[REL] v1.0.12

# Owl v1.0.12

## Bug fixes

- fix: properly handle named t-slots inside named t-slots
- fix: do not render comments as text in t-raw
- fix: allow dynamic template in t-call
- fix: correctly handle top-level t-call with body
- fix: correct cause of non determinism in tests

## Tooling improvements

- setup github actions for CI
- improve owl bundling pipeline
- add  flag in owl configuration
- add prettier to github CI

.github/workflows/deploy.yml

@@ -0,0 +1,27 @@
+# This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
+
+name: Node.js CI
+
+on:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x, 14.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm run test
+    - run: npm run prettier

.gitignore

@@ -26,4 +26,6 @@ node_modules
 # Extras temp file
 /tools/owl.js
 
-release-notes.md
+release-notes.md
+
+.rpt2_cache

README.md

@@ -121,8 +121,7 @@ npm install @odoo/owl
 
 If you want to use a simple `<script>` tag, the last release can be downloaded here:
 
-- [owl-1.0.5.js](https://github.com/odoo/owl/releases/download/v1.0.5/owl.js)
-- [owl-1.0.5.min.js](https://github.com/odoo/owl/releases/download/v1.0.5/owl.min.js)
+- [owl-1.0.12](https://github.com/odoo/owl/releases/tag/v1.0.12)
 
 ## License
 

doc/learning/overview.md

@@ -111,7 +111,7 @@ class Parent extends Component {
   static components = { OrderLine };
   orders = useState([
     { id: 1, name: "Coffee", quantity: 0 },
-    { id: 2, name: "Tea", quantity: 0 }
+    { id: 2, name: "Tea", quantity: 0 },
   ]);
 
   addToOrder(event) {

doc/learning/quick_start.md

@@ -281,7 +281,7 @@ import { Component } from "@odoo/owl";
 import "regenerator-runtime/runtime";
 
 export async function nextTick() {
-  return new Promise(function(resolve) {
+  return new Promise(function (resolve) {
     setTimeout(() => Component.scheduler.requestAnimationFrame(() => resolve()));
   });
 }
@@ -361,26 +361,26 @@ const HtmlWebpackPlugin = require("html-webpack-plugin");
 
 const host = process.env.HOST || "localhost";
 
-module.exports = function(env, argv) {
+module.exports = function (env, argv) {
   const mode = argv.mode || "development";
   return {
     mode: mode,
     entry: "./src/main.js",
     output: {
       filename: "main.js",
-      path: path.resolve(__dirname, "dist")
+      path: path.resolve(__dirname, "dist"),
     },
     module: {
       rules: [
         {
           test: /\.jsx?$/,
           loader: "babel-loader",
-          exclude: /node_modules/
-        }
-      ]
+          exclude: /node_modules/,
+        },
+      ],
     },
     resolve: {
-      extensions: [".js", ".jsx"]
+      extensions: [".js", ".jsx"],
     },
     devServer: {
       contentBase: path.resolve(__dirname, "public/index.html"),
@@ -388,14 +388,14 @@ module.exports = function(env, argv) {
       hot: true,
       host,
       port: 3000,
-      publicPath: "/"
+      publicPath: "/",
     },
     plugins: [
       new HtmlWebpackPlugin({
         inject: true,
-        template: path.resolve(__dirname, "public/index.html")
-      })
-    ]
+        template: path.resolve(__dirname, "public/index.html"),
+      }),
+    ],
   };
 };
 ```

doc/learning/tutorial_todoapp.md

@@ -62,7 +62,7 @@ our application. `app.js` is where we will write all our code. For now, let's
 just put the following code:
 
 ```js
-(function() {
+(function () {
   console.log("hello owl", owl.__info__.version);
 })();
 ```
@@ -170,13 +170,13 @@ class App extends Component {
     {
       id: 1,
       title: "buy milk",
-      isCompleted: true
+      isCompleted: true,
     },
     {
       id: 2,
       title: "clean house",
-      isCompleted: false
-    }
+      isCompleted: false,
+    },
   ];
 }
 ```
@@ -562,23 +562,23 @@ const actions = {
       const task = {
         id: state.nextId++,
         title: title,
-        isCompleted: false
+        isCompleted: false,
       };
       state.tasks.push(task);
     }
   },
   toggleTask({ state }, id) {
-    const task = state.tasks.find(t => t.id === id);
+    const task = state.tasks.find((t) => t.id === id);
     task.isCompleted = !task.isCompleted;
   },
   deleteTask({ state }, id) {
-    const index = state.tasks.findIndex(t => t.id === id);
+    const index = state.tasks.findIndex((t) => t.id === id);
     state.tasks.splice(index, 1);
-  }
+  },
 };
 const initialState = {
   nextId: 1,
-  tasks: []
+  tasks: [],
 };
 
 // -------------------------------------------------------------------------
@@ -616,7 +616,7 @@ class App extends Component {
   static components = { Task };
 
   inputRef = useRef("add-input");
-  tasks = useStore(state => state.tasks);
+  tasks = useStore((state) => state.tasks);
   dispatch = useDispatch();
 
   mounted() {
@@ -811,7 +811,7 @@ For reference, here is the final code:
 ```
 
 ```js
-(function() {
+(function () {
   const { Component, Store } = owl;
   const { xml } = owl.tags;
   const { whenReady } = owl.utils;
@@ -827,24 +827,24 @@ For reference, here is the final code:
         const task = {
           id: state.nextId++,
           title: title,
-          isCompleted: false
+          isCompleted: false,
         };
         state.tasks.push(task);
       }
     },
     toggleTask({ state }, id) {
-      const task = state.tasks.find(t => t.id === id);
+      const task = state.tasks.find((t) => t.id === id);
       task.isCompleted = !task.isCompleted;
     },
     deleteTask({ state }, id) {
-      const index = state.tasks.findIndex(t => t.id === id);
+      const index = state.tasks.findIndex((t) => t.id === id);
       state.tasks.splice(index, 1);
-    }
+    },
   };
 
   const initialState = {
     nextId: 1,
-    tasks: []
+    tasks: [],
   };
 
   // -------------------------------------------------------------------------
@@ -897,7 +897,7 @@ For reference, here is the final code:
     static components = { Task };
 
     inputRef = useRef("add-input");
-    tasks = useStore(state => state.tasks);
+    tasks = useStore((state) => state.tasks);
     filter = useState({ value: "all" });
     dispatch = useDispatch();
 
@@ -916,9 +916,9 @@ For reference, here is the final code:
     get displayedTasks() {
       switch (this.filter.value) {
         case "active":
-          return this.tasks.filter(t => !t.isCompleted);
+          return this.tasks.filter((t) => !t.isCompleted);
         case "completed":
-          return this.tasks.filter(t => t.isCompleted);
+          return this.tasks.filter((t) => t.isCompleted);
         case "all":
           return this.tasks;
       }

doc/miscellaneous/comparison.md

@@ -257,11 +257,11 @@ to the store like in redux, with the `useStore` hook (see the [store documentati
 const actions = {
   increment({ state }, val) {
     state.counter.value += val;
-  }
+  },
 };
 
 const state = {
-  counter: { value: 0 }
+  counter: { value: 0 },
 };
 const store = new owl.Store({ state, actions });
 
@@ -270,7 +270,7 @@ class Counter extends Component {
       <button t-name="Counter" t-on-click="dispatch('increment')">
         Click Me! [<t t-esc="counter.value"/>]
       </button>`;
-  counter = useStore(state => state.counter);
+  counter = useStore((state) => state.counter);
   dispatch = useDispatch();
 }
 

doc/reference/component.md

@@ -204,7 +204,7 @@ to be called in the constructor.
   class Counter extends owl.Component {
     static props = {
       initialValue: Number,
-      optional: true
+      optional: true,
     };
   }
   ```
@@ -217,7 +217,7 @@ to be called in the constructor.
   ```js
   class Counter extends owl.Component {
     static defaultProps = {
-      initialValue: 0
+      initialValue: 0,
     };
   }
   ```
@@ -804,8 +804,8 @@ class RootNode extends Component {
     children: [
       { label: "b" },
       { label: "c", children: [{ label: "d" }, { label: "e" }] },
-      { label: "f", children: [{ label: "g" }] }
-    ]
+      { label: "f", children: [{ label: "g" }] },
+    ],
   };
 }
 ```

doc/reference/config.md

@@ -2,9 +2,10 @@
 
 The Owl framework is designed to work in many situations. However, it is
 sometimes necessary to customize some behaviour. This is done by using the
-global `config` object. It currently has one key:
+global `config` object. It provides two settings:
 
-- [`mode`](#mode).
+- [`mode`](#mode) (default value: `prod`),
+- [`enableTransitions`](#enabletransitions) (default value: `true`).
 
 ## Mode
 
@@ -25,3 +26,19 @@ So, changing this setting is best done at startup.
 
 An important job done by the `dev` mode is to validate props for each component
 creation and update. Also, extra props will cause an error.
+
+## `enableTransitions`
+
+Transitions are usually nice, but they can cause issues in some specific cases,
+such as automated tests. It is uncomfortable having to wait for a transition
+to end before moving to the next step.
+
+To solve this issue, Owl can be configured to ignore the `t-transition` directive.
+To do that, one only needs to set the `enableTransitions` flag to false:
+
+```js
+owl.config.enableTransitions = false;
+```
+
+Note that it suffers from the same drawback as the "dev" mode: all compiled
+templates, if any, will keep their current behaviours.

doc/reference/environment.md

@@ -6,6 +6,7 @@
 - [Setting an Environment](#setting-an-environment)
 - [Using a sub environment](#using-a-sub-environment)
 - [Content of an Environment](#content-of-an-environment)
+- [Special keys](#special-keys)
 
 ## Overview
 
@@ -93,7 +94,7 @@ Some good use cases for additional keys in the environment are:
 
 - some configuration keys,
 - session information,
-- generic services (such as doing rpcs, or accessing local storage).
+- generic services (such as doing rpcs).
 
 Doing it this way means that components are easily testable: we can simply
 create a test environment with mock services.
@@ -112,10 +113,10 @@ async function myEnv() {
     qweb: qweb,
     services: {
       localStorage: localStorage,
-      rpc: rpc
+      rpc: rpc,
     },
     debug: false,
-    inMobileMode: true
+    inMobileMode: true,
   };
 }
 
@@ -125,3 +126,26 @@ async function start() {
   await app.mount(document.body);
 }
 ```
+
+## Special Keys
+
+There are two special key/value added by Owl if not provided in the environment:
+the `QWeb` instance and a `browser` object:
+
+- `qweb` will be set to an empty `QWeb` instance. This is absolutely necessary
+  for Owl to be able to render anything
+- `browser`: this is an object that contains some common access points to the
+  browser methods with a side effect. This is particularly useful when one want
+  to test more advanced components, and be able to mock those methods.
+
+More specifically, the `browser` object contains the following methods and objects:
+
+- `setTimeout`
+- `clearTimeout`
+- `setInterval`
+- `clearInterval`
+- `requestAnimationFrame`
+- `random`
+- `Date`
+- `fetch`
+- `localStorage`

doc/reference/error_handling.md

@@ -74,7 +74,7 @@ broadcasted to the application by an event on the `qweb` instance. It may be
 useful, for example, to log the error somewhere.
 
 ```js
-env.qweb.on("error", null, function(error) {
+env.qweb.on("error", null, function (error) {
   // do something
   // react to the error
 });

doc/reference/event_bus.md

@@ -7,7 +7,7 @@ triggering events, and callbacks.
 ```js
 const bus = new owl.core.EventBus();
 
-bus.on("some-event", null, function(...args) {
+bus.on("some-event", null, function (...args) {
   console.log(...args);
 });
 

doc/reference/event_handling.md

@@ -78,6 +78,20 @@ The `t-on` directive allows to prebind its arguments. For example,
 Here, `expr` is a valid Owl expression, so it could be `true` or some variable
 from the rendering context.
 
+### Type Hinting
+
+Note that if you work with Typescript, the `trigger` method is generic on the type of the payload.
+
+You can then describe the type of the event, so you will see typing errors...
+
+```typescript
+this.trigger<MyCustomPayload>("my-custom-event", payload);
+```
+
+```typescript
+myCustomEventHandler(ev: OwlEvent<MyCustomPayload>) { ... }
+```
+
 ## Inline Event Handlers
 
 One can also directly specify inline statements. For example,

doc/reference/hooks.md

@@ -259,7 +259,7 @@ function useLoader() {
   }
 
   onWillStart(() => updateRecord(component.props.id));
-  onWillUpdateProps(nextProps => updateRecord(nextProps.id));
+  onWillUpdateProps((nextProps) => updateRecord(nextProps.id));
 
   return record;
 }

doc/reference/props_validation.md

@@ -30,7 +30,7 @@ class ComponentB extends owl.Component {
     count: {type: Number},
     messages: {
       type: Array,
-      element: {type: Object, shape: {id: Boolean, text: 'string' }
+      element: {type: Object, shape: {id: Boolean, text: String }
     },
    date: Date,
    combinedVal: [Number, Boolean]

doc/reference/qweb_engine.md

@@ -114,9 +114,9 @@ For example:
 const translations = {
   hello: "bonjour",
   yes: "oui",
-  no: "non"
+  no: "non",
 };
-const translateFn = str => translations[str] || str;
+const translateFn = (str) => translations[str] || str;
 
 const qweb = new QWeb({ translateFn });
 ```

doc/reference/qweb_templating_language.md

@@ -15,6 +15,7 @@
   - [Dynamic Attributes](#dynamic-attributes)
   - [Loops](#loops)
   - [Rendering Sub Templates](#rendering-sub-templates)
+  - [Dynamic Sub Templates](#dynamic-sub-templates)
   - [Translations](#translations)
   - [Debugging](#debugging)
 
@@ -452,6 +453,17 @@ are all equivalent:
 
 If there is no `t-key` directive, Owl will use the index as a default key.
 
+Note: the `t-foreach` directive only accepts arrays (lists) or objects. It does
+not work with other iterables, such as `Set`. However, it is only a matter of
+using the `...` javascript operator. For example:
+
+```xml
+<t t-foreach="...items" t-as="item">...</t>
+```
+
+The `...` operator will convert the `Set` (or any other iterables) into a list,
+which will work with Owl QWeb.
+
 ### Rendering Sub Templates
 
 QWeb templates can be used for top level rendering, but they can also be used
@@ -509,6 +521,22 @@ This can be used to define variables scoped to a sub template:
 <!-- "var" does not exist here -->
 ```
 
+### Dynamic sub templates
+
+The `t-call` directive can also be used to dynamically call a sub template,
+using string interpolation. For example:
+
+```xml
+<div t-name="main-template">
+    <t t-call="{{template}}">
+        <em>content</em>
+    </t>
+</div>
+```
+
+Here, the name of the template is obtained from the `template` value in the
+template rendering context.
+
 ### Translations
 
 By default, QWeb specify that templates should be translated. If this behaviour
@@ -532,7 +560,7 @@ The javascript QWeb implementation provides two useful debugging directives:
 
 ```xml
 <t t-if="a_test">
-    <t t-debug="">
+    <t t-debug=""/>
 </t>
 ```
 

doc/reference/slots.md

@@ -37,16 +37,16 @@ rendering context.
 </div>
 ```
 
-Slots are defined by the caller, with the `t-set` directive:
+Slots are defined by the caller, with the `t-set-slot` directive:
 
 ```xml
 <div t-name="SomeComponent">
   <div>some component</div>
   <Dialog title="Some Dialog">
-    <t t-set="content">
+    <t t-set-slot="content">
       <div>hey</div>
     </t>
-    <t t-set="footer">
+    <t t-set-slot="footer">
       <button t-on-click="doSomething">ok</button>
     </t>
   </Dialog>
@@ -57,6 +57,9 @@ In this example, the component `Dialog` will render the slots `content` and `foo
 with its parent as rendering context. This means that clicking on the button
 will execute the `doSomething` method on the parent, not on the dialog.
 
+Note: Owl previously used the `t-set` directive to define the content of a slot.
+This is deprecated and should no longer be used in new code.
+
 ## Reference
 
 Default slot: the first element inside the component which is not a named slot will

doc/reference/store.md

@@ -40,14 +40,14 @@ const actions = {
     state.todos.push({
       id: state.nextId++,
       message,
-      isCompleted: false
+      isCompleted: false,
     });
-  }
+  },
 };
 
 const state = {
   todos: [],
-  nextId: 1
+  nextId: 1,
 };
 
 const store = new owl.Store({ state, actions });
@@ -90,7 +90,7 @@ const config = {
   state,
   actions,
   getters,
-  env
+  env,
 };
 const store = new Store(config);
 ```
@@ -110,7 +110,7 @@ const actions = {
     } catch (e) {
       state.loginState = "error";
     }
-  }
+  },
 };
 ```
 
@@ -144,7 +144,7 @@ const actions = {
     state.recordId = recordId;
     const data = await doSomeRPC("/read/", recordId);
     state.recordData = data;
-  }
+  },
 };
 ```
 
@@ -159,7 +159,7 @@ const actions = {
     const data = await doSomeRPC("/read/", recordId);
     state.recordId = recordId;
     state.recordData = data;
-  }
+  },
 };
 ```
 
@@ -187,14 +187,14 @@ 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);
+    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
+      content: post.content,
     };
-  }
+  },
 };
 
 // somewhere else
@@ -224,11 +224,11 @@ Assume we have this store:
 const actions = {
   increment({ state }, val) {
     state.counter.value += val;
-  }
+  },
 };
 
 const state = {
-  counter: { value: 0 }
+  counter: { value: 0 },
 };
 const store = new owl.Store({ state, actions });
 ```
@@ -245,7 +245,7 @@ A counter component can then select this value and dispatch an action like this:
 
 ```js
 class Counter extends Component {
-  counter = useStore(state => state.counter);
+  counter = useStore((state) => state.counter);
   dispatch = useDispatch();
 }
 

doc/reference/utils.md

@@ -19,7 +19,7 @@ not ready yet, resolved directly otherwise). If called with a callback as
 argument, it executes it as soon as the DOM ready (or directly).
 
