[REL] bump to v0.12.0

Closes #100

.gitignore

@@ -14,4 +14,8 @@ yarn-debug.log*
 yarn-error.log*
 
 package-lock.json
-.vscode
+.vscode
+node_modules
+
+# Extras temp file
+/extras/owl.js

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 +1,87 @@
-<h1 align="center">🦉 Odoo Web Lab 🦉</h1>
+<h1 align="center">🦉 <a href="https://odoo.github.io/owl/">Odoo Web Library</a> 🦉</h1>
+
+_A web framework for structured, dynamic and maintainable applications_
 
 ## 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 small
+UI framework intended to be the basis for the [Odoo](https://www.odoo.com/) Web Client, and hopefully many
+other Odoo related projects. OWL's main feature is a _declarative component system_, with QWeb as a template engine, asynchronous rendering, and an underlying virtual dom.
 
-The most important element of this repository is certainly the component system.
-It is designed to be:
+**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.
 
-1. **declarative:** the user interface should be described in term of the state
-   of the application, not as a sequence of imperative steps.
+## OWL's design principles
 
-2. **composable:** each widget can seamlessly be created in a parent widget by
-   a simple directive in its template.
+OWL is designed to be used in highly dynamic applications where changing
+requirements are common, code needs to be maintained by large teams.
 
-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.
+- **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`.
 
-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 is not designed to be fast or small (even though it is quite good on those
+two topics). If you are interested in a comparison with React or Vue, you will
+find some more information [here](doc/comparison.md).
 
-5. **with an imperative escape hatch:** if necessary, sub widgets can easily be
-   manually created/destroyed.
+# Example
 
-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).
+Here is a short example to illustrate interactive widgets:
 
-## Try it online
+```javascript
+class ClickCounter extends owl.Component {
+  state = { value: 0 };
 
-You can experiment with the OWL project online: [https://odoo.github.io/owl/](https://odoo.github.io/owl/)
+  increment() {
+    this.state.value++;
+  }
+}
+
+const TEMPLATES = `
+    <button t-name="ClickCounter" t-on-click="increment">
+        Click Me! [<t t-esc="state.value"/>]
+    </button>`;
+
+const qweb = new owl.QWeb(TEMPLATES);
+const counter = new ClickCounter({ qweb });
+counter.mount(document.body);
+```
+
+More interesting examples can be found on the [playground](https://odoo.github.io/owl/playground) application.
 
 ## Installing/Building
 
+If you want to use a simple `<script>` tag, the last release can be downloaded here:
+
+- [owl-0.12.0.js](https://github.com/odoo/owl/releases/download/v0.12.0/owl.js)
+- [owl-0.12.0.min.js](https://github.com/odoo/owl/releases/download/v0.12.0/owl.min.js)
+
 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                         |
+| 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 minify`       | minify the prebuilt owl.js file                                                 |
+| `npm run test`         | run all tests                                                                   |
+| `npm run test:watch`   | run all tests, and keep a watcher                                               |
+| `npm run extras`       | build extras applications, start a static server (see [here](extras/readme.md)) |
+| `npm run extras:watch` | same as `extras`, but with a watcher to rebuild owl                             |
 
 ## 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:
-
-```javascript
-class HelloWorld extends owl.core.Component {
-  inlineTemplate = `<div>Hello <t t-esc="props.name"/></div>`;
-}
-
-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 = `
-    <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>
-    </div>`;
-
-  constructor(parent, props) {
-    super(parent, props);
-    this.state = {
-      value: props.initialState || 0
-    };
-  }
-
-  increment(delta) {
-    this.updateState({ value: this.state.value + delta });
-  }
-}
-
-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);
-app.mount(document.body);
-```
-
-More interesting examples on how to work with this web framework can be found in the _examples/_ folder:
-
-- [Todo Application](examples/readme.md#todo-app)
-- [Web Client](examples/readme.md#web-client-example)
-- [Benchmarks](examples/readme.md#benchmarks)
-
 ## License
 
 OWL is [GPL licensed](./LICENSE).

doc/animations.md

@@ -0,0 +1,44 @@
+# 🦉 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 click (or activate with the
+keyboard) the button.
+
+## CSS Transitions (single element)
+
+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 (see [QWeb documentation](qweb.md#t-transition-directive)).
+

doc/comparison.md

@@ -0,0 +1,194 @@
+# 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, some
+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.
+
+- [Size](#size)
+- [Tooling/Build Step](#toolingbuild-step)
+- [Templating](#templating)
+- [Asynchronous rendering](#asynchronous-rendering)
+- [Reactiveness](#reactiveness)
+- [State Management](#state-management)
+
+### 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) | Size (minified, gzipped) |
+| ------------------------ | --------------- | ------------------------ |
+| OWL                      | 32kb            | 11kb                     |
+| Vue + VueX               |                 | 30kb                     |
+| React + ReactDOM + Redux |                 | 40kb                     |
+| jQuery                   | 86kb            | 30kb                     |
+
+### 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.
+
+### 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.
+
+```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!
+
+### 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 widget 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 widget may want to fetch an external
+library (a calendar widget may need a specialized calendar rendering library),
+in its willStart hook.
+
+```javascript
+class MyCalendarWidget 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.
+
+### 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 a counter whenever it changes (and a _deep_ counter for each of
+its parents). This assumes that the state is actually a tree.
+
+### 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 mutations and
+actions, like VueX, it keeps track of the state changes, but it does not notify
+a component when the state changes.  Instead, components need to connect to the
+store like in redux, with a function that will listen to the relevant state.

doc/component.md

@@ -1,111 +1,558 @@
-# Component
+# 🦉 OWL Component 🦉
 
-Components are the reusable, composable widgets. They are designed to be low
-level, to be declarative, and with asynchronous rendering.
+## Content
 
-For example:
+- [Overview](#overview)
+- [Example](#example)
+- [Composition](#composition)
+- [Reference](#reference)
+  - [Properties](#properties)
+  - [Static Properties](#static-properties)
+  - [Methods](#methods)
+  - [Lifecycle](#lifecycle)
+  - [Semantics](#semantics)
+  - [Props Validation](#props-validation)
+- [Asynchronous rendering](#asynchronous-rendering)
+
+## Overview
+
+OWL components are the building blocks for user interface. They are designed to be:
+
+1. **declarative:** the user interface should be described in term of the state
+   of the application, not as a sequence of imperative steps.
+
+2. **composable:** each widget can seamlessly be created in a parent widget by
+   a simple directive in its template.
+
+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.
+
+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.md) template (which needs to be preloaded in QWeb).
+Rendering a component generates a virtual dom representation
+of the widget, which is then patched to the DOM, in order to apply the changes in an efficient way.
+
+OWL components observe their states, and rerender themselves whenever it is
+changed. This is done by an [observer](observer.md).
+
+## Example
+
+Let us have a look at a simple component:
 
 ```javascript
-export class Counter extends Component {
-  template = "counter";
-  state = { counter: 0 };
+class ClickCounter extends owl.Component {
+  state = { value: 0 };
 
-  constructor(parent, props) {
-    super(parent, props);
-    this.state.counter = props.initialState || 0;
-  }
-
-  increment(delta) {
-    this.state.counter += delta;
+  increment() {
+    this.state.value++;
   }
 }
 ```
 
 ```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>`;
+<button t-name="ClickCounter" t-on-click="increment">
+  Click Me! [<t t-esc="state.value"/>]
+</button>
 ```
 
-## Lifecycle
+Note that this code is written in ESNext style, so it will only run on the
+latest browsers without a transpilation step.
+
+This example show how a component should be defined: it simply subclasses the
+Component class. If no `template` key is defined, then
+Owl will use the component's name as template name. Here,
+a state object is defined. It is not mandatory to use the state object, but it
+is certainly encouraged. The state object is [observed](observer.md), and any
+change to it will cause a rerendering.
+
+## Composition
+
+The example above shows a QWeb template with a `t-on-click` directive. Widget
+templates are standard [QWeb](qweb.md) templates, but with an extra directive:
+`t-widget`. With the `t-widget` directive, widget templates can declare sub
+widgets:
+
+```xml
+<div t-name="ParentWidget">
+  <span>some text</span>
+  <t t-widget="MyWidget" t-props="{info: 13}"/>
+</div>
+```
+
+```js
+class ParentWidget extends owl.Component {
+    widgets = { MyWidget: MyWidget};
+    ...
+}
+```
+
+In this example, the `ParentWidget`'s template creates a widget `MyWidget` just
+after the span. See the [QWeb](qweb.md) documentation for more information on the
+`t-widget` directive.
+
+Note that the rendering context for the template is the widget itself. This means
+that the template can access `state`, `props`, `env`, or any methods defined in the widget.
+
+**CSS and style:** there is some specific support to allow the parent to declare
+additional css classes or style for the sub widget: css declared in `class`, `style`, `t-att-class` or `t-att-style` will be added to the
+root widget element.
+
+```xml
+<div t-name="ParentWidget">
+  <t t-widget="MyWidget" class="someClass" style="font-weight:bold;" t-props="{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 some custom code, and a
+class that need to be removed. This is why we only support the explicit syntax
+with a class object:
+
+```xml
+<t t-widget="MyWidget" t-att-class="{a: state.flagA, b: state.flagB}" />
+```
+
+## Reference
+
+An Owl component is a small class which represent a widget or some UI element.
+It exists in the context of an environment (`env`), which is propagated from a
+parent to its children. The environment needs to have a QWeb 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 ancestor).
+
+### 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, which contains a QWeb instance.
+
+- **`template`** (string, optional): if given, this is the name of the QWeb template that will render
+  the component.
+
+- **`state`** (Object): this is the location of the component's state, if there is
+  any. After the willStart method, the `state` property is observed, and each
+  change will cause the widget to rerender itself.
+
+- **`props`** (Object): this is an object given (in the constructor) by the parent
+  to configure the component. It can be dynamically changed later by the parent,
+  in some case. Note that `props` are owned by the parent, not by the component.
+  As such, it should not ever be modified by the component!!
+
+- **`refs`** (Object): the `refs` object contains all references to sub DOM nodes
+  or sub widgets defined by a `t-ref` directive in the component's template.
+
+### Static Properties
+
+- **`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) for more information.
+- **`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.
+
+### Methods
+
+- **`mount(target)`** (async): this is the main way a component's hierarchy is added to the
+  DOM: the root component is mounted to a target HTMLElement. 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.
+
+- **`unmount()`**: in case a component need 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 widget 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.
+
+- **`updateEnv(nextEnv)`**: update the environment of a component and all its
+  children. This forces a complete rerender. For example, this could be useful
+  if we have a `isMobile` key in the environment, to decide if we want a mobile
+  interface or a destkop one.
+
+- **`set(target, key, value)`**. This method is necessary in some cases when we
+  need to modify the state of the component in a way that is not visible to the
+  observer (see [observer's technical limitations](observer.md#technical-limitations)).
+  For example, if we need to add a key to the state.
+
+- **`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.
+
+### 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:
+developers write components. Here is a complete description of the lifecycle of
+a owl component:
 
-- **[constructor](#constructor)**
-- **[willStart](#willStart)**
-- **[mounted](#mounted)**
-- **[willPatch](#willPatch)**
-- **[updated](#updated)**
-- **[willUnmount](#willUnmount)**
+| Method                                           | Description                                           |
+| ------------------------------------------------ | ----------------------------------------------------- |
+| **[constructor](#constructor)**                  | 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               |
 
-Note: no hook method should ever be called manually. They are supposed to be
-called by the owl framework whenever it is required.
+Notes:
 
-### constructor
+- 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.
 
-The constructor is not exactly a hook, it is the constructor of the component.
+#### `constructor(parent, props)`
 
-### willStart
+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.
 
-willStart is an asynchronous hook that can be implemented to perform some
-action before the initial rendering of a component.
+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 = {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 = { 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 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
+```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
+The widget rendering will take place after `willStart` is completed.
 
-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
+#### `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
-be unmounted at some point.
+It is the opposite of `willUnmount`. If a component has been mounted, it will
+always be unmounted at some point in the future.
 
-### willUpdateProps
+The mounted method will be called recursively on each of its children. First,
+the parent, then all its children.
+
+Note that the state is now observed. It is however 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 some asynchronous task
 performed, 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
+#### `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
+It is not called on the initial render. This is useful to read some
+information from the DOM. For example, the current position of the
+scrollbar.
 
-### patched
+Note that modifying the state object 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 widget is not in the DOM (this can
+happen with widgets with `t-keepalive`).
 
-This hook is called whenever a component did actually update its props,
-state or env.
+The return value of this method will be given as the first argument of the
+corresponding `patched` call.
+
+#### `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.
+component was patched. Note that this hook will not be called if the widget is
+not in the DOM (this can happen with widgets with `t-keepalive`).
+
+The `snapshot` parameter is the result of the previous `willPatch` call.
 
 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()`
 
 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.
+```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`.
+
+### 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.
+
+   - widget `B` is created
+     1. `willStart` is called on `B`
+     2. template `B` is rendered
+   - widget `C` is created
+     1. `willStart` is called on `C`
+     2. template `C` is rendered
+        - widget `D` is created
+          1. `willStart` is called on `D`
+          2. template `D` is rendered
+        - widget `E` is created
+          1. `willStart` is called on `E`
+          2. template `E` is rendered
+
+3. widget `A` is patched into a detached DOM element. This will create the actual
+   widget `A` DOM structure. The patching process will cause recursively the
+   patching of the `B`, `C`, `D` and `E` DOM trees. (so the actual full DOM tree is created
+   in one pass)
+
+4. the widget `A` root element is actually appended to `document.body`
+
+5. The method `mounted` is called recursively on all widgets in the following
+   order: `B`, `D`, `E`, `C`, `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 widget `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
+
+   - widget `D` is updated:
+     1. hook `willUpdateProps` is called on `D` (async)
+     2. template `D` is rerendered
+   - widget `F` is created:
+     1. hook `willStart` is called on `E` (async)
+     2. template `F` is rendered
+
+3. `willPatch` hooks are called recursively on widgets `C`, `D` (not on `F`,
+   because it is not mounted yet)
+
+4. widget `C` is patched, which will cause recursively:
+
+   2. `willUnmount` hook on `E`, then destruction of `E`,
+   3. (initial) patching of `F`, then hook `mounted` is called on `F`
+
+5. patching of `D`
+
+6. `patched` hooks are called on `D`, `C`
+
+### 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 parent.
+
+A props type system would solve 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 [tooling page](tooling.md#development-mode))
+- if a key does not match the description, an error is thrown
+- it only validates keys defined in (static) `props`. Additional keys in (component) `props` are not validated.
+
+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.
+- 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 constructor, a list of constructors, or an object:
+
+- 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:
+  - `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. It is optional (not set means that we only validate the array, not its elements),
+  - `shape`: if the type was `Object`, then the `shape` key describes the interface of the object. It is optional (not set means that we only validate the object, not its elements)
+
+Examples:
+
+```js
+  // only the existence of those 3 keys is documented
+  static props = ['message', 'id', 'date'];
+```
+
+```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
+  };
+```
+
+## 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 widget can delay the rendering (initial and subsequent) of the whole
+  application
+- for a given widget, 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 widgets:
+
+1. minimize the use of asynchronous widgets!
+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`)

doc/observer.md

@@ -0,0 +1,54 @@
+# 🦉 Observer 🦉
+
+Owl need to be able to react to state changes. For example, whenever the state
+of a component is changed, we need to rerender it. To help with that, we have
+an Observer class. Its job is to observe some object state, and react to any
+change. To do that, it recursively replace all keys of the observed state by
+getters and setters.
+
+For example, this code will display `update` in the console:
+
+```javascript
+const observer = new owl.Observer();
+observer.notifyCB = () => console.log("update");
+observer.observe(obj);
+
+const obj = { a: { b: 1 } };
+obj.a.b = 2;
+```
+
+## Technical Limitations
+
+Since the observer uses getters and setters, it is actually unable to react to
+changes in two situations:
+
+- adding a key to an object:
+
+  ```javascript
+  const observer = new owl.Observer();
+  const obj = { a: 1 };
+  observer.observe(obj);
+  obj.b = 2; // will do nothing
+  ```
+
+  In that case, we need a way to tell the observer that something happened.
+  This can be done by using the `set` method:
+
+  ```javascript
+  observer.set(obj, "b", 2);
+  ```
+
+- modifying an array by setting a new value at a given index:
+
+  ```javascript
+  const observer = new owl.Observer();
+  const obj = { todos: [{ id: 1, text: "todo" }] };
+  observer.observe(obj);
+  obj[0] = { id: 2, text: "othertodo" }; // will do nothing, and obj[0] is not observed
+  ```
+
+  In that case, the solution is the same, we can simply use the `set` method:
+
+  ```javascript
+  observer.set(obj, 0, { id: 2, text: "othertodo" });
+  ```

doc/quick_start.md

@@ -1,11 +1,67 @@
-# Quick Start
+# 🦉 Quick Start 🦉
+
+## Static server
+
+Let us assume that we have a static server running somewhere. We could then
+simply add an html page with a few extra files.
+
+### HTML and CSS
+
+In a file `index.html`:
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <title>My OWL App</title>
+    <link href="app.css" rel="stylesheet" />
+    <script src="owl-X.Y.Z.js"></script>
+  </head>
+  <body>
+    <div id="main"></div>
+    <script src="app.js" type="module"></script>
+  </body>
+</html>
+```
+
+In `app.css`:
+
+```css
+button {
+  color: darkred;
+  font-size: 30px;
+  width: 220px;
+}
+```
+
+Also, let's not forget to add a release of OWL (`owl-X.Y.Z.js`)
+
+### XML
+
+In `templates.xml`:
+
+```xml
+<templates>
+   <button t-name="clickcounter" t-on-click="increment">
+      Click Me! [<t t-esc="state.value"/>]
+    </button>
+</templates>
+```
+
+### JS
 
 To build an application (or a sub-part of an application), we need two things:
 
-- an environment
-- a root widget
+- an environment: it is the global context in which we are working. It needs to
+  contain a QWeb instance (preloaded with templates), and anything else that we
+  need. In practice, it could context some user session information, some
+  configuration keys (for example, isMobile = true/false if we are in mobile mode).
 
-Here are a few steps that may be useful to get started:
+- a description of the user interface: there should be a root widget, which can
+  have sub widgets
+
+Here are a few steps that we may take to get started:
 
 - get the templates
 - create a qweb engine, with the templates
@@ -13,49 +69,33 @@ Here are a few steps that may be useful to get started:
 - 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:
+Let us now add the javascript to make it work, in `app.js`:
 
 ```javascript
-const templates = await loadTemplates();
+class ClickCounter extends owl.Component {
+  constructor() {
+    super(...arguments);
+    this.template = "clickcounter";
+    this.state = { value: 0 };
+  }
 
-const qweb = new QWeb();
-qweb.loadTemplates(templates);
+  increment() {
+    this.state.value++;
+  }
+}
 
-const env = {
-  qweb: qweb
-};
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+async function start() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const env = {
+    qweb: new owl.QWeb(templates)
+  };
+  const counter = new ClickCounter(env);
+  const target = document.getElementById("main");
+  await counter.mount(target);
+}
 
-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);
+start();
 ```

doc/qweb.md

@@ -1,35 +1,679 @@
-# QWeb
+# 🦉 QWeb 🦉
 
-QWeb is a template specification. The QWeb class in this repository is:
+## Content
 
-- an implementation of the QWeb specification
-- which outputs a virtual dom instead of a string
-- and extended with a few extra directives
+- [Overview](#overview)
+- [QWeb Engine](#qweb-engine)
+- [QWeb Specification](#qweb-specification)
+
+  - [Static html nodes](#static-html-nodes)
+  - [`t-esc` directive](#t-esc-directive)
+  - [`t-raw` directive](#t-raw-directive)
+  - [`t-set` directive](#t-set-directive)
+  - [`t-if` directive](#t-if-directive)
+  - [Expression evaluation](#expression-evaluation)
+  - [Dynamic attributes (`t-att` and `t-attf` directives)](#dynamic-attributes-t-att-and-t-attf-directives)
+  - [`t-call` directive (sub templates)](#t-call-directive-sub-templates)
+
+- [JS/OWL Specific Extensions](#jsowl-specific-extensions)
+
+  - [`t-on` directive](#t-on-directive)
+  - [Component: `t-widget`, `t-props`](#component-t-widget-t-props)
+  - [`t-ref` directive](#t-ref-directive)
+  - [`t-key` directive](#t-key-directive)
+  - [`t-transition` directive](#t-transition-directive)
+  - [`t-mounted` directive](#t-mounted-directive)
+  - [Debugging (`t-debug` and `t-log`)](#debugging-t-debug-and-t-log)
+  - [White spaces](#white-spaces)
+  - [Root nodes](#root-nodes)
+
+## Overview
+
+[QWeb](https://www.odoo.com/documentation/12.0/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.
+
+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.
+
+The QWeb implementation in the OWL project is slightly different. It compiles
+templates into functions that output a virtual DOM instead of a string. This is
+necessary for the component system. In addition, it has a few extra directives
+(see [OWL Specific Extensions](#owlspecificextensions))
+
+## QWeb Engine
+
+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();
+```
+
+It's API is quite simple:
+
+- **`constructor(data)`**: constructor. Takes an optional string to add initial
+  templates (see `addTemplates` for more information on format of the string).
+
+  ```js
+  const qweb = new owl.QWeb(TEMPLATES);
+  ```
+
+- **`addTemplate(name, xmlStr)`**: add a specific template.
+
+  ```js
+  qweb.addTemplate("mytemplate", "<div>hello</div>");
+  ```
+
+- **`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="OtherWidget">other widget</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](vdom.md)).
+
+  ```js
+  const vnode = qweb.render("App", widget);
+  ```
+
+- **`register(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-widget` directive). This is useful for commonly used
+  components accross the application.
+
+  ```js
+  class Dialog extends owl.Component { ... }
+  QWeb.register("Dialog", Dialog);
+
+  ...
+
+  class ParentWidget extends owl.Component { ... }
+  qweb.addTemplate("ParentWidget", "<div><t t-widget='Dialog'/></div>");
+  ```
 
 ## QWeb Specification
 
-add here a full description of what QWeb is supposed to be, with some examples
+We define in this section the specification of how `QWeb` templates should be
+rendered.
 
