header', [
-      h('div.header-content.detail', {
-        style: {opacity: '1', remove: {opacity: '0'}},
-      }, [
-        h('div.rank', [
-          h('span.header-rank.hero', {hero: {id: 'rank'+movie.rank}}, movie.rank),
-          h('div.rank-circle', {
-            style: {transform: 'scale(0)',
-                    delayed: {transform: 'scale(1)'},
-                    destroy: {transform: 'scale(0)'}},
-          }),
-        ]),
-        h('div.hero.header-title', {hero: {id: movie.title}}, movie.title),
-        h('div.spacer'),
-        h('div.close', {
-          on: {click: [select, undefined]},
-          style: {transform: 'scale(0)',
-                  delayed: {transform: 'scale(1)'},
-                  destroy: {transform: 'scale(0)'}},
-        }, 'x'),
-      ]),
-    ]),
-    h('div.page-content', [
-      h('div.desc', {
-        style: {opacity: '0', transform: 'translateX(3em)',
-                delayed: {opacity: '1', transform: 'translate(0)'},
-                remove: {opacity: '0', position: 'absolute', top: '0', left: '0',
-                         transform: 'translateX(3em)'}
-        }
-      }, [
-        h('h2', 'Description:'),
-        h('span', movie.desc),
-      ]),
-    ]),
-  ]);
-
-const overviewView = (movies) =>
-  h('div.page', {style: fadeInOutStyle}, [
-    h('div.header', [
-      h('div.header-content.overview', {
-        style: fadeInOutStyle,
-      }, [
-        h('div.header-title', {
-          style: {transform: 'translateY(-2em)',
-                  delayed: {transform: 'translate(0)'},
-                  destroy: {transform: 'translateY(-2em)'}}
-        }, 'Top 10 movies'),
-        h('div.spacer'),
-      ]),
-    ]),
-    h('div.page-content', [
-      h('div.list', {
-        style: {opacity: '0', delayed: {opacity: '1'},
-                remove: {opacity: '0', position: 'absolute', top: '0', left: '0'}}
-      }, movies.map((movie) =>
-        h('div.row', {
-          on: {click: [select, movie]},
-        }, [
-          h('div.hero.rank', [
-            h('span.hero', {hero: {id: 'rank'+movie.rank}}, movie.rank)
-          ]),
-          h('div.hero', {hero: {id: movie.title}}, movie.title)
-        ])
-      )),
-    ]),
-  ]);
-
-const view = (data) =>
-  h('div.page-container', [
-    data.selected ? detailView(data.selected) : overviewView(data.movies),
-  ]);
-
-window.addEventListener('DOMContentLoaded', () => {
-  var container = document.getElementById('container');
-  vnode = patch(container, view(data));
-  render();
-});

libs/snabbdom/examples/reorder-animation/build.js

@@ -1,523 +0,0 @@
-(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
-'use strict';
-
-var snabbdom = require('../../snabbdom.js');
-var patch = snabbdom.init([require('../../modules/class'), require('../../modules/props'), require('../../modules/style'), require('../../modules/eventlisteners')]);
-var h = require('../../h.js');
-
-var vnode;
-
-var nextKey = 11;
-var margin = 8;
-var sortBy = 'rank';
-var totalHeight = 0;