 ```js
-Promise.all([loadFile("templates.xml"), owl.utils.whenReady()]).then(function([templates]) {
+Promise.all([loadFile("templates.xml"), owl.utils.whenReady()]).then(function ([templates]) {
   const qweb = new owl.QWeb({ templates });
   const app = new App({ qweb });
   app.mount(document.body);
@@ -29,7 +29,7 @@ Promise.all([loadFile("templates.xml"), owl.utils.whenReady()]).then(function([t
 or alternatively:
 
 ```js
-owl.utils.whenReady(function() {
+owl.utils.whenReady(function () {
   const qweb = new owl.QWeb();
   const app = new App({ qweb });
   app.mount(document.body);

package.json

@@ -1,22 +1,20 @@
 {
   "name": "@odoo/owl",
-  "version": "1.0.5",
+  "version": "1.0.12",
   "description": "Odoo Web Library (OWL)",
-  "main": "dist/owl.js",
+  "main": "dist/owl.cjs.js",
+  "browser": "dist/owl.iife.js",
+  "module": "dist/owl.es.js",
   "types": "dist/types/index.d.ts",
   "files": [
-    "dist/types/",
-    "dist/owl.js"
+    "dist"
   ],
   "engines": {
     "node": ">=10.15.3"
   },
   "scripts": {
-    "build:js": "tsc --target esnext --module es6 --outDir dist/owl",
     "build:bundle": "rollup -c",
-    "build": "npm run build:js && npm run build:bundle",
-    "buildcommonjs": "npm run build:js && npm run build:bundle -- -f cjs",
-    "minify": "uglifyjs dist/owl.js -o dist/owl.min.js --compress --mangle",
+    "build": "npm run build:bundle",
     "test": "jest",
     "test:watch": "jest --watch",
     "tools:serve": "python3 tools/server.py || python tools/server.py",
@@ -24,7 +22,7 @@
     "pretools:watch": "npm run build",
     "tools:watch": "npm-run-all  --parallel tools:serve \"build:* -- --watch\"",
     "prettier": "prettier {src/*.ts,src/**/*.ts,tests/*.ts,tests/**/*.ts,doc/*.md,doc/**/*.md} --write",
-    "publish": "npm run buildcommonjs && npm publish",
+    "publish": "npm run build && npm publish",
     "release": "node tools/release.js"
   },
   "repository": {
@@ -37,9 +35,9 @@
     "url": "https://github.com/odoo/owl/issues"
   },
   "homepage": "https://github.com/odoo/owl#readme",
-  "dependencies": {},
   "devDependencies": {
-    "@types/jest": "^23.3.12",
+    "@types/jest": "^23.3.14",
+    "@types/node": "^14.11.8",
     "chalk": "^3.0.0",
     "cpx": "^1.5.0",
     "git-rev-sync": "^1.12.0",
@@ -48,9 +46,10 @@
     "jest-environment-jsdom": "^24.7.1",
     "live-server": "^1.2.1",
     "npm-run-all": "^4.1.5",
-    "prettier": "^1.19.1",
+    "prettier": "^2.0.4",
     "rollup": "^1.6.0",
-    "rollup-plugin-typescript2": "^0.20.1",
+    "rollup-plugin-terser": "^7.0.2",
+    "rollup-plugin-typescript2": "^0.27.3",
     "sass": "^1.16.1",
     "source-map-support": "^0.5.10",
     "ts-jest": "^23.10.5",
@@ -77,6 +76,7 @@
     ]
   },
   "prettier": {
-    "printWidth": 100
+    "printWidth": 100,
+    "endOfLine": "auto"
   }
 }

roadmap.md

@@ -1,6 +1,6 @@
 # 🦉 OWL Roadmap 🦉
 
-- Current version: 1.0.5
+- Current version: 1.0.12
 - Status: stable
 
 This roadmap is only an attempt at predicting Owl's future.  Everything may
@@ -16,6 +16,8 @@ change!
 
 ### 2.x (2020? 2021? 2022?)
 
+- stop support for `t-set` directive to define the content of a slot
+
 Maybe:
 
 - reimplement vdom to use *block* system, like Vue 3, which should make Owl

rollup.config.js

@@ -1,14 +1,69 @@
-import { version } from "./package.json";
+import pkg from "./package.json";
 import git from "git-rev-sync";
+import typescript from 'rollup-plugin-typescript2';
+import { terser } from "rollup-plugin-terser";
 
-// rollup.config.js
-export default {
-  input: "dist/owl/index.js",
-  output: {
-    file: "dist/owl.js",
-    format: "iife",
-    name: "owl",
-    extend: true,
-    outro: `exports.__info__.version = '${version}';\nexports.__info__.date = '${new Date().toISOString()}';\nexports.__info__.hash = '${git.short()}';\nexports.__info__.url = 'https://github.com/odoo/owl';`
+const name = "owl"
+const extend = true
+
+/**
+ * Meta data to be added on the __info__ object. 
+ * Used to let external tools know the current owl version.
+ */
+const outro =  `
+__info__.version = '${pkg.version}';
+__info__.date = '${new Date().toISOString()}';
+__info__.hash = '${git.short()}';
+__info__.url = 'https://github.com/odoo/owl';
+`
+
+/**
+ * Generate from a string depicting a path a new path for the minified version.
+ * @param {string} pkgFileName file name 
+ */
+function generateMinifiedNameFromPkgName(pkgFileName) {
+  const parts = pkgFileName.split('.')
+  parts.splice(parts.length - 1, 0, "min");
+  return parts.join('.');
+}
+
+/**
+ * Get the rollup config based on the arguments
+ * @param {string} format format of the bundle
+ * @param {string} generatedFileName generated file name
+ * @param {boolean} minified should it be minified
+ */
+function getConfigForFormat(format, generatedFileName, minified = false) {
+  return {
+    file: minified ? generateMinifiedNameFromPkgName(generatedFileName) : generatedFileName,
+    format: format,
+    name: name,
+    extend: extend,
+    outro: outro,
+    plugins: minified ? [terser()] : []
   }
+}
+
+export default {
+  input: "src/index.ts",
+  output: [
+
+    /**
+     * Read about module formats:
+     *  https://auth0.com/blog/javascript-module-systems-showdown/
+     *  https://medium.com/@kelin2025/so-you-wanna-use-es6-modules-714f48b3a953
+     */
+
+    getConfigForFormat('esm', pkg.module),
+    getConfigForFormat('esm', pkg.module, true),
+    getConfigForFormat('cjs', pkg.main),
+    getConfigForFormat('cjs', pkg.main, true),
+    getConfigForFormat('iife', pkg.browser),
+    getConfigForFormat('iife', pkg.browser, true),
+  ],
+  plugins: [
+    typescript({
+      useTsconfigDeclarationDir: true
+    }),
+  ]
 };

src/browser.ts

@@ -0,0 +1,23 @@
+export interface Browser {
+  setTimeout: Window["setTimeout"];
+  clearTimeout: Window["clearTimeout"];
+  setInterval: Window["setInterval"];
+  clearInterval: Window["clearInterval"];
+  requestAnimationFrame: Window["requestAnimationFrame"];
+  random: Math["random"];
+  Date: typeof Date;
+  fetch: Window["fetch"];
+  localStorage: Window["localStorage"];
+}
+
+export const browser: Browser = {
+  setTimeout: window.setTimeout.bind(window),
+  clearTimeout: window.clearTimeout.bind(window),
+  setInterval: window.setInterval.bind(window),
+  clearInterval: window.clearInterval.bind(window),
+  requestAnimationFrame: window.requestAnimationFrame.bind(window),
+  random: Math.random,
+  Date: window.Date,
+  fetch: (window.fetch || (() => {})).bind(window),
+  localStorage: window.localStorage,
+};

src/component/component.ts

@@ -7,6 +7,7 @@ import { Fiber } from "./fiber";
 import "./props_validation";
 import { Scheduler, scheduler } from "./scheduler";
 import { activateSheet } from "./styles";
+import { Browser, browser } from "../browser";
 
 /**
  * Owl Component System
@@ -34,7 +35,7 @@ import { activateSheet } from "./styles";
  */
 export interface Env {
   qweb: QWeb;
-  [key: string]: any;
+  browser: Browser;
 }
 
 export type MountPosition = "first-child" | "last-child" | "self";
@@ -158,6 +159,9 @@ export class Component<Props extends {} = any, T extends Env = Env> {
       if (!this.env.qweb) {
         this.env.qweb = new QWeb();
       }
+      if (!this.env.browser) {
+        this.env.browser = browser;
+      }
       this.env.qweb.on("update", this, () => {
         if (this.__owl__.isMounted) {
           this.render(true);
@@ -199,7 +203,7 @@ export class Component<Props extends {} = any, T extends Env = Env> {
       renderFn: qweb.render.bind(qweb, template),
       classObj: null,
       refs: null,
-      scope: null
+      scope: null,
     };
     if (constr.style) {
       this.__applyStyles(constr);
@@ -312,6 +316,9 @@ export class Component<Props extends {} = any, T extends Env = Env> {
         return Promise.resolve();
       }
     }
+    if (__owl__.isDestroyed) {
+      throw new Error("Cannot mount a destroyed component");
+    }
     if (__owl__.currentFiber) {
       const currentFiber = __owl__.currentFiber;
       if (currentFiber.target === target && currentFiber.position === position) {
@@ -357,14 +364,15 @@ export class Component<Props extends {} = any, T extends Env = Env> {
    */
   async render(force: boolean = false): Promise<void> {
     const __owl__ = this.__owl__;
-    if (!__owl__.isMounted && !__owl__.currentFiber) {
+    const currentFiber = __owl__.currentFiber;
+    if (!__owl__.isMounted && !currentFiber) {
       // if we get here, this means that the component was either never mounted,
       // or was unmounted and some state change  triggered a render. Either way,
       // we do not want to actually render anything in this case.
       return;
     }
-    if (__owl__.currentFiber && !__owl__.currentFiber.isRendered) {
-      return scheduler.addFiber(__owl__.currentFiber.root);
+    if (currentFiber && !currentFiber.isRendered && !currentFiber.isCompleted) {
+      return scheduler.addFiber(currentFiber.root);
     }
     // if we aren't mounted at this point, it implies that there is a
     // currentFiber that is already rendered (isRendered is true), so we are
@@ -425,8 +433,8 @@ export class Component<Props extends {} = any, T extends Env = Env> {
    * up to the parent DOM nodes. Thus, it must be called between mounted() and
    * willUnmount().
    */
-  trigger(eventType: string, payload?: any) {
-    this.__trigger(this, eventType, payload);
+  trigger<T = any>(eventType: string, payload?: T) {
+    this.__trigger<T>(this, eventType, payload);
   }
 
   //--------------------------------------------------------------------------
@@ -488,9 +496,9 @@ export class Component<Props extends {} = any, T extends Env = Env> {
     }
     this.willUnmount();
     __owl__.isMounted = false;
-    if (this.__owl__.currentFiber) {
-      this.__owl__.currentFiber.isCompleted = true;
-      this.__owl__.currentFiber.root.counter = 0;
+    if (__owl__.currentFiber) {
+      __owl__.currentFiber.isCompleted = true;
+      __owl__.currentFiber.root.counter = 0;
     }
     const children = __owl__.children;
     for (let id in children) {
@@ -504,12 +512,12 @@ export class Component<Props extends {} = any, T extends Env = Env> {
    * Private trigger method, allows to choose the component which triggered
    * the event in the first place
    */
-  __trigger(component: Component, eventType: string, payload?: any) {
+  __trigger<T>(component: Component, eventType: string, payload?: T) {
     if (this.el) {
-      const ev = new OwlEvent(component, eventType, {
+      const ev = new OwlEvent<T>(component, eventType, {
         bubbles: true,
         cancelable: true,
-        detail: payload
+        detail: payload,
       });
       const triggerHook = this.env[portalSymbol as any];
       if (triggerHook) {
@@ -544,7 +552,7 @@ export class Component<Props extends {} = any, T extends Env = Env> {
       }
       await Promise.all([
         this.willUpdateProps(nextProps),
-        __owl__.willUpdatePropsCB && __owl__.willUpdatePropsCB(nextProps)
+        __owl__.willUpdatePropsCB && __owl__.willUpdatePropsCB(nextProps),
       ]);
       if (fiber.isCompleted) {
         return;
@@ -603,9 +611,10 @@ export class Component<Props extends {} = any, T extends Env = Env> {
       // key. So we fall back on looking for a template matching its name (or
       // one of its subclass).
 
-      let template: string;
-      while ((template = p.name) && !(template in qweb.templates) && p !== Component) {
+      let template: string = p.name;
+      while (!(template in qweb.templates) && p !== Component) {
         p = p.__proto__;
+        template = p.name;
       }
       if (p === Component) {
         throw new Error(`Could not find template for component "${this.constructor.name}"`);
@@ -640,16 +649,35 @@ export class Component<Props extends {} = any, T extends Env = Env> {
     try {
       let vnode = __owl__.renderFn!(this, {
         handlers: __owl__.boundHandlers,
-        fiber: fiber
+        fiber: fiber,
       });
       // we iterate over the children to detect those that no longer belong to the
       // current rendering: those ones, if not mounted yet, can (and have to) be
       // destroyed right now, because they are not in the DOM, and thus we won't
       // be notified later on (when patching), that they are removed from the DOM
       for (let childKey in __owl__.children) {
-        let child = __owl__.children[childKey];
-        if (!child.__owl__.isMounted && child.__owl__.parentLastFiberId < fiber.id) {
-          child.destroy();
+        const child = __owl__.children[childKey];
+        const childOwl = child.__owl__;
+        if (!childOwl.isMounted && childOwl.parentLastFiberId < fiber.id) {
+          // we only do here a "soft" destroy, meaning that we leave the child
+          // dom node alone, without removing it.  Most of the time, it does not
+          // matter, because the child component is already unmounted.  However,
+          // if some of its parent have been unmounted, the child could actually
+          // still be attached to its parent, and this may be important if we
+          // want to remount the parent, because the vdom need to match the
+          // actual DOM
+          child.__destroy(childOwl.parent);
+          if (childOwl.pvnode) {
+            // we remove the key here to make sure that the patching algorithm
+            // is able to make the difference between this pvnode and an eventual
+            // other instance of the same component
+            delete childOwl.pvnode.key;
+            // Since the component has been unmounted, we do not want to actually
+            // call a remove hook.  This is pretty important, since the t-component
+            // directive actually disabled it, so the vdom algorithm will just
+            // not remove the child elm if we don't remove the hook.
+            delete childOwl.pvnode.data!.hook!.remove;
+          }
         }
       }
       if (!vnode) {

src/component/directive.ts

@@ -7,7 +7,7 @@ import { makeHandlerCode, MODS_CODE } from "../qweb/extensions";
 //------------------------------------------------------------------------------
 
 const T_COMPONENT_MODS_CODE = Object.assign({}, MODS_CODE, {
-  self: "if (e.target !== vn.elm) {return}"
+  self: "if (e.target !== vn.elm) {return}",
 });
 
 QWeb.utils.defineProxy = function defineProxy(target, source) {
@@ -18,7 +18,7 @@ QWeb.utils.defineProxy = function defineProxy(target, source) {
       },
       set(val) {
         source[k] = val;
-      }
+      },
     });
   }
 };
@@ -227,7 +227,9 @@ QWeb.addDirective({
       if (name.startsWith("t-on-")) {
         events.push([name, value]);
       } else if (name === "t-transition") {
-        transition = value;
+        if (QWeb.enableTransitions) {
+          transition = value;
+        }
       } else if (!name.startsWith("t-")) {
         if (name !== "class" && name !== "style") {
           // this is a prop!
@@ -238,7 +240,7 @@ QWeb.addDirective({
 
     // computing the props string representing the props object
     let propStr = Object.keys(props)
-      .map(k => k + ":" + props[k])
+      .map((k) => k + ":" + props[k])
       .join(",");
     let componentID = ctx.generateID();
 
@@ -280,7 +282,7 @@ QWeb.addDirective({
         let classDef = classAttr
           .trim()
           .split(/\s+/)
-          .map(a => `'${a}':true`)
+          .map((a) => `'${a}':true`)
           .join(",");
         classObj = `_${ctx.generateID()}`;
         ctx.addLine(`let ${classObj} = {${classDef}};`);
@@ -298,7 +300,7 @@ QWeb.addDirective({
         }
       }
       let eventsCode = events
-        .map(function([name, value]) {
+        .map(function ([name, value]) {
           const capture = name.match(/\.capture/);
           name = capture ? name.replace(/\.capture/, "") : name;
           const { event, handler } = makeHandlerCode(
@@ -400,16 +402,53 @@ QWeb.addDirective({
 
     if (hasSlots) {
       const clone = <Element>node.cloneNode(true);
-      const slotNodes = clone.querySelectorAll("[t-set]");
+
+      // The next code is a fallback for compatibility reason. It accepts t-set
+      // elements that are direct children with a non empty body as nodes defining
+      // the content of a slot.
+      //
+      // This is wrong, but is necessary to prevent breaking all existing Owl
+      // code using slots. This will be removed in v2.0 someday. Meanwhile,
+      // please use t-set-slot everywhere you need to set the content of a
+      // slot.
+      for (let node of clone.children) {
+        if (node.hasAttribute("t-set") && node.hasChildNodes()) {
+          node.setAttribute("t-set-slot", node.getAttribute("t-set")!);
+          node.removeAttribute("t-set");
+        }
+      }
+      const slotNodes = Array.from(clone.querySelectorAll("[t-set-slot]"));
+      const slotNames = new Set<string>();
       const slotId = QWeb.nextSlotId++;
       ctx.addLine(`w${componentID}.__owl__.slotId = ${slotId};`);
       if (slotNodes.length) {
         for (let i = 0, length = slotNodes.length; i < length; i++) {
           const slotNode = slotNodes[i];
+          // check if this is defined in a sub component (in which case it should
+          // be ignored)
+          let el = slotNode.parentElement;
+          let isInSubComponent = false;
+          while (el !== clone) {
+            if (
+              el!.hasAttribute("t-component") ||
+              el!.tagName[0] === el!.tagName[0].toUpperCase()
+            ) {
+              isInSubComponent = true;
+              break;
+            }
+          }
+          if (isInSubComponent) {
+            continue;
+          }
+          let key = slotNode.getAttribute("t-set-slot")!;
+          if (slotNames.has(key)) {
+            continue;
+          }
+          slotNames.add(key);
+          slotNode.removeAttribute("t-set-slot");
           slotNode.parentElement!.removeChild(slotNode);
-          const key = slotNode.getAttribute("t-set")!;
-          slotNode.removeAttribute("t-set");
-          const slotFn = qweb._compile(`slot_${key}_template`, slotNode, ctx);
+
+          const slotFn = qweb._compile(`slot_${key}_template`, { elem: slotNode, hasParent: true });
           QWeb.slots[`${slotId}_${key}`] = slotFn;
         }
       }
@@ -418,7 +457,7 @@ QWeb.addDirective({
         for (let child of Object.values(clone.childNodes)) {
           t.appendChild(child);
         }
-        const slotFn = qweb._compile(`slot_default_template`, t, ctx);
+        const slotFn = qweb._compile(`slot_default_template`, { elem: t, hasParent: true });
         QWeb.slots[`${slotId}_default`] = slotFn;
       }
     }
@@ -448,5 +487,5 @@ QWeb.addDirective({
     ctx.addLine(`w${componentID}.__owl__.parentLastFiberId = extra.fiber.id;`);
 
     return true;
-  }
+  },
 });

src/component/fiber.ts

@@ -193,7 +193,7 @@ export class Fiber {
 
     // build patchQueue
     const patchQueue: Fiber[] = [];
-    const doWork: (Fiber) => Fiber | null = function(f) {
+    const doWork: (Fiber) => Fiber | null = function (f) {
       patchQueue.push(f);
       return f.child;
     };
@@ -225,6 +225,12 @@ export class Fiber {
               `Cannot attach '${component.constructor.name}' to target node (not same tag name)`
             );
           }
+          // In self mode, we *know* we are to take possession of the target
+          // Hence we manually create the corresponding VNode and copy the "key" in data
+          const selfVnodeData = fiber.vnode!.data ? { key: fiber.vnode!.data.key } : {};
+          const selfVnode = h(fiber.vnode!.sel, selfVnodeData);
+          selfVnode.elm = target;
+          target = selfVnode;
         } else {
           target = component.__owl__.vnode || document.createElement(fiber.vnode!.sel!);
         }
@@ -232,12 +238,20 @@ export class Fiber {
       } else {
         if (fiber.shouldPatch) {
           component.__patch(component.__owl__.vnode!, fiber.vnode!);
+          // When updating a Component's props (in directive),
+          // the component has a pvnode AND should be patched.
+          // However, its pvnode.elm may have changed if it is a High Order Component
+          if (component.__owl__.pvnode) {
+            component.__owl__.pvnode.elm = component.__owl__.vnode!.elm;