-## QWeb Implementation
+### Static html nodes
 
-```javascript
-var qweb = new QWeb();
-qweb.addTemplate("sometemplate", '<div>hello <t t-esc="name"/></div>');
+Normal, regular html nodes are rendered into themselves:
 
-// result is a vnode which represent <div>hello world</div>
-result = qweb.render("sometemplate", { name: "world" });
+```xml
+  <div>hello</div> <!–– rendered as itself ––>
 ```
 
-## QWeb extensions
+### `t-esc` directive
 
-- t-on directive
-- t-widget, t-props, t-key
-- t-ref
+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.
 
-## Note on white spaces
+```xml
+<p><t t-esc="value"/></p>
+```
+
+rendered with the value `value` set to `42` in the rendering context yields:
+
+```html
+<p>42</p>
+```
+
+### `t-raw` directive
+
+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-esc="value"/></p>
+```
+
+rendered with the value `value` set to `<span>foo</span>` in the rendering context yields:
+
+```html
+<p><span>foo</span></p>
+```
+
+### `t-set` directive
+
+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, ...
+
+### `t-if` directive
+
+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>
+```
+
+### Expression evaluation
+
+It is useful to explain the various rules that applies on QWeb expressions. These
+expressions are strings that will be converted to a javascript expression at
+compile time.
+
+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:
+
+   ```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  | will be replaced by |
+   | ----- | ------------------- |
+   | `and` | `&&`                |
+   | `or`  | `\|\|`              |
+   | `gt`  | `>`                 |
+   | `gte` | `>=`                |
+   | `lt`  | `<`                 |
+   | `lte` | `<=`                |
+
+   So, one can write this:
+
+   ```xml
+   <div><p t-if="10 + 2 gt 5">ok</p></div>
+   ```
+
+### Dynamic attributes (`t-att` and `t-attf` directives)
+
+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> -->
+```
+
+There is another way to format a string attribute: the `t-attf-` directive. With
+it, you get string interpolation:
+
+```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> -->
+```
+
+For historical reason, there is an alternate form of string interpolation:
+
+```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> -->
+```
+
+### `t-call` directive (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>
+```
+
+## JS/OWL Specific Extensions
+
+### `t-on` directive
+
+In a component's template, it is useful to be able to register handlers on some
+elements to some specific events. This
+is what makes a template _alive_. There are two different use cases.
+
+1. Register an event handler on a DOM node
+
+   ```xml
+   <button t-on-click="someMethod">Do something</button>
+   ```
+
+   This will be roughly translated in javascript like this:
+
+   ```js
+   button.addEventListener("click", widget.someMethod.bind(widget));
+   ```
+
+   The suffix (`click` in this example) is simply the name of the actual DOM
+   event.
+
+   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 |
+
+   ```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.
+
+2. Register an event handler on a component. This will not capture a DOM event,
+   but rather a _business_ event:
+
+   ```xml
+   <t t-widget="MyWidget" t-on-menuLoaded="someMethod"/>
+   ```
+
+   ```js
+   class MyWidget {
+       someWhere() {
+           const payload = ...;
+           this.trigger('menuLoaded', payload);
+       }
+   }
+   ```
+
+   Here, the parent widget will receive the payload in its `someMethod` handler,
+   whenever the event is triggered.
+
+The `t-on` directive also allows to prebind some 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.
+
+### Component: `t-widget`, `t-props`
+
+The `t-widget` and the `t-props` directives are the key to a declarative component
+system. They allow a template to define where and how a sub widget is created
+and/or updated. For example:
+
+```xml
+<div t-name="ParentWidget">
+    <t t-widget="ChildWidget" t-props="{count: state.val}"/>
+</div>
+```
+
+```js
+class ParentWidget {
+  widgets = { ChildWidget };
+  state = { val: 4 };
+}
+```
+
+Whenever the template is rendered, it will automatically create the subwidget
+`ChildWidget` at the correct place. It needs to find the reference to the
+actual component class in the special `widgets` key, or the class registered in
+QWeb's global registry (see `register` function of QWeb). It first looks inside
+the local `widgets` key, then fallbacks on the global registry.
+
+In this example, the child widget will receive the object `{count: 4}` in its
+constructor. This will be assigned to the `props` variable, which can be accessed
+on the widget (and also, in the template). Whenever the state is updated, then
+the subwidget will also be updated automatically.
+
+The `t-widget` directive also accepts dynamic values with string interpolation
+(like the [`t-attf-`](#dynamic-attributes-t-att-and-t-attf-directives) directive):
+
+```xml
+<div t-name="ParentWidget">
+    <t t-widget="ChildWidget#{id}"/>
+</div>
+```
+
+```js
+class ParentWidget {
+  widgets = { ChildWidget1, ChildWidget2 };
+  state = { id: 1 };
+}
+```
+
+Similarly to `t-attf-`, there is an alternate form of string interpolation:
+
+```xml
+<div t-name="ParentWidget">
+    <t t-widget="ChildWidget{{id}}"/>
+</div>
+```
+
+### `t-ref` directive
+
+The `t-ref` directive helps a component keep reference to some inside part of it.
+Like the `t-on` directive, it can work either on a DOM node, or on a component:
+
+```xml
+<div>
+    <div t-ref="someDiv"/>
+    <t t-widget="SubWidget" t-ref="someWidget"/>
+</div>
+```
+
+In this example, the widget will be able to access the `div` and the component
+inside the special `refs` variable:
+
+```js
+this.refs.someDiv;
+this.refs.someWidget;
+```
+
+This is useful for various usecases: for example, integrating with an external
+library that needs to render itself inside an actual DOM node. Or for calling
+some method on a sub widget.
+
+Note: if used on a component, the reference will be set in the `refs`
+variable between `willPatch` and `patched`.
+
+The `t-ref` directive also accepts dynamic values with string interpolation
+(like the [`t-attf-`](#dynamic-attributes-t-att-and-t-attf-directives) and
+[`t-widget-`](#component-t-widget-t-props) directives). For example, if we have
+`id` set to 44 in the rendering context,
+
+```xml
+<div t-ref="widget_#{id}"/>
+```
+
+```js
+this.refs.widget_44;
+```
+
+Similarly to `t-attf-` and `t-widget`, there is an alternate form of string
+interpolation:
+
+```xml
+<div t-ref="widget_{{id}}"/>
+```
+
+### `t-key` directive
+
+Even though Owl tries to be as declarative as possible, some DOM state is still
+locked inside the DOM: for example, the scrolling state, the current user selection,
+the focused element or the state of an input. This is why we use a virtual dom
+algorithm to keep the actual DOM node as much as possible. However, this is
+sometimes not enough, and we need to help Owl decide if an element is actually
+the same, or is different. The `t-key` directive is used to give an identity to an element.
+
+There are three main use cases:
+
+- _elements in a list_:
+
+  ```xml
+    <span t-foreach="todos" t-as="todo" t-key="todo.id">
+        <t t-esc="todo.text"/>
+    </span>
+  ```
+
+- _`t-if`/`t-else`_
+
+- _animations_: give a different identity to a component. Ex: thread id with
+  animations on add/remove message.
+
+### `t-transition` directive
+
+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
+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 combined with `t-widget`.
+
+Notes:
+
+- more information on animations are available [here](animations.md).
+- the value for `t-transition` must be a single class name. Owl does not support
+  more than one transition on a single node.
+
+### `t-mounted` directive
+
+The `t-mounted` directive allows to register a callback to execute whenever the node
+is inserted into the DOM.
+
+```xml
+<div><input t-ref="someInput" t-mounted="focusMe"/></div>
+```
+
+```js
+class MyWidget extends owl.Component {
+    ...
+    focusMe() {
+        this.refs.someInput.focus();
+    }
+}
+```
+
+### Debugging (`t-debug` and `t-log`)
+
+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
+
+### 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
+
+### 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="1">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.

doc/readme.md

@@ -1,17 +1,17 @@
-# Odoo Web Lab Documentation
+# 🦉 OWL Documentation 🦉
 
-Currently, this repository contains:
 
-- 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)
+## Reference
 
-- [Quick Start](quick_start.md)
-- [Tutorial](tutorial.md)
 - [Component](component.md)
 - [QWeb](qweb.md)
-- [State Management](state_management.md)
+- [Store](store.md)
+- [Observer](observer.md)
+- [Virtual DOM](vdom.md)
+- [Utils](utils.md)
+
+## Miscellaneous
+- [Quick Start](quick_start.md)
+- [Animations](animations.md)
+- [Tooling](tooling.md)
+- [Comparison with React/Vue](comparison.md)

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/store.md

@@ -0,0 +1,149 @@
+# 🦉 Store 🦉
+
+## Content
+
+- [Overview](#overview)
+- [Example](#example)
+- [Reference](#reference)
+  - [Public API](#public-api)
+  - [Mutations](#mutations)
+  - [Actions](#actions)
+  - [Getters](#getters)
+  - [Connecting a component](#connecting-a-component)
+
+## 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 part 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 state, and let the developer update it in a structured way (through
+mutations and actions). Owl components can then connect to the store, and will
+be updated if necessary.
+
+Note: Owl's store is inspired by React Redux and VueX.
+
+## Example
+
+Here is what a simple store look like:
+
+```js
+const actions = {
+    addTodo({commit}, message) {
+        commit('addTodo', message);
+    }
+};
+
+const mutations = {
+    addTodo({state}, message) {
+        const todo = {
+            id: state.nextId++,
+            message,
+            isCompleted: false,
+        };
+        state.todos.push(todo);
+    },
+};
+
+const state = {
+    todos: [],
+    nextId: 1,
+};
+
+const store = new owl.Store({state, actions, mutations});
+store.on('update', () => console.log(store.state));
+
+// updating the state
+store.dispatch('addTodo', 'fix all bugs');
+```
+
+
+## Reference
+
+The store is a simple `owl.EventBus` 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 a `owl.Observer`),
+which is the reason why it is able to know if it was changed.  This implies that
+state changes need to be done carefully in some cases (adding a new key to an
+object, or modifying an array with the `arr[i] = newValue` syntax).  See the
+[Observer](observer.md)'s documentation for more details.
+
+### Public API
+
+1. `constructor`
+2. `commit`
+3. `dispatch`
+
+### Mutations
+
+Mutations are the only way to modify the state.  Changing the state outside a
+mutation is not allowed (and should throw an error).  Mutations are synchronous.
+
+### Actions
+
+Actions are used to coordinate state changes.  It is also useful whenever some
+asynchronous logic is necessary.  For example, fetching data should be done
+in an action.
+
+```js
+const actions = {
+    async login({commit}) {
+        commit('setLoginState', 'pending');
+        try {
+            const loginInfo = await doSomeRPC('/login/', 'someinfo');
+            commit('setLoginState', loginInfo);
+        } catch {
+            commit('setLoginState', 'error');
+        }
+    }
+};
+```
+
+### 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);
+
+```
+
+### Connecting a component
+
+Todo

doc/tooling.md

@@ -0,0 +1,18 @@
+# 🦉 Tooling 🦉
+
+## Development 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, in some cases, it is
+convenient to have better information on what is going on, this is the purpose
+of the dev mode.
+
+Owl has a mode flag, in `owl.__info__.mode`.  Its default value is `prod`, but
+it can be set to `dev`:
+
+```js
+owl.__info__.mode = 'dev';
+```
+
+Note that templates compiled with the `prod` settings will not be recompiled.
+So, changing this setting is best done at startup.

doc/tutorial.md

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

doc/utils.md

@@ -0,0 +1,39 @@
+# 🦉 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)
+- [`loadJS`](#loadjs)
+- [`loadTemplates`](#loadtemplates)
+- [`escape`](#escape)
+- [`debounce`](#debounce)
+
+## `whenReady`
+
+The function `whenReady` is useful to register some code that need to be executed
+as soon as the document (page) is ready:
+
+```js
+owl.utils.whenReady(function () {
+    const qweb = new owl.QWeb();
+    const app = new App({ qweb });
+    app.mount(document.body);
+});
+```
+
+## `loadJS`
+
+## `loadTemplates`
+
+## `escape`
+
+## `debounce`
+
+
+
+
+
+

doc/vdom.md

@@ -0,0 +1,3 @@
+# 🦉 VDom 🦉
+
+Owl's virtual dom is a fork of [snabbdom](https://github.com/snabbdom/snabbdom).

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>

extras/benchmarks/odoo-widgets-12.0/app.js

@@ -0,0 +1,218 @@
+import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
+
+odoo.define("app", function(require) {
+  const Widget = require("web.Widget");
+  var core = require("web.core");
+  var dom = require("web.dom");
+
+  //----------------------------------------------------------------------------
+  // Likes Counter Widget
+  //----------------------------------------------------------------------------
+  var Counter = Widget.extend({
+    template: "counter",
+    events: {
+      "click .o_increment": "_onIncrement"
+    },
+    init: function(parent) {
+      this._super(parent);
+      this.value = 0;
+    },
+    start: function() {
+      this.updateCounter();
+    },
+    on_attach_callback: function() {},
+    on_detach_callback: function() {},
+    updateCounter: function() {
+      this.$(".o_increment").html("Value: " + this.value);
+    },
+    _onIncrement: function(ev) {
+      ev.stopPropagation();
+      this.value += 1;
+      this.updateCounter();
+    }
+  });
+
+  //----------------------------------------------------------------------------
+  // Message Widget
+  //----------------------------------------------------------------------------
+  var Message = Widget.extend({
+    template: "message",
+    events: {
+      "click .remove": "_onRemove"
+    },
+
+    init: function(parent, message) {
+      this._super(parent);
+      this.author = message.author;
+      this.msg = message.msg;
+      this.id = message.id;
+    },
+    willStart: function() {
+      this.counter = new Counter(this);
+      return this.counter.appendTo($("<div>"));
+    },
+
+    start: function() {
+      this.$msg = this.$(".msg");
+      dom.append(this.$el, this.counter.$el, {
+        in_DOM: this.isInDom,
+        callbacks: [{ widget: this.counter }]
+      });
+    },
+    on_attach_callback: function() {
+      this.isInDom = true;
+      if (this.counter) {
+        this.counter.on_attach_callback();
+      }
+    },
+    on_detach_callback: function() {
+      this.isInDom = true;
+      if (this.counter) {
+        this.counter.on_detach_callback();
+      }
+    },
+
+    _onRemove: function() {
+      this.trigger_up("remove_message", { id: this.id });
+    },
+
+    update: function() {
+      this.msg += "!!!";
+      this.$msg.text(this.msg);
+    }
+  });
+
+  //----------------------------------------------------------------------------
+  // Root Widget
+  //----------------------------------------------------------------------------
+  var App = Widget.extend({
+    template: "root",
+    events: {
+      "click .o_btn_msg.100": function() {
+        this.addMessages(100);
+      },
+      "click .o_btn_msg.1000": function() {
+        this.addMessages(1000);
+      },
+      "click .o_btn_msg.10000": function() {
+        this.addMessages(10000);
+      },
+      "click .o_btn_msg.50000": function() {
+        this.addMessages(50000);
+      },
+      "click .updateSomeMessages": function() {
+        this.updateSomeMessages();
+      },
+      "click .clear": function() {
+        this.clear();
+      }
+    },
+    custom_events: {
+      remove_message: "_onRemoveMessage"
+    },
+
+    init: function(parent) {
+      this._super(parent);
+      this.widgets = {};
+      this.isInDom = false;
+      this.messageCount = 0;
+    },
+
+    start: function() {
+      this.$content = this.$(".content");
+      this.$msgCount = this.$(".message_count");
+    },
+    on_attach_callback: function() {
+      this.isInDom = true;
+      for (let widget of Object.values(this.widgets)) {
+        if (widget.on_attach_callback) {
+          widget.on_attach_callback();
+        }
+      }
+    },
+    on_detach_callback: function() {
+      this.isInDom = true;
+      for (let widget of Object.values(this.widgets)) {
+        if (widget.on_detach_callback) {
+          widget.on_detach_callback();
+        }
+      }
+    },
+
+    updateMessageCount() {
+      this.$msgCount.text("Number of msg: " + this.messageCount);
+    },
+
+    addMessages: function(n) {
+      var self = this;
+      startMeasure("add " + n);
+      const defs = [];
+      const messages = buildData(n);
+      for (let message of messages) {
+        const widget = new Message(this, message);
+        this.widgets[message.id] = widget;
+        defs.push(widget.appendTo("<div>"));
+      }
+      $.when
+        .apply($, defs)
+        .then(function() {
+          for (let message of messages) {
+            let widget = self.widgets[message.id];
+            dom.append(self.$content, widget.$el, {
+              in_DOM: this.isInDom,
+              callbacks: [{ widget: widget }]
+            });
+          }
+        })
+        .then(function() {
+          self.messageCount += n;
+          self.updateMessageCount();
+          stopMeasure();
+        });
+    },
+    clear: function() {
+      startMeasure("clear");
+      this.$content.empty();
+      for (let key in this.widgets) {
+        this.widgets[key].destroy();
+        delete this.widgets[key];
+      }
+      this.messageCount = 0;
+      this.updateMessageCount();
+      stopMeasure();
+    },
+    updateSomeMessages: function() {
+      startMeasure("update every 10th");
+      const widgets = Object.values(this.widgets);
+      for (let i = 0; i < widgets.length; i += 10) {
+        widgets[i].update();
+      }
+      stopMeasure();
+    },
+    _onRemoveMessage: function(ev) {
+      startMeasure("remove message");
+      ev.target.destroy();
+      delete this.widgets[ev.data.id];
+      this.messageCount--;
+      this.updateMessageCount();
+      stopMeasure();
+    }
+  });
+
+  //------------------------------------------------------------------------------
+  // Application initialization
+  //------------------------------------------------------------------------------
+  async function start() {
+    // prepare QWeb
+    const templates = await fetch("templates.xml");
+    let strTemplates = await templates.text();
+    strTemplates = strTemplates.replace(/<!--[\s\S]*?-->/g, "");
+    core.qweb.add_template(strTemplates);
+
+    // prepare app
+    const app = new App();
+    await app.appendTo(document.body);
+  }
+
+  start();
+});

extras/benchmarks/odoo-widgets-12.0/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>Odoo Widget Benchmark (12.0)</title>
+  <link href="../shared/main.css" rel="stylesheet"/>
+  <script src='web.assets_common.js'></script>
+</head>
+<body>
+  <div id='main'></div>
+  <script src='app.js' type="module"></script>
+</body>
+</html>

extras/benchmarks/odoo-widgets-12.0/templates.xml

@@ -0,0 +1,30 @@
+<templates>
+    <div class="main" t-name="root">
+        <div class="left-thing">
+            <div class="message_count">
+                Number of msg: 0
+            </div>
+            <button class="o_btn_msg 100">Add 100 messages</button>
+            <button class="o_btn_msg 1000">Add 1000 messages</button>
+            <button class="o_btn_msg 10000">Add 10000 messages</button>
+            <button class="o_btn_msg 50000">Add 50000 messages</button>
+            <button class="updateSomeMessages">Update every 10th message</button>
+            <button class="clear">Clear</button>
+        </div>
+        <div class="right-thing">
+            <div class="content">
+            </div>
+        </div>
+    </div>
+
+    <div t-name="message" class="message">
+        <span class="author"><t t-esc="widget.author"/></span>
+        <span class="msg"><t t-esc="widget.msg"/></span>
+        <button class="remove" >Remove</button>
+    </div>
+
+  <div t-name="counter">
+    <button class="o_increment"></button>
+  </div>
+
+</templates>

extras/benchmarks/odoo-widgets-12.3/app.js

@@ -0,0 +1,218 @@
+import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
+
+odoo.define("app", function(require) {
+  const Widget = require("web.Widget");
+  var core = require("web.core");
+  var dom = require("web.dom");
+
+  //----------------------------------------------------------------------------
+  // Likes Counter Widget
+  //----------------------------------------------------------------------------
+  var Counter = Widget.extend({
+    template: "counter",
+    events: {
+      "click .o_increment": "_onIncrement"
+    },
+    init: function(parent) {
+      this._super(parent);