-var originalData = [{ rank: 1, title: 'The Shawshank Redemption', desc: 'Two imprisoned men bond over a number of years, finding solace and eventual redemption through acts of common decency.', elmHeight: 0 }, { rank: 2, title: 'The Godfather', desc: 'The aging patriarch of an organized crime dynasty transfers control of his clandestine empire to his reluctant son.', elmHeight: 0 }, { rank: 3, title: 'The Godfather: Part II', desc: 'The early life and career of Vito Corleone in 1920s New York is portrayed while his son, Michael, expands and tightens his grip on his crime syndicate stretching from Lake Tahoe, Nevada to pre-revolution 1958 Cuba.', elmHeight: 0 }, { rank: 4, title: 'The Dark Knight', desc: 'When the menace known as the Joker wreaks havoc and chaos on the people of Gotham, the caped crusader must come to terms with one of the greatest psychological tests of his ability to fight injustice.', elmHeight: 0 }, { rank: 5, title: 'Pulp Fiction', desc: 'The lives of two mob hit men, a boxer, a gangster\'s wife, and a pair of diner bandits intertwine in four tales of violence and redemption.', elmHeight: 0 }, { rank: 6, title: 'Schindler\'s List', desc: 'In Poland during World War II, Oskar Schindler gradually becomes concerned for his Jewish workforce after witnessing their persecution by the Nazis.', elmHeight: 0 }, { rank: 7, title: '12 Angry Men', desc: 'A dissenting juror in a murder trial slowly manages to convince the others that the case is not as obviously clear as it seemed in court.', elmHeight: 0 }, { rank: 8, title: 'The Good, the Bad and the Ugly', desc: 'A bounty hunting scam joins two men in an uneasy alliance against a third in a race to find a fortune in gold buried in a remote cemetery.', elmHeight: 0 }, { rank: 9, title: 'The Lord of the Rings: The Return of the King', desc: 'Gandalf and Aragorn lead the World of Men against Sauron\'s army to draw his gaze from Frodo and Sam as they approach Mount Doom with the One Ring.', elmHeight: 0 }, { rank: 10, title: 'Fight Club', desc: 'An insomniac office worker looking for a way to change his life crosses paths with a devil-may-care soap maker and they form an underground fight club that evolves into something much, much more...', elmHeight: 0 }];
-var data = [originalData[0], originalData[1], originalData[2], originalData[3], originalData[4], originalData[5], originalData[6], originalData[7], originalData[8], originalData[9]];
-
-function changeSort(prop) {
-  sortBy = prop;
-  data.sort(function (a, b) {
-    if (a[prop] > b[prop]) {
-      return 1;
-    }
-    if (a[prop] < b[prop]) {
-      return -1;
-    }
-    return 0;
-  });
-  render();
-}
-
-function add() {
-  var n = originalData[Math.floor(Math.random() * 10)];
-  data = [{ rank: nextKey++, title: n.title, desc: n.desc, elmHeight: 0 }].concat(data);
-  render();
-  render();
-}
-
-function remove(movie) {
-  data = data.filter(function (m) {
-    return m !== movie;
-  });
-  render();
-}
-
-function movieView(movie) {
-  return h('div.row', {
-    key: movie.rank,
-    style: { opacity: '0', transform: 'translate(-200px)',
-      delayed: { transform: 'translateY(' + movie.offset + 'px)', opacity: '1' },
-      remove: { opacity: '0', transform: 'translateY(' + movie.offset + 'px) translateX(200px)' } },
-    hook: { insert: function insert(vnode) {
-        movie.elmHeight = vnode.elm.offsetHeight;
-      } } }, [h('div', { style: { fontWeight: 'bold' } }, movie.rank), h('div', movie.title), h('div', movie.desc), h('div.btn.rm-btn', { on: { click: [remove, movie] } }, 'x')]);
-}
-
-function render() {
-  data = data.reduce(function (acc, m) {
-    var last = acc[acc.length - 1];
-    m.offset = last ? last.offset + last.elmHeight + margin : margin;
-    return acc.concat(m);
-  }, []);
-  totalHeight = data[data.length - 1].offset + data[data.length - 1].elmHeight;
-  vnode = patch(vnode, view(data));
-}
-
-function view(data) {