+          }
         } else {
           component.__patch(document.createElement(fiber.vnode!.sel!), fiber.vnode!);
           component.__owl__.pvnode!.elm = component.__owl__.vnode!.elm;
         }
       }
-      component.__owl__.currentFiber = null;
+      if (fiber === component.__owl__.currentFiber) {
+        component.__owl__.currentFiber = null;
+      }
     }
 
     // insert into the DOM (mount case)
@@ -274,7 +288,7 @@ export class Fiber {
    * Cancel a fiber and all its children.
    */
   cancel() {
-    this._walk(f => {
+    this._walk((f) => {
       if (!f.isRendered) {
         f.root.counter--;
       }

src/component/props_validation.ts

@@ -11,7 +11,7 @@ import { QWeb } from "../qweb/index";
  * This is why it is only done in 'dev' mode.
  */
 
-QWeb.utils.validateProps = function(Widget, props: Object) {
+QWeb.utils.validateProps = function (Widget, props: Object) {
   const propsDef = (<any>Widget).props;
   if (propsDef instanceof Array) {
     // list of strings (prop names)
@@ -37,7 +37,7 @@ QWeb.utils.validateProps = function(Widget, props: Object) {
         if (propsDef[propName] && !propsDef[propName].optional) {
           throw new Error(`Missing props '${propName}' (component '${Widget.name}')`);
         } else {
-          break;
+          continue;
         }
       }
       let isValid;

src/component/scheduler.ts

@@ -1,4 +1,5 @@
 import { Fiber } from "./fiber";
+import { browser } from "../browser";
 
 /**
  * Owl Scheduler Class
@@ -19,9 +20,9 @@ interface Task {
 export class Scheduler {
   tasks: Task[] = [];
   isRunning: boolean = false;
-  requestAnimationFrame: typeof window.requestAnimationFrame;
+  requestAnimationFrame: Window["requestAnimationFrame"];
 
-  constructor(requestAnimationFrame) {
+  constructor(requestAnimationFrame: Window["requestAnimationFrame"]) {
     this.requestAnimationFrame = requestAnimationFrame;
   }
 
@@ -49,7 +50,7 @@ export class Scheduler {
             return reject(fiber.error);
           }
           resolve();
-        }
+        },
       });
       if (!this.isRunning) {
         this.start();
@@ -59,7 +60,7 @@ export class Scheduler {
 
   rejectFiber(fiber: Fiber, reason: string) {
     fiber = fiber.root;
-    const index = this.tasks.findIndex(t => t.fiber === fiber);
+    const index = this.tasks.findIndex((t) => t.fiber === fiber);
     if (index >= 0) {
       const [task] = this.tasks.splice(index, 1);
       fiber.cancel();
@@ -75,7 +76,7 @@ export class Scheduler {
   flush() {
     let tasks = this.tasks;
     this.tasks = [];
-    tasks = tasks.filter(task => {
+    tasks = tasks.filter((task) => {
       if (task.fiber.isCompleted) {
         task.callback();
         return false;
@@ -109,5 +110,4 @@ export class Scheduler {
   }
 }
 
-const raf = window.requestAnimationFrame.bind(window);
-export const scheduler = new Scheduler(raf);
+export const scheduler = new Scheduler(browser.requestAnimationFrame);

src/component/styles.ts

@@ -8,7 +8,7 @@
 export const STYLESHEETS: { [id: string]: HTMLStyleElement } = {};
 
 export function processSheet(str: string): string {
-  const tokens = str.split(/(\{|\}|;)/).map(s => s.trim());
+  const tokens = str.split(/(\{|\}|;)/).map((s) => s.trim());
   const selectorStack: string[][] = [];
   const parts: string[] = [];
   let rules: string[] = [];

src/config.ts

@@ -8,6 +8,7 @@ import { QWeb } from "./qweb/index";
 
 interface Config {
   mode: string;
+  enableTransitions: boolean;
 }
 
 export const config = {} as Config;
@@ -26,5 +27,14 @@ Object.defineProperty(config, "mode", {
     } else {
       console.log(`Owl is now running in 'prod' mode.`);
     }
-  }
+  },
+});
+
+Object.defineProperty(config, "enableTransitions", {
+  get() {
+    return QWeb.enableTransitions;
+  },
+  set(value: boolean) {
+    QWeb.enableTransitions = value;
+  },
 });

src/context.ts

@@ -79,9 +79,9 @@ export class Context extends EventBus {
   async __notifyComponents() {
     const rev = ++this.rev;
     const subscriptions = this.subscriptions.update;
-    const groups = partitionBy(subscriptions, s => (s.owner ? s.owner.__owl__.depth : -1));
+    const groups = partitionBy(subscriptions, (s) => (s.owner ? s.owner.__owl__.depth : -1));
     for (let group of groups) {
-      const proms = group.map(sub => sub.callback.call(sub.owner, rev));
+      const proms = group.map((sub) => sub.callback.call(sub.owner, rev));
       // at this point, each component in the current group has registered a
       // top level fiber in the scheduler. It could happen that rendering these
       // components is done (if they have no children).  This is why we manually
@@ -116,7 +116,7 @@ export function useContextWithCB(ctx: Context, component: Component, method): an
     __owl__.observer.notifyCB = component.render.bind(component);
   }
   const currentCB = __owl__.observer.notifyCB;
-  __owl__.observer.notifyCB = function() {
+  __owl__.observer.notifyCB = function () {
     if (ctx.rev > mapping[id]) {
       // in this case, the context has been updated since we were rendering
       // last, and we do not need to render here with the observer. A
@@ -128,18 +128,18 @@ export function useContextWithCB(ctx: Context, component: Component, method): an
 
   mapping[id] = 0;
   const renderFn = __owl__.renderFn;
-  __owl__.renderFn = function(comp, params) {
+  __owl__.renderFn = function (comp, params) {
     mapping[id] = ctx.rev;
     return renderFn(comp, params);
   };
-  ctx.on("update", component, async contextRev => {
+  ctx.on("update", component, async (contextRev) => {
     if (mapping[id] < contextRev) {
       mapping[id] = contextRev;
       await method();
     }
   });
   const __destroy = component.__destroy;
-  component.__destroy = parent => {
+  component.__destroy = (parent) => {
     ctx.off("update", component);
     delete mapping[id];
     __destroy.call(component, parent);

src/core/event_bus.ts

@@ -44,7 +44,7 @@ export class EventBus {
     }
     this.subscriptions[eventType].push({
       owner,
-      callback
+      callback,
     });
   }
 
@@ -54,7 +54,7 @@ export class EventBus {
   off(eventType: string, owner: any) {
     const subs = this.subscriptions[eventType];
     if (subs) {
-      this.subscriptions[eventType] = subs.filter(s => s.owner !== owner);
+      this.subscriptions[eventType] = subs.filter((s) => s.owner !== owner);
     }
   }
 

src/core/observer.ts

@@ -25,7 +25,12 @@ export class Observer {
   notifyCB() {}
 
   observe<T>(value: T, parent?: any): T {
-    if (value === null || typeof value !== "object" || value instanceof Date) {
+    if (
+      value === null ||
+      typeof value !== "object" ||
+      value instanceof Date ||
+      value instanceof Promise
+    ) {
       // fun fact: typeof null === 'object'
       return value;
     }
@@ -67,14 +72,14 @@ export class Observer {
           self.notifyCB();
         }
         return true;
-      }
+      },
     });
 
     const metadata = {
       value,
       proxy,
       rev: this.rev,
-      parent
+      parent,
     };
 
     this.weakMap.set(value, metadata);

src/hooks.ts

@@ -36,11 +36,11 @@ export function useState<T>(state: T): T {
 // -----------------------------------------------------------------------------
 function makeLifecycleHook(method: string, reverse: boolean = false) {
   if (reverse) {
-    return function(cb) {
+    return function (cb) {
       const component: Component = Component.current!;
       if (component.__owl__[method]) {
         const current = component.__owl__[method];
-        component.__owl__[method] = function() {
+        component.__owl__[method] = function () {
           current.call(component);
           cb.call(component);
         };
@@ -49,11 +49,11 @@ function makeLifecycleHook(method: string, reverse: boolean = false) {
       }
     };
   } else {
-    return function(cb) {
+    return function (cb) {
       const component: Component = Component.current!;
       if (component.__owl__[method]) {
         const current = component.__owl__[method];
-        component.__owl__[method] = function() {
+        component.__owl__[method] = function () {
           cb.call(component);
           current.call(component);
         };
@@ -65,12 +65,12 @@ function makeLifecycleHook(method: string, reverse: boolean = false) {
 }
 
 function makeAsyncHook(method: string) {
-  return function(cb) {
+  return function (cb) {
     const component: Component = Component.current!;
     if (component.__owl__[method]) {
       const current = component.__owl__[method];
-      component.__owl__[method] = function(...args) {
-        return Promise.all[(current.call(component, ...args), cb.call(component, ...args))];
+      component.__owl__[method] = function (...args) {
+        return Promise.all([current.call(component, ...args), cb.call(component, ...args)]);
       };
     } else {
       component.__owl__[method] = cb;
@@ -94,12 +94,12 @@ export const onWillUpdateProps = makeAsyncHook("willUpdatePropsCB");
  * The purpose of this hook is to allow components to get a reference to a sub
  * html node or component.
  */
-interface Ref {
+interface Ref<C extends Component = Component> {
   el: HTMLElement | null;
-  comp: Component | null;
+  comp: C | null;
 }
 
-export function useRef(name: string): Ref {
+export function useRef<C extends Component = Component>(name: string): Ref<C> {
   const __owl__ = Component.current!.__owl__;
   return {
     get el(): HTMLElement | null {
@@ -111,10 +111,10 @@ export function useRef(name: string): Ref {
       }
       return null;
     },
-    get comp(): Component | null {
+    get comp(): C | null {
       const val = __owl__.refs && __owl__.refs[name];
-      return val instanceof Component ? val : null;
-    }
+      return val instanceof Component ? (val as C) : null;
+    },
   };
 }
 

src/index.ts

@@ -35,6 +35,6 @@ export const hooks = Object.assign({}, _hooks, {
   useContext: _context.useContext,
   useDispatch: _store.useDispatch,
   useGetters: _store.useGetters,
-  useStore: _store.useStore
+  useStore: _store.useStore,
 });
 export const __info__ = {};

src/misc/portal.ts

@@ -26,8 +26,8 @@ export class Portal extends Component<Props> {
   static template = xml`<portal><t t-slot="default"/></portal>`;
   static props = {
     target: {
-      type: String
-    }
+      type: String,
+    },
   };
 
   // boolean to indicate whether or not we must listen to 'dom-appended' event
@@ -55,12 +55,12 @@ export class Portal extends Component<Props> {
     // put a callback in the env that is propagated to children s.t. portal can
     // register an handler to those events just before children will trigger them
     useSubEnv({
-      [portalSymbol]: ev => {
+      [portalSymbol]: (ev) => {
         if (!this._handledEvents.has(ev.type)) {
           this.portal!.elm!.addEventListener(ev.type, this._handlerTunnel);
           this._handledEvents.add(ev.type);
         }
-      }
+      },
     });
   }
   /**

src/qweb/base_directives.ts

@@ -1,4 +1,4 @@
-import { CompilationContext } from "./compilation_context";
+import { CompilationContext, INTERP_REGEXP } from "./compilation_context";
 import { QWeb } from "./qweb";
 import { htmlToVDOM } from "../vdom/html_to_vdom";
 import { QWebVar } from "./expression_parser";
@@ -49,6 +49,7 @@ function compileValueNode(value: any, node: Element, qweb: QWeb, ctx: Compilatio
   if (ctx.escaping) {
     let protectID;
     if (value.hasBody) {
+      ctx.rootContext.shouldDefineUtils = true;
       protectID = ctx.startProtectScope();
       ctx.addLine(
         `${exprID} = ${exprID} instanceof utils.VDomArray ? utils.vDomToString(${exprID}) : ${exprID};`
@@ -96,7 +97,7 @@ QWeb.addDirective({
     let value = ctx.getValue(node.getAttribute("t-esc")!);
     compileValueNode(value, node, qweb, ctx.subContext("escaping", true));
     return true;
-  }
+  },
 });
 
 QWeb.addDirective({
@@ -106,7 +107,7 @@ QWeb.addDirective({
     let value = ctx.getValue(node.getAttribute("t-raw")!);
     compileValueNode(value, node, qweb, ctx);
     return true;
-  }
+  },
 });
 
 //------------------------------------------------------------------------------
@@ -163,7 +164,7 @@ QWeb.addDirective({
       }
     }
     return true;
-  }
+  },
 });
 
 //------------------------------------------------------------------------------
@@ -179,7 +180,7 @@ QWeb.addDirective({
   },
   finalize({ ctx }) {
     ctx.closeIf();
-  }
+  },
 });
 
 QWeb.addDirective({
@@ -195,7 +196,7 @@ QWeb.addDirective({
   },
   finalize({ ctx }) {
     ctx.closeIf();
-  }
+  },
 });
 
 QWeb.addDirective({
@@ -208,7 +209,7 @@ QWeb.addDirective({
   },
   finalize({ ctx }) {
     ctx.closeIf();
-  }
+  },
 });
 
 //------------------------------------------------------------------------------
@@ -222,77 +223,88 @@ QWeb.addDirective({
     // ------------------------------------------------
     ctx.rootContext.shouldDefineScope = true;
     ctx.rootContext.shouldDefineUtils = true;
-    if (node.nodeName !== "t") {
-      throw new Error("Invalid tag for t-call directive (should be 't')");
-    }
     const subTemplate = node.getAttribute("t-call")!;
+    const isDynamic = INTERP_REGEXP.test(subTemplate);
     const nodeTemplate = qweb.templates[subTemplate];
-    if (!nodeTemplate) {
+    if (!isDynamic && !nodeTemplate) {
       throw new Error(`Cannot find template "${subTemplate}" (t-call)`);
     }
 
     // Step 2: compile target template in sub templates
     // ------------------------------------------------
-    if (!qweb.subTemplates[subTemplate]) {
-      qweb.subTemplates[subTemplate] = true;
-      const subTemplateFn = qweb._compile(subTemplate, nodeTemplate.elem, ctx, true);
-      qweb.subTemplates[subTemplate] = subTemplateFn;
+    let subIdstr: string;
+    if (isDynamic) {
+      const _id = ctx.generateID();
+      ctx.addLine(`let tname${_id} = ${ctx.interpolate(subTemplate)};`);
+      ctx.addLine(`let tid${_id} = this.subTemplates[tname${_id}];`);
+      ctx.addIf(`!tid${_id}`);
+      ctx.addLine(`tid${_id} = this.constructor.nextId++;`);
+      ctx.addLine(`this.subTemplates[tname${_id}] = tid${_id};`);
+      ctx.addLine(
+        `this.constructor.subTemplates[tid${_id}] = this._compile(tname${_id}, {hasParent: true, defineKey: true});`
+      );
+      ctx.closeIf();
+      subIdstr = `tid${_id}`;
+    } else {
+      let subId = qweb.subTemplates[subTemplate];
+      if (!subId) {
+        subId = QWeb.nextId++;
+        qweb.subTemplates[subTemplate] = subId;
+        const subTemplateFn = qweb._compile(subTemplate, { hasParent: true, defineKey: true });
+        QWeb.subTemplates[subId] = subTemplateFn;
+      }
+      subIdstr = `'${subId}'`;
     }
 
     // Step 3: compile t-call body if necessary
     // ------------------------------------------------
     let hasBody = node.hasChildNodes();
-    let protectID;
+    const protectID = ctx.startProtectScope();
     if (hasBody) {
       // we add a sub scope to protect the ambient scope
       ctx.addLine(`{`);
       ctx.indent();
-      protectID = ctx.startProtectScope();
       const nodeCopy = node.cloneNode(true) as Element;
       for (let attr of ["t-if", "t-else", "t-elif", "t-call"]) {
         nodeCopy.removeAttribute(attr);
       }
-      const parentNode = ctx.parentNode;
-      ctx.parentNode = "__0";
       // this local scope is intended to trap c__0
       ctx.addLine(`{`);
       ctx.indent();
       ctx.addLine("let c__0 = [];");
-      qweb._compileNode(nodeCopy, ctx);
+      qweb._compileNode(nodeCopy, ctx.subContext("parentNode", "__0"));
       ctx.rootContext.shouldDefineUtils = true;
       ctx.addLine("scope[utils.zero] = c__0;");
-      ctx.parentNode = parentNode;
       ctx.dedent();
       ctx.addLine(`}`);
     }
 
     // Step 4: add the appropriate function call to current component
     // ------------------------------------------------
-    const callingScope = hasBody ? "scope" : "Object.assign(Object.create(context), scope)";
     const parentComponent = `utils.getComponent(context)`;
     const key = ctx.generateTemplateKey();
     const parentNode = ctx.parentNode ? `c${ctx.parentNode}` : "result";
     const extra = `Object.assign({}, extra, {parentNode: ${parentNode}, parent: ${parentComponent}, key: ${key}})`;
     if (ctx.parentNode) {
-      ctx.addLine(`this.subTemplates['${subTemplate}'].call(this, ${callingScope}, ${extra});`);
+      ctx.addLine(`this.constructor.subTemplates[${subIdstr}].call(this, scope, ${extra});`);
     } else {
       // this is a t-call with no parentnode, we need to extract the result
       ctx.rootContext.shouldDefineResult = true;
       ctx.addLine(`result = []`);
-      ctx.addLine(`this.subTemplates['${subTemplate}'].call(this, ${callingScope}, ${extra});`);
+      ctx.addLine(`this.constructor.subTemplates[${subIdstr}].call(this, scope, ${extra});`);
       ctx.addLine(`result = result[0]`);
     }
 
     // Step 5: restore previous scope
     // ------------------------------------------------
     if (hasBody) {
-      ctx.stopProtectScope(protectID);
       ctx.dedent();
       ctx.addLine(`}`);
     }
+    ctx.stopProtectScope(protectID);
 
     return true;
-  }
+  },
 });
 
 //------------------------------------------------------------------------------
@@ -353,7 +365,7 @@ QWeb.addDirective({
     ctx.addLine("}");
     ctx.stopProtectScope(varsID);
     return true;
-  }
+  },
 });
 
 //------------------------------------------------------------------------------
@@ -364,7 +376,7 @@ QWeb.addDirective({
   priority: 1,
   atNodeEncounter({ ctx }) {
     ctx.addLine("debugger;");
-  }
+  },
 });
 
 //------------------------------------------------------------------------------
@@ -376,5 +388,5 @@ QWeb.addDirective({
   atNodeEncounter({ ctx, value }) {
     const expr = ctx.formatExpression(value);
     ctx.addLine(`console.log(${expr})`);
-  }
+  },
 });

src/qweb/compilation_context.ts

@@ -162,7 +162,7 @@ export class CompilationContext {
     const tokens = compileExprToArray(expr, this.variables);
     const done = new Set();
     return tokens
-      .map(tok => {
+      .map((tok) => {
         if (tok.varName) {
           if (!done.has(tok.varName)) {
             done.add(tok.varName);
@@ -189,18 +189,19 @@ export class CompilationContext {
       return `(${this.formatExpression(s.slice(2, -2))})`;
     }
 
-    let r = s.replace(/\{\{.*?\}\}/g, s => "${" + this.formatExpression(s.slice(2, -2)) + "}");
+    let r = s.replace(/\{\{.*?\}\}/g, (s) => "${" + this.formatExpression(s.slice(2, -2)) + "}");
     return "`" + r + "`";
   }
   startProtectScope(codeBlock?: boolean): number {
     const protectID = this.generateID();
     this.rootContext.protectedScopeNumber++;
     this.rootContext.shouldDefineScope = true;
-    const scopeExpr = codeBlock
-      ? `Object.create(scope);`
-      : `Object.assign(Object.create(context), scope);`;
+    const scopeExpr = `Object.create(scope);`;
     this.addLine(`let _origScope${protectID} = scope;`);
     this.addLine(`scope = ${scopeExpr}`);
+    if (!codeBlock) {
+      this.addLine(`scope.__access_mode__ = 'ro';`);
+    }
     return protectID;
   }
   stopProtectScope(protectID: number) {

src/qweb/expression_parser.ts

@@ -35,7 +35,7 @@ const WORD_REPLACEMENT = {
   gt: ">",
   gte: ">=",
   lt: "<",
-  lte: "<="
+  lte: "<=",
 };
 
 export interface QWebVar {
@@ -77,7 +77,7 @@ const STATIC_TOKEN_MAP: { [key: string]: TKind } = {
   ":": "COLON",
   ",": "COMMA",
   "(": "LEFT_PAREN",
-  ")": "RIGHT_PAREN"
+  ")": "RIGHT_PAREN",
 };
 
 // note that the space after typeof is relevant. It makes sure that the formatted
@@ -86,7 +86,7 @@ const OPERATORS = "...,.,===,==,+,!==,!=,!,||,&&,>=,>,<=,<,?,-,*,/,%,typeof ,=>,
 
 type Tokenizer = (expr: string) => Token | false;
 
-let tokenizeString: Tokenizer = function(expr) {
+let tokenizeString: Tokenizer = function (expr) {
   let s = expr[0];
   let start = s;
   if (s !== "'" && s !== '"') {
@@ -114,7 +114,7 @@ let tokenizeString: Tokenizer = function(expr) {
   return { type: "VALUE", value: s };
 };
 
-let tokenizeNumber: Tokenizer = function(expr) {
+let tokenizeNumber: Tokenizer = function (expr) {
   let s = expr[0];
   if (s && s.match(/[0-9]/)) {
     let i = 1;