+      this.value = 0;
+    },
+    start: function() {
+      this.updateCounter();
+    },
+    on_attach_callback: function() {},
+    on_detach_callback: function() {},
+    updateCounter: function() {
+      this.$(".o_increment").html("Value: " + this.value);
+    },
+    _onIncrement: function(ev) {
+      ev.stopPropagation();
+      this.value += 1;
+      this.updateCounter();
+    }
+  });
+
+  //----------------------------------------------------------------------------
+  // Message Widget
+  //----------------------------------------------------------------------------
+  var Message = Widget.extend({
+    template: "message",
+    events: {
+      "click .remove": "_onRemove"
+    },
+
+    init: function(parent, message) {
+      this._super(parent);
+      this.author = message.author;
+      this.msg = message.msg;
+      this.id = message.id;
+    },
+    willStart: function() {
+      this.counter = new Counter(this);
+      return this.counter.appendTo($("<div>"));
+    },
+
+    start: function() {
+      this.$msg = this.$(".msg");
+      dom.append(this.$el, this.counter.$el, {
+        in_DOM: this.isInDom,
+        callbacks: [{ widget: this.counter }]
+      });
+    },
+    on_attach_callback: function() {
+      this.isInDom = true;
+      if (this.counter) {
+        this.counter.on_attach_callback();
+      }
+    },
+    on_detach_callback: function() {
+      this.isInDom = true;
+      if (this.counter) {
+        this.counter.on_detach_callback();
+      }
+    },
+
+    _onRemove: function() {
+      this.trigger_up("remove_message", { id: this.id });
+    },
+
+    update: function() {
+      this.msg += "!!!";
+      this.$msg.text(this.msg);
+    }
+  });
+
+  //----------------------------------------------------------------------------
+  // Root Widget
+  //----------------------------------------------------------------------------
+  var App = Widget.extend({
+    template: "root",
+    events: {
+      "click .o_btn_msg.100": function() {
+        this.addMessages(100);
+      },
+      "click .o_btn_msg.1000": function() {
+        this.addMessages(1000);
+      },
+      "click .o_btn_msg.10000": function() {
+        this.addMessages(10000);
+      },
+      "click .o_btn_msg.50000": function() {
+        this.addMessages(50000);
+      },
+      "click .updateSomeMessages": function() {
+        this.updateSomeMessages();
+      },
+      "click .clear": function() {
+        this.clear();
+      }
+    },
+    custom_events: {
+      remove_message: "_onRemoveMessage"
+    },
+
+    init: function(parent) {
+      this._super(parent);
+      this.widgets = {};
+      this.isInDom = false;
+      this.messageCount = 0;
+    },
+
+    start: function() {
+      this.$content = this.$(".content");
+      this.$msgCount = this.$(".message_count");
+    },
+    on_attach_callback: function() {
+      this.isInDom = true;
+      for (let widget of Object.values(this.widgets)) {
+        if (widget.on_attach_callback) {
+          widget.on_attach_callback();
+        }
+      }
+    },
+    on_detach_callback: function() {
+      this.isInDom = true;
+      for (let widget of Object.values(this.widgets)) {
+        if (widget.on_detach_callback) {
+          widget.on_detach_callback();
+        }
+      }
+    },
+
+    updateMessageCount() {
+      this.$msgCount.text("Number of msg: " + this.messageCount);
+    },
+
+    addMessages: function(n) {
+      var self = this;
+      startMeasure("add " + n);
+      const defs = [];
+      const messages = buildData(n);
+      for (let message of messages) {
+        const widget = new Message(this, message);
+        this.widgets[message.id] = widget;
+        defs.push(widget.appendTo("<div>"));
+      }
+      $.when
+        .apply($, defs)
+        .then(function() {
+          for (let message of messages) {
+            let widget = self.widgets[message.id];
+            dom.append(self.$content, widget.$el, {
+              in_DOM: this.isInDom,
+              callbacks: [{ widget: widget }]
+            });
+          }
+        })
+        .then(function() {
+          self.messageCount += n;
+          self.updateMessageCount();
+          stopMeasure();
+        });
+    },
+    clear: function() {
+      startMeasure("clear");
+      this.$content.empty();
+      for (let key in this.widgets) {
+        this.widgets[key].destroy();
+        delete this.widgets[key];
+      }
+      this.messageCount = 0;
+      this.updateMessageCount();
+      stopMeasure();
+    },
+    updateSomeMessages: function() {
+      startMeasure("update every 10th");
+      const widgets = Object.values(this.widgets);
+      for (let i = 0; i < widgets.length; i += 10) {
+        widgets[i].update();
+      }
+      stopMeasure();
+    },
+    _onRemoveMessage: function(ev) {
+      startMeasure("remove message");
+      ev.target.destroy();
+      delete this.widgets[ev.data.id];
+      this.messageCount--;
+      this.updateMessageCount();
+      stopMeasure();
+    }
+  });
+
+  //------------------------------------------------------------------------------
+  // Application initialization
+  //------------------------------------------------------------------------------
+  async function start() {
+    // prepare QWeb
+    const templates = await fetch("templates.xml");
+    let strTemplates = await templates.text();
+    strTemplates = strTemplates.replace(/<!--[\s\S]*?-->/g, "");
+    core.qweb.add_template(strTemplates);
+
+    // prepare app
+    const app = new App();
+    await app.appendTo(document.body);
+  }
+
+  start();
+});

extras/benchmarks/odoo-widgets-12.3/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>Odoo Widget Benchmark (12.3)</title>
+  <link href="../shared/main.css" rel="stylesheet"/>
+  <script src='web.assets_common.js'></script>
+</head>
+<body>
+  <div id='main'></div>
+  <script src='app.js' type="module"></script>
+</body>
+</html>

extras/benchmarks/odoo-widgets-12.3/templates.xml

@@ -0,0 +1,30 @@
+<templates>
+    <div class="main" t-name="root">
+        <div class="left-thing">
+            <div class="message_count">
+                Number of msg: 0
+            </div>
+            <button class="o_btn_msg 100">Add 100 messages</button>
+            <button class="o_btn_msg 1000">Add 1000 messages</button>
+            <button class="o_btn_msg 10000">Add 10000 messages</button>
+            <button class="o_btn_msg 50000">Add 50000 messages</button>
+            <button class="updateSomeMessages">Update every 10th message</button>
+            <button class="clear">Clear</button>
+        </div>
+        <div class="right-thing">
+            <div class="content">
+            </div>
+        </div>
+    </div>
+
+    <div t-name="message" class="message">
+        <span class="author"><t t-esc="widget.author"/></span>
+        <span class="msg"><t t-esc="widget.msg"/></span>
+        <button class="remove" >Remove</button>
+    </div>
+
+  <div t-name="counter">
+    <button class="o_increment"></button>
+  </div>
+
+</templates>

extras/benchmarks/owl-0.10.0/app.js

@@ -0,0 +1,84 @@
+import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Likes Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends owl.Component {
+  template = "counter";
+  state = { counter: 0 };
+
+  increment() {
+    this.state.counter++;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends owl.Component {
+  template = "message";
+  widgets = { Counter };
+
+  shouldUpdate(nextProps) {
+    return nextProps !== this.props;
+  }
+  removeMessage() {
+    this.trigger("remove_message", {
+      id: this.props.id
+    });
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class App extends owl.Component {
+  template = "root";
+  widgets = { Message };
+  state = { messages: [] };
+
+  addMessages(n) {
+    startMeasure("add " + n);
+    const newMessages = buildData(n);
+    this.state.messages.push.apply(this.state.messages, newMessages);
+    stopMeasure();
+  }
+
+  clear() {
+    startMeasure("clear");
+    this.state.messages = [];
+    stopMeasure();
+  }
+
+  updateSomeMessages() {
+    startMeasure("update every 10th");
+    const messages = this.state.messages;
+    for (let i = 0; i < this.state.messages.length; i += 10) {
+      const msg = Object.assign({}, messages[i]);
+      msg.author += '!!!';
+      this.set(messages, i, msg);
+    }
+    stopMeasure();
+  }
+
+  removeMessage(data) {
+    startMeasure("remove message");
+    const index = this.state.messages.findIndex(m => m.id === data.id);
+    this.state.messages.splice(index, 1);
+    stopMeasure();
+  }
+}
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+async function start() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const env = {
+    qweb: new owl.QWeb(templates)
+  };
+  const app = new App(env);
+  app.mount(document.body);
+}
+
+start();

extras/benchmarks/owl-0.10.0/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>OWL 0.10.0 Benchmark</title>
+  <link href="../shared/main.css" rel="stylesheet"/>
+  <script src='owl.js'></script>
+</head>
+<body>
+  <div id='main'></div>
+  <script src='app.js' type="module"></script>
+</body>
+</html>

extras/benchmarks/owl-0.10.0/templates.xml

@@ -0,0 +1,32 @@
+<templates>
+  <div t-name="root" class="main">
+      <div class="left-thing">
+          <div>Number of msg: <t t-esc="state.messages.length"/></div>
+          <button t-on-click="addMessages(100)">Add 100 messages</button>
+          <button t-on-click="addMessages(1000)">Add 1000 messages</button>
+          <button t-on-click="addMessages(10000)">Add 10000 messages</button>
+          <button t-on-click="addMessages(50000)">Add 50000 messages</button>
+          <button t-on-click="updateSomeMessages">Update every 10th message</button>
+          <button t-on-click="clear">Clear</button>
+      </div>
+      <div class="right-thing">
+          <div class="content">
+              <t t-foreach="state.messages" t-as="message">
+                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
+              </t>
+          </div>
+      </div>
+  </div>
+
+  <div t-name="message" 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"/>
+  </div>
+
+  <div t-name="counter">
+    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
+  </div>
+
+</templates>

extras/benchmarks/owl-0.11.0/app.js

@@ -0,0 +1,84 @@
+import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Likes Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends owl.Component {
+  template = "counter";
+  state = { counter: 0 };
+
+  increment() {
+    this.state.counter++;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends owl.Component {
+  template = "message";
+  widgets = { Counter };
+
+  shouldUpdate(nextProps) {
+    return nextProps !== this.props;
+  }
+  removeMessage() {
+    this.trigger("remove_message", {
+      id: this.props.id
+    });
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class App extends owl.Component {
+  template = "root";
+  widgets = { Message };
+  state = { messages: [] };
+
+  addMessages(n) {
+    startMeasure("add " + n);
+    const newMessages = buildData(n);
+    this.state.messages.push.apply(this.state.messages, newMessages);
+    stopMeasure();
+  }
+
+  clear() {
+    startMeasure("clear");
+    this.state.messages = [];
+    stopMeasure();
+  }
+
+  updateSomeMessages() {
+    startMeasure("update every 10th");
+    const messages = this.state.messages;
+    for (let i = 0; i < this.state.messages.length; i += 10) {
+      const msg = Object.assign({}, messages[i]);
+      msg.author += '!!!';
+      this.set(messages, i, msg);
+    }
+    stopMeasure();
+  }
+
+  removeMessage(data) {
+    startMeasure("remove message");
+    const index = this.state.messages.findIndex(m => m.id === data.id);
+    this.state.messages.splice(index, 1);
+    stopMeasure();
+  }
+}
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+async function start() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const env = {
+    qweb: new owl.QWeb(templates)
+  };
+  const app = new App(env);
+  app.mount(document.body);
+}
+
+start();

extras/benchmarks/owl-0.11.0/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>OWL 0.11.0 Benchmark</title>
+  <link href="../shared/main.css" rel="stylesheet"/>
+  <script src='owl.js'></script>
+</head>
+<body>
+  <div id='main'></div>
+  <script src='app.js' type="module"></script>
+</body>
+</html>

extras/benchmarks/owl-0.11.0/templates.xml

@@ -0,0 +1,32 @@
+<templates>
+  <div t-name="root" class="main">
+      <div class="left-thing">
+          <div>Number of msg: <t t-esc="state.messages.length"/></div>
+          <button t-on-click="addMessages(100)">Add 100 messages</button>
+          <button t-on-click="addMessages(1000)">Add 1000 messages</button>
+          <button t-on-click="addMessages(10000)">Add 10000 messages</button>
+          <button t-on-click="addMessages(50000)">Add 50000 messages</button>
+          <button t-on-click="updateSomeMessages">Update every 10th message</button>
+          <button t-on-click="clear">Clear</button>
+      </div>
+      <div class="right-thing">
+          <div class="content">
+              <t t-foreach="state.messages" t-as="message">
+                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
+              </t>
+          </div>
+      </div>
+  </div>
+
+  <div t-name="message" 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"/>
+  </div>
+
+  <div t-name="counter">
+    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
+  </div>
+
+</templates>

extras/benchmarks/owl-0.7.0/app.js

@@ -0,0 +1,85 @@
+import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Likes Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends owl.Component {
+  template = "counter";
+  state = { counter: 0 };
+
+  increment() {
+    this.state.counter++;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends owl.Component {
+  template = "message";
+  widgets = { Counter };
+
+  shouldUpdate(nextProps) {
+    return nextProps !== this.props;
+  }
+
+  removeMessage() {
+    this.trigger("remove_message", {
+      id: this.props.id
+    });
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class App extends owl.Component {
+  template = "root";
+  widgets = { Message };
+  state = { messages: [] };
+
+  addMessages(n) {
+    startMeasure("add " + n);
+    const newMessages = buildData(n);
+    this.state.messages.push.apply(this.state.messages, newMessages);
+    stopMeasure();
+  }
+
+  clear() {
+    startMeasure("clear");
+    this.state.messages = [];
+    stopMeasure();
+  }
+
+  updateSomeMessages() {
+    startMeasure("update every 10th");
+    const messages = this.state.messages;
+    for (let i = 0; i < this.state.messages.length; i += 10) {
+      const msg = Object.assign({}, messages[i]);
+      msg.author += '!!!';
+      this.set(messages, i, msg);
+    }
+    stopMeasure();
+  }
+
+  removeMessage(data) {
+    startMeasure('remove message');
+    const index = this.state.messages.findIndex(m => m.id === data.id);
+    this.state.messages.splice(index, 1);
+    stopMeasure();
+  }
+}
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+async function start() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const env = {
+    qweb: new owl.QWeb(templates)
+  };
+  const app = new App(env);
+  app.mount(document.body);
+}
+
+start();

extras/benchmarks/owl-0.7.0/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>OWL 0.7.0 Benchmark</title>
+  <link href="../shared/main.css" rel="stylesheet"/>
+  <script src='owl.js'></script>
+</head>
+<body>
+  <div id='main'></div>
+  <script src='app.js' type="module"></script>
+</body>
+</html>

extras/benchmarks/owl-0.7.0/templates.xml

@@ -0,0 +1,32 @@
+<templates>
+  <div t-name="root" class="main">
+      <div class="left-thing">
+          <div>Number of msg: <t t-esc="state.messages.length"/></div>
+          <button t-on-click="addMessages(100)">Add 100 messages</button>
+          <button t-on-click="addMessages(1000)">Add 1000 messages</button>
+          <button t-on-click="addMessages(10000)">Add 10000 messages</button>
+          <button t-on-click="addMessages(50000)">Add 50000 messages</button>
+          <button t-on-click="updateSomeMessages">Update every 10th message</button>
+          <button t-on-click="clear">Clear</button>
+      </div>
+      <div class="right-thing">
+          <div class="content">
+              <t t-foreach="state.messages" t-as="message">
+                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
+              </t>
+          </div>
+      </div>
+  </div>
+
+  <div t-name="message" 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"/>
+  </div>
+
+  <div t-name="counter">
+    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
+  </div>
+
+</templates>

extras/benchmarks/owl-0.8.0/app.js

@@ -0,0 +1,84 @@
+import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Likes Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends owl.Component {
+  template = "counter";
+  state = { counter: 0 };
+
+  increment() {
+    this.state.counter++;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends owl.Component {
+  template = "message";
+  widgets = { Counter };
+
+  shouldUpdate(nextProps) {
+    return nextProps !== this.props;
+  }
+  removeMessage() {
+    this.trigger("remove_message", {
+      id: this.props.id
+    });
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class App extends owl.Component {
+  template = "root";
+  widgets = { Message };
+  state = { messages: [] };
+
+  addMessages(n) {
+    startMeasure("add " + n);
+    const newMessages = buildData(n);
+    this.state.messages.push.apply(this.state.messages, newMessages);
+    stopMeasure();
+  }
+
+  clear() {
+    startMeasure("clear");
+    this.state.messages = [];
+    stopMeasure();
+  }
+
+  updateSomeMessages() {
+    startMeasure("update every 10th");
+    const messages = this.state.messages;
+    for (let i = 0; i < this.state.messages.length; i += 10) {
+      const msg = Object.assign({}, messages[i]);
+      msg.author += '!!!';
+      this.set(messages, i, msg);
+    }
+    stopMeasure();
+  }
+
+  removeMessage(data) {
+    startMeasure("remove message");
+    const index = this.state.messages.findIndex(m => m.id === data.id);
+    this.state.messages.splice(index, 1);
+    stopMeasure();
+  }
+}
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+async function start() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const env = {
+    qweb: new owl.QWeb(templates)
+  };
+  const app = new App(env);
+  app.mount(document.body);
+}
+
+start();

extras/benchmarks/owl-0.8.0/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>OWL 0.8.0 Benchmark</title>
+  <link href="../shared/main.css" rel="stylesheet"/>
+  <script src='owl-0.8.0.js'></script>
+</head>
+<body>
+  <div id='main'></div>
+  <script src='app.js' type="module"></script>
+</body>
+</html>

extras/benchmarks/owl-0.8.0/templates.xml

@@ -0,0 +1,32 @@
+<templates>
+  <div t-name="root" class="main">
+      <div class="left-thing">
+          <div>Number of msg: <t t-esc="state.messages.length"/></div>
+          <button t-on-click="addMessages(100)">Add 100 messages</button>
+          <button t-on-click="addMessages(1000)">Add 1000 messages</button>
+          <button t-on-click="addMessages(10000)">Add 10000 messages</button>
+          <button t-on-click="addMessages(50000)">Add 50000 messages</button>
+          <button t-on-click="updateSomeMessages">Update every 10th message</button>
+          <button t-on-click="clear">Clear</button>
+      </div>
+      <div class="right-thing">
+          <div class="content">
+              <t t-foreach="state.messages" t-as="message">
+                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
+              </t>
+          </div>
+      </div>
+  </div>
+
+  <div t-name="message" 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"/>
+  </div>
+
+  <div t-name="counter">
+    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
+  </div>
+
+</templates>

extras/benchmarks/owl-0.9.0/app.js

@@ -0,0 +1,84 @@
+import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Likes Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends owl.Component {
+  template = "counter";
+  state = { counter: 0 };
+
+  increment() {
+    this.state.counter++;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends owl.Component {
+  template = "message";
+  widgets = { Counter };
+
+  shouldUpdate(nextProps) {
+    return nextProps !== this.props;
+  }
+  removeMessage() {
+    this.trigger("remove_message", {
+      id: this.props.id
+    });
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class App extends owl.Component {
+  template = "root";
+  widgets = { Message };
+  state = { messages: [] };
+
+  addMessages(n) {
+    startMeasure("add " + n);
+    const newMessages = buildData(n);
+    this.state.messages.push.apply(this.state.messages, newMessages);
+    stopMeasure();
+  }
+
+  clear() {
+    startMeasure("clear");
+    this.state.messages = [];
+    stopMeasure();
+  }
+
+  updateSomeMessages() {
+    startMeasure("update every 10th");
+    const messages = this.state.messages;
+    for (let i = 0; i < this.state.messages.length; i += 10) {
+      const msg = Object.assign({}, messages[i]);
+      msg.author += '!!!';
+      this.set(messages, i, msg);