-  return h('div', [h('h1', 'Top 10 movies'), h('div', [h('a.btn.add', { on: { click: add } }, 'Add'), 'Sort by: ', h('span.btn-group', [h('a.btn.rank', { 'class': { active: sortBy === 'rank' }, on: { click: [changeSort, 'rank'] } }, 'Rank'), h('a.btn.title', { 'class': { active: sortBy === 'title' }, on: { click: [changeSort, 'title'] } }, 'Title'), h('a.btn.desc', { 'class': { active: sortBy === 'desc' }, on: { click: [changeSort, 'desc'] } }, 'Description')])]), h('div.list', { style: { height: totalHeight + 'px' } }, data.map(movieView))]);
-}
-
-window.addEventListener('DOMContentLoaded', function () {
-  var container = document.getElementById('container');
-  vnode = patch(container, view(data));
-  render();
-});
-
-},{"../../h.js":2,"../../modules/class":4,"../../modules/eventlisteners":5,"../../modules/props":6,"../../modules/style":7,"../../snabbdom.js":8}],2:[function(require,module,exports){
-'use strict';
-
-var VNode = require('./vnode');
-var is = require('./is');
-
-module.exports = function h(sel, b, c) {
-  var data = {},
-      children,
-      text,
-      i;
-  if (arguments.length === 3) {
-    data = b;
-    if (is.array(c)) {
-      children = c;
-    } else if (is.primitive(c)) {
-      text = c;
-    }
-  } else if (arguments.length === 2) {
-    if (is.array(b)) {
-      children = b;
-    } else if (is.primitive(b)) {
-      text = b;
-    } else {
-      data = b;
-    }
-  }
-  if (is.array(children)) {
-    for (i = 0; i < children.length; ++i) {
-      if (is.primitive(children[i])) children[i] = VNode(undefined, undefined, undefined, children[i]);
-    }
-  }
-  return VNode(sel, data, children, text, undefined);
-};
-
-},{"./is":3,"./vnode":9}],3:[function(require,module,exports){
-'use strict';
-
-module.exports = {
-  array: Array.isArray,
-  primitive: function primitive(s) {
-    return typeof s === 'string' || typeof s === 'number';
-  } };
-
-},{}],4:[function(require,module,exports){
-'use strict';
-
-function updateClass(oldVnode, vnode) {
-  var cur,
-      name,
-      elm = vnode.elm,
-      oldClass = oldVnode.data['class'] || {},
-      klass = vnode.data['class'] || {};
-  for (name in klass) {
-    cur = klass[name];
-    if (cur !== oldClass[name]) {
-      elm.classList[cur ? 'add' : 'remove'](name);
-    }
-  }
-}
-
-module.exports = { create: updateClass, update: updateClass };
-
-},{}],5:[function(require,module,exports){
-'use strict';
-
-var is = require('../is');
-
-function arrInvoker(arr) {
-  return function () {
-    arr[0](arr[1]);
-  };
-}
-
-function updateEventListeners(oldVnode, vnode) {
-  var name,
-      cur,
-      old,
-      elm = vnode.elm,
-      oldOn = oldVnode.data.on || {},
-      on = vnode.data.on;
-  if (!on) return;
-  for (name in on) {
-    cur = on[name];
-    old = oldOn[name];
-    if (old === undefined) {
-      elm.addEventListener(name, is.array(cur) ? arrInvoker(cur) : cur);
-    } else if (is.array(old)) {
-      old[0] = cur[0]; // Deliberately modify old array since it's
-      old[1] = cur[1]; // captured in closure created with `arrInvoker`
-    }
-  }
-}
-
-module.exports = { create: updateEventListeners, update: updateEventListeners };
-
-},{"../is":3}],6:[function(require,module,exports){
-"use strict";
-
-function updateProps(oldVnode, vnode) {
-  var key,
-      cur,
-      old,
-      elm = vnode.elm,
-      oldProps = oldVnode.data.props || {},
-      props = vnode.data.props || {};
-  for (key in props) {
-    cur = props[key];
-    old = oldProps[key];
-    if (old !== cur) {
-      elm[key] = cur;
-    }