@@ -128,7 +128,7 @@ let tokenizeNumber: Tokenizer = function(expr) {
   }
 };
 
-let tokenizeSymbol: Tokenizer = function(expr) {
+let tokenizeSymbol: Tokenizer = function (expr) {
   let s = expr[0];
   if (s && s.match(/[a-zA-Z_\$]/)) {
     let i = 1;
@@ -145,7 +145,7 @@ let tokenizeSymbol: Tokenizer = function(expr) {
   }
 };
 
-const tokenizeStatic: Tokenizer = function(expr) {
+const tokenizeStatic: Tokenizer = function (expr) {
   const char = expr[0];
   if (char && char in STATIC_TOKEN_MAP) {
     return { type: STATIC_TOKEN_MAP[char], value: char };
@@ -153,7 +153,7 @@ const tokenizeStatic: Tokenizer = function(expr) {
   return false;
 };
 
-const tokenizeOperator: Tokenizer = function(expr) {
+const tokenizeOperator: Tokenizer = function (expr) {
   for (let op of OPERATORS) {
     if (expr.startsWith(op)) {
       return { type: "OPERATOR", value: op };
@@ -167,7 +167,7 @@ const TOKENIZERS = [
   tokenizeNumber,
   tokenizeOperator,
   tokenizeSymbol,
-  tokenizeStatic
+  tokenizeStatic,
 ];
 
 /**
@@ -284,6 +284,6 @@ export function compileExprToArray(expr: string, scope: { [key: string]: QWebVar
 
 export function compileExpr(expr: string, scope: { [key: string]: QWebVar }): string {
   return compileExprToArray(expr, scope)
-    .map(t => t.value)
+    .map((t) => t.value)
     .join("");
 }

src/qweb/extensions.ts

@@ -23,7 +23,7 @@ import { QWeb } from "./qweb";
 export const MODS_CODE = {
   prevent: "e.preventDefault();",
   self: "if (e.target !== this.elm) {return}",
-  stop: "e.stopPropagation();"
+  stop: "e.stopPropagation();",
 };
 
 interface HandlerInfo {
@@ -50,7 +50,7 @@ export function makeHandlerCode(
   let code: string;
   // check if it is a method with no args, a method with args or an expression
   let args: string = "";
-  const name: string = value.replace(/\(.*\)/, function(_args) {
+  const name: string = value.replace(/\(.*\)/, function (_args) {
     args = _args.slice(1, -1);
     return "";
   });
@@ -74,7 +74,7 @@ export function makeHandlerCode(
     putInCache = false;
     code = ctx.captureExpression(value);
   }
-  const modCode = mods.map(mod => modcodes[mod]).join("");
+  const modCode = mods.map((mod) => modcodes[mod]).join("");
   let handler = `function (e) {if (!context.__owl__.isMounted){return}${modCode}${code}}`;
   if (putInCache) {
     const key = ctx.generateTemplateKey(event);
@@ -90,7 +90,7 @@ QWeb.addDirective({
   atNodeCreation({ ctx, fullName, value, nodeID }) {
     const { event, handler } = makeHandlerCode(ctx, fullName, value, true);
     ctx.addLine(`p${nodeID}.on['${event}'] = ${handler};`);
-  }
+  },
 });
 
 //------------------------------------------------------------------------------
@@ -105,17 +105,17 @@ QWeb.addDirective({
     ctx.addLine(`const ${refKey} = ${ctx.interpolate(value)};`);
     addNodeHook("create", `context.__owl__.refs[${refKey}] = n.elm;`);
     addNodeHook("destroy", `delete context.__owl__.refs[${refKey}];`);
-  }
+  },
 });
 
 //------------------------------------------------------------------------------
 // t-transition
 //------------------------------------------------------------------------------
-QWeb.utils.nextFrame = function(cb: () => void) {
+QWeb.utils.nextFrame = function (cb: () => void) {
   requestAnimationFrame(() => requestAnimationFrame(cb));
 };
 
-QWeb.utils.transitionInsert = function(vn: VNode, name: string) {
+QWeb.utils.transitionInsert = function (vn: VNode, name: string) {
   const elm = <HTMLElement>vn.elm;
   // remove potential duplicated vnode that is currently being removed, to
   // prevent from having twice the same node in the DOM during an animation
@@ -139,7 +139,7 @@ QWeb.utils.transitionInsert = function(vn: VNode, name: string) {
   });
 };
 
-QWeb.utils.transitionRemove = function(vn: VNode, name: string, rm: () => void) {
+QWeb.utils.transitionRemove = function (vn: VNode, name: string, rm: () => void) {
   const elm = <HTMLElement>vn.elm;
   elm.setAttribute("data-owl-key", vn.key!);
 
@@ -205,16 +205,19 @@ QWeb.addDirective({
   name: "transition",
   priority: 96,
   atNodeCreation({ ctx, value, addNodeHook }) {
+    if (!QWeb.enableTransitions) {
+      return;
+    }
     ctx.rootContext.shouldDefineUtils = true;
     let name = value;
     const hooks = {
       insert: `utils.transitionInsert(vn, '${name}');`,
-      remove: `utils.transitionRemove(vn, '${name}', rm);`
+      remove: `utils.transitionRemove(vn, '${name}', rm);`,
     };
     for (let hookName in hooks) {
       addNodeHook(hookName, hooks[hookName]);
     }
-  }
+  },
 });
 
 //------------------------------------------------------------------------------
@@ -251,17 +254,20 @@ QWeb.addDirective({
     }
     ctx.closeIf();
     return true;
-  }
+  },
 });
 
 //------------------------------------------------------------------------------
 // t-model
 //------------------------------------------------------------------------------
-QWeb.utils.toNumber = function(val: string): number | string {
+QWeb.utils.toNumber = function (val: string): number | string {
   const n = parseFloat(val);
   return isNaN(n) ? val : n;
 };
 
+const hasDotAtTheEnd = /\.[\w_]+\s*$/;
+const hasBracketsAtTheEnd = /\[[^\[]+\]\s*$/;
+
 QWeb.addDirective({
   name: "model",
   priority: 42,
@@ -270,15 +276,41 @@ QWeb.addDirective({
     let handler;
     let event = fullName.includes(".lazy") ? "change" : "input";
 
-    // we keep here a reference to the "base expression" (if the expression
-    // is `t-model="some.expr.value", then the base expression is "some.expr").
-    // This is necessary so we can capture it in the handler closure.
-    let expr = ctx.formatExpression(value);
-    const index = expr.lastIndexOf(".");
-    const baseExpr = expr.slice(0, index);
-    ctx.addLine(`let expr${nodeID} = ${baseExpr};`);
+    // First step: we need to understand the structure of the expression, and
+    // from it, extract a base expression (that we can capture, which is
+    // important because it will be used in a handler later) and a formatted
+    // expression (which uses the captured base expression)
+    //
+    // Also, we support 2 kinds of values: some.expr.value or some.expr[value]
+    // For the first one, we have:
+    // - base expression = scope[some].expr
+    // - expression = exprX.value (where exprX is the var that captures the base expr)
+    // and for the expression with brackets:
+    // - base expression = scope[some].expr
+    // - expression = exprX[keyX] (where exprX is the var that captures the base expr
+    //        and keyX captures scope[value])
+    let expr: string;
+    let baseExpr: string;
+
+    if (hasDotAtTheEnd.test(value)) {
+      // we manage the case where the expr has a dot: some.expr.value
+      const index = value.lastIndexOf(".");
+      baseExpr = value.slice(0, index);
+      ctx.addLine(`let expr${nodeID} = ${ctx.formatExpression(baseExpr)};`);
+      expr = `expr${nodeID}${value.slice(index)}`;
+    } else if (hasBracketsAtTheEnd.test(value)) {
+      // we manage here the case where the expr ends in a bracket expression:
+      //    some.expr[value]
+      const index = value.lastIndexOf("[");
+      baseExpr = value.slice(0, index);
+      ctx.addLine(`let expr${nodeID} = ${ctx.formatExpression(baseExpr)};`);
+      let exprKey = value.trimRight().slice(index + 1, -1);
+      ctx.addLine(`let exprKey${nodeID} = ${ctx.formatExpression(exprKey)};`);
+      expr = `expr${nodeID}[exprKey${nodeID}]`;
+    } else {
+      throw new Error(`Invalid t-model expression: "${value}" (it should be assignable)`);
+    }
 
-    expr = `expr${nodeID}.${expr.slice(index + 1)}`;
     const key = ctx.generateTemplateKey();
     if (node.tagName === "select") {
       ctx.addLine(`p${nodeID}.props = {value: ${expr}};`);
@@ -305,7 +337,7 @@ QWeb.addDirective({
     }
     ctx.addLine(`extra.handlers[${key}] = extra.handlers[${key}] || (${handler});`);
     ctx.addLine(`p${nodeID}.on['${event}'] = extra.handlers[${key}];`);
-  }
+  },
 });
 
 //------------------------------------------------------------------------------
@@ -329,5 +361,5 @@ QWeb.addDirective({
     if (ctx.loopNumber === 0) {
       ctx.rootContext.hasKey0 = ctx.keyStack.pop() as boolean;
     }
-  }
+  },
 });

src/qweb/qweb.ts

@@ -66,8 +66,6 @@ interface QWebConfig {
 // Const/global stuff/helpers
 //------------------------------------------------------------------------------
 
-const DISABLED_TAGS = ["input", "textarea", "button", "select", "option", "optgroup"];
-
 const TRANSLATABLE_ATTRS = ["label", "title", "placeholder", "alt"];
 
 const lineBreakRE = /[\r\n]/;
@@ -77,7 +75,7 @@ const NODE_HOOKS_PARAMS = {
   create: "(_, n)",
   insert: "vn",
   remove: "(vn, rm)",
-  destroy: "()"
+  destroy: "()",
 };
 
 interface Utils {
@@ -86,10 +84,30 @@ interface Utils {
   [key: string]: any;
 }
 
-function isComponent(obj) {
+function isComponent(obj): boolean {
   return obj && obj.hasOwnProperty("__owl__");
 }
 
+class VDomArray extends Array {
+  toString() {
+    return vDomToString(this);
+  }
+}
+
+function vDomToString(vdom: VNode[]): string {
+  return vdom
+    .map((vnode) => {
+      if (vnode.sel) {
+        const node = document.createElement(vnode.sel);
+        const result = patch(node, vnode);
+        return (<HTMLElement>result.elm).outerHTML;
+      } else {
+        return vnode.text;
+      }
+    })
+    .join("");
+}
+
 const UTILS: Utils = {
   zero: Symbol("zero"),
   toObj(expr) {
@@ -111,20 +129,8 @@ const UTILS: Utils = {
   addNameSpace(vnode) {
     addNS(vnode.data, vnode.children, vnode.sel);
   },
-  VDomArray: class VDomArray extends Array {},
-  vDomToString: function(vdom: VNode[]): string {
-    return vdom
-      .map(vnode => {
-        if (vnode.sel) {
-          const node = document.createElement(vnode.sel);
-          const result = patch(node, vnode);
-          return (<HTMLElement>result.elm).outerHTML;
-        } else {
-          return vnode.text;
-        }
-      })
-      .join("");
-  },
+  VDomArray,
+  vDomToString,
   getComponent(obj) {
     while (obj && !isComponent(obj)) {
       obj = obj.__proto__;
@@ -133,7 +139,11 @@ const UTILS: Utils = {
   },
   getScope(obj, property: string) {
     const obj0 = obj;
-    while (obj && !obj.hasOwnProperty(property)) {
+    while (
+      obj &&
+      !obj.hasOwnProperty(property) &&
+      !(obj.hasOwnProperty("__access_mode__") && obj.__access_mode__ === "ro")
+    ) {
       const newObj = obj.__proto__;
       if (!newObj || isComponent(newObj)) {
         return obj0;
@@ -141,7 +151,7 @@ const UTILS: Utils = {
       obj = newObj;
     }
     return obj;
-  }
+  },
 };
 
 function parseXML(xml: string): Document {
@@ -191,7 +201,7 @@ export class QWeb extends EventBus {
     name: 1,
     att: 1,
     attf: 1,
-    translation: 1
+    translation: 1,
   };
   static DIRECTIVES: Directive[] = [];
 
@@ -202,16 +212,19 @@ export class QWeb extends EventBus {
   h = h;
   // dev mode enables better error messages or more costly validations
   static dev: boolean = false;
+  static enableTransitions: boolean = true;
 
   // slots contains sub templates defined with t-set inside t-component nodes, and
   // are meant to be used by the t-slot directive.
   static slots = {};
   static nextSlotId = 1;
 
-  // recursiveTemplates contains sub templates called with t-call, but which
-  // ends up in recursive situations.  This is very similar to the slot situation,
-  // as in we need to propagate the scope.
-  subTemplates = {};
+  // subTemplates are stored in two objects: a (local) mapping from a name to an
+  // id, and a (global) mapping from an id to the compiled function.  This is
+  // necessary to ensure that global templates can be called with more than one
+  // QWeb instance.
+  subTemplates: { [key: string]: number } = {};
+  static subTemplates: { [id: number]: Function } = {};
 
   isUpdating: boolean = false;
   translateFn?: QWebConfig["translateFn"];
@@ -235,7 +248,7 @@ export class QWeb extends EventBus {
     QWeb.DIRECTIVE_NAMES[directive.name] = 1;
     QWeb.DIRECTIVES.sort((d1, d2) => d1.priority - d2.priority);
     if (directive.extraNames) {
-      directive.extraNames.forEach(n => (QWeb.DIRECTIVE_NAMES[n] = 1));
+      directive.extraNames.forEach((n) => (QWeb.DIRECTIVE_NAMES[n] = 1));
     }
   }
 
@@ -299,11 +312,11 @@ export class QWeb extends EventBus {
     this._processTemplate(elem);
     const template = {
       elem,
-      fn: function(this: QWeb, context, extra) {
-        const compiledFunction = this._compile(name, elem);
+      fn: function (this: QWeb, context, extra) {
+        const compiledFunction = this._compile(name);
         template.fn = compiledFunction;
         return compiledFunction.call(this, context, extra);
-      }
+      },
     };
     this.templates[name] = template;
   }
@@ -313,10 +326,10 @@ export class QWeb extends EventBus {
     for (let i = 0, ilen = tbranch.length; i < ilen; i++) {
       let node = tbranch[i];
       let prevElem = node.previousElementSibling!;
-      let pattr = function(name) {
+      let pattr = function (name) {
         return prevElem.getAttribute(name);
       };
-      let nattr = function(name) {
+      let nattr = function (name) {
         return +!!node.getAttribute(name);
       };
       if (prevElem && (pattr("t-if") || pattr("t-elif"))) {
@@ -326,7 +339,7 @@ export class QWeb extends EventBus {
           );
         }
         if (
-          ["t-if", "t-elif", "t-else"].map(nattr).reduce(function(a, b) {
+          ["t-if", "t-elif", "t-else"].map(nattr).reduce(function (a, b) {
             return a + b;
           }) > 1
         ) {
@@ -405,30 +418,33 @@ export class QWeb extends EventBus {
 
   _compile(
     name: string,
-    elem: Element,
-    parentContext?: CompilationContext,
-    defineKey?: boolean
+    options: {
+      elem?: Element;
+      hasParent?: boolean;
+      defineKey?: boolean;
+    } = {}
   ): CompiledTemplate {
+    const elem = options.elem || this.templates[name].elem;
     const isDebug = elem.attributes.hasOwnProperty("t-debug");
     const ctx = new CompilationContext(name);
     if (elem.tagName !== "t") {
       ctx.shouldDefineResult = false;
     }
-    if (parentContext) {
-      ctx.variables = Object.create(parentContext.variables);
-      ctx.parentNode = parentContext.parentNode || ctx.generateID();
+    if (options.hasParent) {
+      ctx.variables = Object.create(null);
+      ctx.parentNode = ctx.generateID();
       ctx.allowMultipleRoots = true;
       ctx.hasParentWidget = true;
       ctx.shouldDefineResult = false;
       ctx.addLine(`let c${ctx.parentNode} = extra.parentNode;`);
-      if (defineKey) {
+      if (options.defineKey) {
         ctx.addLine(`let key0 = extra.key || "";`);
         ctx.hasKey0 = true;
       }
     }
     this._compileNode(elem, ctx);
 
-    if (!parentContext) {
+    if (!options.hasParent) {
       if (ctx.shouldDefineResult) {
         ctx.addLine(`return result;`);
       } else {
@@ -503,10 +519,17 @@ export class QWeb extends EventBus {
       return;
     }
 
+    if (node.tagName !== "t" && node.hasAttribute("t-call")) {
+      const tCallNode = document.createElement("t");
+      tCallNode.setAttribute("t-call", node.getAttribute("t-call")!);
+      node.removeAttribute("t-call");
+      node.prepend(tCallNode);
+    }
+
     const firstLetter = node.tagName[0];
     if (firstLetter === firstLetter.toUpperCase()) {
       // this is a component, we modify in place the xml document to change
-      // <SomeComponent ... /> to <t t-component="SomeComponent" ... />
+      // <SomeComponent ... /> to <SomeComponent t-component="SomeComponent" ... />
       node.setAttribute("t-component", node.tagName);
     } else if (node.tagName !== "t" && node.hasAttribute("t-component")) {
       throw new Error(
@@ -578,7 +601,7 @@ export class QWeb extends EventBus {
           qweb: this,
           ctx,
           fullName,
-          value
+          value,
         });
         if (isDone) {
           for (let { directive, value, fullName } of finalizers) {
@@ -593,7 +616,7 @@ export class QWeb extends EventBus {
       let nodeID = this._compileGenericNode(node, ctx, withHandlers);
       ctx = ctx.withParent(nodeID);
       let nodeHooks = {};
-      let addNodeHook = function(hook, handler) {
+      let addNodeHook = function (hook, handler) {
         nodeHooks[hook] = nodeHooks[hook] || [];
         nodeHooks[hook].push(handler);
       };
@@ -607,7 +630,7 @@ export class QWeb extends EventBus {
             fullName,
             value,
             nodeID,
-            addNodeHook
+            addNodeHook,
           });
         }
       }
@@ -660,22 +683,31 @@ export class QWeb extends EventBus {
     const props: string[] = [];
     const tattrs: number[] = [];
 
-    function handleBooleanProps(key, val) {
+    function handleProperties(key, val) {
       let isProp = false;
-      if (node.nodeName === "input" && key === "checked") {
-        let type = (<Element>node).getAttribute("type");
-        if (type === "checkbox" || type === "radio") {
-          isProp = true;
-        }
-      }
-      if (node.nodeName === "option" && key === "selected") {
-        isProp = true;
-      }
-      if (key === "disabled" && DISABLED_TAGS.indexOf(node.nodeName) > -1) {
-        isProp = true;
-      }
-      if ((key === "readonly" && node.nodeName === "input") || node.nodeName === "textarea") {
-        isProp = true;
+      switch (node.nodeName) {
+        case "input":
+          let type = (<Element>node).getAttribute("type");
+          if (type === "checkbox" || type === "radio") {
+            if (key === "checked" || key === "indeterminate") {
+              isProp = true;
+            }
+          }
+          if (key === "value" || key === "readonly" || key === "disabled") {
+            isProp = true;
+          }
+          break;
+        case "option":
+          isProp = key === "selected" || key === "disabled";
+          break;
+        case "textarea":
+          isProp = key === "readonly" || key === "disabled";
+          break;
+        case "button":
+        case "select":
+        case "optgroup":
+          isProp = key === "disabled";
+          break;
       }
       if (isProp) {
         props.push(`${key}: _${val}`);
@@ -698,10 +730,14 @@ export class QWeb extends EventBus {
           if ((value = value.trim())) {
             let classDef = value
               .split(/\s+/)
-              .map(a => `'${escapeQuotes(a)}':true`)
+              .map((a) => `'${escapeQuotes(a)}':true`)
               .join(",");
-            classObj = `_${ctx.generateID()}`;
-            ctx.addLine(`let ${classObj} = {${classDef}};`);
+            if (classObj) {
+              ctx.addLine(`Object.assign(${classObj}, {${classDef}})`);
+            } else {
+              classObj = `_${ctx.generateID()}`;
+              ctx.addLine(`let ${classObj} = {${classDef}};`);
+            }
           }
         } else {
           ctx.addLine(`let _${attID} = '${escapeQuotes(value)}';`);
@@ -710,7 +746,7 @@ export class QWeb extends EventBus {
             name = '"' + name + '"';
           }
           attrs.push(`${name}: _${attID}`);
-          handleBooleanProps(name, attID);
+          handleProperties(name, attID);
         }
       }
 
@@ -742,12 +778,12 @@ export class QWeb extends EventBus {
             const attValueID = ctx.generateID();
             ctx.addLine(`let _${attValueID} = ${formattedValue};`);
             formattedValue = `'${attValue}' + (_${attValueID} ? ' ' + _${attValueID} : '')`;
-            const attrIndex = attrs.findIndex(att => att.startsWith(attName + ":"));
+            const attrIndex = attrs.findIndex((att) => att.startsWith(attName + ":"));
             attrs.splice(attrIndex, 1);
           }
           ctx.addLine(`let _${attID} = ${formattedValue};`);
           attrs.push(`${attName}: _${attID}`);
-          handleBooleanProps(attName, attID);
+          handleProperties(attName, attID);
         }
       }
 

src/router/route_component.ts

@@ -1,7 +1,8 @@
 import { Component } from "../component/component";
 import { xml } from "../tags";
+import { EnvWithRouter } from "./router";
 
-export class RouteComponent extends Component {
+export class RouteComponent extends Component<{}, EnvWithRouter> {