+    }
+    stopMeasure();
+  }
+
+  removeMessage(data) {
+    startMeasure("remove message");
+    const index = this.state.messages.findIndex(m => m.id === data.id);
+    this.state.messages.splice(index, 1);
+    stopMeasure();
+  }
+}
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+async function start() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const env = {
+    qweb: new owl.QWeb(templates)
+  };
+  const app = new App(env);
+  app.mount(document.body);
+}
+
+start();

extras/benchmarks/owl-0.9.0/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>OWL 0.9.0 Benchmark</title>
+  <link href="../shared/main.css" rel="stylesheet"/>
+  <script src='owl.js'></script>
+</head>
+<body>
+  <div id='main'></div>
+  <script src='app.js' type="module"></script>
+</body>
+</html>

extras/benchmarks/owl-0.9.0/templates.xml

@@ -0,0 +1,32 @@
+<templates>
+  <div t-name="root" class="main">
+      <div class="left-thing">
+          <div>Number of msg: <t t-esc="state.messages.length"/></div>
+          <button t-on-click="addMessages(100)">Add 100 messages</button>
+          <button t-on-click="addMessages(1000)">Add 1000 messages</button>
+          <button t-on-click="addMessages(10000)">Add 10000 messages</button>
+          <button t-on-click="addMessages(50000)">Add 50000 messages</button>
+          <button t-on-click="updateSomeMessages">Update every 10th message</button>
+          <button t-on-click="clear">Clear</button>
+      </div>
+      <div class="right-thing">
+          <div class="content">
+              <t t-foreach="state.messages" t-as="message">
+                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
+              </t>
+          </div>
+      </div>
+  </div>
+
+  <div t-name="message" 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"/>
+  </div>
+
+  <div t-name="counter">
+    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
+  </div>
+
+</templates>

extras/benchmarks/owl-master/app.js

@@ -0,0 +1,81 @@
+import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Likes Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends owl.Component {
+  state = { counter: 0 };
+
+  increment() {
+    this.state.counter++;
+  }
+}
+
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends owl.Component {
+  widgets = { Counter };
+
+  shouldUpdate(nextProps) {
+    return nextProps !== this.props;
+  }
+  removeMessage() {
+    this.trigger("remove_message", {
+      id: this.props.id
+    });
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class App extends owl.Component {
+  widgets = { Message };
+  state = { messages: [] };
+
+  addMessages(n) {
+    startMeasure("add " + n);
+    const newMessages = buildData(n);
+    this.state.messages.push.apply(this.state.messages, newMessages);
+    stopMeasure();
+  }
+
+  clear() {
+    startMeasure("clear");
+    this.state.messages = [];
+    stopMeasure();
+  }
+
+  updateSomeMessages() {
+    startMeasure("update every 10th");
+    const messages = this.state.messages;
+    for (let i = 0; i < this.state.messages.length; i += 10) {
+      const msg = Object.assign({}, messages[i]);
+      msg.author += '!!!';
+      this.set(messages, i, msg);
+    }
+    stopMeasure();
+  }
+
+  removeMessage(data) {
+    startMeasure("remove message");
+    const index = this.state.messages.findIndex(m => m.id === data.id);
+    this.state.messages.splice(index, 1);
+    stopMeasure();
+  }
+}
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+async function start() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const env = {
+    qweb: new owl.QWeb(templates)
+  };
+  const app = new App(env);
+  app.mount(document.body);
+}
+
+start();

extras/benchmarks/owl-master/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>OWL Master Benchmark</title>
+  <link href="../shared/main.css" rel="stylesheet"/>
+  <script src='../../owl.js'></script>
+</head>
+<body>
+  <div id='main'></div>
+  <script src='app.js' type="module"></script>
+</body>
+</html>

extras/benchmarks/owl-master/templates.xml

@@ -0,0 +1,32 @@
+<templates>
+  <div t-name="App" class="main">
+      <div class="left-thing">
+          <div>Number of msg: <t t-esc="state.messages.length"/></div>
+          <button t-on-click="addMessages(100)">Add 100 messages</button>
+          <button t-on-click="addMessages(1000)">Add 1000 messages</button>
+          <button t-on-click="addMessages(10000)">Add 10000 messages</button>
+          <button t-on-click="addMessages(50000)">Add 50000 messages</button>
+          <button t-on-click="updateSomeMessages">Update every 10th message</button>
+          <button t-on-click="clear">Clear</button>
+      </div>
+      <div class="right-thing">
+          <div class="content">
+              <t t-foreach="state.messages" t-as="message">
+                  <t t-widget="Message" t-key="message.id" t-props="message" t-on-remove_message="removeMessage"/>
+              </t>
+          </div>
+      </div>
+  </div>
+
+  <div t-name="Message" 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"/>
+  </div>
+
+  <div t-name="Counter">
+    <button t-on-click="increment">Value: <t t-esc="state.counter"/></button>
+  </div>
+
+</templates>

extras/benchmarks/react/app.js

@@ -0,0 +1,221 @@
+import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Counter Widget
+//------------------------------------------------------------------------------
+class Counter extends React.Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      counter: 0
+    };
+    this.increment = this.increment.bind(this);
+  }
+
+  render() {
+    return React.createElement(
+      "div",
+      null,
+      React.createElement(
+        "button",
+        {
+          onClick: this.increment
+        },
+        "Value: ",
+        this.state.counter
+      )
+    );
+  }
+
+  increment() {
+    this.setState({
+      counter: this.state.counter + 1
+    });
+  }
+}
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+class Message extends React.Component {
+  constructor(props) {
+    super(props);
+    this.removeMessage = this.removeMessage.bind(this);
+  }
+
+  render() {
+    return React.createElement(
+      "div",
+      {
+        className: "message"
+      },
+      React.createElement(
+        "span",
+        {
+          className: "author"
+        },
+        this.props.message.author
+      ),
+      React.createElement(
+        "span",
+        {
+          className: "msg"
+        },
+        this.props.message.msg
+      ),
+      React.createElement(
+        "button",
+        {
+          className: "remove",
+          onClick: this.removeMessage
+        },
+        "Remove"
+      ),
+      React.createElement(Counter, null)
+    );
+  }
+
+  removeMessage() {
+    this.props.removeCB(this.props.message.id);
+  }
+}
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+class Main extends React.Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      messages: []
+    };
+    this.removeMessage = this.removeMessage.bind(this);
+  }
+
+  render() {
+    const msgList = this.state.messages.map(m =>
+      React.createElement(Message, {
+        key: m.id,
+        message: m,
+        removeCB: this.removeMessage
+      })
+    );
+    return React.createElement(
+      "div",
+      {
+        className: "main"
+      },
+      React.createElement(
+        "div",
+        {
+          className: "left-thing"
+        },
+        React.createElement(
+          "div",
+          null,
+          "Number of msg: ",
+          this.state.messages.length
+        ),
+        React.createElement(
+          "button",
+          {
+            onClick: _ => this.addMessages(100)
+          },
+          "Add 100 messages"
+        ),
+        React.createElement(
+          "button",
+          {
+            onClick: _ => this.addMessages(1000)
+          },
+          "Add 1000 messages"
+        ),
+        React.createElement(
+          "button",
+          {
+            onClick: _ => this.addMessages(10000)
+          },
+          "Add 10000 messages"
+        ),
+        React.createElement(
+          "button",
+          {
+            onClick: _ => this.addMessages(50000)
+          },
+          "Add 50000 messages"
+        ),
+        React.createElement(
+          "button",
+          {
+            onClick: _ => this.updateSomeMessages()
+          },
+          "Update every 10th messags"
+        ),
+        React.createElement(
+          "button",
+          {
+            onClick: _ => this.clear()
+          },
+          "Clear"
+        )
+      ),
+      React.createElement(
+        "div",
+        {
+          className: "right-thing"
+        },
+        React.createElement(
+          "div",
+          {
+            className: "content"
+          },
+          msgList
+        )
+      )
+    );
+  }
+
+  addMessages(n) {
+    startMeasure("add " + n);
+    const newMessages = this.state.messages.concat(buildData(n));
+    this.setState({
+      messages: newMessages
+    });
+    stopMeasure();
+  }
+
+  clear() {
+    startMeasure("clear");
+    this.setState({
+      messages: []
+    });
+    stopMeasure();
+  }
+
+  updateSomeMessages() {
+    startMeasure("update every 10th");
+    const messages = this.state.messages;
+    for (let i = 0; i < messages.length; i += 10) {
+      messages[i].author += "!!!";
+    }
+    this.forceUpdate();
+    stopMeasure();
+  }
+
+  removeMessage(id) {
+    startMeasure("remove message");
+    const index = this.state.messages.findIndex(m => m.id === id);
+    const messages = this.state.messages.slice();
+    messages.splice(index, 1);
+    this.setState({
+      messages
+    });
+    stopMeasure();
+  }
+} //-----------------------------
+// INIT
+//-----------------------------
+
+ReactDOM.render(
+  React.createElement(Main, null),
+  document.getElementById("main")
+);

extras/benchmarks/react/index.html

@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>React Benchmark</title>
+  <link href="../shared/main.css" rel="stylesheet"/>
+  <script src='react.production.min.js'></script>
+  <script src='react-dom.production.min.js'></script>
+</head>
+<body>
+  <div id='main'></div>
+  <script src='app.js' type="module"></script>
+</body>
+</html>

extras/benchmarks/react/react-dom.production.min.js

@@ -0,0 +1,220 @@
+/** @license React v16.8.6
+ * react-dom.production.min.js
+ *
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+/*
+ Modernizr 3.0.0pre (Custom Build) | MIT
+*/
+'use strict';(function(da,pb){"object"===typeof exports&&"undefined"!==typeof module?module.exports=pb(require("react")):"function"===typeof define&&define.amd?define(["react"],pb):da.ReactDOM=pb(da.React)})(this,function(da){function pb(a,b,c,d,e,f,g,h){if(!a){a=void 0;if(void 0===b)a=Error("Minified exception occurred; use the non-minified dev environment for the full error message and additional helpful warnings.");else{var l=[c,d,e,f,g,h],k=0;a=Error(b.replace(/%s/g,function(){return l[k++]}));
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+0,ma={current:null},R={current:null};e={ReactCurrentDispatcher:ma,ReactCurrentOwner:R,assign:J};J(e,{Scheduler:{unstable_cancelCallback:function(a){var b=a.next;if(null!==b){if(b===a)c=null;else{a===c&&(c=b);var d=a.previous;d.next=b;b.previous=d}a.next=a.previous=null}},unstable_shouldYield:function(){return!G&&(null!==c&&c.expirationTime<E||H())},unstable_now:l,unstable_scheduleCallback:function(a,b){var d=-1!==k?k:l();if("object"===typeof b&&null!==b&&"number"===typeof b.timeout)b=d+b.timeout;
+else switch(f){case 1:b=d+-1;break;case 2:b=d+250;break;case 5:b=d+1073741823;break;case 4:b=d+1E4;break;default:b=d+5E3}a={callback:a,priorityLevel:f,expirationTime:b,next:null,previous:null};if(null===c)c=a.next=a.previous=a,u();else{d=null;var g=c;do{if(g.expirationTime>b){d=g;break}g=g.next}while(g!==c);null===d?d=c:d===c&&(c=a,u());b=d.previous;b.next=d.previous=a;a.next=d;a.previous=b}return a},unstable_runWithPriority:function(a,b){switch(a){case 1:case 2:case 3:case 4:case 5:break;default:a=
+3}var d=f,c=k;f=a;k=l();try{return b()}finally{f=d,k=c,F()}},unstable_next:function(a){switch(f){case 1:case 2:case 3:var b=3;break;default:b=f}var d=f,c=k;f=b;k=l();try{return a()}finally{f=d,k=c,F()}},unstable_wrapCallback:function(a){var b=f;return function(){var d=f,c=k;f=b;k=l();try{return a.apply(this,arguments)}finally{f=d,k=c,F()}}},unstable_getFirstCallbackNode:function(){return c},unstable_pauseExecution:function(){},unstable_continueExecution:function(){null!==c&&u()},unstable_getCurrentPriorityLevel:function(){return f},
+unstable_IdlePriority:5,unstable_ImmediatePriority:1,unstable_LowPriority:4,unstable_NormalPriority:3,unstable_UserBlockingPriority:2},SchedulerTracing:{__interactionsRef:null,__subscriberRef:null,unstable_clear:function(a){return a()},unstable_getCurrent:function(){return null},unstable_getThreadID:function(){return++Oa},unstable_subscribe:function(a){},unstable_trace:function(a,b,d){return d()},unstable_unsubscribe:function(a){},unstable_wrap:function(a){return a}}});var fa=Object.prototype.hasOwnProperty,
+ha={key:!0,ref:!0,__self:!0,__source:!0},la=/\/+/g,I=[];r={Children:{map:function(a,b,d){if(null==a)return a;var c=[];W(a,c,null,b,d);return c},forEach:function(a,b,d){if(null==a)return a;b=ia(null,null,b,d);V(a,xa,b);ja(b)},count:function(a){return V(a,function(){return null},null)},toArray:function(a){var b=[];W(a,b,null,function(a){return a});return b},only:function(a){S(a)?void 0:q("143");return a}},createRef:function(){return{current:null}},Component:t,PureComponent:O,createContext:function(a,
+b){void 0===b&&(b=null);a={$$typeof:Ba,_calculateChangedBits:b,_currentValue:a,_currentValue2:a,_threadCount:0,Provider:null,Consumer:null};a.Provider={$$typeof:Aa,_context:a};return a.Consumer=a},forwardRef:function(a){return{$$typeof:Da,render:a}},lazy:function(a){return{$$typeof:Ga,_ctor:a,_status:-1,_result:null}},memo:function(a,b){return{$$typeof:Fa,type:a,compare:void 0===b?null:b}},useCallback:function(a,b){return m().useCallback(a,b)},useContext:function(a,b){return m().useContext(a,b)},
+useEffect:function(a,b){return m().useEffect(a,b)},useImperativeHandle:function(a,b,d){return m().useImperativeHandle(a,b,d)},useDebugValue:function(a,b){},useLayoutEffect:function(a,b){return m().useLayoutEffect(a,b)},useMemo:function(a,b){return m().useMemo(a,b)},useReducer:function(a,b,d){return m().useReducer(a,b,d)},useRef:function(a){return m().useRef(a)},useState:function(a){return m().useState(a)},Fragment:r,StrictMode:X,Suspense:Ea,createElement:ea,cloneElement:function(a,b,d){null===a||
+void 0===a?q("267",a):void 0;var c=void 0,e=J({},a.props),f=a.key,k=a.ref,h=a._owner;if(null!=b){void 0!==b.ref&&(k=b.ref,h=R.current);void 0!==b.key&&(f=""+b.key);var l=void 0;a.type&&a.type.defaultProps&&(l=a.type.defaultProps);for(c in b)fa.call(b,c)&&!ha.hasOwnProperty(c)&&(e[c]=void 0===b[c]&&void 0!==l?l[c]:b[c])}c=arguments.length-2;if(1===c)e.children=d;else if(1<c){l=Array(c);for(var m=0;m<c;m++)l[m]=arguments[m+2];e.children=l}return{$$typeof:y,type:a.type,key:f,ref:k,props:e,_owner:h}},
+createFactory:function(a){var b=ea.bind(null,a);b.type=a;return b},isValidElement:S,version:"16.8.6",unstable_ConcurrentMode:Ca,unstable_Profiler:za,__SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED:e};r=(X={default:r},r)||X;return r.default||r});

extras/benchmarks/shared/main.css

@@ -6,26 +6,19 @@
   bottom: 0;
 
   display: grid;
-  grid-template-columns: 200px 1fr;
+  grid-template-columns: 220px 1fr;
 }
 
 .left-thing {
   background-color: gray;
   padding: 20px;
+  color: white;
 }
 
 .left-thing button {
   width: 100%;
 }
 
-.left-thing .counter span {
-  color: white;
-}
-
-.left-thing .counter button {
-  width: 40px;
-}
-
 .right-thing {
   padding: 20px;
   overflow: auto;
@@ -43,3 +36,7 @@
   border-radius: 5px;
   padding: 5px;
 }
+
+.remove {
+  float: right;
+}

extras/benchmarks/shared/utils.js

@@ -0,0 +1,49 @@
+//------------------------------------------------------------------------------
+// Generating demo data
+//------------------------------------------------------------------------------
+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];
+}
+
+let nextId = 1;
+export function buildData(n = 1000) {
+  const data = [];
+  for (let i = 0; i < n; i++) {
+      let id = nextId++;
+    data.push({
+      id: id,
+      author: chooseRandomly(AUTHORS),
+      msg: `${id}: ${chooseRandomly(CONTENT)}`,
+      likes: 0
+    });
+  }
+  return data;
+}
+
+//------------------------------------------------------------------------------
+// Measuring helpers
+//------------------------------------------------------------------------------
+let startTime;
+let lastMeasure;
+export function startMeasure(descr) {
+  startTime = performance.now();
+  lastMeasure = descr;
+}
+export function stopMeasure() {
+  let last = lastMeasure;
+  if (lastMeasure) {
+    window.setTimeout(function() {
+      lastMeasure = null;
+      const stop = performance.now();
+      console.log(`[${last}] took  ${Number(stop - startTime).toFixed()}ms`);
+    }, 0);
+  }
+}

extras/benchmarks/vue/app.js

@@ -0,0 +1,106 @@
+import { buildData, startMeasure, stopMeasure } from "../shared/utils.js";
+
+//------------------------------------------------------------------------------
+// Counter Widget
+//------------------------------------------------------------------------------
+Vue.component("likes-counter", {
+  data: function() {
+    return {
+      counter: 0
+    };
+  },
+  methods: {
+    increment() {
+      this.counter++;
+    }
+  },
+  template: `
+    <div>
+      <button @click="increment">Value: {{counter}}</button>
+    </div>`
+});
+
+//------------------------------------------------------------------------------
+// Message Widget
+//------------------------------------------------------------------------------
+Vue.component("my-message", {
+  props: ["msg"],
+  methods: {
+    removeMessage() {
+      this.$emit("removeMessage", this.msg.id);
+    }
+  },
+  template: `
+    <div class="message">
+        <span class="author">{{msg.author}}</span>
+        <span class="msg">{{msg.msg}}</span>
+        <button class="remove" @click="removeMessage">Remove</button>
+        <likes-counter></likes-counter>
+    </div>`
+});
+
+//------------------------------------------------------------------------------
+// Root Widget
+//------------------------------------------------------------------------------
+const App = {
+  name: "App",
+  data() {
+    return { messages: [] };
+  },
+  methods: {
+    addMessages(n) {
+      startMeasure("add " + n);
+      const newMessages = buildData(n);
+      this.messages.push.apply(this.messages, newMessages);
+      stopMeasure();
+    },
+
+    clear() {
+      startMeasure("clear");
+      this.messages = [];
+      stopMeasure();
+    },
+
+    updateSomeMessages() {
+      startMeasure("update every 10th");
+      const messages = this.messages;
+      for (let i = 0; i < this.messages.length; i += 10) {
+        messages[i].author += "!!!";
+      }
+      stopMeasure();
+    },
+
+    removeMessage(id) {
+      startMeasure("remove message");
+      const index = this.messages.findIndex(m => m.id === id);
+      this.messages.splice(index, 1);
+      stopMeasure();
+    }
+  },
+  template: `
+    <div class="main">
+        <div class="left-thing">
+            <div>Number of msg: {{messages.length}}</div>
+            <button @click="addMessages(100)">Add 100 messages</button>
+            <button @click="addMessages(1000)">Add 1000 messages</button>
+            <button @click="addMessages(10000)">Add 10000 messages</button>
+            <button @click="addMessages(50000)">Add 50000 messages</button>
+            <button @click="updateSomeMessages">Update every 10th message</button>
+            <button @click="clear">Clear</button>
+        </div>
+        <div class="right-thing">
+            <div class="content">
+                <my-message v-for="msg in messages" v-bind:key="msg.id" v-bind:msg="msg" @removeMessage="removeMessage"></my-message>
+            </div>
+        </div>
+    </div>
+  `
+};
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+
+new Vue({
+  render: h => h(App)
+}).$mount(`#main`);

extras/benchmarks/vue/index.html

@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>Vue.js Benchmark</title>
+  <link href="../shared/main.css" rel="stylesheet"/>
+  <script src='vue.min.js'></script>
+</head>
+<body>
+  <div id='main'></div>
+  <script src='app.js' type="module"></script>
+</body>
+</html>

extras/index.html

@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>OWL Extras</title>
+    <link rel="stylesheet" href="main.css">
+</head>
+<body>
+
+    <div class="title">
+        <h1>🦉 OWL Extra Stuff 🦉</h1>
+        <div>Mysterious OWL: A web framework for structured, dynamic and maintainable applications</div>
+    </div>
+
+    <div class="section misc">
+        <h2>Misc</h2>
+        <div class="links">
+            <a href="playground">Playground (local)</a>
+            <a href="https://github.com/odoo/owl">Github</a>
+            <a href="https://odoo.github.io/owl/">Owl main page</a>
+            <a href="https://github.com/odoo/owl/blob/master/doc/readme.md">Owl Documentation</a>
+        </div>
+    </div>
+
+    <div class="section benchmarks">
+        <h2>Benchmarks</h2>
+