-  }
-}
-
-module.exports = { create: updateProps, update: updateProps };
-
-},{}],7:[function(require,module,exports){
-'use strict';
-
-var raf = requestAnimationFrame || setTimeout;
-var nextFrame = function nextFrame(fn) {
-  raf(function () {
-    raf(fn);
-  });
-};
-
-function setNextFrame(obj, prop, val) {
-  nextFrame(function () {
-    obj[prop] = val;
-  });
-}
-
-function updateStyle(oldVnode, vnode) {
-  var cur,
-      name,
-      elm = vnode.elm,
-      oldStyle = oldVnode.data.style || {},
-      style = vnode.data.style || {},
-      oldHasDel = ('delayed' in oldStyle);
-  for (name in style) {
-    cur = style[name];
-    if (name === 'delayed') {
-      for (name in style.delayed) {
-        cur = style.delayed[name];
-        if (!oldHasDel || cur !== oldStyle.delayed[name]) {
-          setNextFrame(elm.style, name, cur);
-        }
-      }
-    } else if (name !== 'remove' && cur !== oldStyle[name]) {
-      elm.style[name] = cur;
-    }
-  }
-}
-
-function applyDestroyStyle(vnode) {
-  var style,
-      name,
-      elm = vnode.elm,
-      s = vnode.data.style;
-  if (!s || !(style = s.destroy)) return;
-  for (name in style) {
-    elm.style[name] = style[name];
-  }
-}
-
-function applyRemoveStyle(vnode, rm) {
-  var s = vnode.data.style;
-  if (!s || !s.remove) {
-    rm();
-    return;
-  }
-  var name,
-      elm = vnode.elm,
-      idx,
-      i = 0,
-      maxDur = 0,
-      compStyle,
-      style = s.remove,
-      amount = 0;
-  var applied = [];
-  for (name in style) {
-    applied.push(name);
-    elm.style[name] = style[name];
-  }
-  compStyle = getComputedStyle(elm);
-  var props = compStyle['transition-property'].split(', ');
-  for (; i < props.length; ++i) {
-    if (applied.indexOf(props[i]) !== -1) amount++;
-  }
-  elm.addEventListener('transitionend', function (ev) {
-    if (ev.target === elm) --amount;
-    if (amount === 0) rm();
-  });
-}
-
-module.exports = { create: updateStyle, update: updateStyle, destroy: applyDestroyStyle, remove: applyRemoveStyle };
-
-},{}],8:[function(require,module,exports){
-// jshint newcap: false
-'use strict';
-
-var VNode = require('./vnode');
-var is = require('./is');
-
-function isUndef(s) {
-  return s === undefined;
-}
-
-function emptyNodeAt(elm) {
-  return VNode(elm.tagName, {}, [], undefined, elm);
-}
-
-var emptyNode = VNode('', {}, [], undefined, undefined);
-
-var insertedVnodeQueue;
-
-function sameVnode(vnode1, vnode2) {
-  return vnode1.key === vnode2.key && vnode1.sel === vnode2.sel;
-}
-
-function createKeyToOldIdx(children, beginIdx, endIdx) {
-  var i,
-      map = {},
-      key;
-  for (i = beginIdx; i <= endIdx; ++i) {
-    key = children[i].key;
-    if (!isUndef(key)) map[key] = i;
-  }
-  return map;
-}
-
-function createRmCb(parentElm, childElm, listeners) {
-  return function () {
-    if (--listeners === 0) parentElm.removeChild(childElm);
-  };
-}
-
-var hooks = ['create', 'update', 'remove', 'destroy', 'pre', 'post'];
-
-function init(modules) {
-  var i,
-      j,
-      cbs = {};
-  for (i = 0; i < hooks.length; ++i) {
-    cbs[hooks[i]] = [];
-    for (j = 0; j < modules.length; ++j) {
-      if (modules[j][hooks[i]] !== undefined) cbs[hooks[i]].push(modules[j][hooks[i]]);
-    }
-  }
-
-  function createElm(vnode) {
-    var i;
-    if (!isUndef(i = vnode.data) && !isUndef(i = i.hook) && !isUndef(i = i.init)) {
-      i(vnode);
-    }
-    if (!isUndef(i = vnode.data) && !isUndef(i = i.vnode)) vnode = i;
-    var elm,