   static template = xml`
     <t>
         <t

src/router/router.ts

@@ -49,6 +49,10 @@ interface Options {
   mode: Router["mode"];
 }
 
+export interface EnvWithRouter extends Env {
+  router: Router;
+}
+
 const paramRegexp = /\{\{(.*?)\}\}/;
 
 export class Router {
@@ -60,7 +64,11 @@ export class Router {
   routeIds: string[];
   env: RouterEnv;
 
-  constructor(env: Env, routes: Partial<Route>[], options: Options = { mode: "history" }) {
+  constructor(
+    env: Partial<EnvWithRouter>,
+    routes: Partial<Route>[],
+    options: Options = { mode: "history" }
+  ) {
     env.router = this;
     this.mode = options.mode;
     this.env = env as RouterEnv;
@@ -89,7 +97,7 @@ export class Router {
   //--------------------------------------------------------------------------
 
   async start() {
-    (this as any)._listener = ev => this._navigate(this.currentPath(), ev);
+    (this as any)._listener = (ev) => this._navigate(this.currentPath(), ev);
     window.addEventListener("popstate", (this as any)._listener);
     if (this.mode === "hash") {
       window.addEventListener("hashchange", (this as any)._listener);
@@ -190,7 +198,7 @@ export class Router {
         return {
           type: "match",
           route: route,
-          params: params
+          params: params,
         };
       }
     }
@@ -215,7 +223,7 @@ export class Router {
       const result = await route.beforeRouteEnter({
         env: this.env,
         from: this.currentRoute,
-        to: route
+        to: route,
       });
       if (result === false) {
         return { type: "cancelled" };

src/store.ts

@@ -24,6 +24,10 @@ import { onWillUpdateProps } from "./hooks";
 // Store Definition
 //------------------------------------------------------------------------------
 
+export interface EnvWithStore extends Env {
+  store: Store;
+}
+
 export type Action = ({ state, dispatch, env, getters }, ...payload: any) => any;
 export type Getter = ({ state: any, getters }, payload?) => any;
 
@@ -49,7 +53,7 @@ export class Store extends Context {
     if (config.getters) {
       const firstArg = {
         state: this.state,
-        getters: this.getters
+        getters: this.getters,
       };
       for (let g in config.getters) {
         this.getters[g] = config.getters[g].bind(this, firstArg);
@@ -66,7 +70,7 @@ export class Store extends Context {
         dispatch: this.dispatch.bind(this),
         env: this.env,
         state: this.state,
-        getters: this.getters
+        getters: this.getters,
       },
       ...payload
     );
@@ -83,7 +87,7 @@ interface SelectorOptions {
 const isStrictEqual = (a, b) => a === b;
 
 export function useStore(selector, options: SelectorOptions = {}): any {
-  const component: Component = Component.current!;
+  const component = Component.current as Component<any, EnvWithStore>;
   const componentId = component.__owl__.id;
   const store = options.store || (component.env.store as Store);
   if (!(store instanceof Store)) {
@@ -109,11 +113,11 @@ export function useStore(selector, options: SelectorOptions = {}): any {
     }
     return false;
   }
-  store.updateFunctions[componentId].push(function(): boolean {
+  store.updateFunctions[componentId].push(function (): boolean {
     return selectCompareUpdate(store!.state, component.props);
   });
 
-  useContextWithCB(store, component, function(): Promise<void> | void {
+  useContextWithCB(store, component, function (): Promise<void> | void {
     let shouldRender = false;
     for (let fn of store.updateFunctions[componentId]) {
       shouldRender = fn() || shouldRender;
@@ -122,12 +126,12 @@ export function useStore(selector, options: SelectorOptions = {}): any {
       return component.render();
     }
   });
-  onWillUpdateProps(props => {
+  onWillUpdateProps((props) => {
     selectCompareUpdate(store.state, props);
   });
 
   const __destroy = component.__destroy;
-  component.__destroy = parent => {
+  component.__destroy = (parent) => {
     delete store.updateFunctions[componentId];
     __destroy.call(component, parent);
   };
@@ -144,16 +148,16 @@ export function useStore(selector, options: SelectorOptions = {}): any {
     },
     has(target, k) {
       return k in result;
-    }
+    },
   });
 }
 
 export function useDispatch(store?: Store): Store["dispatch"] {
-  store = store || (Component.current!.env.store as Store);
+  store = store || (Component.current!.env as EnvWithStore).store;
   return store.dispatch.bind(store);
 }
 
 export function useGetters(store?: Store): Store["getters"] {
-  store = store || (Component.current!.env.store as Store);
+  store = store || (Component.current!.env as EnvWithStore).store;
   return store.getters;
 }

src/utils.ts

@@ -10,14 +10,16 @@
  * - debounce
  */
 
+import { browser } from "./browser";
+
 export function whenReady(fn?: any) {
-  return new Promise(function(resolve) {
+  return new Promise(function (resolve) {
     if (document.readyState !== "loading") {
       resolve();
     } else {
       document.addEventListener("DOMContentLoaded", resolve, false);
     }
-  }).then(fn || function() {});
+  }).then(fn || function () {});
 }
 
 const loadedScripts: { [key: string]: Promise<void> } = {};
@@ -26,14 +28,14 @@ export function loadJS(url: string): Promise<void> {
   if (url in loadedScripts) {
     return loadedScripts[url];
   }
-  const promise: Promise<void> = new Promise(function(resolve, reject) {
+  const promise: Promise<void> = new Promise(function (resolve, reject) {
     const script = document.createElement("script");
     script.type = "text/javascript";
     script.src = url;
-    script.onload = function() {
+    script.onload = function () {
       resolve();
     };
-    script.onerror = function() {
+    script.onerror = function () {
       reject(`Error loading file '${url}'`);
     };
     const head = document.head || document.getElementsByTagName("head")[0];
@@ -44,7 +46,7 @@ export function loadJS(url: string): Promise<void> {
 }
 
 export async function loadFile(url: string): Promise<string> {
-  const result = await fetch(url);
+  const result = await browser.fetch(url);
   if (!result.ok) {
     throw new Error("Error while fetching xml templates");
   }
@@ -73,7 +75,7 @@ export function escape(str: string | number | undefined): string {
  */
 export function debounce(func: Function, wait: number, immediate?: boolean): Function {
   let timeout;
-  return function(this: any) {
+  return function (this: any) {
     const context = this;
     const args = arguments;
     function later() {
@@ -83,8 +85,8 @@ export function debounce(func: Function, wait: number, immediate?: boolean): Fun
       }
     }
     const callNow = immediate && !timeout;
-    clearTimeout(timeout);
-    timeout = setTimeout(later, wait);
+    browser.clearTimeout(timeout);
+    timeout = browser.setTimeout(later, wait);
     if (callNow) {
       func.apply(context, args);
     }

src/vdom/html_to_vdom.ts

@@ -1,4 +1,4 @@
-import { VNode, h } from "./vdom";
+import { VNode, h, addNS } from "./vdom";
 
 const parser = new DOMParser();
 
@@ -13,6 +13,9 @@ export function htmlToVDOM(html: string): VNode[] {
 
 function htmlToVNode(node: ChildNode): VNode {
   if (!(node instanceof Element)) {
+    if (node instanceof Comment) {
+      return h("!", node.textContent);
+    }
     return { text: node.textContent! } as VNode;
   }
   const attrs = {};
@@ -23,5 +26,9 @@ function htmlToVNode(node: ChildNode): VNode {
   for (let c of node.childNodes) {
     children.push(htmlToVNode(c));
   }
-  return h((node as Element).tagName, { attrs }, children);
+  const vnode = h((node as Element).tagName, { attrs }, children);
+  if (vnode.sel === "svg") {
+    addNS(vnode.data, (vnode as any).children, vnode.sel);
+  }
+  return vnode;
 }

src/vdom/modules.ts

@@ -33,7 +33,7 @@ function updateProps(oldVnode: VNode, vnode: VNode): void {
 
 export const propsModule = {
   create: updateProps,
-  update: updateProps
+  update: updateProps,
 } as Module;
 
 //------------------------------------------------------------------------------
@@ -151,7 +151,7 @@ function updateEventListeners(oldVnode: VNode, vnode?: VNode): void {
 export const eventListenersModule = {
   create: updateEventListeners,
   update: updateEventListeners,
-  destroy: updateEventListeners
+  destroy: updateEventListeners,
 } as Module;
 
 //------------------------------------------------------------------------------
@@ -210,7 +210,7 @@ function updateAttrs(oldVnode: VNode, vnode: VNode): void {
 
 export const attrsModule = {
   create: updateAttrs,
-  update: updateAttrs
+  update: updateAttrs,
 } as Module;
 
 //------------------------------------------------------------------------------

src/vdom/vdom.ts

@@ -520,7 +520,7 @@ const htmlDomApi = {
   parentNode,
   nextSibling,
   tagName,
-  setTextContent
+  setTextContent,
 } as DOMAPI;
 
 //------------------------------------------------------------------------------

tests/animations.test.ts

@@ -1,15 +1,15 @@
 import { Component, Env } from "../src/component/component";
+import { useRef, useState } from "../src/hooks";
 import { QWeb } from "../src/qweb/index";
-import { useState, useRef } from "../src/hooks";
 import { xml } from "../src/tags";
 import {
   makeDeferred,
-  makeTestFixture,
   makeTestEnv,
+  makeTestFixture,
+  nextFrame,
   patchNextFrame,
   renderToDOM,
   unpatchNextFrame,
-  nextTick
 } from "./helpers";
 
 //------------------------------------------------------------------------------
@@ -71,7 +71,7 @@ describe("animations", () => {
     qweb.addTemplate("test", `<span t-transition="chimay">blue</span>`);
 
     let def = makeDeferred();
-    patchNextFrame(cb => {
+    patchNextFrame((cb) => {
       expect(node.className).toBe("chimay-enter chimay-enter-active");
       cb();
       expect(node.className).toBe("chimay-enter-active chimay-enter-to");
@@ -91,7 +91,7 @@ describe("animations", () => {
     qweb.addTemplate("test", `<span t-transition="chimay">blue</span>`);
 
     let def = makeDeferred();
-    patchNextFrame(cb => {
+    patchNextFrame((cb) => {
       expect(node.className).toBe("chimay-enter chimay-enter-active");
       cb();
       expect(node.className).toBe("chimay-enter-active chimay-enter-to");
@@ -112,7 +112,7 @@ describe("animations", () => {
     qweb.addTemplate("test", `<span t-transition="jupiler">blue</span>`);
 
     let def = makeDeferred();
-    patchNextFrame(cb => {
+    patchNextFrame((cb) => {
       expect(node.className).toBe("jupiler-enter jupiler-enter-active");
       cb();
       expect(node.className).toBe("");
@@ -139,7 +139,7 @@ describe("animations", () => {
     // insert widget into the DOM
     let def = makeDeferred();
     var spanNode;
-    patchNextFrame(cb => {
+    patchNextFrame((cb) => {
       expect(spanNode.className).toBe("chimay-enter chimay-enter-active");
       cb();
       expect(spanNode.className).toBe("chimay-enter-active chimay-enter-to");
@@ -155,7 +155,7 @@ describe("animations", () => {
     // remove span from the DOM
     def = makeDeferred();
     widget.state.hide = true;
-    patchNextFrame(cb => {
+    patchNextFrame((cb) => {
       expect(spanNode.className).toBe("chimay-leave chimay-leave-active");
       cb();
       expect(spanNode.className).toBe("chimay-leave-active chimay-leave-to");
@@ -182,7 +182,7 @@ describe("animations", () => {
     // insert widget into the DOM
     let def = makeDeferred();
     var spanNode;
-    patchNextFrame(cb => {
+    patchNextFrame((cb) => {
       expect(spanNode.className).toBe("chimay-enter chimay-enter-active");
       cb();
       expect(spanNode.className).toBe("chimay-enter-active chimay-enter-to");
@@ -210,7 +210,7 @@ describe("animations", () => {
 
     let def = makeDeferred();
     var spanNode;
-    patchNextFrame(cb => {
+    patchNextFrame((cb) => {
       expect(fixture.innerHTML).toBe(
         '<div><span class="chimay-enter chimay-enter-active">blue</span></div>'
       );
@@ -250,7 +250,7 @@ describe("animations", () => {
 
     let def = makeDeferred();
     var spanNode;
-    patchNextFrame(cb => {
+    patchNextFrame((cb) => {
       expect(fixture.innerHTML).toBe(
         '<div><span class="chimay-enter chimay-enter-active">blue</span></div>'
       );
@@ -275,7 +275,7 @@ describe("animations", () => {
     // remove span from the DOM
     def = makeDeferred();
     widget.state.display = false;
-    patchNextFrame(cb => {
+    patchNextFrame((cb) => {
       expect(fixture.innerHTML).toBe(
         '<div><span class="chimay-leave chimay-leave-active" data-owl-key="__3__">blue</span></div>'
       );
@@ -315,7 +315,7 @@ describe("animations", () => {
 
     let def = makeDeferred();
     let phase = "enter";
-    patchNextFrame(cb => {
+    patchNextFrame((cb) => {
       let spans = fixture.querySelectorAll("span");
       expect(spans.length).toBe(1);
       expect(spans[0].className).toBe(`chimay-${phase} chimay-${phase}-active`);
@@ -366,7 +366,7 @@ describe("animations", () => {
 
     let def = makeDeferred();
     let phase = "enter";
-    patchNextFrame(cb => {
+    patchNextFrame((cb) => {
       let spans = fixture.querySelectorAll("span");
       expect(spans.length).toBe(1);
       expect(spans[0].className).toBe(`chimay-${phase} chimay-${phase}-active`);
@@ -413,36 +413,36 @@ describe("animations", () => {
       state = useState({ flag: false });
     }
 
-    patchNextFrame(cb => cb());
+    patchNextFrame((cb) => cb());
 
     const widget = new Parent();
     await widget.mount(fixture);
 
     widget.state.flag = true;
 
-    await nextTick();
+    await nextFrame();
     widget.el!.querySelector("span")!.dispatchEvent(new Event("transitionend"));
     expect(fixture.innerHTML).toBe('<div><span class="">blue</span></div>');
     expect(QWeb.utils.transitionInsert).toBeCalledTimes(1);
 
     widget.state.flag = false;
-    await nextTick();
+    await nextFrame();
     expect(fixture.innerHTML).toBe(
       '<div><span class="chimay-leave-active chimay-leave-to" data-owl-key="__3__">blue</span></div>'
     );
     expect(QWeb.utils.transitionInsert).toBeCalledTimes(1);
 
     widget.state.flag = true;
-    await nextTick();
+    await nextFrame();
     expect(fixture.innerHTML).toBe(
       '<div><span class="chimay-enter-active chimay-enter-to" data-owl-key="__3__">blue</span></div>'
     );
     expect(QWeb.utils.transitionInsert).toBeCalledTimes(2);
 
     widget.state.flag = false;
-    await nextTick();
+    await nextFrame();
     widget.state.flag = true;
-    await nextTick();
+    await nextFrame();
 
     expect(QWeb.utils.transitionInsert).toBeCalledTimes(3);
     widget.el!.querySelector("span")!.dispatchEvent(new Event("transitionend"));

tests/component/__snapshots__/component.test.ts.snap

@@ -534,11 +534,11 @@ exports[`other directives with t-component slot setted value (with t-set) not ac
         w3.__owl__.pvnode = pvnode;
     }
     w3.__owl__.parentLastFiberId = extra.fiber.id;
-    let c5 = [], p5 = {key:5};
-    let vn5 = h('p', p5, c5);
-    c1.push(vn5);
+    let c6 = [], p6 = {key:6};
+    let vn6 = h('p', p6, c6);
+    c1.push(vn6);
     if (scope.iter != null) {
-        c5.push({text: scope.iter});
+        c6.push({text: scope.iter});
     }
     return vn1;
 }"
@@ -1253,12 +1253,16 @@ exports[`other directives with t-component t-set can't alter from within callee
     if (scope.iter != null) {
         c2.push({text: scope.iter});
     }
-    this.subTemplates['ChildWidget'].call(this, Object.assign(Object.create(context), scope), Object.assign({}, extra, {parentNode: c1, parent: utils.getComponent(context), key: '__4__'}));
-    let c5 = [], p5 = {key:5};
-    let vn5 = h('p', p5, c5);
-    c1.push(vn5);
+    let _origScope6 = scope;
+    scope = Object.create(scope);
+    scope.__access_mode__ = 'ro';
+    this.constructor.subTemplates['2'].call(this, scope, Object.assign({}, extra, {parentNode: c1, parent: utils.getComponent(context), key: '__7__'}));
+    scope = _origScope6;
+    let c8 = [], p8 = {key:8};
+    let vn8 = h('p', p8, c8);
+    c1.push(vn8);
     if (scope.iter != null) {
-        c5.push({text: scope.iter});
+        c8.push({text: scope.iter});
     }
     return vn1;
 }"
@@ -1280,22 +1284,23 @@ exports[`other directives with t-component t-set can't alter in t-call body 1`]
     if (scope.iter != null) {
         c2.push({text: scope.iter});
     }
+    let _origScope6 = scope;
+    scope = Object.create(scope);
+    scope.__access_mode__ = 'ro';
     {
-        let _origScope4 = scope;
-        scope = Object.assign(Object.create(context), scope);
         {
             let c__0 = [];
             utils.getScope(scope, 'iter').iter = 'inCall';
             scope[utils.zero] = c__0;
         }
-        this.subTemplates['ChildWidget'].call(this, scope, Object.assign({}, extra, {parentNode: c1, parent: utils.getComponent(context), key: '__5__'}));
-        scope = _origScope4;
+        this.constructor.subTemplates['2'].call(this, scope, Object.assign({}, extra, {parentNode: c1, parent: utils.getComponent(context), key: '__7__'}));
     }
-    let c6 = [], p6 = {key:6};
-    let vn6 = h('p', p6, c6);
-    c1.push(vn6);
+    scope = _origScope6;
+    let c8 = [], p8 = {key:8};
+    let vn8 = h('p', p8, c8);
+    c1.push(vn8);
     if (scope.iter != null) {
-        c6.push({text: scope.iter});
+        c8.push({text: scope.iter});
     }
     return vn1;
 }"
@@ -1400,6 +1405,47 @@ exports[`other directives with t-component t-set outside modified in t-foreach 1
 }"
 `;
 
+exports[`props evaluation  t-set with a body expression can be used as textual prop 1`] = `
+"function anonymous(context, extra
+) {
+    // Template name: \\"__template__2\\"
+    let utils = this.constructor.utils;
+    let QWeb = this.constructor;
+    let parent = context;
+    let scope = Object.create(context);
+    let h = this.h;
+    let c1 = [], p1 = {key:1};
+    let vn1 = h('div', p1, c1);
+    let c2 = new utils.VDomArray();
+    c2.push({text: \`42\`});
+    scope.abc = c2
+    // Component 'Child'
+    let w3 = '__4__' in parent.__owl__.cmap ? parent.__owl__.children[parent.__owl__.cmap['__4__']] : false;
+    let props3 = {val:scope.abc};
+    if (w3 && w3.__owl__.currentFiber && !w3.__owl__.vnode) {
+        w3.destroy();
+        w3 = false;
+    }
+    if (w3) {
+        w3.__updateProps(props3, extra.fiber, undefined);
+        let pvnode = w3.__owl__.pvnode;
+        c1.push(pvnode);
+    } else {
+        let componentKey3 = \`Child\`;
+        let W3 = context.constructor.components[componentKey3] || QWeb.components[componentKey3]|| scope['Child'];
+        if (!W3) {throw new Error('Cannot find the definition of component \\"' + componentKey3 + '\\"')}
+        w3 = new W3(parent, props3);
+        parent.__owl__.cmap['__4__'] = w3.__owl__.id;
+        let fiber = w3.__prepare(extra.fiber, undefined, () => { const vnode = fiber.vnode; pvnode.sel = vnode.sel; });
+        let pvnode = h('dummy', {key: '__4__', hook: {remove() {},destroy(vn) {w3.destroy();}}});
+        c1.push(pvnode);
+        w3.__owl__.pvnode = pvnode;
+    }
+    w3.__owl__.parentLastFiberId = extra.fiber.id;
+    return vn1;
+}"
+`;
+
 exports[`random stuff/miscellaneous can inject values in tagged templates 1`] = `
 "function anonymous(context, extra
 ) {
@@ -1409,7 +1455,11 @@ exports[`random stuff/miscellaneous can inject values in tagged templates 1`] =
     let h = this.h;
     let c1 = [], p1 = {key:1};
     let vn1 = h('div', p1, c1);
-    this.subTemplates['__template__1'].call(this, Object.assign(Object.create(context), scope), Object.assign({}, extra, {parentNode: c1, parent: utils.getComponent(context), key: '__4__'}));
+    let _origScope5 = scope;
+    scope = Object.create(scope);
+    scope.__access_mode__ = 'ro';
+    this.constructor.subTemplates['3'].call(this, scope, Object.assign({}, extra, {parentNode: c1, parent: utils.getComponent(context), key: '__6__'}));
+    scope = _origScope5;
     return vn1;
 }"
 `;
@@ -1524,15 +1574,15 @@ exports[`t-call handlers are properly bound through a t-call 1`] = `
     // Template name: \\"sub\\"
     let utils = this.constructor.utils;
     let h = this.h;
-    let c1 = extra.parentNode;
+    let c2 = extra.parentNode;
     let key0 = extra.key || \\"\\";