+        <ul>
+            <li><a href="benchmarks/odoo-widgets-12.0">Odoo Widgets (12.0)</a></li>
+            <li><a href="benchmarks/odoo-widgets-12.3">Odoo Widgets (12.3)</a></li>
+            <li><a href="benchmarks/owl-0.7.0">OWL 0.7.0</a></li>
+            <li><a href="benchmarks/owl-0.8.0">OWL 0.8.0</a></li>
+            <li><a href="benchmarks/owl-0.9.0">OWL 0.9.0</a></li>
+            <li><a href="benchmarks/owl-0.10.0">OWL 0.10.0</a></li>
+            <li><a href="benchmarks/owl-0.11.0">OWL 0.11.0</a></li>
+            <li><a href="benchmarks/owl-master">OWL Master</a></li>
+            <li><a href="benchmarks/vue">Vue</a></li>
+            <li><a href="benchmarks/react">React</a></li>
+        </ul>
+    </div>
+
+</body>
+</html>

extras/main.css

@@ -0,0 +1,23 @@
+body {
+    font-family: sans-serif;
+}
+
+.title, .section {
+    width: 768px;
+    margin: auto;
+}
+
+.title div {
+    color: #333333;
+    font-style: italic;
+}
+.section {
+    background-color: #d5d5d5;
+    padding: 16px;
+    margin-top: 10px;
+    margin-bottom: 10px;
+}
+
+.links a {
+    margin: 10px 5px;
+}

extras/playground/app.js

@@ -0,0 +1,359 @@
+import { SAMPLES } from "./samples.js";
+
+//------------------------------------------------------------------------------
+// Constants, helpers, utils
+//------------------------------------------------------------------------------
+let owlJS;
+
+async function owlSourceCode() {
+  if (owlJS) {
+    return owlJS;
+  }
+  const result = await fetch("../owl.js");
+  owlJS = await result.text();
+  return owlJS;
+}
+
+const MODES = {
+  js: "ace/mode/javascript",
+  css: "ace/mode/css",
+  xml: "ace/mode/xml"
+};
+
+const DEFAULT_XML = `<templates>
+</templates>`;
+
+const DEFAULT_HTML = `<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>OWL App</title>
+    <link rel="icon" href="data:,">
+
+    <script src="owl.js"></script>
+    <link rel="stylesheet" href="app.css">
+    <script src="app.js"></script>
+  </head>
+  <body>
+  </body>
+</html>
+`;
+
+const APP_PY = `import sys
+import thread
+import webbrowser
+import time
+
+import BaseHTTPServer, SimpleHTTPServer
+
+def start_server():
+    httpd = BaseHTTPServer.HTTPServer(('127.0.0.1', 3600), SimpleHTTPServer.SimpleHTTPRequestHandler)
+    httpd.serve_forever()
+
+thread.start_new_thread(start_server,())
+url = 'http://127.0.0.1:3600'
+webbrowser.open_new(url)
+
+while True:
+    try:
+        time.sleep(1)
+    except KeyboardInterrupt:
+        sys.exit(0)
+`;
+
+/**
+ * Make an iframe, with all the js, css and xml properly injected.
+ */
+function makeCodeIframe(js, css, xml, errorHandler) {
+  // check templates
+  var qweb = new owl.QWeb();
+  const sanitizedXML = xml.replace(/<!--[\s\S]*?-->/g, "");
+
+  // will throw error if there is something wrong with xml
+  qweb.addTemplates(sanitizedXML);
+
+  // create iframe
+  const iframe = document.createElement("iframe");
+
+  iframe.onload = () => {
+    const doc = iframe.contentDocument;
+    // inject js
+    const owlScript = doc.createElement("script");
+    owlScript.type = "text/javascript";
+    owlScript.src = "../owl.js";
+    owlScript.addEventListener("load", () => {
+      const script = doc.createElement("script");
+      script.type = "text/javascript";
+      const content = `owl.__info__.mode = 'dev';\nwindow.TEMPLATES = \`${sanitizedXML}\`\n${js}`;
+      script.innerHTML = content;
+      iframe.contentWindow.addEventListener("error", errorHandler);
+      iframe.contentWindow.addEventListener("unhandledrejection", errorHandler);
+      setTimeout(function() {
+        if (iframe.contentWindow) {
+          iframe.contentWindow.removeEventListener("error", errorHandler);
+          iframe.contentWindow.removeEventListener(
+            "unhandledrejection",
+            errorHandler
+          );
+        }
+      }, 200);
+      doc.body.appendChild(script);
+    });
+    doc.head.appendChild(owlScript);
+
+    // inject css
+    const style = document.createElement("style");
+    style.innerHTML = css;
+    doc.head.appendChild(style);
+  };
+  return iframe;
+}
+
+/**
+ * Make a zip file containing a functioning application
+ */
+async function makeApp(js, css, xml) {
+  await owl.utils.loadJS("libs/jszip.min.js");
+
+  const zip = new JSZip();
+  const processedJS = js
+    .split("\n")
+    .map(l => (l === "" ? "" : "  " + l))
+    .join("\n");
+
+  const JS = `async function startApp() {
+  // Loading templates
+  let TEMPLATES;
+  try {
+    TEMPLATES = await owl.utils.loadTemplates('app.xml');
+  } catch(e) {
+    document.write(\`This app requires a static server.  If you have python installed, try 'python app.py'\`);
+    return;
+  }
+
+  // Application code
+${processedJS}
+}
+
+// wait for DOM ready before starting
+owl.utils.whenReady(startApp);`;
+
+  zip.file("app.js", JS);
+  zip.file("app.css", css);
+  zip.file("app.py", APP_PY);
+  zip.file("app.xml", xml);
+  zip.file("index.html", DEFAULT_HTML);
+  zip.file("owl.js", owlSourceCode());
+  return zip.generateAsync({ type: "blob" });
+}
+
+//------------------------------------------------------------------------------
+// MAIN APP
+//------------------------------------------------------------------------------
+class App extends owl.Component {
+  constructor(...args) {
+    super(...args);
+    this.version = owl.__info__.version;
+    this.SAMPLES = SAMPLES;
+    this.widgets = { TabbedEditor };
+
+    this.state = {
+      js: SAMPLES[0].code,
+      css: SAMPLES[0].css || "",
+      xml: SAMPLES[0].xml || DEFAULT_XML,
+      error: false,
+      displayWelcome: true,
+      splitLayout: true,
+      leftPaneWidth: Math.ceil(window.innerWidth / 2),
+      topPanelHeight: null
+    };
+
+    this.toggleLayout = owl.utils.debounce(this.toggleLayout, 250, true);
+    this.runCode = owl.utils.debounce(this.runCode, 250, true);
+    this.downloadCode = owl.utils.debounce(this.downloadCode, 250, true);
+  }
+
+  displayError(error) {
+    this.state.error = error;
+    if (error) {
+      setTimeout(() => {
+        this.refs.content.innerHTML = "";
+      });
+      return;
+    }
+  }
+
+  runCode() {
+    this.state.displayWelcome = false;
+    let subiframe;
+    let error = false;
+    const errorHandler = e => this.displayError(e.message || e.reason.message);
+    try {
+      const { js, css, xml } = this.state;
+      subiframe = makeCodeIframe(js, css, xml, errorHandler);
+    } catch (e) {
+      //probably problem with the templates
+      error = e;
+    }
+    if (error) {
+      this.displayError(error.message);
+      return;
+    } else {
+      this.state.error = false;
+    }
+    this.refs.content.innerHTML = "";
+    this.refs.content.appendChild(subiframe);
+  }
+
+  setSample(ev) {
+    const sample = SAMPLES.find(s => s.description === ev.target.value);
+    this.state.js = sample.code;
+    this.state.css = sample.css || "";
+    this.state.xml = sample.xml || DEFAULT_XML;
+  }
+
+  get leftPaneStyle() {
+    return `width:${this.state.leftPaneWidth}px`;
+  }
+
+  get rightPaneStyle() {
+    return `width:${window.innerWidth - 6 - this.state.leftPaneWidth}px`;
+  }
+
+  get topEditorStyle() {
+    return `flex: 0 0 ${this.state.topPanelHeight}px`;
+  }
+
+  onMouseDown() {
+    const resizer = ev => {
+      this.state.leftPaneWidth = ev.clientX;
+    };
+
+    document.body.addEventListener("mousemove", resizer);
+    for (let iframe of document.getElementsByTagName("iframe")) {
+      iframe.classList.add("disabled");
+    }
+
+    document.body.addEventListener("mouseup", () => {
+      document.body.removeEventListener("mousemove", resizer);
+      for (let iframe of document.getElementsByTagName("iframe")) {
+        iframe.classList.remove("disabled");
+      }
+    });
+  }
+  updateCode(ev) {
+    this.state[ev.type] = ev.value;
+  }
+  toggleLayout() {
+    this.state.splitLayout = !this.state.splitLayout;
+  }
+  updatePanelHeight(ev) {
+    if (!ev.delta) {
+      return;
+    }
+    let height = this.state.topPanelHeight;
+    if (!height) {
+      height = document.getElementsByClassName("tabbed-editor")[0].clientHeight;
+    }
+    this.state.topPanelHeight = height + ev.delta;
+  }
+
+  async downloadCode() {
+    const { js, css, xml } = this.state;
+    const content = await makeApp(js, css, xml);
+    await owl.utils.loadJS("libs/FileSaver.min.js");
+    saveAs(content, "app.zip");
+  }
+}
+
+//------------------------------------------------------------------------------
+// Tabbed editor
+//------------------------------------------------------------------------------
+class TabbedEditor extends owl.Component {
+  constructor(parent, props) {
+    super(parent, props);
+    this.state = {
+      currentTab: props.js ? "js" : props.xml ? "xml" : "css"
+    };
+    this.setTab = owl.utils.debounce(this.setTab, 250, true);
+
+    this.sessions = {};
+    for (let tab of ["js", "xml", "css"]) {
+      if (props[tab]) {
+        this.sessions[tab] = new ace.EditSession(props[tab], MODES[tab]);
+        this.sessions[tab].setOption("useWorker", false);
+        const tabSize = tab === "xml" ? 2 : 4;
+        this.sessions[tab].setOption("tabSize", tabSize);
+        this.sessions[tab].setUndoManager(new ace.UndoManager());
+      }
+    }
+  }
+
+  mounted() {
+    this.editor = ace.edit(this.refs.editor);
+
+    this.editor.setValue(this.props[this.state.currentTab], -1);
+    this.editor.setFontSize("12px");
+    this.editor.setTheme("ace/theme/monokai");
+    this.editor.setSession(this.sessions[this.state.currentTab]);
+    const tabSize = this.state.currentTab === "xml" ? 2 : 4;
+    this.editor.session.setOption("tabSize", tabSize);
+    this.editor.on("blur", () => {
+      const editorValue = this.editor.getValue();
+      const propsValue = this.props[this.state.currentTab];
+      if (editorValue !== propsValue) {
+        this.trigger("updateCode", {
+          type: this.state.currentTab,
+          value: editorValue
+        });
+      }
+    });
+  }
+
+  patched() {
+    const session = this.sessions[this.state.currentTab];
+    session.setValue(this.props[this.state.currentTab], -1);
+    this.editor.setSession(session);
+  }
+
+  willUnmount() {
+    this.editor.destroy();
+    delete this.editor;
+  }
+
+  setTab(tab) {
+      if (this.state.currentTab !== tab) {
+        this.state.currentTab = tab;
+        const session = this.sessions[this.state.currentTab];
+        session.doc.setValue(this.props[tab], -1);
+        this.editor.setSession(session);
+      }
+  }
+
+  onMouseDown(ev) {
+    if (ev.target.tagName === "DIV") {
+      let y = ev.clientY;
+      const resizer = ev => {
+        const delta = ev.clientY - y;
+        y = ev.clientY;
+        this.trigger("updatePanelHeight", { delta });
+      };
+      document.body.addEventListener("mousemove", resizer);
+      document.body.addEventListener("mouseup", () => {
+        document.body.removeEventListener("mousemove", resizer);
+      });
+    }
+  }
+}
+
+//------------------------------------------------------------------------------
+// Application initialization
+//------------------------------------------------------------------------------
+document.title = `${document.title} (v${owl.__info__.version})`;
+document.addEventListener("DOMContentLoaded", async function() {
+  const templates = await owl.utils.loadTemplates("templates.xml");
+  const qweb = new owl.QWeb(templates);
+  const env = { qweb };
+  const app = new App(env);
+  app.mount(document.body);
+});

extras/playground/index.html

@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <title>OWL Playground</title>
+    <link rel="icon" href="data:,">
+
+    <script src="libs/ace.js" type="text/javascript" charset="utf-8"></script>
+    <script src="../owl.js"></script>
+  <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.1/css/solid.css" integrity="sha384-QokYePQSOwpBDuhlHOsX0ymF6R/vLk/UQVz3WHa6wygxI5oGTmDTv8wahFOSspdm" crossorigin="anonymous">
+  <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.1/css/fontawesome.css" integrity="sha384-vd1e11sR28tEK9YANUtpIOdjGW14pS87bUBuOIoBILVWLFnS+MCX9T6MMf0VdPGq" crossorigin="anonymous">
+
+    <!-- Application JS/CSS -->
+    <link rel="stylesheet" href="playground.css">
+    <script type="module" src="app.js"></script>
+
+  </head>
+  <body>
+  </body>
+</html>

extras/playground/libs/FileSaver.min.js

@@ -0,0 +1,3 @@
+(function(a,b){if("function"==typeof define&&define.amd)define([],b);else if("undefined"!=typeof exports)b();else{b(),a.FileSaver={exports:{}}.exports}})(this,function(){"use strict";function b(a,b){return"undefined"==typeof b?b={autoBom:!1}:"object"!=typeof b&&(console.warn("Depricated: Expected third argument to be a object"),b={autoBom:!b}),b.autoBom&&/^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(a.type)?new Blob(["\uFEFF",a],{type:a.type}):a}function c(b,c,d){var e=new XMLHttpRequest;e.open("GET",b),e.responseType="blob",e.onload=function(){a(e.response,c,d)},e.onerror=function(){console.error("could not download file")},e.send()}function d(a){var b=new XMLHttpRequest;return b.open("HEAD",a,!1),b.send(),200<=b.status&&299>=b.status}function e(a){try{a.dispatchEvent(new MouseEvent("click"))}catch(c){var b=document.createEvent("MouseEvents");b.initMouseEvent("click",!0,!0,window,0,0,0,80,20,!1,!1,!1,!1,0,null),a.dispatchEvent(b)}}var f="object"==typeof window&&window.window===window?window:"object"==typeof self&&self.self===self?self:"object"==typeof global&&global.global===global?global:void 0,a=f.saveAs||("object"!=typeof window||window!==f?function(){}:"download"in HTMLAnchorElement.prototype?function(b,g,h){var i=f.URL||f.webkitURL,j=document.createElement("a");g=g||b.name||"download",j.download=g,j.rel="noopener","string"==typeof b?(j.href=b,j.origin===location.origin?e(j):d(j.href)?c(b,g,h):e(j,j.target="_blank")):(j.href=i.createObjectURL(b),setTimeout(function(){i.revokeObjectURL(j.href)},4E4),setTimeout(function(){e(j)},0))}:"msSaveOrOpenBlob"in navigator?function(f,g,h){if(g=g||f.name||"download","string"!=typeof f)navigator.msSaveOrOpenBlob(b(f,h),g);else if(d(f))c(f,g,h);else{var i=document.createElement("a");i.href=f,i.target="_blank",setTimeout(function(){e(i)})}}:function(a,b,d,e){if(e=e||open("","_blank"),e&&(e.document.title=e.document.body.innerText="downloading..."),"string"==typeof a)return c(a,b,d);var g="application/octet-stream"===a.type,h=/constructor/i.test(f.HTMLElement)||f.safari,i=/CriOS\/[\d]+/.test(navigator.userAgent);if((i||g&&h)&&"object"==typeof FileReader){var j=new FileReader;j.onloadend=function(){var a=j.result;a=i?a:a.replace(/^data:[^;]*;/,"data:attachment/file;"),e?e.location.href=a:location=a,e=null},j.readAsDataURL(a)}else{var k=f.URL||f.webkitURL,l=k.createObjectURL(a);e?e.location=l:location.href=l,e=null,setTimeout(function(){k.revokeObjectURL(l)},4E4)}});f.saveAs=a.saveAs=a,"undefined"!=typeof module&&(module.exports=a)});
+
+//# sourceMappingURL=FileSaver.min.js.map

extras/playground/libs/mode-css.js

@@ -0,0 +1,980 @@
+ace.define(
+  "ace/mode/css_highlight_rules",
+  [
+    "require",
+    "exports",
+    "module",
+    "ace/lib/oop",
+    "ace/lib/lang",
+    "ace/mode/text_highlight_rules"
+  ],
+  function(require, exports, module) {
+    "use strict";
+
+    var oop = require("../lib/oop");
+    var lang = require("../lib/lang");
+    var TextHighlightRules = require("./text_highlight_rules")
+      .TextHighlightRules;
+    var supportType = (exports.supportType =
+      "align-content|align-items|align-self|all|animation|animation-delay|animation-direction|animation-duration|animation-fill-mode|animation-iteration-count|animation-name|animation-play-state|animation-timing-function|backface-visibility|background|background-attachment|background-blend-mode|background-clip|background-color|background-image|background-origin|background-position|background-repeat|background-size|border|border-bottom|border-bottom-color|border-bottom-left-radius|border-bottom-right-radius|border-bottom-style|border-bottom-width|border-collapse|border-color|border-image|border-image-outset|border-image-repeat|border-image-slice|border-image-source|border-image-width|border-left|border-left-color|border-left-style|border-left-width|border-radius|border-right|border-right-color|border-right-style|border-right-width|border-spacing|border-style|border-top|border-top-color|border-top-left-radius|border-top-right-radius|border-top-style|border-top-width|border-width|bottom|box-shadow|box-sizing|caption-side|clear|clip|color|column-count|column-fill|column-gap|column-rule|column-rule-color|column-rule-style|column-rule-width|column-span|column-width|columns|content|counter-increment|counter-reset|cursor|direction|display|empty-cells|filter|flex|flex-basis|flex-direction|flex-flow|flex-grow|flex-shrink|flex-wrap|float|font|font-family|font-size|font-size-adjust|font-stretch|font-style|font-variant|font-weight|hanging-punctuation|height|justify-content|left|letter-spacing|line-height|list-style|list-style-image|list-style-position|list-style-type|margin|margin-bottom|margin-left|margin-right|margin-top|max-height|max-width|max-zoom|min-height|min-width|min-zoom|nav-down|nav-index|nav-left|nav-right|nav-up|opacity|order|outline|outline-color|outline-offset|outline-style|outline-width|overflow|overflow-x|overflow-y|padding|padding-bottom|padding-left|padding-right|padding-top|page-break-after|page-break-before|page-break-inside|perspective|perspective-origin|position|quotes|resize|right|tab-size|table-layout|text-align|text-align-last|text-decoration|text-decoration-color|text-decoration-line|text-decoration-style|text-indent|text-justify|text-overflow|text-shadow|text-transform|top|transform|transform-origin|transform-style|transition|transition-delay|transition-duration|transition-property|transition-timing-function|unicode-bidi|user-select|user-zoom|vertical-align|visibility|white-space|width|word-break|word-spacing|word-wrap|z-index");
+    var supportFunction = (exports.supportFunction =
+      "rgb|rgba|url|attr|counter|counters");
+    var supportConstant = (exports.supportConstant =
+      "absolute|after-edge|after|all-scroll|all|alphabetic|always|antialiased|armenian|auto|avoid-column|avoid-page|avoid|balance|baseline|before-edge|before|below|bidi-override|block-line-height|block|bold|bolder|border-box|both|bottom|box|break-all|break-word|capitalize|caps-height|caption|center|central|char|circle|cjk-ideographic|clone|close-quote|col-resize|collapse|column|consider-shifts|contain|content-box|cover|crosshair|cubic-bezier|dashed|decimal-leading-zero|decimal|default|disabled|disc|disregard-shifts|distribute-all-lines|distribute-letter|distribute-space|distribute|dotted|double|e-resize|ease-in|ease-in-out|ease-out|ease|ellipsis|end|exclude-ruby|fill|fixed|georgian|glyphs|grid-height|groove|hand|hanging|hebrew|help|hidden|hiragana-iroha|hiragana|horizontal|icon|ideograph-alpha|ideograph-numeric|ideograph-parenthesis|ideograph-space|ideographic|inactive|include-ruby|inherit|initial|inline-block|inline-box|inline-line-height|inline-table|inline|inset|inside|inter-ideograph|inter-word|invert|italic|justify|katakana-iroha|katakana|keep-all|last|left|lighter|line-edge|line-through|line|linear|list-item|local|loose|lower-alpha|lower-greek|lower-latin|lower-roman|lowercase|lr-tb|ltr|mathematical|max-height|max-size|medium|menu|message-box|middle|move|n-resize|ne-resize|newspaper|no-change|no-close-quote|no-drop|no-open-quote|no-repeat|none|normal|not-allowed|nowrap|nw-resize|oblique|open-quote|outset|outside|overline|padding-box|page|pointer|pre-line|pre-wrap|pre|preserve-3d|progress|relative|repeat-x|repeat-y|repeat|replaced|reset-size|ridge|right|round|row-resize|rtl|s-resize|scroll|se-resize|separate|slice|small-caps|small-caption|solid|space|square|start|static|status-bar|step-end|step-start|steps|stretch|strict|sub|super|sw-resize|table-caption|table-cell|table-column-group|table-column|table-footer-group|table-header-group|table-row-group|table-row|table|tb-rl|text-after-edge|text-before-edge|text-bottom|text-size|text-top|text|thick|thin|transparent|underline|upper-alpha|upper-latin|upper-roman|uppercase|use-script|vertical-ideographic|vertical-text|visible|w-resize|wait|whitespace|z-index|zero|zoom");
+    var supportConstantColor = (exports.supportConstantColor =
+      "aliceblue|antiquewhite|aqua|aquamarine|azure|beige|bisque|black|blanchedalmond|blue|blueviolet|brown|burlywood|cadetblue|chartreuse|chocolate|coral|cornflowerblue|cornsilk|crimson|cyan|darkblue|darkcyan|darkgoldenrod|darkgray|darkgreen|darkgrey|darkkhaki|darkmagenta|darkolivegreen|darkorange|darkorchid|darkred|darksalmon|darkseagreen|darkslateblue|darkslategray|darkslategrey|darkturquoise|darkviolet|deeppink|deepskyblue|dimgray|dimgrey|dodgerblue|firebrick|floralwhite|forestgreen|fuchsia|gainsboro|ghostwhite|gold|goldenrod|gray|green|greenyellow|grey|honeydew|hotpink|indianred|indigo|ivory|khaki|lavender|lavenderblush|lawngreen|lemonchiffon|lightblue|lightcoral|lightcyan|lightgoldenrodyellow|lightgray|lightgreen|lightgrey|lightpink|lightsalmon|lightseagreen|lightskyblue|lightslategray|lightslategrey|lightsteelblue|lightyellow|lime|limegreen|linen|magenta|maroon|mediumaquamarine|mediumblue|mediumorchid|mediumpurple|mediumseagreen|mediumslateblue|mediumspringgreen|mediumturquoise|mediumvioletred|midnightblue|mintcream|mistyrose|moccasin|navajowhite|navy|oldlace|olive|olivedrab|orange|orangered|orchid|palegoldenrod|palegreen|paleturquoise|palevioletred|papayawhip|peachpuff|peru|pink|plum|powderblue|purple|rebeccapurple|red|rosybrown|royalblue|saddlebrown|salmon|sandybrown|seagreen|seashell|sienna|silver|skyblue|slateblue|slategray|slategrey|snow|springgreen|steelblue|tan|teal|thistle|tomato|turquoise|violet|wheat|white|whitesmoke|yellow|yellowgreen");