-        children = vnode.children,
-        sel = vnode.sel;
-    if (!isUndef(sel)) {
-      // Parse selector
-      var hashIdx = sel.indexOf('#');
-      var dotIdx = sel.indexOf('.', hashIdx);
-      var hash = hashIdx > 0 ? hashIdx : sel.length;
-      var dot = dotIdx > 0 ? dotIdx : sel.length;
-      var tag = hashIdx !== -1 || dotIdx !== -1 ? sel.slice(0, Math.min(hash, dot)) : sel;
-      elm = vnode.elm = document.createElement(tag);
-      if (hash < dot) elm.id = sel.slice(hash + 1, dot);
-      if (dotIdx > 0) elm.className = sel.slice(dot + 1).replace(/\./g, ' ');
-      if (is.array(children)) {
-        for (i = 0; i < children.length; ++i) {
-          elm.appendChild(createElm(children[i]));
-        }
-      } else if (is.primitive(vnode.text)) {
-        elm.appendChild(document.createTextNode(vnode.text));
-      }
-      for (i = 0; i < cbs.create.length; ++i) cbs.create[i](emptyNode, vnode);
-      i = vnode.data.hook; // Reuse variable
-      if (!isUndef(i)) {
-        if (i.create) i.create(vnode);
-        if (i.insert) insertedVnodeQueue.push(vnode);
-      }
-    } else {
-      elm = vnode.elm = document.createTextNode(vnode.text);
-    }
-    return elm;
-  }
-
-  function addVnodes(parentElm, before, vnodes, startIdx, endIdx) {
-    if (isUndef(before)) {
-      for (; startIdx <= endIdx; ++startIdx) {
-        parentElm.appendChild(createElm(vnodes[startIdx]));
-      }
-    } else {
-      var elm = before.elm;
-      for (; startIdx <= endIdx; ++startIdx) {
-        parentElm.insertBefore(createElm(vnodes[startIdx]), elm);
-      }
-    }
-  }
-
-  function invokeDestroyHook(vnode) {
-    var i = vnode.data.hook,
-        j;
-    if (!isUndef(i) && !isUndef(j = i.destroy)) j(vnode);
-    for (i = 0; i < cbs.destroy.length; ++i) cbs.destroy[i](vnode);
-    if (!isUndef(vnode.children)) {
-      for (j = 0; j < vnode.children.length; ++j) {
-        invokeDestroyHook(vnode.children[j]);
-      }
-    }
-  }
-
-  function removeVnodes(parentElm, vnodes, startIdx, endIdx) {
-    for (; startIdx <= endIdx; ++startIdx) {
-      var i,
-          listeners,
-          rm,
-          ch = vnodes[startIdx];
-      if (!isUndef(ch)) {
-        listeners = cbs.remove.length + 1;
-        rm = createRmCb(parentElm, ch.elm, listeners);
-        for (i = 0; i < cbs.remove.length; ++i) cbs.remove[i](ch, rm);
-        invokeDestroyHook(ch);
-        if (ch.data.hook && ch.data.hook.remove) {
-          ch.data.hook.remove(ch, rm);
-        } else {
-          rm();
-        }
-      }
-    }
-  }
-
-  function updateChildren(parentElm, oldCh, newCh) {
-    var oldStartIdx = 0,
-        newStartIdx = 0;
-    var oldEndIdx = oldCh.length - 1;
-    var oldStartVnode = oldCh[0];
-    var oldEndVnode = oldCh[oldEndIdx];
-    var newEndIdx = newCh.length - 1;
-    var newStartVnode = newCh[0];
-    var newEndVnode = newCh[newEndIdx];
-    var oldKeyToIdx, idxInOld, elmToMove;
-
-    while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
-      if (isUndef(oldStartVnode)) {
-        oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
-      } else if (isUndef(oldEndVnode)) {
-        oldEndVnode = oldCh[--oldEndIdx];
-      } else if (sameVnode(oldStartVnode, newStartVnode)) {
-        patchVnode(oldStartVnode, newStartVnode);
-        oldStartVnode = oldCh[++oldStartIdx];
-        newStartVnode = newCh[++newStartIdx];
-      } else if (sameVnode(oldEndVnode, newEndVnode)) {
-        patchVnode(oldEndVnode, newEndVnode);
-        oldEndVnode = oldCh[--oldEndIdx];