-    let c2 = [], p2 = {key:\`\${key0}_2\`,on:{}};
-    let vn2 = h('p', p2, c2);
-    c1.push(vn2);
-    let k3 = \`click__3__\${key0}__\`;
-    extra.handlers[k3] = extra.handlers[k3] || function (e) {if (!context.__owl__.isMounted){return}utils.getComponent(context)['update'](e);};
-    p2.on['click'] = extra.handlers[k3];
-    c2.push({text: \`lucas\`});
+    let c3 = [], p3 = {key:\`\${key0}_3\`,on:{}};
+    let vn3 = h('p', p3, c3);
+    c2.push(vn3);
+    let k4 = \`click__4__\${key0}__\`;
+    extra.handlers[k4] = extra.handlers[k4] || function (e) {if (!context.__owl__.isMounted){return}utils.getComponent(context)['update'](e);};
+    p3.on['click'] = extra.handlers[k4];
+    c3.push({text: \`lucas\`});
 }"
 `;
 
@@ -1543,14 +1593,14 @@ exports[`t-call handlers with arguments are properly bound through a t-call 1`]
     let utils = this.constructor.utils;
     let scope = Object.create(context);
     let h = this.h;
-    let c1 = extra.parentNode;
+    let c2 = extra.parentNode;
     let key0 = extra.key || \\"\\";
-    let c2 = [], p2 = {key:\`\${key0}_2\`,on:{}};
-    let vn2 = h('p', p2, c2);
-    c1.push(vn2);
-    let args3 = [scope['a']];
-    p2.on['click'] = function (e) {if (!context.__owl__.isMounted){return}utils.getComponent(context)['update'](...args3, e);};
-    c2.push({text: \`lucas\`});
+    let c3 = [], p3 = {key:\`\${key0}_3\`,on:{}};
+    let vn3 = h('p', p3, c3);
+    c2.push(vn3);
+    let args4 = [scope['a']];
+    p3.on['click'] = function (e) {if (!context.__owl__.isMounted){return}utils.getComponent(context)['update'](...args4, e);};
+    c3.push({text: \`lucas\`});
 }"
 `;
 
@@ -1563,32 +1613,32 @@ exports[`t-call parent is set within t-call 1`] = `
     let parent = extra.parent;
     let scope = Object.create(context);
     let h = this.h;
-    let c1 = extra.parentNode;
+    let c2 = extra.parentNode;
     let key0 = extra.key || \\"\\";
     // Component 'Child'
-    let k3 = \`__3__\${key0}__\`;
-    let w2 = k3 in parent.__owl__.cmap ? parent.__owl__.children[parent.__owl__.cmap[k3]] : false;
-    let props2 = {};
-    if (w2 && w2.__owl__.currentFiber && !w2.__owl__.vnode) {
-        w2.destroy();
-        w2 = false;
+    let k4 = \`__4__\${key0}__\`;
+    let w3 = k4 in parent.__owl__.cmap ? parent.__owl__.children[parent.__owl__.cmap[k4]] : false;
+    let props3 = {};
+    if (w3 && w3.__owl__.currentFiber && !w3.__owl__.vnode) {
+        w3.destroy();
+        w3 = false;
     }
-    if (w2) {
-        w2.__updateProps(props2, extra.fiber, undefined);
-        let pvnode = w2.__owl__.pvnode;
-        c1.push(pvnode);
+    if (w3) {
+        w3.__updateProps(props3, extra.fiber, undefined);
+        let pvnode = w3.__owl__.pvnode;
+        c2.push(pvnode);
     } else {
-        let componentKey2 = \`Child\`;
-        let W2 = context.constructor.components[componentKey2] || QWeb.components[componentKey2]|| scope['Child'];
-        if (!W2) {throw new Error('Cannot find the definition of component \\"' + componentKey2 + '\\"')}
-        w2 = new W2(parent, props2);
-        parent.__owl__.cmap[k3] = w2.__owl__.id;
-        let fiber = w2.__prepare(extra.fiber, undefined, () => { const vnode = fiber.vnode; pvnode.sel = vnode.sel; });
-        let pvnode = h('dummy', {key: k3, hook: {remove() {},destroy(vn) {w2.destroy();}}});
-        c1.push(pvnode);
-        w2.__owl__.pvnode = pvnode;
+        let componentKey3 = \`Child\`;
+        let W3 = context.constructor.components[componentKey3] || QWeb.components[componentKey3]|| scope['Child'];
+        if (!W3) {throw new Error('Cannot find the definition of component \\"' + componentKey3 + '\\"')}
+        w3 = new W3(parent, props3);
+        parent.__owl__.cmap[k4] = w3.__owl__.id;
+        let fiber = w3.__prepare(extra.fiber, undefined, () => { const vnode = fiber.vnode; pvnode.sel = vnode.sel; });
+        let pvnode = h('dummy', {key: k4, hook: {remove() {},destroy(vn) {w3.destroy();}}});
+        c2.push(pvnode);
+        w3.__owl__.pvnode = pvnode;
     }
-    w2.__owl__.parentLastFiberId = extra.fiber.id;
+    w3.__owl__.parentLastFiberId = extra.fiber.id;
 }"
 `;
 
@@ -1682,6 +1732,33 @@ exports[`t-model directive basic use, on an input 1`] = `
 }"
 `;
 
+exports[`t-model directive basic use, on an input with bracket expression 1`] = `
+"function anonymous(context, extra
+) {
+    // Template name: \\"__template__1\\"
+    let scope = Object.create(context);
+    let h = this.h;
+    let c1 = [], p1 = {key:1};
+    let vn1 = h('div', p1, c1);
+    let c2 = [], p2 = {key:2,on:{}};
+    let vn2 = h('input', p2, c2);
+    c1.push(vn2);
+    let expr2 = scope['state'];
+    let exprKey2 = 'text';
+    p2.props = {value: expr2[exprKey2]};
+    extra.handlers['__3__'] = extra.handlers['__3__'] || ((ev) => {expr2[exprKey2] = ev.target.value});
+    p2.on['input'] = extra.handlers['__3__'];
+    let c4 = [], p4 = {key:4};
+    let vn4 = h('span', p4, c4);
+    c1.push(vn4);
+    let _5 = scope['state'].text;
+    if (_5 != null) {
+        c4.push({text: _5});
+    }
+    return vn1;
+}"
+`;
+
 exports[`t-model directive basic use, on another key in component 1`] = `
 "function anonymous(context, extra
 ) {
@@ -1748,6 +1825,46 @@ exports[`t-model directive in a t-foreach 1`] = `
 }"
 `;
 
+exports[`t-model directive in a t-foreach, part 2 1`] = `
+"function anonymous(context, extra
+) {
+    // Template name: \\"__template__1\\"
+    let scope = Object.create(context);
+    let h = this.h;
+    let c1 = [], p1 = {key:1};
+    let vn1 = h('div', p1, c1);
+    let _2 = scope['state'];
+    if (!_2) { throw new Error('QWeb error: Invalid loop expression')}
+    let _3 = _4 = _2;
+    if (!(_2 instanceof Array)) {
+        _3 = Object.keys(_2);
+        _4 = Object.values(_2);
+    }
+    let _length3 = _3.length;
+    let _origScope5 = scope;
+    scope = Object.create(scope);
+    for (let i1 = 0; i1 < _length3; i1++) {
+        scope.thing_first = i1 === 0
+        scope.thing_last = i1 === _length3 - 1
+        scope.thing_index = i1
+        scope.thing = _3[i1]
+        scope.thing_value = _4[i1]
+        let key1 = scope['thing_index'];
+        let c6 = [], p6 = {key:\`\${key1}_6\`,on:{}};
+        let vn6 = h('input', p6, c6);
+        c1.push(vn6);
+        let expr6 = scope['state'];
+        let exprKey6 = scope['thing_index'];
+        let k7 = \`__7__\${key1}__\`;
+        p6.props = {value: expr6[exprKey6]};
+        extra.handlers[k7] = extra.handlers[k7] || ((ev) => {expr6[exprKey6] = ev.target.value});
+        p6.on['input'] = extra.handlers[k7];
+    }
+    scope = _origScope5;
+    return vn1;
+}"
+`;
+
 exports[`t-model directive on a select 1`] = `
 "function anonymous(context, extra
 ) {
@@ -1832,7 +1949,7 @@ exports[`t-model directive on an input type=radio 1`] = `
     let _2 = 'radio';
     let _3 = 'one';
     let _4 = 'One';
-    let c5 = [], p5 = {key:5,attrs:{type: _2,id: _3,value: _4},on:{}};
+    let c5 = [], p5 = {key:5,attrs:{type: _2,id: _3,value: _4},props:{value: _4},on:{}};
     let vn5 = h('input', p5, c5);
     c1.push(vn5);
     let expr5 = scope['state'];
@@ -1842,7 +1959,7 @@ exports[`t-model directive on an input type=radio 1`] = `
     let _7 = 'radio';
     let _8 = 'two';
     let _9 = 'Two';
-    let c10 = [], p10 = {key:10,attrs:{type: _7,id: _8,value: _9},on:{}};
+    let c10 = [], p10 = {key:10,attrs:{type: _7,id: _8,value: _9},props:{value: _9},on:{}};
     let vn10 = h('input', p10, c10);
     c1.push(vn10);
     let expr10 = scope['state'];

tests/component/__snapshots__/slots.test.ts.snap

@@ -44,23 +44,23 @@ exports[`t-slot directive can define and call slots 2`] = `
 ) {
     // Template name: \\"Dialog\\"
     let h = this.h;
-    let c6 = [], p6 = {key:6};
-    let vn6 = h('div', p6, c6);
-    let c7 = [], p7 = {key:7};
-    let vn7 = h('div', p7, c7);
-    c6.push(vn7);
-    const slot8 = this.constructor.slots[context.__owl__.slotId + '_' + 'header'];
-    if (slot8) {
-        slot8.call(this, context.__owl__.scope, Object.assign({}, extra, {parentNode: c7, parent: extra.parent || context}));
-    }
     let c9 = [], p9 = {key:9};
     let vn9 = h('div', p9, c9);
-    c6.push(vn9);
-    const slot10 = this.constructor.slots[context.__owl__.slotId + '_' + 'footer'];
-    if (slot10) {
-        slot10.call(this, context.__owl__.scope, Object.assign({}, extra, {parentNode: c9, parent: extra.parent || context}));
+    let c10 = [], p10 = {key:10};
+    let vn10 = h('div', p10, c10);
+    c9.push(vn10);
+    const slot11 = this.constructor.slots[context.__owl__.slotId + '_' + 'header'];
+    if (slot11) {
+        slot11.call(this, context.__owl__.scope, Object.assign({}, extra, {parentNode: c10, parent: extra.parent || context}));
     }
-    return vn6;
+    let c12 = [], p12 = {key:12};
+    let vn12 = h('div', p12, c12);
+    c9.push(vn12);
+    const slot13 = this.constructor.slots[context.__owl__.slotId + '_' + 'footer'];
+    if (slot13) {
+        slot13.call(this, context.__owl__.scope, Object.assign({}, extra, {parentNode: c12, parent: extra.parent || context}));
+    }
+    return vn9;
 }"
 `;
 
@@ -69,11 +69,11 @@ exports[`t-slot directive can define and call slots 3`] = `
 ) {
     // Template name: \\"slot_header_template\\"
     let h = this.h;
-    let c1 = extra.parentNode;
-    let c4 = [], p4 = {key:4};
-    let vn4 = h('span', p4, c4);
-    c1.push(vn4);
-    c4.push({text: \`header\`});
+    let c4 = extra.parentNode;
+    let c5 = [], p5 = {key:5};
+    let vn5 = h('span', p5, c5);
+    c4.push(vn5);
+    c5.push({text: \`header\`});
 }"
 `;
 
@@ -82,11 +82,101 @@ exports[`t-slot directive can define and call slots 4`] = `
 ) {
     // Template name: \\"slot_footer_template\\"
     let h = this.h;
-    let c1 = extra.parentNode;
+    let c6 = extra.parentNode;
+    let c7 = [], p7 = {key:7};
+    let vn7 = h('span', p7, c7);
+    c6.push(vn7);
+    c7.push({text: \`footer\`});
+}"
+`;
+
+exports[`t-slot directive can define and call slots using old t-set keyword 1`] = `
+"function anonymous(context, extra
+) {
+    // Template name: \\"__template__2\\"
+    let utils = this.constructor.utils;
+    let QWeb = this.constructor;
+    let parent = context;
+    let scope = Object.create(context);
+    let h = this.h;
+    let c1 = [], p1 = {key:1};
+    let vn1 = h('div', p1, c1);
+    // Component 'Dialog'
+    let w2 = '__3__' in parent.__owl__.cmap ? parent.__owl__.children[parent.__owl__.cmap['__3__']] : false;
+    let props2 = {};
+    if (w2 && w2.__owl__.currentFiber && !w2.__owl__.vnode) {
+        w2.destroy();
+        w2 = false;
+    }
+    if (w2) {
+        w2.__updateProps(props2, extra.fiber, Object.assign(Object.create(context), scope));
+        let pvnode = w2.__owl__.pvnode;
+        c1.push(pvnode);
+    } else {
+        let componentKey2 = \`Dialog\`;
+        let W2 = context.constructor.components[componentKey2] || QWeb.components[componentKey2]|| scope['Dialog'];
+        if (!W2) {throw new Error('Cannot find the definition of component \\"' + componentKey2 + '\\"')}
+        w2 = new W2(parent, props2);
+        parent.__owl__.cmap['__3__'] = w2.__owl__.id;
+        w2.__owl__.slotId = 1;
+        let fiber = w2.__prepare(extra.fiber, Object.assign(Object.create(context), scope), () => { const vnode = fiber.vnode; pvnode.sel = vnode.sel; });
+        let pvnode = h('dummy', {key: '__3__', hook: {remove() {},destroy(vn) {w2.destroy();}}});
+        c1.push(pvnode);
+        w2.__owl__.pvnode = pvnode;
+    }
+    w2.__owl__.parentLastFiberId = extra.fiber.id;
+    return vn1;
+}"
+`;
+
+exports[`t-slot directive can define and call slots using old t-set keyword 2`] = `
+"function anonymous(context, extra
+) {
+    // Template name: \\"__template__1\\"
+    let h = this.h;
+    let c9 = [], p9 = {key:9};
+    let vn9 = h('div', p9, c9);
+    let c10 = [], p10 = {key:10};
+    let vn10 = h('div', p10, c10);
+    c9.push(vn10);
+    const slot11 = this.constructor.slots[context.__owl__.slotId + '_' + 'header'];
+    if (slot11) {
+        slot11.call(this, context.__owl__.scope, Object.assign({}, extra, {parentNode: c10, parent: extra.parent || context}));
+    }
+    let c12 = [], p12 = {key:12};
+    let vn12 = h('div', p12, c12);
+    c9.push(vn12);
+    const slot13 = this.constructor.slots[context.__owl__.slotId + '_' + 'footer'];
+    if (slot13) {
+        slot13.call(this, context.__owl__.scope, Object.assign({}, extra, {parentNode: c12, parent: extra.parent || context}));
+    }
+    return vn9;
+}"
+`;
+
+exports[`t-slot directive can define and call slots using old t-set keyword 3`] = `
+"function anonymous(context, extra
+) {
+    // Template name: \\"slot_header_template\\"
+    let h = this.h;
+    let c4 = extra.parentNode;
     let c5 = [], p5 = {key:5};
     let vn5 = h('span', p5, c5);
-    c1.push(vn5);
-    c5.push({text: \`footer\`});
+    c4.push(vn5);
+    c5.push({text: \`header\`});
+}"
+`;
+
+exports[`t-slot directive can define and call slots using old t-set keyword 4`] = `
+"function anonymous(context, extra
+) {
+    // Template name: \\"slot_footer_template\\"
+    let h = this.h;
+    let c6 = extra.parentNode;
+    let c7 = [], p7 = {key:7};
+    let vn7 = h('span', p7, c7);
+    c6.push(vn7);
+    c7.push({text: \`footer\`});
 }"
 `;
 
@@ -95,11 +185,11 @@ exports[`t-slot directive content is the default slot 1`] = `
 ) {
     // Template name: \\"slot_default_template\\"
     let h = this.h;
-    let c1 = extra.parentNode;
-    let c4 = [], p4 = {key:4};
-    let vn4 = h('span', p4, c4);
-    c1.push(vn4);
-    c4.push({text: \`sts rocks\`});
+    let c4 = extra.parentNode;
+    let c5 = [], p5 = {key:5};
+    let vn5 = h('span', p5, c5);
+    c4.push(vn5);
+    c5.push({text: \`sts rocks\`});
 }"
 `;
 
@@ -125,8 +215,8 @@ exports[`t-slot directive default slot work with text nodes 1`] = `
 ) {
     // Template name: \\"slot_default_template\\"
     let h = this.h;
-    let c1 = extra.parentNode;
-    c1.push({text: \`sts rocks\`});
+    let c4 = extra.parentNode;
+    c4.push({text: \`sts rocks\`});
 }"
 `;
 
@@ -135,15 +225,15 @@ exports[`t-slot directive multiple roots are allowed in a default slot 1`] = `
 ) {
     // Template name: \\"slot_default_template\\"
     let h = this.h;
-    let c1 = extra.parentNode;
-    let c4 = [], p4 = {key:4};
-    let vn4 = h('span', p4, c4);
-    c1.push(vn4);
-    c4.push({text: \`sts\`});
+    let c4 = extra.parentNode;
     let c5 = [], p5 = {key:5};
     let vn5 = h('span', p5, c5);
-    c1.push(vn5);
-    c5.push({text: \`rocks\`});
+    c4.push(vn5);
+    c5.push({text: \`sts\`});
+    let c6 = [], p6 = {key:6};
+    let vn6 = h('span', p6, c6);
+    c4.push(vn6);
+    c6.push({text: \`rocks\`});
 }"
 `;
 
@@ -152,15 +242,15 @@ exports[`t-slot directive multiple roots are allowed in a named slot 1`] = `
 ) {
     // Template name: \\"slot_content_template\\"
     let h = this.h;
-    let c1 = extra.parentNode;
-    let c4 = [], p4 = {key:4};
-    let vn4 = h('span', p4, c4);
-    c1.push(vn4);
-    c4.push({text: \`sts\`});
+    let c4 = extra.parentNode;
     let c5 = [], p5 = {key:5};
     let vn5 = h('span', p5, c5);
-    c1.push(vn5);
-    c5.push({text: \`rocks\`});
+    c4.push(vn5);
+    c5.push({text: \`sts\`});
+    let c6 = [], p6 = {key:6};
+    let vn6 = h('span', p6, c6);
+    c4.push(vn6);
+    c6.push({text: \`rocks\`});
 }"
 `;
 
@@ -188,22 +278,22 @@ exports[`t-slot directive refs are properly bound in slots 1`] = `
     let utils = this.constructor.utils;
     context.__owl__.refs = context.__owl__.refs || {};
     let h = this.h;
-    let c1 = extra.parentNode;
-    let c8 = [], p8 = {key:8,on:{}};
-    let vn8 = h('button', p8, c8);
-    c1.push(vn8);
-    extra.handlers['click__9__'] = extra.handlers['click__9__'] || function (e) {if (!context.__owl__.isMounted){return}utils.getComponent(context)['doSomething'](e);};
-    p8.on['click'] = extra.handlers['click__9__'];
-    const ref10 = \`myButton\`;
-    p8.hook = {
+    let c8 = extra.parentNode;
+    let c9 = [], p9 = {key:9,on:{}};
+    let vn9 = h('button', p9, c9);
+    c8.push(vn9);
+    extra.handlers['click__10__'] = extra.handlers['click__10__'] || function (e) {if (!context.__owl__.isMounted){return}utils.getComponent(context)['doSomething'](e);};
+    p9.on['click'] = extra.handlers['click__10__'];
+    const ref11 = \`myButton\`;
+    p9.hook = {
       create: (_, n) => {
-        context.__owl__.refs[ref10] = n.elm;
+        context.__owl__.refs[ref11] = n.elm;
       },
       destroy: () => {
-        delete context.__owl__.refs[ref10];
+        delete context.__owl__.refs[ref11];
       },
     };
-    c8.push({text: \`do something\`});
+    c9.push({text: \`do something\`});
 }"
 `;
 
@@ -213,13 +303,13 @@ exports[`t-slot directive slots are rendered with proper context 1`] = `
     // Template name: \\"slot_footer_template\\"
     let utils = this.constructor.utils;
     let h = this.h;
-    let c1 = extra.parentNode;
-    let c8 = [], p8 = {key:8,on:{}};
-    let vn8 = h('button', p8, c8);
-    c1.push(vn8);
-    extra.handlers['click__9__'] = extra.handlers['click__9__'] || function (e) {if (!context.__owl__.isMounted){return}utils.getComponent(context)['doSomething'](e);};
-    p8.on['click'] = extra.handlers['click__9__'];
-    c8.push({text: \`do something\`});
+    let c8 = extra.parentNode;
+    let c9 = [], p9 = {key:9,on:{}};
+    let vn9 = h('button', p9, c9);
+    c8.push(vn9);
+    extra.handlers['click__10__'] = extra.handlers['click__10__'] || function (e) {if (!context.__owl__.isMounted){return}utils.getComponent(context)['doSomething'](e);};
+    p9.on['click'] = extra.handlers['click__10__'];
+    c9.push({text: \`do something\`});
 }"
 `;
 
@@ -229,14 +319,14 @@ exports[`t-slot directive slots are rendered with proper context, part 2 1`] = `
     // Template name: \\"Link\\"
     let scope = Object.create(context);
     let h = this.h;
-    let _11 = scope['props'].to;
-    let c12 = [], p12 = {key:12,attrs:{href: _11}};
-    let vn12 = h('a', p12, c12);
-    const slot13 = this.constructor.slots[context.__owl__.slotId + '_' + 'default'];
-    if (slot13) {
-        slot13.call(this, context.__owl__.scope, Object.assign({}, extra, {parentNode: c12, parent: extra.parent || context}));
+    let _12 = scope['props'].to;
+    let c13 = [], p13 = {key:13,attrs:{href: _12}};
+    let vn13 = h('a', p13, c13);
+    const slot14 = this.constructor.slots[context.__owl__.slotId + '_' + 'default'];
+    if (slot14) {
+        slot14.call(this, context.__owl__.scope, Object.assign({}, extra, {parentNode: c13, parent: extra.parent || context}));
     }
-    return vn12;
+    return vn13;
 }"
 `;
 
@@ -311,11 +401,11 @@ exports[`t-slot directive slots are rendered with proper context, part 2 3`] = `
     // Template name: \\"slot_default_template\\"
     let scope = Object.create(context);
     let h = this.h;
-    let c7 = extra.parentNode;
-    c7.push({text: \`User \`});
-    let _10 = scope['user'].name;
-    if (_10 != null) {
-        c7.push({text: _10});
+    let c10 = extra.parentNode;
+    c10.push({text: \`User \`});
+    let _11 = scope['user'].name;
+    if (_11 != null) {
+        c10.push({text: _11});
     }
 }"
 `;
@@ -326,14 +416,14 @@ exports[`t-slot directive slots are rendered with proper context, part 3 1`] = `
     // Template name: \\"Link\\"
     let scope = Object.create(context);
     let h = this.h;
-    let _10 = scope['props'].to;
-    let c11 = [], p11 = {key:11,attrs:{href: _10}};
-    let vn11 = h('a', p11, c11);
-    const slot12 = this.constructor.slots[context.__owl__.slotId + '_' + 'default'];
-    if (slot12) {
-        slot12.call(this, context.__owl__.scope, Object.assign({}, extra, {parentNode: c11, parent: extra.parent || context}));
+    let _12 = scope['props'].to;
+    let c13 = [], p13 = {key:13,attrs:{href: _12}};
+    let vn13 = h('a', p13, c13);
+    const slot14 = this.constructor.slots[context.__owl__.slotId + '_' + 'default'];
+    if (slot14) {
+        slot14.call(this, context.__owl__.scope, Object.assign({}, extra, {parentNode: c13, parent: extra.parent || context}));
     }
-    return vn11;
+    return vn13;
 }"
 `;
 
@@ -409,9 +499,10 @@ exports[`t-slot directive slots are rendered with proper context, part 3 3`] = `
     // Template name: \\"slot_default_template\\"