+    var supportConstantFonts = (exports.supportConstantFonts =
+      "arial|century|comic|courier|cursive|fantasy|garamond|georgia|helvetica|impact|lucida|symbol|system|tahoma|times|trebuchet|utopia|verdana|webdings|sans-serif|serif|monospace");
+
+    var numRe = (exports.numRe =
+      "\\-?(?:(?:[0-9]+(?:\\.[0-9]+)?)|(?:\\.[0-9]+))");
+    var pseudoElements = (exports.pseudoElements =
+      "(\\:+)\\b(after|before|first-letter|first-line|moz-selection|selection)\\b");
+    var pseudoClasses = (exports.pseudoClasses =
+      "(:)\\b(active|checked|disabled|empty|enabled|first-child|first-of-type|focus|hover|indeterminate|invalid|last-child|last-of-type|link|not|nth-child|nth-last-child|nth-last-of-type|nth-of-type|only-child|only-of-type|required|root|target|valid|visited)\\b");
+
+    var CssHighlightRules = function() {
+      var keywordMapper = this.createKeywordMapper(
+        {
+          "support.function": supportFunction,
+          "support.constant": supportConstant,
+          "support.type": supportType,
+          "support.constant.color": supportConstantColor,
+          "support.constant.fonts": supportConstantFonts
+        },
+        "text",
+        true
+      );
+
+      this.$rules = {
+        start: [
+          {
+            include: ["strings", "url", "comments"]
+          },
+          {
+            token: "paren.lparen",
+            regex: "\\{",
+            next: "ruleset"
+          },
+          {
+            token: "paren.rparen",
+            regex: "\\}"
+          },
+          {
+            token: "string",
+            regex: "@(?!viewport)",
+            next: "media"
+          },
+          {
+            token: "keyword",
+            regex: "#[a-z0-9-_]+"
+          },
+          {
+            token: "keyword",
+            regex: "%"
+          },
+          {
+            token: "variable",
+            regex: "\\.[a-z0-9-_]+"
+          },
+          {
+            token: "string",
+            regex: ":[a-z0-9-_]+"
+          },
+          {
+            token: "constant.numeric",
+            regex: numRe
+          },
+          {
+            token: "constant",
+            regex: "[a-z0-9-_]+"
+          },
+          {
+            caseInsensitive: true
+          }
+        ],
+
+        media: [
+          {
+            include: ["strings", "url", "comments"]
+          },
+          {
+            token: "paren.lparen",
+            regex: "\\{",
+            next: "start"
+          },
+          {
+            token: "paren.rparen",
+            regex: "\\}",
+            next: "start"
+          },
+          {
+            token: "string",
+            regex: ";",
+            next: "start"
+          },
+          {
+            token: "keyword",
+            regex:
+              "(?:media|supports|document|charset|import|namespace|media|supports|document" +
+              "|page|font|keyframes|viewport|counter-style|font-feature-values" +
+              "|swash|ornaments|annotation|stylistic|styleset|character-variant)"
+          }
+        ],
+
+        comments: [
+          {
+            token: "comment", // multi line comment
+            regex: "\\/\\*",
+            push: [
+              {
+                token: "comment",
+                regex: "\\*\\/",
+                next: "pop"
+              },
+              {
+                defaultToken: "comment"
+              }
+            ]
+          }
+        ],
+
+        ruleset: [
+          {
+            regex: "-(webkit|ms|moz|o)-",
+            token: "text"
+          },
+          {
+            token: "punctuation.operator",
+            regex: "[:;]"
+          },
+          {
+            token: "paren.rparen",
+            regex: "\\}",
+            next: "start"
+          },
+          {
+            include: ["strings", "url", "comments"]
+          },
+          {
+            token: ["constant.numeric", "keyword"],
+            regex:
+              "(" +
+              numRe +
+              ")(ch|cm|deg|em|ex|fr|gd|grad|Hz|in|kHz|mm|ms|pc|pt|px|rad|rem|s|turn|vh|vmax|vmin|vm|vw|%)"
+          },
+          {
+            token: "constant.numeric",
+            regex: numRe
+          },
+          {
+            token: "constant.numeric", // hex6 color
+            regex: "#[a-f0-9]{6}"
+          },
+          {
+            token: "constant.numeric", // hex3 color
+            regex: "#[a-f0-9]{3}"
+          },
+          {
+            token: [
+              "punctuation",
+              "entity.other.attribute-name.pseudo-element.css"
+            ],
+            regex: pseudoElements
+          },
+          {
+            token: [
+              "punctuation",
+              "entity.other.attribute-name.pseudo-class.css"
+            ],
+            regex: pseudoClasses
+          },
+          {
+            include: "url"
+          },
+          {
+            token: keywordMapper,
+            regex: "\\-?[a-zA-Z_][a-zA-Z0-9_\\-]*"
+          },
+          {
+            caseInsensitive: true
+          }
+        ],
+
+        url: [
+          {
+            token: "support.function",
+            regex: "(?:url(:?-prefix)?|domain|regexp)\\(",
+            push: [
+              {
+                token: "support.function",
+                regex: "\\)",
+                next: "pop"
+              },
+              {
+                defaultToken: "string"
+              }
+            ]
+          }
+        ],
+
+        strings: [
+          {
+            token: "string.start",
+            regex: "'",
+            push: [
+              {
+                token: "string.end",
+                regex: "'|$",
+                next: "pop"
+              },
+              {
+                include: "escapes"
+              },
+              {
+                token: "constant.language.escape",
+                regex: /\\$/,
+                consumeLineEnd: true
+              },
+              {
+                defaultToken: "string"
+              }
+            ]
+          },
+          {
+            token: "string.start",
+            regex: '"',
+            push: [
+              {
+                token: "string.end",
+                regex: '"|$',
+                next: "pop"
+              },
+              {
+                include: "escapes"
+              },
+              {
+                token: "constant.language.escape",
+                regex: /\\$/,
+                consumeLineEnd: true
+              },
+              {
+                defaultToken: "string"
+              }
+            ]
+          }
+        ],
+        escapes: [
+          {
+            token: "constant.language.escape",
+            regex: /\\([a-fA-F\d]{1,6}|[^a-fA-F\d])/
+          }
+        ]
+      };
+
+      this.normalizeRules();
+    };
+
+    oop.inherits(CssHighlightRules, TextHighlightRules);
+
+    exports.CssHighlightRules = CssHighlightRules;
+  }
+);
+
+ace.define(
+  "ace/mode/matching_brace_outdent",
+  ["require", "exports", "module", "ace/range"],
+  function(require, exports, module) {
+    "use strict";
+
+    var Range = require("../range").Range;
+
+    var MatchingBraceOutdent = function() {};
+
+    (function() {
+      this.checkOutdent = function(line, input) {
+        if (!/^\s+$/.test(line)) return false;
+
+        return /^\s*\}/.test(input);
+      };
+
+      this.autoOutdent = function(doc, row) {
+        var line = doc.getLine(row);
+        var match = line.match(/^(\s*\})/);
+
+        if (!match) return 0;
+
+        var column = match[1].length;
+        var openBracePos = doc.findMatchingBracket({
+          row: row,
+          column: column
+        });
+
+        if (!openBracePos || openBracePos.row == row) return 0;
+
+        var indent = this.$getIndent(doc.getLine(openBracePos.row));
+        doc.replace(new Range(row, 0, row, column - 1), indent);
+      };
+
+      this.$getIndent = function(line) {
+        return line.match(/^\s*/)[0];
+      };
+    }.call(MatchingBraceOutdent.prototype));
+
+    exports.MatchingBraceOutdent = MatchingBraceOutdent;
+  }
+);
+
+ace.define(
+  "ace/mode/css_completions",
+  ["require", "exports", "module"],
+  function(require, exports, module) {
+    "use strict";
+
+    var propertyMap = {
+      background: { "#$0": 1 },
+      "background-color": { "#$0": 1, transparent: 1, fixed: 1 },
+      "background-image": { "url('/$0')": 1 },
+      "background-repeat": {
+        repeat: 1,
+        "repeat-x": 1,
+        "repeat-y": 1,
+        "no-repeat": 1,
+        inherit: 1
+      },
+      "background-position": {
+        bottom: 2,
+        center: 2,
+        left: 2,
+        right: 2,
+        top: 2,
+        inherit: 2
+      },
+      "background-attachment": { scroll: 1, fixed: 1 },
+      "background-size": { cover: 1, contain: 1 },
+      "background-clip": {
+        "border-box": 1,
+        "padding-box": 1,
+        "content-box": 1
+      },
+      "background-origin": {
+        "border-box": 1,
+        "padding-box": 1,
+        "content-box": 1
+      },
+      border: { "solid $0": 1, "dashed $0": 1, "dotted $0": 1, "#$0": 1 },
+      "border-color": { "#$0": 1 },
+      "border-style": {
+        solid: 2,
+        dashed: 2,
+        dotted: 2,
+        double: 2,
+        groove: 2,
+        hidden: 2,
+        inherit: 2,
+        inset: 2,
+        none: 2,
+        outset: 2,
+        ridged: 2
+      },
+      "border-collapse": { collapse: 1, separate: 1 },
+      bottom: { px: 1, em: 1, "%": 1 },
+      clear: { left: 1, right: 1, both: 1, none: 1 },
+      color: { "#$0": 1, "rgb(#$00,0,0)": 1 },
+      cursor: {
+        default: 1,
+        pointer: 1,
+        move: 1,
+        text: 1,
+        wait: 1,
+        help: 1,
+        progress: 1,
+        "n-resize": 1,
+        "ne-resize": 1,
+        "e-resize": 1,
+        "se-resize": 1,
+        "s-resize": 1,
+        "sw-resize": 1,
+        "w-resize": 1,
+        "nw-resize": 1
+      },
+      display: {
+        none: 1,
+        block: 1,
+        inline: 1,
+        "inline-block": 1,
+        "table-cell": 1
+      },
+      "empty-cells": { show: 1, hide: 1 },
+      float: { left: 1, right: 1, none: 1 },
+      "font-family": {
+        Arial: 2,
+        "Comic Sans MS": 2,
+        Consolas: 2,
+        "Courier New": 2,
+        Courier: 2,
+        Georgia: 2,
+        Monospace: 2,
+        "Sans-Serif": 2,
+        "Segoe UI": 2,
+        Tahoma: 2,
+        "Times New Roman": 2,
+        "Trebuchet MS": 2,
+        Verdana: 1
+      },
+      "font-size": { px: 1, em: 1, "%": 1 },
+      "font-weight": { bold: 1, normal: 1 },
+      "font-style": { italic: 1, normal: 1 },
+      "font-variant": { normal: 1, "small-caps": 1 },
+      height: { px: 1, em: 1, "%": 1 },
+      left: { px: 1, em: 1, "%": 1 },
+      "letter-spacing": { normal: 1 },
+      "line-height": { normal: 1 },
+      "list-style-type": {
+        none: 1,
+        disc: 1,
+        circle: 1,
+        square: 1,
+        decimal: 1,
+        "decimal-leading-zero": 1,
+        "lower-roman": 1,
+        "upper-roman": 1,
+        "lower-greek": 1,
+        "lower-latin": 1,
+        "upper-latin": 1,
+        georgian: 1,
+        "lower-alpha": 1,
+        "upper-alpha": 1
+      },
+      margin: { px: 1, em: 1, "%": 1 },
+      "margin-right": { px: 1, em: 1, "%": 1 },
+      "margin-left": { px: 1, em: 1, "%": 1 },
+      "margin-top": { px: 1, em: 1, "%": 1 },
+      "margin-bottom": { px: 1, em: 1, "%": 1 },
+      "max-height": { px: 1, em: 1, "%": 1 },
+      "max-width": { px: 1, em: 1, "%": 1 },
+      "min-height": { px: 1, em: 1, "%": 1 },
+      "min-width": { px: 1, em: 1, "%": 1 },
+      overflow: { hidden: 1, visible: 1, auto: 1, scroll: 1 },
+      "overflow-x": { hidden: 1, visible: 1, auto: 1, scroll: 1 },
+      "overflow-y": { hidden: 1, visible: 1, auto: 1, scroll: 1 },
+      padding: { px: 1, em: 1, "%": 1 },
+      "padding-top": { px: 1, em: 1, "%": 1 },
+      "padding-right": { px: 1, em: 1, "%": 1 },
+      "padding-bottom": { px: 1, em: 1, "%": 1 },
+      "padding-left": { px: 1, em: 1, "%": 1 },
+      "page-break-after": { auto: 1, always: 1, avoid: 1, left: 1, right: 1 },
+      "page-break-before": { auto: 1, always: 1, avoid: 1, left: 1, right: 1 },
+      position: { absolute: 1, relative: 1, fixed: 1, static: 1 },
+      right: { px: 1, em: 1, "%": 1 },
+      "table-layout": { fixed: 1, auto: 1 },
+      "text-decoration": { none: 1, underline: 1, "line-through": 1, blink: 1 },
+      "text-align": { left: 1, right: 1, center: 1, justify: 1 },
+      "text-transform": { capitalize: 1, uppercase: 1, lowercase: 1, none: 1 },
+      top: { px: 1, em: 1, "%": 1 },
+      "vertical-align": { top: 1, bottom: 1 },
+      visibility: { hidden: 1, visible: 1 },
+      "white-space": {
+        nowrap: 1,
+        normal: 1,
+        pre: 1,
+        "pre-line": 1,
+        "pre-wrap": 1
+      },
+      width: { px: 1, em: 1, "%": 1 },
+      "word-spacing": { normal: 1 },
+      filter: { "alpha(opacity=$0100)": 1 },
+
+      "text-shadow": { "$02px 2px 2px #777": 1 },
+      "text-overflow": { "ellipsis-word": 1, clip: 1, ellipsis: 1 },
+      "-moz-border-radius": 1,
+      "-moz-border-radius-topright": 1,
+      "-moz-border-radius-bottomright": 1,
+      "-moz-border-radius-topleft": 1,
+      "-moz-border-radius-bottomleft": 1,
+      "-webkit-border-radius": 1,
+      "-webkit-border-top-right-radius": 1,
+      "-webkit-border-top-left-radius": 1,
+      "-webkit-border-bottom-right-radius": 1,
+      "-webkit-border-bottom-left-radius": 1,
+      "-moz-box-shadow": 1,
+      "-webkit-box-shadow": 1,
+      transform: { "rotate($00deg)": 1, "skew($00deg)": 1 },
+      "-moz-transform": { "rotate($00deg)": 1, "skew($00deg)": 1 },
+      "-webkit-transform": { "rotate($00deg)": 1, "skew($00deg)": 1 }
+    };
+
+    var CssCompletions = function() {};
+
+    (function() {
+      this.completionsDefined = false;
+
+      this.defineCompletions = function() {
+        if (document) {
+          var style = document.createElement("c").style;
+
+          for (var i in style) {
+            if (typeof style[i] !== "string") continue;
+
+            var name = i.replace(/[A-Z]/g, function(x) {
+              return "-" + x.toLowerCase();
+            });
+
+            if (!propertyMap.hasOwnProperty(name)) propertyMap[name] = 1;
+          }
+        }
+
+        this.completionsDefined = true;
+      };
+
+      this.getCompletions = function(state, session, pos, prefix) {
+        if (!this.completionsDefined) {
+          this.defineCompletions();
+        }
+
+        if (state === "ruleset" || session.$mode.$id == "ace/mode/scss") {
+          var line = session.getLine(pos.row).substr(0, pos.column);
+          if (/:[^;]+$/.test(line)) {
+            /([\w\-]+):[^:]*$/.test(line);
+
+            return this.getPropertyValueCompletions(
+              state,
+              session,
+              pos,
+              prefix
+            );
+          } else {
+            return this.getPropertyCompletions(state, session, pos, prefix);
+          }
+        }
+
+        return [];
+      };
+
+      this.getPropertyCompletions = function(state, session, pos, prefix) {
+        var properties = Object.keys(propertyMap);
+        return properties.map(function(property) {
+          return {
+            caption: property,
+            snippet: property + ": $0;",
+            meta: "property",
+            score: 1000000
+          };
+        });
+      };
+
+      this.getPropertyValueCompletions = function(state, session, pos, prefix) {
+        var line = session.getLine(pos.row).substr(0, pos.column);
+        var property = (/([\w\-]+):[^:]*$/.exec(line) || {})[1];
+
+        if (!property) return [];
+        var values = [];
+        if (
+          property in propertyMap &&
+          typeof propertyMap[property] === "object"
+        ) {
+          values = Object.keys(propertyMap[property]);
+        }
+        return values.map(function(value) {
+          return {
+            caption: value,
+            snippet: value,
+            meta: "property value",
+            score: 1000000
+          };
+        });
+      };
+    }.call(CssCompletions.prototype));
+
+    exports.CssCompletions = CssCompletions;
+  }
+);
+
+ace.define(
+  "ace/mode/behaviour/css",
+  [
+    "require",
+    "exports",
+    "module",
+    "ace/lib/oop",
+    "ace/mode/behaviour",
+    "ace/mode/behaviour/cstyle",
+    "ace/token_iterator"
+  ],
+  function(require, exports, module) {
+    "use strict";
+
+    var oop = require("../../lib/oop");
+    var Behaviour = require("../behaviour").Behaviour;
+    var CstyleBehaviour = require("./cstyle").CstyleBehaviour;
+    var TokenIterator = require("../../token_iterator").TokenIterator;
+
+    var CssBehaviour = function() {
+      this.inherit(CstyleBehaviour);
+
+      this.add("colon", "insertion", function(
+        state,
+        action,
+        editor,
+        session,
+        text
+      ) {
+        if (text === ":" && editor.selection.isEmpty()) {
+          var cursor = editor.getCursorPosition();
+          var iterator = new TokenIterator(session, cursor.row, cursor.column);
+          var token = iterator.getCurrentToken();
+          if (token && token.value.match(/\s+/)) {
+            token = iterator.stepBackward();
+          }
+          if (token && token.type === "support.type") {
+            var line = session.doc.getLine(cursor.row);
+            var rightChar = line.substring(cursor.column, cursor.column + 1);
+            if (rightChar === ":") {
+              return {
+                text: "",
+                selection: [1, 1]
+              };
+            }
+            if (/^(\s+[^;]|\s*$)/.test(line.substring(cursor.column))) {
+              return {
+                text: ":;",
+                selection: [1, 1]
+              };
+            }
+          }
+        }
+      });
+
+      this.add("colon", "deletion", function(
+        state,
+        action,
+        editor,
+        session,
+        range
+      ) {
+        var selected = session.doc.getTextRange(range);
+        if (!range.isMultiLine() && selected === ":") {
+          var cursor = editor.getCursorPosition();
+          var iterator = new TokenIterator(session, cursor.row, cursor.column);
+          var token = iterator.getCurrentToken();
+          if (token && token.value.match(/\s+/)) {
+            token = iterator.stepBackward();
+          }
+          if (token && token.type === "support.type") {
+            var line = session.doc.getLine(range.start.row);
+            var rightChar = line.substring(
+              range.end.column,
+              range.end.column + 1
+            );
+            if (rightChar === ";") {
+              range.end.column++;
+              return range;
+            }
+          }
+        }
+      });
+
+      this.add("semicolon", "insertion", function(
+        state,
+        action,
+        editor,
+        session,
+        text
+      ) {
+        if (text === ";" && editor.selection.isEmpty()) {
+          var cursor = editor.getCursorPosition();
+          var line = session.doc.getLine(cursor.row);
+          var rightChar = line.substring(cursor.column, cursor.column + 1);
+          if (rightChar === ";") {
+            return {
+              text: "",
+              selection: [1, 1]
+            };
+          }
+        }
+      });
+
+      this.add("!important", "insertion", function(
+        state,
+        action,
+        editor,
+        session,
+        text
+      ) {
+        if (text === "!" && editor.selection.isEmpty()) {
+          var cursor = editor.getCursorPosition();
+          var line = session.doc.getLine(cursor.row);
+
+          if (/^\s*(;|}|$)/.test(line.substring(cursor.column))) {
+            return {
+              text: "!important",
+              selection: [10, 10]
+            };
+          }
+        }
+      });
+    };
+    oop.inherits(CssBehaviour, CstyleBehaviour);
+
+    exports.CssBehaviour = CssBehaviour;
+  }
+);
+
+ace.define(
+  "ace/mode/folding/cstyle",
+  [
+    "require",
+    "exports",
+    "module",
+    "ace/lib/oop",
+    "ace/range",
+    "ace/mode/folding/fold_mode"
+  ],
+  function(require, exports, module) {
+    "use strict";
+
+    var oop = require("../../lib/oop");
+    var Range = require("../../range").Range;
+    var BaseFoldMode = require("./fold_mode").FoldMode;
+
+    var FoldMode = (exports.FoldMode = function(commentRegex) {
+      if (commentRegex) {
+        this.foldingStartMarker = new RegExp(
+          this.foldingStartMarker.source.replace(
+            /\|[^|]*?$/,
+            "|" + commentRegex.start
+          )
+        );
+        this.foldingStopMarker = new RegExp(
+          this.foldingStopMarker.source.replace(
+            /\|[^|]*?$/,
+            "|" + commentRegex.end
+          )
+        );
+      }
+    });
+    oop.inherits(FoldMode, BaseFoldMode);
+
+    (function() {