-        newEndVnode = newCh[--newEndIdx];
-      } else if (sameVnode(oldStartVnode, newEndVnode)) {
-        // Vnode moved right
-        patchVnode(oldStartVnode, newEndVnode);
-        parentElm.insertBefore(oldStartVnode.elm, oldEndVnode.elm.nextSibling);
-        oldStartVnode = oldCh[++oldStartIdx];
-        newEndVnode = newCh[--newEndIdx];
-      } else if (sameVnode(oldEndVnode, newStartVnode)) {
-        // Vnode moved left
-        patchVnode(oldEndVnode, newStartVnode);
-        parentElm.insertBefore(oldEndVnode.elm, oldStartVnode.elm);
-        oldEndVnode = oldCh[--oldEndIdx];
-        newStartVnode = newCh[++newStartIdx];
-      } else {
-        if (isUndef(oldKeyToIdx)) oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx);
-        idxInOld = oldKeyToIdx[newStartVnode.key];
-        if (isUndef(idxInOld)) {
-          // New element
-          parentElm.insertBefore(createElm(newStartVnode), oldStartVnode.elm);
-          newStartVnode = newCh[++newStartIdx];
-        } else {
-          elmToMove = oldCh[idxInOld];
-          patchVnode(elmToMove, newStartVnode);
-          oldCh[idxInOld] = undefined;
-          parentElm.insertBefore(elmToMove.elm, oldStartVnode.elm);
-          newStartVnode = newCh[++newStartIdx];
-        }
-      }
-    }
-    if (oldStartIdx > oldEndIdx) addVnodes(parentElm, oldStartVnode, newCh, newStartIdx, newEndIdx);else if (newStartIdx > newEndIdx) removeVnodes(parentElm, oldCh, oldStartIdx, oldEndIdx);
-  }
-
-  function patchVnode(oldVnode, vnode) {
-    var i;
-    if (!isUndef(i = vnode.data) && !isUndef(i = i.hook) && !isUndef(i = i.patch)) {
-      i = i(oldVnode, vnode);
-    }
-    if (!isUndef(i = oldVnode.data) && !isUndef(i = i.vnode)) oldVnode = i;
-    if (!isUndef(i = vnode.data) && !isUndef(i = i.vnode)) vnode = i;
-    var elm = vnode.elm = oldVnode.elm,
-        oldCh = oldVnode.children,
-        ch = vnode.children;
-    if (oldVnode === vnode) return;
-    if (!isUndef(vnode.data)) {
-      for (i = 0; i < cbs.update.length; ++i) cbs.update[i](oldVnode, vnode);
-      i = vnode.data.hook;
-      if (!isUndef(i) && !isUndef(i = i.update)) i(vnode);
-    }
-    if (isUndef(vnode.text)) {
-      if (!isUndef(oldCh) && !isUndef(ch)) {
-        if (oldCh !== ch) updateChildren(elm, oldCh, ch);
-      } else if (!isUndef(ch)) {
-        addVnodes(elm, undefined, ch, 0, ch.length - 1);
-      } else if (!isUndef(oldCh)) {
-        removeVnodes(elm, oldCh, 0, oldCh.length - 1);
-      }
-    } else if (oldVnode.text !== vnode.text) {
-      elm.childNodes[0].nodeValue = vnode.text;
-    }
-    return vnode;
-  }
-
-  return function (oldVnode, vnode) {
-    var i;
-    insertedVnodeQueue = [];
-    if (oldVnode instanceof Element) {
-      oldVnode = emptyNodeAt(oldVnode);
-    }
-    for (i = 0; i < cbs.pre.length; ++i) cbs.pre[i]();
-    patchVnode(oldVnode, vnode);
-    for (i = 0; i < insertedVnodeQueue.length; ++i) {
-      insertedVnodeQueue[i].data.hook.insert(insertedVnodeQueue[i]);
-    }
-    insertedVnodeQueue = undefined;
-    for (i = 0; i < cbs.post.length; ++i) cbs.post[i]();
-    return vnode;
-  };
-}
-
-module.exports = { init: init };
-
-},{"./is":3,"./vnode":9}],9:[function(require,module,exports){
-"use strict";
-
-module.exports = function (sel, data, children, text, elm) {
-  var key = data === undefined ? undefined : data.key;
-  return { sel: sel, data: data, children: children,
-    text: text, elm: elm, key: key };
-};
-
-},{}]},{},[1]);