     let scope = Object.create(context);
     let h = this.h;
-    let c7 = extra.parentNode;
-    if (scope.userdescr != null) {
-        c7.push({text: scope.userdescr});
+    let c10 = extra.parentNode;
+    let _11 = scope['userdescr'];
+    if (_11 != null) {
+        c10.push({text: _11});
     }
 }"
 `;
@@ -462,13 +553,29 @@ exports[`t-slot directive slots are rendered with proper context, part 4 2`] = `
     // Template name: \\"slot_default_template\\"
     let scope = Object.create(context);
     let h = this.h;
-    let c1 = extra.parentNode;
-    if (scope.userdescr != null) {
-        c1.push({text: scope.userdescr});
+    let c4 = extra.parentNode;
+    let _5 = scope['userdescr'];
+    if (_5 != null) {
+        c4.push({text: _5});
     }
 }"
 `;
 
+exports[`t-slot directive t-set t-value in a slot 1`] = `
+"function anonymous(context, extra
+) {
+    // Template name: \\"__template__1\\"
+    let h = this.h;
+    let c5 = [], p5 = {key:5};
+    let vn5 = h('span', p5, c5);
+    const slot6 = this.constructor.slots[context.__owl__.slotId + '_' + 'default'];
+    if (slot6) {
+        slot6.call(this, context.__owl__.scope, Object.assign({}, extra, {parentNode: c5, parent: extra.parent || context}));
+    }
+    return vn5;
+}"
+`;
+
 exports[`t-slot directive template can just return a slot 1`] = `
 "function anonymous(context, extra
 ) {
@@ -476,12 +583,12 @@ exports[`t-slot directive template can just return a slot 1`] = `
     let utils = this.constructor.utils;
     let result;
     let h = this.h;
-    const slot6 = this.constructor.slots[context.__owl__.slotId + '_' + 'default'];
-    if (slot6) {
-        let children7= []
+    const slot7 = this.constructor.slots[context.__owl__.slotId + '_' + 'default'];
+    if (slot7) {
+        let children8= []
         result = {}
-        slot6.call(this, context.__owl__.scope, Object.assign({}, extra, {parentNode: children7, parent: extra.parent || context}));
-        utils.defineProxy(result, children7[0]);
+        slot7.call(this, context.__owl__.scope, Object.assign({}, extra, {parentNode: children8, parent: extra.parent || context}));
+        utils.defineProxy(result, children8[0]);
     }
     return result;
 }"

tests/component/async.test.ts

@@ -27,7 +27,7 @@ afterEach(() => {
 
 function children(w: Component): Component[] {
   const childrenMap = w.__owl__.children;
-  return Object.keys(childrenMap).map(id => childrenMap[id]);
+  return Object.keys(childrenMap).map((id) => childrenMap[id]);
 }
 
 describe("async rendering", () => {
@@ -404,7 +404,7 @@ describe("async rendering", () => {
     }
     class ChildB extends Component {
       willStart(): any {
-        return new Promise(function() {});
+        return new Promise(function () {});
       }
     }
     class Parent extends Component {
@@ -1366,6 +1366,28 @@ describe("async rendering", () => {
     await prom;
   });
 
+  test("concurrent renderings scenario 17", async () => {
+    class Parent extends Component {
+      static template = xml`<span><t t-esc="state.value"/></span>`;
+      state = useState({ value: 1 });
+    }
+
+    const parent = new Parent();
+    await parent.mount(fixture);
+    expect(fixture.innerHTML).toBe("<span>1</span>");
+
+    parent.state.value = 2;
+    parent.__owl__.currentFiber!.cancel();
+
+    parent.state.value = 3; // update value directly
+    await nextTick();
+    expect(fixture.innerHTML).toBe("<span>3</span>");
+
+    parent.state.value = 4; // update value after a tick
+    await nextTick();
+    expect(fixture.innerHTML).toBe("<span>4</span>");
+  });
+
   test("change state and call manually render: no unnecessary rendering", async () => {
     class Widget extends Component {
       static template = xml`<div><t t-esc="state.val"/></div>`;

tests/component/component.test.ts

@@ -1,16 +1,16 @@
 import { Component, Env } from "../../src/component/component";
+import { EventBus } from "../../src/core/event_bus";
+import { useRef, useState } from "../../src/hooks";
 import { QWeb } from "../../src/qweb/qweb";
 import { xml } from "../../src/tags";
-import { useState, useRef } from "../../src/hooks";
-import { EventBus } from "../../src/core/event_bus";
 import {
+  editInput,
   makeDeferred,
-  makeTestFixture,
   makeTestEnv,
+  makeTestFixture,
   nextMicroTick,
   nextTick,
   normalize,
-  editInput
 } from "../helpers";
 
 //------------------------------------------------------------------------------
@@ -39,7 +39,7 @@ afterEach(() => {
 
 function children(w: Component): Component[] {
   const childrenMap = w.__owl__.children;
-  return Object.keys(childrenMap).map(id => childrenMap[id]);
+  return Object.keys(childrenMap).map((id) => childrenMap[id]);
 }
 
 // Test components
@@ -133,7 +133,7 @@ describe("basic widget properties", () => {
       static template = xml`
       <div><t t-esc="state.counter"/><button t-on-click="state.counter++">Inc</button></div>`;
       state = useState({
-        counter: 0
+        counter: 0,
       });
     }
 
@@ -167,7 +167,7 @@ describe("basic widget properties", () => {
       static template = xml`
       <div><t t-esc="state.counter"/><button t-on-click="state.counter++">Inc</button></div>`;
       state = useState({
-        counter: 0
+        counter: 0,
       });
     }
 
@@ -537,7 +537,7 @@ describe("lifecycle hooks", () => {
       "child:mounted",
       "parent:willUnmount",
       "child:willUnmount",
-      "childchild:willUnmount"
+      "childchild:willUnmount",
     ]);
   });
 
@@ -589,7 +589,7 @@ describe("lifecycle hooks", () => {
       "childchild:willPatch",
       "childchild:patched",
       "child:patched",
-      "parent:patched"
+      "parent:patched",
     ]);
   });
 
@@ -782,7 +782,7 @@ describe("lifecycle hooks", () => {
       "c mounted",
       "p mounted",
       "p willunmount",
-      "c willunmount"
+      "c willunmount",
     ]);
   });
 
@@ -960,7 +960,7 @@ describe("lifecycle hooks", () => {
       "parent:willPatch",
       "child:willPatch",
       "child:patched",
-      "parent:patched"
+      "parent:patched",
     ]);
   });
 });
@@ -1134,7 +1134,7 @@ describe("composition", () => {
     class App extends Component {
       static template = xml`<t t-component="myComponent" t-key="state.child"/>`;
       state = useState({
-        child: "a"
+        child: "a",
       });
       get myComponent() {
         return this.state.child === "a" ? A : B;
@@ -1158,7 +1158,7 @@ describe("composition", () => {
     class App extends Component {
       static template = xml`<t t-component="myComponent" t-key="state.child"/>`;
       state = useState({
-        child: "a"
+        child: "a",
       });
       get myComponent() {
         return this.state.child === "a" ? A : B;
@@ -1228,7 +1228,7 @@ describe("composition", () => {
       static template = xml`
       <div><t t-esc="state.counter"/><button t-on-click="state.counter++">Inc</button></div>`;
       state = useState({
-        counter: 0
+        counter: 0,
       });
     }
 
@@ -1327,7 +1327,7 @@ describe("composition", () => {
       static template = xml`
       <div><t t-esc="state.counter"/><button t-on-click="state.counter++">Inc</button></div>`;
       state = useState({
-        counter: 0
+        counter: 0,
       });
     }
 
@@ -1350,7 +1350,7 @@ describe("composition", () => {
       static template = xml`
       <div><t t-esc="state.counter"/><button t-on-click="state.counter++">Inc</button></div>`;
       state = useState({
-        counter: 0
+        counter: 0,
       });
     }
 
@@ -1389,7 +1389,7 @@ describe("composition", () => {
     );
     class Parent extends Component {
       state = useState({
-        numbers: [1, 2, 3]
+        numbers: [1, 2, 3],
       });
       static components = { ChildWidget };
     }
@@ -1429,7 +1429,7 @@ describe("composition", () => {
     class Parent extends Component {
       static template = "parent";
       state = useState({
-        numbers: [1, 2, 3]
+        numbers: [1, 2, 3],
       });
       static components = { ChildWidget };
     }
@@ -1513,8 +1513,8 @@ describe("composition", () => {
         blips: [
           { a: "a", id: 1 },
           { b: "b", id: 2 },
-          { c: "c", id: 4 }
-        ]
+          { c: "c", id: 4 },
+        ],
       });
     }
     const parent = new Parent();
@@ -1621,8 +1621,8 @@ describe("composition", () => {
         records: [
           { id: 1, val: 1 },
           { id: 2, val: 2 },
-          { id: 3, val: 3 }
-        ]
+          { id: 3, val: 3 },
+        ],
       });
       static components = { ChildWidget };
     }
@@ -1725,6 +1725,47 @@ describe("props evaluation ", () => {
     await widget.mount(fixture);
     expect(normalize(fixture.innerHTML)).toBe("<div><span>42</span></div>");
   });
+
+  test("t-set with a body expression can be used as textual prop", async () => {
+    class Child extends Component {
+      static template = xml`<span t-esc="props.val"/>`;
+    }
+    class Parent extends Component {
+      static components = { Child };
+      static template = xml`
+        <div>
+          <t t-set="abc">42</t>
+          <Child val="abc"/>
+        </div>`;
+    }
+
+    const widget = new Parent();
+    await widget.mount(fixture);
+    expect(fixture.innerHTML).toBe("<div><span>42</span></div>");
+    expect(env.qweb.templates[Parent.template].fn.toString()).toMatchSnapshot();
+  });
+
+  test("t-set with a body expression can be passed in props, and then t-raw", async () => {
+    class Child extends Component {
+      static template = xml`
+        <span>
+          <t t-esc="props.val"/>
+          <t t-raw="props.val"/>
+        </span>`;
+    }
+    class Parent extends Component {
+      static components = { Child };
+      static template = xml`
+        <div>
+          <t t-set="abc"><p>43</p></t>
+          <Child val="abc"/>
+        </div>`;
+    }
+
+    const widget = new Parent();
+    await widget.mount(fixture);
+    expect(fixture.innerHTML).toBe("<div><span>&lt;p&gt;4343&lt;/p&gt;<p>43</p></span></div>");
+  });
 });
 
 describe("other directives with t-component", () => {
@@ -2003,7 +2044,7 @@ describe("other directives with t-component", () => {
     }
     const widget = new ParentWidget();
     await widget.mount(fixture);
-    (<HTMLElement>fixture).addEventListener("ev", function(e) {
+    (<HTMLElement>fixture).addEventListener("ev", function (e) {
       steps.push(e.defaultPrevented);
     });
 
@@ -2038,7 +2079,7 @@ describe("other directives with t-component", () => {
     }
     const widget = new ParentWidget();
     await widget.mount(fixture);
-    (<HTMLElement>fixture).addEventListener("ev", function(e) {
+    (<HTMLElement>fixture).addEventListener("ev", function (e) {
       steps.push(e.defaultPrevented);
     });
 
@@ -2976,7 +3017,7 @@ describe("random stuff/miscellaneous", () => {
       "D:mounted",
       "C:mounted",
       "B:mounted",
-      "A:mounted"
+      "A:mounted",
     ]);
 
     // update
@@ -2999,7 +3040,7 @@ describe("random stuff/miscellaneous", () => {
       "E:destroy",
       "F:mounted",
       "D:patched",
-      "C:patched"
+      "C:patched",
     ]);
   });
 
@@ -3015,6 +3056,85 @@ describe("random stuff/miscellaneous", () => {
     expect(env.qweb.templates[Parent.template].fn.toString()).toMatchSnapshot();
     expect(fixture.innerHTML).toBe("<div><span>42</span></div>");
   });
+
+  test("update props of component without concrete own node", async () => {
+    class Custom extends Component {
+      static template = xml`
+        <div class="widget-subkey">
+          <t t-esc="props.key"/>__<t t-esc="props.subKey"/>
+        </div>`;
+    }
+    class Child extends Component {
+      static components = { Custom };
+      static template = xml`
+        <t t-component="Custom"
+          t-key="props.subKey"
+          key="props.key"
+          subKey="props.subKey"/>`;
+    }
+
+    class Parent extends Component {
+      static components = { Child };
+      static template = xml`
+        <div>
+          <Child t-key="childProps.key" t-props="childProps"/>
+        </div>`;
+      childProps = {
+        key: 1,
+        subKey: 1,
+      };
+    }
+    const parent = new Parent(null);
+    await parent.mount(fixture);
+    expect(fixture.textContent!.trim()).toBe("1__1");
+
+    // First step: change the Custom's instance
+    Object.assign(parent.childProps, {
+      subKey: 2,
+    });
+    parent.render();
+    await nextTick();
+    expect(fixture.textContent!.trim()).toBe("1__2");
+
+    // Second step, change both Child's and Custom's instance
+    Object.assign(parent.childProps, {
+      key: 2,
+      subKey: 3,
+    });
+    parent.render();
+    await nextTick();
+    expect(fixture.textContent!.trim()).toBe("2__3");
+  });
+
+  test("two renderings initiated between willPatch and patched", async () => {
+    let app;
+
+    class Panel extends Component {
+      static template = xml`<abc><t t-esc="props.val"/></abc>`;
+      mounted() {
+        app.render();
+      }
+      willUnmount() {
+        app.render();
+      }
+    }
+
+    // Main root component
+    class App extends Component {
+      static components = { Panel };
+      static template = xml`<div><Panel t-key="'panel_' + state.panel" val="state.panel"/></div>`;
+
+      state = useState({ panel: "Panel1" });
+    }
+
+    app = new App();
+    await app.mount(fixture);
+
+    expect(fixture.innerHTML).toBe("<div><abc>Panel1</abc></div>");
+    app.state.panel = "Panel2";
+    await nextTick();
+    expect(fixture.innerHTML).toBe("<div><abc>Panel2</abc></div>");
+  });
 });
 
 describe("widget and observable state", () => {
@@ -3080,6 +3200,15 @@ describe("can deduce template from name", () => {
     expect(fixture.innerHTML).toBe("<span>Orval</span>");
   });
 
+  test("can find template of anonymous component", async () => {
+    class ABC extends Component {}
+    const Anonymous = class extends ABC {};
+    env.qweb.addTemplate("ABC", "<span>Orval</span>");
+    const def = new Anonymous();
+    await def.mount(fixture);
+    expect(fixture.innerHTML).toBe("<span>Orval</span>");
+  });
+
   test("can find template of parent component, defined by template key", async () => {
     class ABC extends Component {
       static template = "Achel";
@@ -3129,6 +3258,46 @@ describe("t-model directive", () => {
     expect(env.qweb.templates[SomeComponent.template].fn.toString()).toMatchSnapshot();
   });
 
+  test("basic use, on an input with bracket expression", async () => {
+    class SomeComponent extends Component {
+      static template = xml`
+        <div>
+          <input t-model="state['text']"/>
+          <span><t t-esc="state.text"/></span>
+        </div>`;
+      state = useState({ text: "" });
+    }
+    const comp = new SomeComponent();
+    await comp.mount(fixture);
+
+    expect(fixture.innerHTML).toBe("<div><input><span></span></div>");
+
+    const input = fixture.querySelector("input")!;
+    await editInput(input, "test");
+    expect(comp.state.text).toBe("test");
+    expect(fixture.innerHTML).toBe("<div><input><span>test</span></div>");
+    expect(env.qweb.templates[SomeComponent.template].fn.toString()).toMatchSnapshot();
+  });
+
+  test("throws if invalid expression", async () => {
+    class SomeComponent extends Component {
+      static template = xml`
+        <div>
+          <input t-model="state"/>
+        </div>`;
+      state = useState({ text: "" });
+    }
+    const comp = new SomeComponent();
+    let error;
+    try {
+      await comp.mount(fixture);
+    } catch (e) {
+      error = e;
+    }
+    expect(error).toBeDefined();
+    expect(error.message).toBe(`Invalid t-model expression: "state" (it should be assignable)`);
+  });
+
   test("basic use, on another key in component", async () => {
     env.qweb.addTemplates(`
     <templates>
@@ -3401,7 +3570,7 @@ describe("t-model directive", () => {
       state = useState([
         { f: false, id: 1 },
         { f: false, id: 2 },
-        { f: false, id: 3 }
+        { f: false, id: 3 },
       ]);
     }
     const comp = new SomeComponent();
@@ -3418,6 +3587,28 @@ describe("t-model directive", () => {
     expect(env.qweb.templates[SomeComponent.template].fn.toString()).toMatchSnapshot();
   });
 
+  test("in a t-foreach, part 2", async () => {
+    class SomeComponent extends Component {
+      static template = xml`
+        <div>
+          <t t-foreach="state" t-as="thing" t-key="thing_index" >
+            <input t-model="state[thing_index]"/>
+          </t>
+        </div>
+      `;
+      state = useState(["zuko", "iroh"]);
+    }
+    const comp = new SomeComponent();
+    await comp.mount(fixture);
+    expect(comp.state).toEqual(["zuko", "iroh"]);
+
+    const input = fixture.querySelectorAll("input")[1]!;
+    input.value = "uncle iroh";
+    input.dispatchEvent(new Event("input"));
+    expect(comp.state).toEqual(["zuko", "uncle iroh"]);
+    expect(env.qweb.templates[SomeComponent.template].fn.toString()).toMatchSnapshot();
+  });
+
   test("two inputs in a div with a t-key", async () => {
     class SomeComponent extends Component {
       static template = xml`
@@ -3446,7 +3637,7 @@ describe("environment and plugins", () => {
   let bus = new EventBus();
 
   // definition of a plugin
-  const somePlugin = env => {
+  const somePlugin = (env) => {
     env.someFlag = true;
     bus.on("some-event", null, () => {
       env.someFlag = !env.someFlag;
@@ -3475,11 +3666,14 @@ describe("environment and plugins", () => {
   });
 
   test("can define specific env for root components", async () => {
-    class App1 extends Component {
+    interface AppEnv extends Env {
+      test: number;
+    }
+    class App1 extends Component<{}, AppEnv> {
       static template = xml`<span></span>`;
     }
     App1.env = { test: 1 };
-    class App2 extends Component {
+    class App2 extends Component<{}, AppEnv> {
       static template = xml`<span></span>`;
     }
     App2.env = { test: 2 };
@@ -3813,7 +4007,9 @@ describe("t-call", () => {
 
     expect(fixture.innerHTML).toBe("<div><p>lucas</p></div>");
     fixture.querySelector("p")!.click();
-    expect(env.qweb.subTemplates["sub"].toString()).toMatchSnapshot();
+    const subId = env.qweb.subTemplates["sub"];
+    const subFn = QWeb.subTemplates[subId] as any;
+    expect(subFn.toString()).toMatchSnapshot();
   });
 
   test("parent is set within t-call", async () => {
@@ -3835,7 +4031,10 @@ describe("t-call", () => {
 
     expect(fixture.innerHTML).toBe("<div><span>lucas</span></div>");
     expect(child.__owl__.parent).toBe(parent);
-    expect(env.qweb.subTemplates["sub"].toString()).toMatchSnapshot();
+    const subId = env.qweb.subTemplates["sub"];
+    const subFn = QWeb.subTemplates[subId] as any;
+
+    expect(subFn.toString()).toMatchSnapshot();
   });
 
   test("t-call in t-foreach and children component", async () => {
@@ -3877,7 +4076,9 @@ describe("t-call", () => {
 
     expect(fixture.innerHTML).toBe("<span>lucas</span>");
     expect(child.__owl__.parent).toBe(parent);
-    expect(env.qweb.subTemplates["sub"].toString()).toMatchSnapshot();
+    const subId = env.qweb.subTemplates["sub"];
+    const subFn = QWeb.subTemplates[subId] as any;
+    expect(subFn.toString()).toMatchSnapshot();
   });
 
   test("handlers with arguments are properly bound through a t-call", async () => {
@@ -3893,7 +4094,9 @@ describe("t-call", () => {
     }
     const parent = new Parent();
     await parent.mount(fixture);
-    expect(env.qweb.subTemplates["sub"].toString()).toMatchSnapshot();
+    const subId = env.qweb.subTemplates["sub"];
+    const subFn = QWeb.subTemplates[subId] as any;
+    expect(subFn.toString()).toMatchSnapshot();
 
     fixture.querySelector("p")!.click();
   });

tests/component/props_validation.test.ts

@@ -92,7 +92,7 @@ describe("props validation", () => {
       { type: String, ok: "1", ko: 1 },
       { type: Object, ok: {}, ko: "1" },
       { type: Date, ok: new Date(), ko: "1" },
-      { type: Function, ok: () => {}, ko: "1" }
+      { type: Function, ok: () => {}, ko: "1" },
     ];
 
     let props;
@@ -149,7 +149,7 @@ describe("props validation", () => {
       { type: String, ok: "1", ko: 1 },
       { type: Object, ok: {}, ko: "1" },
       { type: Date, ok: new Date(), ko: "1" },