+      this.foldingStartMarker = /([\{\[\(])[^\}\]\)]*$|^\s*(\/\*)/;
+      this.foldingStopMarker = /^[^\[\{\(]*([\}\]\)])|^[\s\*]*(\*\/)/;
+      this.singleLineBlockCommentRe = /^\s*(\/\*).*\*\/\s*$/;
+      this.tripleStarBlockCommentRe = /^\s*(\/\*\*\*).*\*\/\s*$/;
+      this.startRegionRe = /^\s*(\/\*|\/\/)#?region\b/;
+      this._getFoldWidgetBase = this.getFoldWidget;
+      this.getFoldWidget = function(session, foldStyle, row) {
+        var line = session.getLine(row);
+
+        if (this.singleLineBlockCommentRe.test(line)) {
+          if (
+            !this.startRegionRe.test(line) &&
+            !this.tripleStarBlockCommentRe.test(line)
+          )
+            return "";
+        }
+
+        var fw = this._getFoldWidgetBase(session, foldStyle, row);
+
+        if (!fw && this.startRegionRe.test(line)) return "start"; // lineCommentRegionStart
+
+        return fw;
+      };
+
+      this.getFoldWidgetRange = function(
+        session,
+        foldStyle,
+        row,
+        forceMultiline
+      ) {
+        var line = session.getLine(row);
+
+        if (this.startRegionRe.test(line))
+          return this.getCommentRegionBlock(session, line, row);
+
+        var match = line.match(this.foldingStartMarker);
+        if (match) {
+          var i = match.index;
+
+          if (match[1])
+            return this.openingBracketBlock(session, match[1], row, i);
+
+          var range = session.getCommentFoldRange(row, i + match[0].length, 1);
+
+          if (range && !range.isMultiLine()) {
+            if (forceMultiline) {
+              range = this.getSectionRange(session, row);
+            } else if (foldStyle != "all") range = null;
+          }
+
+          return range;
+        }
+
+        if (foldStyle === "markbegin") return;
+
+        var match = line.match(this.foldingStopMarker);
+        if (match) {
+          var i = match.index + match[0].length;
+
+          if (match[1])
+            return this.closingBracketBlock(session, match[1], row, i);
+
+          return session.getCommentFoldRange(row, i, -1);
+        }
+      };
+
+      this.getSectionRange = function(session, row) {
+        var line = session.getLine(row);
+        var startIndent = line.search(/\S/);
+        var startRow = row;
+        var startColumn = line.length;
+        row = row + 1;
+        var endRow = row;
+        var maxRow = session.getLength();
+        while (++row < maxRow) {
+          line = session.getLine(row);
+          var indent = line.search(/\S/);
+          if (indent === -1) continue;
+          if (startIndent > indent) break;
+          var subRange = this.getFoldWidgetRange(session, "all", row);
+
+          if (subRange) {
+            if (subRange.start.row <= startRow) {
+              break;
+            } else if (subRange.isMultiLine()) {
+              row = subRange.end.row;
+            } else if (startIndent == indent) {
+              break;
+            }
+          }
+          endRow = row;
+        }
+
+        return new Range(
+          startRow,
+          startColumn,
+          endRow,
+          session.getLine(endRow).length
+        );
+      };
+      this.getCommentRegionBlock = function(session, line, row) {
+        var startColumn = line.search(/\s*$/);
+        var maxRow = session.getLength();
+        var startRow = row;
+
+        var re = /^\s*(?:\/\*|\/\/|--)#?(end)?region\b/;
+        var depth = 1;
+        while (++row < maxRow) {
+          line = session.getLine(row);
+          var m = re.exec(line);
+          if (!m) continue;
+          if (m[1]) depth--;
+          else depth++;
+
+          if (!depth) break;
+        }
+
+        var endRow = row;
+        if (endRow > startRow) {
+          return new Range(startRow, startColumn, endRow, line.length);
+        }
+      };
+    }.call(FoldMode.prototype));
+  }
+);
+
+ace.define(
+  "ace/mode/css",
+  [
+    "require",
+    "exports",
+    "module",
+    "ace/lib/oop",
+    "ace/mode/text",
+    "ace/mode/css_highlight_rules",
+    "ace/mode/matching_brace_outdent",
+    "ace/worker/worker_client",
+    "ace/mode/css_completions",
+    "ace/mode/behaviour/css",
+    "ace/mode/folding/cstyle"
+  ],
+  function(require, exports, module) {
+    "use strict";
+
+    var oop = require("../lib/oop");
+    var TextMode = require("./text").Mode;
+    var CssHighlightRules = require("./css_highlight_rules").CssHighlightRules;
+    var MatchingBraceOutdent = require("./matching_brace_outdent")
+      .MatchingBraceOutdent;
+    var WorkerClient = require("../worker/worker_client").WorkerClient;
+    var CssCompletions = require("./css_completions").CssCompletions;
+    var CssBehaviour = require("./behaviour/css").CssBehaviour;
+    var CStyleFoldMode = require("./folding/cstyle").FoldMode;
+
+    var Mode = function() {
+      this.HighlightRules = CssHighlightRules;
+      this.$outdent = new MatchingBraceOutdent();
+      this.$behaviour = new CssBehaviour();
+      this.$completer = new CssCompletions();
+      this.foldingRules = new CStyleFoldMode();
+    };
+    oop.inherits(Mode, TextMode);
+
+    (function() {
+      this.foldingRules = "cStyle";
+      this.blockComment = { start: "/*", end: "*/" };
+
+      this.getNextLineIndent = function(state, line, tab) {
+        var indent = this.$getIndent(line);
+        var tokens = this.getTokenizer().getLineTokens(line, state).tokens;
+        if (tokens.length && tokens[tokens.length - 1].type == "comment") {
+          return indent;
+        }
+
+        var match = line.match(/^.*\{\s*$/);
+        if (match) {
+          indent += tab;
+        }
+
+        return indent;
+      };
+
+      this.checkOutdent = function(state, line, input) {
+        return this.$outdent.checkOutdent(line, input);
+      };
+
+      this.autoOutdent = function(state, doc, row) {
+        this.$outdent.autoOutdent(doc, row);
+      };
+
+      this.getCompletions = function(state, session, pos, prefix) {
+        return this.$completer.getCompletions(state, session, pos, prefix);
+      };
+
+      this.createWorker = function(session) {
+        var worker = new WorkerClient(["ace"], "ace/mode/css_worker", "Worker");
+        worker.attachToDocument(session.getDocument());
+
+        worker.on("annotate", function(e) {
+          session.setAnnotations(e.data);
+        });
+
+        worker.on("terminate", function() {
+          session.clearAnnotations();
+        });
+
+        return worker;
+      };
+
+      this.$id = "ace/mode/css";
+    }.call(Mode.prototype));
+
+    exports.Mode = Mode;
+  }
+);
+(function() {
+  ace.require(["ace/mode/css"], function(m) {
+    if (typeof module == "object" && typeof exports == "object" && module) {
+      module.exports = m;
+    }
+  });
+})();

extras/playground/libs/mode-xml.js

@@ -0,0 +1,820 @@
+ace.define(
+  "ace/mode/xml_highlight_rules",
+  [
+    "require",
+    "exports",
+    "module",
+    "ace/lib/oop",
+    "ace/mode/text_highlight_rules"
+  ],
+  function(require, exports, module) {
+    "use strict";
+
+    var oop = require("../lib/oop");
+    var TextHighlightRules = require("./text_highlight_rules")
+      .TextHighlightRules;
+
+    var XmlHighlightRules = function(normalize) {
+      var tagRegex = "[_:a-zA-Z\xc0-\uffff][-_:.a-zA-Z0-9\xc0-\uffff]*";
+
+      this.$rules = {
+        start: [
+          {
+            token: "string.cdata.xml",
+            regex: "<\\!\\[CDATA\\[",
+            next: "cdata"
+          },
+          {
+            token: ["punctuation.instruction.xml", "keyword.instruction.xml"],
+            regex: "(<\\?)(" + tagRegex + ")",
+            next: "processing_instruction"
+          },
+          { token: "comment.start.xml", regex: "<\\!--", next: "comment" },
+          {
+            token: ["xml-pe.doctype.xml", "xml-pe.doctype.xml"],
+            regex: "(<\\!)(DOCTYPE)(?=[\\s])",
+            next: "doctype",
+            caseInsensitive: true
+          },
+          { include: "tag" },
+          { token: "text.end-tag-open.xml", regex: "</" },
+          { token: "text.tag-open.xml", regex: "<" },
+          { include: "reference" },
+          { defaultToken: "text.xml" }
+        ],
+
+        processing_instruction: [
+          {
+            token: "entity.other.attribute-name.decl-attribute-name.xml",
+            regex: tagRegex
+          },
+          {
+            token: "keyword.operator.decl-attribute-equals.xml",
+            regex: "="
+          },
+          {
+            include: "whitespace"
+          },
+          {
+            include: "string"
+          },
+          {
+            token: "punctuation.xml-decl.xml",
+            regex: "\\?>",
+            next: "start"
+          }
+        ],
+
+        doctype: [
+          { include: "whitespace" },
+          { include: "string" },
+          { token: "xml-pe.doctype.xml", regex: ">", next: "start" },
+          { token: "xml-pe.xml", regex: "[-_a-zA-Z0-9:]+" },
+          { token: "punctuation.int-subset", regex: "\\[", push: "int_subset" }
+        ],
+
+        int_subset: [
+          {
+            token: "text.xml",
+            regex: "\\s+"
+          },
+          {
+            token: "punctuation.int-subset.xml",
+            regex: "]",
+            next: "pop"
+          },
+          {
+            token: ["punctuation.markup-decl.xml", "keyword.markup-decl.xml"],
+            regex: "(<\\!)(" + tagRegex + ")",
+            push: [
+              {
+                token: "text",
+                regex: "\\s+"
+              },
+              {
+                token: "punctuation.markup-decl.xml",
+                regex: ">",
+                next: "pop"
+              },
+              { include: "string" }
+            ]
+          }
+        ],
+
+        cdata: [
+          { token: "string.cdata.xml", regex: "\\]\\]>", next: "start" },
+          { token: "text.xml", regex: "\\s+" },
+          { token: "text.xml", regex: "(?:[^\\]]|\\](?!\\]>))+" }
+        ],
+
+        comment: [
+          { token: "comment.end.xml", regex: "-->", next: "start" },
+          { defaultToken: "comment.xml" }
+        ],
+
+        reference: [
+          {
+            token: "constant.language.escape.reference.xml",
+            regex: "(?:&#[0-9]+;)|(?:&#x[0-9a-fA-F]+;)|(?:&[a-zA-Z0-9_:\\.-]+;)"
+          }
+        ],
+
+        attr_reference: [
+          {
+            token: "constant.language.escape.reference.attribute-value.xml",
+            regex: "(?:&#[0-9]+;)|(?:&#x[0-9a-fA-F]+;)|(?:&[a-zA-Z0-9_:\\.-]+;)"
+          }
+        ],
+
+        tag: [
+          {
+            token: [
+              "meta.tag.punctuation.tag-open.xml",
+              "meta.tag.punctuation.end-tag-open.xml",
+              "meta.tag.tag-name.xml"
+            ],
+            regex: "(?:(<)|(</))((?:" + tagRegex + ":)?" + tagRegex + ")",
+            next: [
+              { include: "attributes" },
+              {
+                token: "meta.tag.punctuation.tag-close.xml",
+                regex: "/?>",
+                next: "start"
+              }
+            ]
+          }
+        ],
+
+        tag_whitespace: [{ token: "text.tag-whitespace.xml", regex: "\\s+" }],
+        whitespace: [{ token: "text.whitespace.xml", regex: "\\s+" }],
+        string: [
+          {
+            token: "string.xml",
+            regex: "'",
+            push: [
+              { token: "string.xml", regex: "'", next: "pop" },
+              { defaultToken: "string.xml" }
+            ]
+          },
+          {
+            token: "string.xml",
+            regex: '"',
+            push: [
+              { token: "string.xml", regex: '"', next: "pop" },
+              { defaultToken: "string.xml" }
+            ]
+          }
+        ],
+
+        attributes: [
+          {
+            token: "entity.other.attribute-name.xml",
+            regex: tagRegex
+          },
+          {
+            token: "keyword.operator.attribute-equals.xml",
+            regex: "="
+          },
+          {
+            include: "tag_whitespace"
+          },
+          {
+            include: "attribute_value"
+          }
+        ],
+
+        attribute_value: [
+          {
+            token: "string.attribute-value.xml",
+            regex: "'",
+            push: [
+              { token: "string.attribute-value.xml", regex: "'", next: "pop" },
+              { include: "attr_reference" },
+              { defaultToken: "string.attribute-value.xml" }
+            ]
+          },
+          {
+            token: "string.attribute-value.xml",
+            regex: '"',
+            push: [
+              { token: "string.attribute-value.xml", regex: '"', next: "pop" },
+              { include: "attr_reference" },
+              { defaultToken: "string.attribute-value.xml" }
+            ]
+          }
+        ]
+      };
+
+      if (this.constructor === XmlHighlightRules) this.normalizeRules();
+    };
+
+    (function() {
+      this.embedTagRules = function(HighlightRules, prefix, tag) {
+        this.$rules.tag.unshift({
+          token: [
+            "meta.tag.punctuation.tag-open.xml",
+            "meta.tag." + tag + ".tag-name.xml"
+          ],
+          regex: "(<)(" + tag + "(?=\\s|>|$))",
+          next: [
+            { include: "attributes" },
+            {
+              token: "meta.tag.punctuation.tag-close.xml",
+              regex: "/?>",
+              next: prefix + "start"
+            }
+          ]
+        });
+
+        this.$rules[tag + "-end"] = [
+          { include: "attributes" },
+          {
+            token: "meta.tag.punctuation.tag-close.xml",
+            regex: "/?>",
+            next: "start",
+            onMatch: function(value, currentState, stack) {
+              stack.splice(0);
+              return this.token;
+            }
+          }
+        ];
+
+        this.embedRules(HighlightRules, prefix, [
+          {
+            token: [
+              "meta.tag.punctuation.end-tag-open.xml",
+              "meta.tag." + tag + ".tag-name.xml"
+            ],
+            regex: "(</)(" + tag + "(?=\\s|>|$))",
+            next: tag + "-end"
+          },
+          {
+            token: "string.cdata.xml",
+            regex: "<\\!\\[CDATA\\["
+          },
+          {
+            token: "string.cdata.xml",
+            regex: "\\]\\]>"
+          }
+        ]);
+      };
+    }.call(TextHighlightRules.prototype));
+
+    oop.inherits(XmlHighlightRules, TextHighlightRules);
+
+    exports.XmlHighlightRules = XmlHighlightRules;
+  }
+);
+
+ace.define(
+  "ace/mode/behaviour/xml",
+  [
+    "require",
+    "exports",
+    "module",
+    "ace/lib/oop",
+    "ace/mode/behaviour",
+    "ace/token_iterator",
+    "ace/lib/lang"
+  ],
+  function(require, exports, module) {
+    "use strict";
+
+    var oop = require("../../lib/oop");
+    var Behaviour = require("../behaviour").Behaviour;
+    var TokenIterator = require("../../token_iterator").TokenIterator;
+    var lang = require("../../lib/lang");
+
+    function is(token, type) {
+      return token && token.type.lastIndexOf(type + ".xml") > -1;
+    }
+
+    var XmlBehaviour = function() {
+      this.add("string_dquotes", "insertion", function(
+        state,
+        action,
+        editor,
+        session,
+        text
+      ) {
+        if (text == '"' || text == "'") {
+          var quote = text;
+          var selected = session.doc.getTextRange(editor.getSelectionRange());
+          if (
+            selected !== "" &&
+            selected !== "'" &&
+            selected != '"' &&
+            editor.getWrapBehavioursEnabled()
+          ) {
+            return {
+              text: quote + selected + quote,
+              selection: false
+            };
+          }
+
+          var cursor = editor.getCursorPosition();
+          var line = session.doc.getLine(cursor.row);
+          var rightChar = line.substring(cursor.column, cursor.column + 1);
+          var iterator = new TokenIterator(session, cursor.row, cursor.column);
+          var token = iterator.getCurrentToken();
+
+          if (
+            rightChar == quote &&
+            (is(token, "attribute-value") || is(token, "string"))
+          ) {
+            return {
+              text: "",
+              selection: [1, 1]
+            };
+          }
+
+          if (!token) token = iterator.stepBackward();
+
+          if (!token) return;
+
+          while (is(token, "tag-whitespace") || is(token, "whitespace")) {
+            token = iterator.stepBackward();
+          }
+          var rightSpace = !rightChar || rightChar.match(/\s/);
+          if (
+            (is(token, "attribute-equals") &&
+              (rightSpace || rightChar == ">")) ||
+            (is(token, "decl-attribute-equals") &&
+              (rightSpace || rightChar == "?"))
+          ) {
+            return {
+              text: quote + quote,
+              selection: [1, 1]
+            };
+          }
+        }
+      });
+
+      this.add("string_dquotes", "deletion", function(
+        state,
+        action,
+        editor,
+        session,
+        range
+      ) {
+        var selected = session.doc.getTextRange(range);
+        if (!range.isMultiLine() && (selected == '"' || selected == "'")) {
+          var line = session.doc.getLine(range.start.row);
+          var rightChar = line.substring(
+            range.start.column + 1,
+            range.start.column + 2
+          );
+          if (rightChar == selected) {
+            range.end.column++;
+            return range;
+          }
+        }
+      });
+
+      this.add("autoclosing", "insertion", function(
+        state,
+        action,
+        editor,
+        session,
+        text
+      ) {
+        if (text == ">") {
+          var position = editor.getSelectionRange().start;
+          var iterator = new TokenIterator(
+            session,
+            position.row,
+            position.column
+          );
+          var token = iterator.getCurrentToken() || iterator.stepBackward();
+          if (
+            !token ||
+            !(
+              is(token, "tag-name") ||
+              is(token, "tag-whitespace") ||
+              is(token, "attribute-name") ||
+              is(token, "attribute-equals") ||
+              is(token, "attribute-value")
+            )
+          )
+            return;
+          if (is(token, "reference.attribute-value")) return;
+          if (is(token, "attribute-value")) {
+            var tokenEndColumn =
+              iterator.getCurrentTokenColumn() + token.value.length;
+            if (position.column < tokenEndColumn) return;
+            if (position.column == tokenEndColumn) {
+              var nextToken = iterator.stepForward();
+              if (nextToken && is(nextToken, "attribute-value")) return;
+              iterator.stepBackward();
+            }
+          }
+
+          if (
+            /^\s*>/.test(session.getLine(position.row).slice(position.column))
+          )
+            return;
+          while (!is(token, "tag-name")) {
+            token = iterator.stepBackward();
+            if (token.value == "<") {
+              token = iterator.stepForward();
+              break;
+            }
+          }
+
+          var tokenRow = iterator.getCurrentTokenRow();
+          var tokenColumn = iterator.getCurrentTokenColumn();
+          if (is(iterator.stepBackward(), "end-tag-open")) return;
+
+          var element = token.value;
+          if (tokenRow == position.row)
+            element = element.substring(0, position.column - tokenColumn);
+
+          if (this.voidElements.hasOwnProperty(element.toLowerCase())) return;
+
+          return {
+            text: ">" + "</" + element + ">",
+            selection: [1, 1]
+          };
+        }
+      });
+
+      this.add("autoindent", "insertion", function(
+        state,
+        action,
+        editor,
+        session,
+        text
+      ) {
+        if (text == "\n") {
+          var cursor = editor.getCursorPosition();
+          var line = session.getLine(cursor.row);
+          var iterator = new TokenIterator(session, cursor.row, cursor.column);
+          var token = iterator.getCurrentToken();
+
+          if (token && token.type.indexOf("tag-close") !== -1) {
+            if (token.value == "/>") return;
+            while (token && token.type.indexOf("tag-name") === -1) {
+              token = iterator.stepBackward();
+            }
+
+            if (!token) {
+              return;
+            }
+
+            var tag = token.value;
+            var row = iterator.getCurrentTokenRow();
+            token = iterator.stepBackward();
+            if (!token || token.type.indexOf("end-tag") !== -1) {
+              return;
+            }
+
+            if (this.voidElements && !this.voidElements[tag]) {
+              var nextToken = session.getTokenAt(cursor.row, cursor.column + 1);
+              var line = session.getLine(row);
+              var nextIndent = this.$getIndent(line);
+              var indent = nextIndent + session.getTabString();
+
+              if (nextToken && nextToken.value === "</") {
+                return {
+                  text: "\n" + indent + "\n" + nextIndent,
+                  selection: [1, indent.length, 1, indent.length]
+                };
+              } else {
+                return {
+                  text: "\n" + indent
+                };
+              }
+            }
+          }
+        }
+      });
+    };
+
+    oop.inherits(XmlBehaviour, Behaviour);
+
+    exports.XmlBehaviour = XmlBehaviour;
+  }
+);
+
+ace.define(
+  "ace/mode/folding/xml",
+  [
+    "require",
+    "exports",
+    "module",
+    "ace/lib/oop",
+    "ace/lib/lang",
+    "ace/range",
+    "ace/mode/folding/fold_mode",
+    "ace/token_iterator"
+  ],
+  function(require, exports, module) {
+    "use strict";
+
+    var oop = require("../../lib/oop");
+    var lang = require("../../lib/lang");
+    var Range = require("../../range").Range;
+    var BaseFoldMode = require("./fold_mode").FoldMode;
+    var TokenIterator = require("../../token_iterator").TokenIterator;
+
+    var FoldMode = (exports.FoldMode = function(voidElements, optionalEndTags) {
+      BaseFoldMode.call(this);
+      this.voidElements = voidElements || {};
+      this.optionalEndTags = oop.mixin({}, this.voidElements);
+      if (optionalEndTags) oop.mixin(this.optionalEndTags, optionalEndTags);
+    });
+    oop.inherits(FoldMode, BaseFoldMode);
+
+    var Tag = function() {
+      this.tagName = "";
+      this.closing = false;
+      this.selfClosing = false;
+      this.start = { row: 0, column: 0 };
+      this.end = { row: 0, column: 0 };
+    };
+
+    function is(token, type) {
+      return token.type.lastIndexOf(type + ".xml") > -1;
+    }
+
+    (function() {
+      this.getFoldWidget = function(session, foldStyle, row) {
+        var tag = this._getFirstTagInLine(session, row);
+
+        if (!tag) return this.getCommentFoldWidget(session, row);
+
+        if (tag.closing || (!tag.tagName && tag.selfClosing))
+          return foldStyle == "markbeginend" ? "end" : "";
+
+        if (
+          !tag.tagName ||
+          tag.selfClosing ||
+          this.voidElements.hasOwnProperty(tag.tagName.toLowerCase())
+        )
+          return "";
+
+        if (this._findEndTagInLine(session, row, tag.tagName, tag.end.column))
+          return "";
+
+        return "start";
+      };
+
+      this.getCommentFoldWidget = function(session, row) {
+        if (
+          /comment/.test(session.getState(row)) &&
+          /<!-/.test(session.getLine(row))
+        )
+          return "start";
+        return "";
+      };
+      this._getFirstTagInLine = function(session, row) {
+        var tokens = session.getTokens(row);
+        var tag = new Tag();
+
+        for (var i = 0; i < tokens.length; i++) {
+          var token = tokens[i];
+          if (is(token, "tag-open")) {
+            tag.end.column = tag.start.column + token.value.length;
+            tag.closing = is(token, "end-tag-open");
+            token = tokens[++i];
+            if (!token) return null;
+            tag.tagName = token.value;
+            tag.end.column += token.value.length;
+            for (i++; i < tokens.length; i++) {
+              token = tokens[i];
+              tag.end.column += token.value.length;
+              if (is(token, "tag-close")) {
+                tag.selfClosing = token.value == "/>";
+                break;
+              }
+            }
+            return tag;
+          } else if (is(token, "tag-close")) {
+            tag.selfClosing = token.value == "/>";
+            return tag;
+          }
+          tag.start.column += token.value.length;
+        }
+
+        return null;
+      };
+
+      this._findEndTagInLine = function(session, row, tagName, startColumn) {
+        var tokens = session.getTokens(row);
+        var column = 0;
+        for (var i = 0; i < tokens.length; i++) {
+          var token = tokens[i];
+          column += token.value.length;
+          if (column < startColumn) continue;
+          if (is(token, "end-tag-open")) {
+            token = tokens[i + 1];
+            if (token && token.value == tagName) return true;
+          }
+        }
+        return false;
+      };
+      this._readTagForward = function(iterator) {
+        var token = iterator.getCurrentToken();
+        if (!token) return null;
+
+        var tag = new Tag();
+        do {
+          if (is(token, "tag-open")) {
+            tag.closing = is(token, "end-tag-open");
+            tag.start.row = iterator.getCurrentTokenRow();
+            tag.start.column = iterator.getCurrentTokenColumn();
+          } else if (is(token, "tag-name")) {
+            tag.tagName = token.value;
+          } else if (is(token, "tag-close")) {
+            tag.selfClosing = token.value == "/>";
+            tag.end.row = iterator.getCurrentTokenRow();
+            tag.end.column =
+              iterator.getCurrentTokenColumn() + token.value.length;
+            iterator.stepForward();
+            return tag;
+          }
+        } while ((token = iterator.stepForward()));
+
+        return null;
+      };
+
+      this._readTagBackward = function(iterator) {
+        var token = iterator.getCurrentToken();
+        if (!token) return null;
+
+        var tag = new Tag();
+        do {
+          if (is(token, "tag-open")) {
+            tag.closing = is(token, "end-tag-open");
+            tag.start.row = iterator.getCurrentTokenRow();
+            tag.start.column = iterator.getCurrentTokenColumn();
+            iterator.stepBackward();
+            return tag;
+          } else if (is(token, "tag-name")) {
+            tag.tagName = token.value;
+          } else if (is(token, "tag-close")) {
+            tag.selfClosing = token.value == "/>";
+            tag.end.row = iterator.getCurrentTokenRow();
+            tag.end.column =
+              iterator.getCurrentTokenColumn() + token.value.length;
+          }
+        } while ((token = iterator.stepBackward()));
+
+        return null;
+      };
+
+      this._pop = function(stack, tag) {
+        while (stack.length) {
+          var top = stack[stack.length - 1];
+          if (!tag || top.tagName == tag.tagName) {
+            return stack.pop();
+          } else if (this.optionalEndTags.hasOwnProperty(top.tagName)) {
+            stack.pop();
+            continue;
+          } else {
+            return null;
+          }
+        }
+      };
+
+      this.getFoldWidgetRange = function(session, foldStyle, row) {
+        var firstTag = this._getFirstTagInLine(session, row);
+
+        if (!firstTag) {
+          return (
+            this.getCommentFoldWidget(session, row) &&
+            session.getCommentFoldRange(row, session.getLine(row).length)
+          );
+        }
+
+        var isBackward = firstTag.closing || firstTag.selfClosing;
+        var stack = [];
+        var tag;
+
+        if (!isBackward) {
+          var iterator = new TokenIterator(session, row, firstTag.start.column);
+          var start = {
+            row: row,
+            column: firstTag.start.column + firstTag.tagName.length + 2
+          };
+          if (firstTag.start.row == firstTag.end.row)
+            start.column = firstTag.end.column;
+          while ((tag = this._readTagForward(iterator))) {
+            if (tag.selfClosing) {
+              if (!stack.length) {
+                tag.start.column += tag.tagName.length + 2;
+                tag.end.column -= 2;
+                return Range.fromPoints(tag.start, tag.end);
+              } else continue;
+            }
+
+            if (tag.closing) {
+              this._pop(stack, tag);
+              if (stack.length == 0) return Range.fromPoints(start, tag.start);
+            } else {
+              stack.push(tag);
+            }
+          }
+        } else {
+          var iterator = new TokenIterator(session, row, firstTag.end.column);
+          var end = {
+            row: row,
+            column: firstTag.start.column
+          };
+
+          while ((tag = this._readTagBackward(iterator))) {
+            if (tag.selfClosing) {
+              if (!stack.length) {
+                tag.start.column += tag.tagName.length + 2;
+                tag.end.column -= 2;
+                return Range.fromPoints(tag.start, tag.end);
+              } else continue;
+            }
+
+            if (!tag.closing) {
+              this._pop(stack, tag);
+              if (stack.length == 0) {
+                tag.start.column += tag.tagName.length + 2;
+                if (
+                  tag.start.row == tag.end.row &&
+                  tag.start.column < tag.end.column
+                )
+                  tag.start.column = tag.end.column;
+                return Range.fromPoints(tag.start, end);
+              }
+            } else {
+              stack.push(tag);
+            }
+          }
+        }
+      };
+    }.call(FoldMode.prototype));
+  }
+);
+
+ace.define(
+  "ace/mode/xml",
+  [
+    "require",
+    "exports",
+    "module",
+    "ace/lib/oop",
+    "ace/lib/lang",
+    "ace/mode/text",
+    "ace/mode/xml_highlight_rules",
+    "ace/mode/behaviour/xml",
+    "ace/mode/folding/xml",
+    "ace/worker/worker_client"
+  ],
+  function(require, exports, module) {
+    "use strict";
+
+    var oop = require("../lib/oop");
+    var lang = require("../lib/lang");
+    var TextMode = require("./text").Mode;
+    var XmlHighlightRules = require("./xml_highlight_rules").XmlHighlightRules;
+    var XmlBehaviour = require("./behaviour/xml").XmlBehaviour;
+    var XmlFoldMode = require("./folding/xml").FoldMode;
+    var WorkerClient = require("../worker/worker_client").WorkerClient;
+
+    var Mode = function() {
+      this.HighlightRules = XmlHighlightRules;
+      this.$behaviour = new XmlBehaviour();
+      this.foldingRules = new XmlFoldMode();
+    };
+
+    oop.inherits(Mode, TextMode);
+
+    (function() {
+      this.voidElements = lang.arrayToMap([]);
+
+      this.blockComment = { start: "<!--", end: "-->" };
+
+      this.createWorker = function(session) {
+        var worker = new WorkerClient(["ace"], "ace/mode/xml_worker", "Worker");
+        worker.attachToDocument(session.getDocument());
+
+        worker.on("error", function(e) {
+          session.setAnnotations(e.data);
+        });
+
+        worker.on("terminate", function() {
+          session.clearAnnotations();
+        });
+
+        return worker;
+      };
+
+      this.$id = "ace/mode/xml";
+    }.call(Mode.prototype));
+
+    exports.Mode = Mode;
+  }
+);
+(function() {
+  ace.require(["ace/mode/xml"], function(m) {
+    if (typeof module == "object" && typeof exports == "object" && module) {
+      module.exports = m;
+    }
+  });
+})();

extras/playground/libs/theme-monokai.js

@@ -0,0 +1,116 @@
+ace.define(
+  "ace/theme/monokai",
+  ["require", "exports", "module", "ace/lib/dom"],
+  function(require, exports, module) {
+    exports.isDark = true;
+    exports.cssClass = "ace-monokai";
+    exports.cssText =
+      ".ace-monokai .ace_gutter {\
+background: #2F3129;\
+color: #8F908A\
+}\
+.ace-monokai .ace_print-margin {\
+width: 1px;\
+background: #555651\
+}\
+.ace-monokai {\
+background-color: #272822;\
+color: #F8F8F2\
+}\
+.ace-monokai .ace_cursor {\
+color: #F8F8F0\
+}\
+.ace-monokai .ace_marker-layer .ace_selection {\
+background: #49483E\
+}\
+.ace-monokai.ace_multiselect .ace_selection.ace_start {\
+box-shadow: 0 0 3px 0px #272822;\
+}\
+.ace-monokai .ace_marker-layer .ace_step {\
+background: rgb(102, 82, 0)\
+}\
+.ace-monokai .ace_marker-layer .ace_bracket {\
+margin: -1px 0 0 -1px;\
+border: 1px solid #49483E\
+}\
+.ace-monokai .ace_marker-layer .ace_active-line {\
+background: #202020\
+}\
+.ace-monokai .ace_gutter-active-line {\
+background-color: #272727\
+}\
+.ace-monokai .ace_marker-layer .ace_selected-word {\
+border: 1px solid #49483E\
+}\
+.ace-monokai .ace_invisible {\
+color: #52524d\
+}\
+.ace-monokai .ace_entity.ace_name.ace_tag,\
+.ace-monokai .ace_keyword,\
+.ace-monokai .ace_meta.ace_tag,\
+.ace-monokai .ace_storage {\
+color: #F92672\
+}\
+.ace-monokai .ace_punctuation,\
+.ace-monokai .ace_punctuation.ace_tag {\
+color: #fff\
+}\
+.ace-monokai .ace_constant.ace_character,\
+.ace-monokai .ace_constant.ace_language,\
+.ace-monokai .ace_constant.ace_numeric,\
+.ace-monokai .ace_constant.ace_other {\
+color: #AE81FF\
+}\
+.ace-monokai .ace_invalid {\
+color: #F8F8F0;\
+background-color: #F92672\
+}\
+.ace-monokai .ace_invalid.ace_deprecated {\
+color: #F8F8F0;\
+background-color: #AE81FF\
+}\
+.ace-monokai .ace_support.ace_constant,\
+.ace-monokai .ace_support.ace_function {\
+color: #66D9EF\
+}\
+.ace-monokai .ace_fold {\
+background-color: #A6E22E;\
+border-color: #F8F8F2\
+}\
+.ace-monokai .ace_storage.ace_type,\
+.ace-monokai .ace_support.ace_class,\
+.ace-monokai .ace_support.ace_type {\
+font-style: italic;\
+color: #66D9EF\
+}\
+.ace-monokai .ace_entity.ace_name.ace_function,\
+.ace-monokai .ace_entity.ace_other,\
+.ace-monokai .ace_entity.ace_other.ace_attribute-name,\
+.ace-monokai .ace_variable {\
+color: #A6E22E\
+}\
+.ace-monokai .ace_variable.ace_parameter {\
+font-style: italic;\
+color: #FD971F\
+}\
+.ace-monokai .ace_string {\
+color: #E6DB74\
+}\
+.ace-monokai .ace_comment {\
+color: #75715E\
+}\
+.ace-monokai .ace_indent-guide {\
+background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAACCAYAAACZgbYnAAAAEklEQVQImWPQ0FD0ZXBzd/wPAAjVAoxeSgNeAAAAAElFTkSuQmCC) right repeat-y\
+}";
+
+    var dom = require("../lib/dom");
+    dom.importCssString(exports.cssText, exports.cssClass);
+  }
+);
+(function() {
+  ace.require(["ace/theme/monokai"], function(m) {
+    if (typeof module == "object" && typeof exports == "object" && module) {
+      module.exports = m;
+    }
+  });
+})();

extras/playground/playground.css

@@ -0,0 +1,188 @@
+/* GENERIC STUFF  ****************************************/
+html,
+body {
+  height: 100%;
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
+    Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", Arial,
+    sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
+}
+
+body {
+  margin: 0;
+}
+
+.btn {
+  cursor: pointer;
+  padding: 5px;
+  margin: 5px;
+}
+
+/* APPLICATION ROOT ****************************************/
+.playground {
+  display: grid;
+  height: 100%;
+  width: 100%;
+  grid-template-columns: auto 8px 100%;
+}
+
+/* LEFT BAR ****************************************/
+.left-bar {
+  display: flex;
+  flex-direction: column;
+  background-color: #2f3129;
+}
+
+.left-bar.split {
+  grid-template-rows: 50px 60% 23px 30%;
+}
+
+.menubar {
+  background-color: #1c2128;
+  color: white;
+  font-size: 18px;
+  display: flex;
+  flex: 0 0 50px;
+  flex-direction: row-reverse;
+  align-items: center;
+  user-select: none;
+}
+
+.menubar select {
+  margin: 10px;
+  font-size: 16px;
+  height: 25px;
+}
+
+.run-code {
+  margin-right: 12px;
+  height: 25px;
+  border: 2px solid transparent;
+  opacity: 0.9;
+}
+
+.run-code:hover {
+  opacity: 1;
+}
+
+.flash {
+  background-position: center;
+  transition: background 0.5s;
+}
+
+.flash:active {
+  background-color: #41454a;
+  background-size: 100%;
+  transition: background 0s;
+}
+
+.layout-selector {
+  cursor: pointer;
+  padding: 5px;
+  margin: 5px;
+}
+
+/* TABBED EDITOR ****************************************/
+
+.tabbed-editor {
+  flex: 2 2 auto;
+  position: relative;
+}
+
+.separator.horizontal + .tabbed-editor {
+  flex: 1 1 auto;
+}
+
+.tabBar {
+  color: white;
+  height: 22px;
+  margin-top: -22px;
+  padding-left: 5px;
+  user-select: none;
+  width: 170px;
+}
+
+.tabBar.resizeable {
+  cursor: row-resize;
+  width: 100%;
+}
+
+.tab {
+  display: inline-block;
+  cursor: pointer;
+  padding: 0 8px;
+  font-size: 16px;
+  line-height: 20px;
+  width: 34px;
+  text-align: center;
+  border-bottom: 2px solid transparent;
+  text-transform: uppercase;
+}
+
+.tab.active {
+  border-bottom: 2px solid gray;
+}
+
+.code-editor {
+  margin-top: 8px;
+  height: calc(100% - 10px);
+}
+
+/* SEPARATOR ****************************************/
+
+.separator {
+  background-color: #1c2128;
+  cursor: col-resize;
+}
+
+.separator.horizontal {
+  height: 20px;
+}
+
+/* RIGHT PANE ****************************************/
+.right-pane {
+  background-color: bisque;
+  overflow: hidden;
+}
+
+.right-pane iframe {
+  background-color: white;
+  width: 100%;
+  height: 100%;
+  border: 0;
+}
+
+.right-pane iframe.disabled {
+  pointer-events: none;
+}
+
+.content {
+  height: 100%;
+}
+.right-pane .welcome {
+  text-align: center;
+  font-size: 30px;
+  color: gray;
+  margin-top: 50px;
+}
+
+.right-pane .url {
+  font-size: 20px;
+  margin-top: 20px;
+}
+
+.url a {
+  color: gray;
+}
+
+.right-pane .note {
+  font-size: 20px;
+  margin-top: 20px;
+}
+
+.right-pane .error {
+  height: 100%;
+  padding-top: 40%;
+  font-size: 30px;
+  color: darkred;
+  text-align: center;
+}

extras/playground/templates.xml

@@ -0,0 +1,54 @@
+<templates>
+  <div t-name="TabbedEditor" class="tabbed-editor">
+    <div class="tabBar" t-att-class="{resizeable: props.resizeable}" t-on-mousedown="onMouseDown">
+        <t t-foreach="['js', 'xml', 'css']" t-as="tab">
+            <a t-ref="{{tab}}" t-if="props[tab]" t-key="tab" class="tab flash" t-att-class="{active: state.currentTab===tab}" t-on-click="setTab(tab)">
+                <t t-esc="tab"/>
+            </a>
+        </t>
+    </div>
+    <div class="code-editor" t-ref="editor"></div>
+  </div>
+
+  <div t-name="App" class="playground">
+      <div class="left-bar" t-att-style="leftPaneStyle" t-att-class="{split: state.splitLayout}">
+        <div class="menubar">
+          <a class="btn run-code flash" t-on-click="runCode" title="Execute this Code">▶ Run</a>
+          <select t-on-change="setSample">
+            <option t-foreach="SAMPLES" t-as="sample" t-key="sample_index">
+              <t t-esc="sample.description"/>
+            </option>
+          </select>
+          <a class="btn flash" t-on-click="downloadCode" title="Download a Zip with this Code"><i class="fas fa-download"></i></a>
+          <a class="layout-selector flash" t-on-click="toggleLayout" title="Toggle Layout"><i class="fas"  t-att-class="state.splitLayout ?  'fa-toggle-on' : 'fa-toggle-off'"></i></a>
+        </div>
+        <t t-if="state.splitLayout">
+          <t t-widget="TabbedEditor"
+             t-props="{js:state.js, css:false, xml: false}"
+             t-on-updateCode="updateCode"
+             t-att-style="topEditorStyle"/>
+          <div class="separator horizontal"/>
+          <t t-widget="TabbedEditor" t-keepalive="1"
+             t-props="{js:false, css:state.css, xml: state.xml, resizeable: true}"
+             t-on-updateCode="updateCode"
+             t-on-updatePanelHeight="updatePanelHeight"/>
+        </t>
+        <t t-else="1">
+          <t t-widget="TabbedEditor" t-props="{js:state.js, css:state.css, xml: state.xml, display: 'js|xml|css'}" t-on-updateCode="updateCode"/>
+        </t>
+      </div>
+      <div class="separator vertical" t-on-mousedown="onMouseDown"/>
+      <div class="right-pane"  t-att-style="rightPaneStyle">
+        <div class="welcome" t-if="state.displayWelcome">
+          <div>🦉 Odoo Web Library 🦉</div>
+          <div>v<t t-esc="version"/></div>
+          <div class="url"><a href="https://github.com/odoo/owl">https://github.com/odoo/owl</a></div>
+          <div class="note">Note: these examples require a recent browser to work without a transpilation step. </div>
+        </div>
+        <div t-if="state.error" class="error">
+          <t t-esc="state.error"/>
+        </div>
+        <div class="content" t-ref="content"/>
+      </div>
+  </div>
+</templates>

extras/readme.md

@@ -0,0 +1,21 @@
+# 🦉 Extra Stuff 🦉
+
+To help work/improve/learn with OWL, we have here:
+
+- a benchmarks application
+- a playground application
+
+Both of them can be accessed by using a static http server.  A simple python
+server is available in `server.py`.  There is also a npm script to start it:
+`npm run extras` (and its version with a watcher: `npm run extras:watch`).
+
+## Benchmarks
+
+The benchmarks application is a very small application, implemented in different
+frameworks, and in different versions of Owl.  This is a simple internal tool,
+useful to compare various performance metrics on some tasks.
+
+## Playground
+
+The playground is an important application designed to help learning and
+experimenting with Owl.  It is available [online](https://odoo.github.io/owl/playground/).

extras/server.py

@@ -0,0 +1,38 @@
+import sys
+import thread
+import webbrowser
+import time
+
+import BaseHTTPServer
+import SimpleHTTPServer
+
+HOST = '127.0.0.1'
+PORT = 8000
+URL = 'http://{0}:{1}/extras'.format(HOST, PORT)
+
+
+# We define our own handler here to remap owl.js GET requests to the Owl build
+# in dist/.  This is useful for the benchmarks and playground applications.
+# With this, we can simply copy the playground folder as is in the gh-page when
+# we want to update the playground.
+class OWLHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
+    def do_GET(self):
+        if self.path == '/extras/owl.js':
+            self.path = '/dist/owl.js'
+        return SimpleHTTPServer.SimpleHTTPRequestHandler.do_GET(self)
+
+
+def start_server():
+    httpd = BaseHTTPServer.HTTPServer((HOST, PORT), OWLHandler)
+    httpd.serve_forever()
+
+
+if __name__ == "__main__":
+    thread.start_new_thread(start_server, ())
+    webbrowser.open_new(URL)
+
+    while True:
+        try:
+            time.sleep(1)
+        except KeyboardInterrupt:
+            sys.exit(0)

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);
-    }
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