-      { type: Function, ok: () => {}, ko: "1" }
+      { type: Function, ok: () => {}, ko: "1" },
     ];
 
     let props;
@@ -396,7 +396,7 @@ describe("props validation", () => {
     class TestWidget extends Component {
       static template = xml`<div>hey</div>`;
       static props = {
-        p: { type: Object, shape: { id: Number, url: String } }
+        p: { type: Object, shape: { id: Number, url: String } },
       };
     }
     class Parent extends Component {
@@ -458,9 +458,9 @@ describe("props validation", () => {
           type: Object,
           shape: {
             id: Number,
-            url: [Boolean, { type: Array, element: Number }]
-          }
-        }
+            url: [Boolean, { type: Array, element: Number }],
+          },
+        },
       };
     }
     class Parent extends Component {
@@ -510,10 +510,10 @@ describe("props validation", () => {
           element: {
             type: Object,
             shape: {
-              num: { type: Number, optional: true }
-            }
-          }
-        }
+              num: { type: Number, optional: true },
+            },
+          },
+        },
       };
     }
     let error;
@@ -539,8 +539,8 @@ describe("props validation", () => {
     class TestComponent extends Component {
       static props = {
         size: {
-          validate: e => ["small", "medium", "large"].includes(e)
-        }
+          validate: (e) => ["small", "medium", "large"].includes(e),
+        },
       };
     }
     let error;
@@ -561,13 +561,13 @@ describe("props validation", () => {
   });
 
   test("can validate with a custom validator, and a type", () => {
-    const validator = jest.fn(n => 0 <= n && n <= 10);
+    const validator = jest.fn((n) => 0 <= n && n <= 10);
     class TestComponent extends Component {
       static props = {
         n: {
           type: Number,
-          validate: validator
-        }
+          validate: validator,
+        },
       };
     }
     let error;
@@ -786,6 +786,31 @@ describe("props validation", () => {
     await nextTick();
     expect(fixture.innerHTML).toBe("<div><div>4</div></div>");
   });
+
+  test("mix of optional and mandatory", async () => {
+    class Child extends Component {
+      static props = {
+        optional: { type: String, optional: true },
+        mandatory: Number,
+      };
+      static template = xml` <div><t t-esc="props.mandatory"/></div>`;
+    }
+
+    class App extends Component {
+      static components = { Child };
+      static template = xml`<div><Child/></div>`;
+    }
+
+    const w = new App(undefined, {});
+    let error;
+    try {
+      await w.mount(fixture);
+    } catch (e) {
+      error = e;
+    }
+    expect(error).toBeDefined();
+    expect(error.message).toBe("Missing props 'mandatory' (component 'Child')");
+  });
 });
 
 describe("default props", () => {

tests/component/slots.test.ts

@@ -28,7 +28,7 @@ afterEach(() => {
 
 function children(w: Component): Component[] {
   const childrenMap = w.__owl__.children;
-  return Object.keys(childrenMap).map(id => childrenMap[id]);
+  return Object.keys(childrenMap).map((id) => childrenMap[id]);
 }
 
 //------------------------------------------------------------------------------
@@ -41,8 +41,8 @@ describe("t-slot directive", () => {
           <templates>
             <div t-name="Parent">
                <Dialog>
-                  <t t-set="header"><span>header</span></t>
-                  <t t-set="footer"><span>footer</span></t>
+                  <t t-set-slot="header"><span>header</span></t>
+                  <t t-set-slot="footer"><span>footer</span></t>
                </Dialog>
             </div>
             <div t-name="Dialog">
@@ -67,6 +67,38 @@ describe("t-slot directive", () => {
     expect(QWeb.slots["1_footer"].toString()).toMatchSnapshot();
   });
 
+  test("can define and call slots using old t-set keyword", async () => {
+    // NOTE: this test should be removed once we stop supporting the t-set directive
+    // for defining slot content.
+    class Dialog extends Component {
+      static template = xml`
+        <div>
+          <div><t t-slot="header"/></div>
+          <div><t t-slot="footer"/></div>
+        </div>`;
+    }
+    class Parent extends Component {
+      static template = xml`
+        <div>
+          <Dialog>
+            <t t-set="header"><span>header</span></t>
+            <t t-set="footer"><span>footer</span></t>
+          </Dialog>
+        </div>`;
+      static components = { Dialog };
+    }
+    const parent = new Parent();
+    await parent.mount(fixture);
+
+    expect(fixture.innerHTML).toBe(
+      "<div><div><div><span>header</span></div><div><span>footer</span></div></div></div>"
+    );
+    expect(env.qweb.templates[Parent.template].fn.toString()).toMatchSnapshot();
+    expect(env.qweb.templates[Dialog.template].fn.toString()).toMatchSnapshot();
+    expect(QWeb.slots["1_header"].toString()).toMatchSnapshot();
+    expect(QWeb.slots["1_footer"].toString()).toMatchSnapshot();
+  });
+
   test("named slots can define a default content", async () => {
     class Dialog extends Component {
       static template = xml`
@@ -128,7 +160,7 @@ describe("t-slot directive", () => {
           </span>`;
     }
     class Parent extends Component {
-      static template = xml`<div><Dialog><t t-set="header">hey</t></Dialog></div>`;
+      static template = xml`<div><Dialog><t t-set-slot="header">hey</t></Dialog></div>`;
       static components = { Dialog };
     }
     const parent = new Parent();
@@ -143,7 +175,7 @@ describe("t-slot directive", () => {
             <div t-name="Parent">
               <span class="counter"><t t-esc="state.val"/></span>
               <Dialog>
-                <t t-set="footer"><button t-on-click="doSomething">do something</button></t>
+                <t t-set-slot="footer"><button t-on-click="doSomething">do something</button></t>
               </Dialog>
             </div>
             <span t-name="Dialog"><t t-slot="footer"/></span>
@@ -192,8 +224,8 @@ describe("t-slot directive", () => {
       state = useState({
         users: [
           { id: 1, name: "Aaron" },
-          { id: 2, name: "David" }
-        ]
+          { id: 2, name: "David" },
+        ],
       });
       static components = { Link };
     }
@@ -236,8 +268,8 @@ describe("t-slot directive", () => {
       state = useState({
         users: [
           { id: 1, name: "Aaron" },
-          { id: 2, name: "David" }
-        ]
+          { id: 2, name: "David" },
+        ],
       });
       static components = { Link };
     }
@@ -302,7 +334,7 @@ describe("t-slot directive", () => {
             <div>
               <span class="counter"><t t-esc="state.val"/></span>
               <Dialog>
-                <t t-set="footer"><button t-ref="myButton" t-on-click="doSomething">do something</button></t>
+                <t t-set-slot="footer"><button t-ref="myButton" t-on-click="doSomething">do something</button></t>
               </Dialog>
             </div>
           `;
@@ -376,7 +408,7 @@ describe("t-slot directive", () => {
           <templates>
             <div t-name="Parent">
                <Dialog>
-                  <t t-set="content">
+                  <t t-set-slot="content">
                       <span>sts</span>
                       <span>rocks</span>
                   </t>
@@ -442,14 +474,14 @@ describe("t-slot directive", () => {
     expect(fixture.innerHTML).toBe("<div><span><span>some content</span></span></div>");
   });
 
-  test("t-debug on a t-set (defining a slot)", async () => {
+  test("t-debug on a t-set-slot (defining a slot)", async () => {
     const consoleLog = console.log;
     console.log = jest.fn();
 
     env.qweb.addTemplates(`
           <templates>
             <div t-name="Parent">
-              <Dialog><t t-set="content" t-debug="">abc</t></Dialog>
+              <Dialog><t t-set-slot="content" t-debug="">abc</t></Dialog>
             </div>
             <span t-name="Dialog">
               <t t-slot="content"/>
@@ -623,8 +655,8 @@ describe("t-slot directive", () => {
     class A extends Component {
       static template = xml`
           <B>
-            <t t-set="s1"><C val="1"/></t>
-            <t t-set="s2"><C val="2"/></t>
+            <t t-set-slot="s1"><C val="1"/></t>
+            <t t-set-slot="s2"><C val="2"/></t>
           </B>`;
       static components = { B, C };
     }
@@ -873,4 +905,151 @@ describe("t-slot directive", () => {
     await parent.mount(fixture);
     expect(fixture.innerHTML).toBe("<div><div><span><p>heyaaron</p></span></div></div>");
   });
+
+  test("t-set t-value in a slot", async () => {
+    class Dialog extends Component {
+      static template = xml`
+          <span>
+            <t t-slot="default"/>
+          </span>`;
+    }
+    class Parent extends Component {
+      static template = xml`
+        <div>
+          <Dialog>
+            <t t-set="rainbow" t-value="'dash'"/>
+            <t t-esc="rainbow"/>
+          </Dialog>
+        </div>`;
+      static components = { Dialog };
+    }
+    const parent = new Parent();
+    await parent.mount(fixture);
+
+    expect(fixture.innerHTML).toBe("<div><span>dash</span></div>");
+    expect(env.qweb.templates[Dialog.template].fn.toString()).toMatchSnapshot();
+  });
+
+  test("slot and t-esc", async () => {
+    class Dialog extends Component {
+      static template = xml`<span><t t-slot="default"/></span>`;
+    }
+    class Parent extends Component {
+      static template = xml`<div><Dialog><t t-esc="'toph'"/></Dialog></div>`;
+      static components = { Dialog };
+    }
+    const parent = new Parent();
+    await parent.mount(fixture);
+
+    expect(fixture.innerHTML).toBe("<div><span>toph</span></div>");
+  });
+
+  test("slot and (inline) t-esc", async () => {
+    class Dialog extends Component {
+      static template = xml`<span><t t-slot="default"/></span>`;
+    }
+    class Parent extends Component {
+      static template = xml`<div><Dialog t-esc="'toph'"/></div>`;
+      static components = { Dialog };
+    }
+    const parent = new Parent();
+    await parent.mount(fixture);
+
+    expect(fixture.innerHTML).toBe("<div><span>toph</span></div>");
+  });
+
+  test("slot and t-call", async () => {
+    env.qweb.addTemplate("sokka", "<p>sokka</p>");
+    class Dialog extends Component {
+      static template = xml`<span><t t-slot="default"/></span>`;
+    }
+    class Parent extends Component {
+      static template = xml`<div><Dialog><t t-call="sokka"/></Dialog></div>`;
+      static components = { Dialog };
+    }
+    const parent = new Parent();
+    await parent.mount(fixture);
+
+    expect(fixture.innerHTML).toBe("<div><span><p>sokka</p></span></div>");
+  });
+
+  test("slot and (inline) t-call", async () => {
+    env.qweb.addTemplate("sokka", "<p>sokka</p>");
+    class Dialog extends Component {
+      static template = xml`<span><t t-slot="default"/></span>`;
+    }
+    class Parent extends Component {
+      static template = xml`<div><Dialog t-call="sokka"/></div>`;
+      static components = { Dialog };
+    }
+    const parent = new Parent();
+    await parent.mount(fixture);
+
+    expect(fixture.innerHTML).toBe("<div><span><p>sokka</p></span></div>");
+  });
+
+  test("named slot inside slot", async () => {
+    class Child extends Component {
+      static template = xml`
+        <div>
+          <t t-slot="brol"/>
+          <t t-slot="default"/>
+        </div>`;
+    }
+    class Parent extends Component {
+      static template = xml`
+        <div>
+          <Child>
+            <t t-set-slot="brol">
+              <p>A<t t-esc="value"/></p>
+            </t>
+            <Child>
+              <t t-set-slot="brol">
+                <p>B<t t-esc="value"/></p>
+              </t>
+            </Child>
+          </Child>
+        </div>`;
+      static components = { Child };
+      value = "blip";
+    }
+    const parent = new Parent();
+    await parent.mount(fixture);
+
+    expect(fixture.innerHTML).toBe("<div><div><p>Ablip</p><div><p>Bblip</p></div></div></div>");
+  });
+
+  test("named slots inside slot, again", async () => {
+    class Child extends Component {
+      static template = xml`
+        <child>
+          <t t-slot="brol1">default1</t>
+          <t t-slot="brol2">default2</t>
+          <t t-slot="default"/>
+        </child>`;
+    }
+    class Parent extends Component {
+      static template = xml`
+        <div>
+          <Child>
+            <t t-set-slot="brol1">
+              <p>A<t t-esc="value"/></p>
+            </t>
+            <Child>
+              <t t-set-slot="brol2">
+                <p>B<t t-esc="value"/></p>
+              </t>
+            </Child>
+          </Child>
+        </div>`;
+      static components = { Child };
+      value = "blip";
+    }
+    const parent = new Parent();
+    await parent.mount(fixture);
+
+    expect(fixture.innerHTML).toBe(
+      "<div><child><p>Ablip</p>default2<child>default1<p>Bblip</p></child></child></div>"
+    );
+  });
 });

tests/component/un_mounting.test.ts

@@ -2,6 +2,7 @@ import { Component, Env } from "../../src/component/component";
 import { useState } from "../../src/hooks";
 import { xml } from "../../src/tags";
 import { makeDeferred, makeTestEnv, makeTestFixture, nextTick, nextMicroTick } from "../helpers";
+import { scheduler } from "../../src/component/scheduler";
 
 //------------------------------------------------------------------------------
 // Setup and helpers
@@ -28,14 +29,34 @@ afterEach(() => {
 describe("mount targets", () => {
   test("can attach a component to an existing node (if same tagname)", async () => {
     class App extends Component {
-      static template = xml`<div>app</div>`;
+      static template = xml`<div t-att-class="state.customClass">app<p>another tag</p></div>`;
+      state = useState({ customClass: "custom" });
     }
     const div = document.createElement("div");
+    div.classList.add("arbitrary");
+    div.innerHTML = `<p>pre-existing</p>`;
     fixture.appendChild(div);
 
     const app = new App();
     await app.mount(div, { position: "self" });
-    expect(fixture.innerHTML).toBe("<div>app</div>");
+
+    expect(fixture.innerHTML).toBe(
+      `<div class="arbitrary custom"><p>pre-existing</p>app<p>another tag</p></div>`
+    );
+    expect(div).toBe(app.el);
+
+    app.state.customClass = "custom2";
+    await nextTick();
+    expect(fixture.innerHTML).toBe(
+      `<div class="arbitrary custom2"><p>pre-existing</p>app<p>another tag</p></div>`
+    );
+    expect(div).toBe(app.el);
+
+    app.unmount();
+    // This assert is a best guess
+    // The use case it covers was not really thought through
+    // and may change in the future
+    expect(fixture.innerHTML).toBe("");
   });
 
   test("cannot attach a component to an existing node (if not same tagname)", async () => {
@@ -315,7 +336,7 @@ describe("unmounting and remounting", () => {
     class Child extends Component {
       static template = xml`<span t-esc="state.val"/>`;
       state = useState({
-        val: "C1"
+        val: "C1",
       });
       constructor(parent, props) {
         super(parent, props);
@@ -470,4 +491,121 @@ describe("unmounting and remounting", () => {
     expect(steps).toEqual(["1 resolved", "2 resolved"]);
     expect(fixture.innerHTML).toBe("<div>Hey</div>");
   });
+
+  test("mounting a destroyed widget", async () => {
+    class MyWidget extends Component {
+      static template = xml`<div>Hey</div>`;
+    }
+    const w = new MyWidget();
+    w.destroy(); // because, why not
+
+    let error;
+    try {
+      await w.mount(fixture);
+    } catch (e) {
+      error = e;
+    }
+    expect(scheduler.tasks.length).toBe(0);
+    expect(error).toBeDefined();
+    expect(error.message).toBe("Cannot mount a destroyed component");
+  });
+
+  test("destroying a sub-component cleans itself from parent's vnode", async () => {
+    class C1 extends Component {
+      static template = xml`<div><div><t t-esc="props.a"/></div></div>`;
+    }
+    class P extends Component {
+      static components = { C1 };
+      static template = xml`<div><div><C1 t-props="state" t-if="state.a"/></div></div>`;
+      state = {
+        a: "first",
+      };
+    }
+    const parent = new P();
+    await parent.mount(fixture);
+    expect(fixture.textContent).toBe("first");
+    parent.unmount();
+    parent.state.a = "";
+    parent.mount(fixture);
+    parent.state.a = "fixed";
+    await parent.render();
+    expect(fixture.textContent).toBe("fixed");
+  });
+
+  test("destroying a sub-component cleans itself from parent's vnode, part 2", async () => {
+    class C1 extends Component {
+      static template = xml`<div><div><t t-esc="props.a"/></div></div>`;
+    }
+    class P extends Component {
+      static components = { C1 };
+      static template = xml`<div><div><C1 t-props="state" t-if="state.a"/>some text</div></div>`;
+      state = {
+        a: "first",
+      };
+    }
+    const parent = new P();
+    await parent.mount(fixture);
+    expect(fixture.textContent).toBe("firstsome text");
+    parent.unmount();
+    parent.state.a = "";
+    parent.mount(fixture);
+    parent.state.a = "fixed";
+    await parent.render();
+    expect(fixture.textContent).toBe("fixedsome text");
+  });
+
+  test("destroying a sub-component cleans itself from parent's vnode, part 3", async () => {
+    class C1 extends Component {
+      static template = xml`<div><div><t t-esc="props.a"/></div></div>`;
+    }
+
+    class C2 extends Component {
+      static template = xml`<C1 a="props.a"/>`;
+      static components = { C1 };
+    }
+
+    class P extends Component {
+      static components = { C2 };
+      static template = xml`<div><div><C2 t-props="state" t-if="state.a"/></div></div>`;
+      state = {
+        a: "first",
+      };
+    }
+    const parent = new P();
+    await parent.mount(fixture);
+    expect(fixture.textContent).toBe("first");
+    parent.unmount();
+    parent.state.a = "";
+    parent.mount(fixture);
+    parent.state.a = "fixed";
+    await parent.render();
+    expect(fixture.textContent).toBe("fixed");
+  });
+
+  test("destroying a sub-component cleans itself from parent's vnode, part 4", async () => {
+    class C1 extends Component {
+      static template = xml`<div><div><t t-esc="props.a"/></div></div>`;
+    }
+
+    class C2 extends Component {
+      static template = xml`<C1 a="props.a"/>`;
+      static components = { C1 };
+    }
+    class P extends Component {
+      static components = { C2 };
+      static template = xml`<div><div><C2 t-props="state" t-if="state.a"/>some text</div></div>`;
+      state = {
+        a: "first",
+      };
+    }
+    const parent = new P();
+    await parent.mount(fixture);
+    expect(fixture.textContent).toBe("firstsome text");
+    parent.unmount();
+    parent.state.a = "";
+    parent.mount(fixture);
+    parent.state.a = "fixed";
+    await parent.render();
+    expect(fixture.textContent).toBe("fixedsome text");
+  });
 });

tests/core/event_bus.test.ts

@@ -14,7 +14,7 @@ describe("event bus behaviour", () => {
     expect.assertions(1);
     const bus = new EventBus();
     const owner = {};
-    bus.on("event", owner, function(this: any) {
+    bus.on("event", owner, function (this: any) {
       expect(this).toBe(owner);
     });
     bus.trigger("event");

tests/core/observer.test.ts

@@ -22,7 +22,7 @@ describe("observer", () => {
     expect(observer.rev).toBe(2);
 
     expect(obj2).toEqual({
-      a: 2
+      a: 2,
     });
   });
 
@@ -47,7 +47,7 @@ describe("observer", () => {
     expect(observer.rev).toBe(5);
     expect(obj).toEqual({
       a: null,
-      b: undefined
+      b: undefined,
     });
   });
 
@@ -68,6 +68,23 @@ describe("observer", () => {
     expect(obj.date).not.toBe(date);
   });
 
+  test("properly handle promises (i.e.: treat them like primitive values", async () => {
+    const observer = new Observer();
+    let resolved = false;
+    const prom = new Promise((r) => r());
+    const obj: any = observer.observe({ prom });
+    expect(obj.prom).toBeInstanceOf(Promise);
+
+    obj.prom.then(() => (resolved = true));
+
+    expect(observer.revNumber(obj)).toBe(1);
+
+    expect(resolved).toBe(false);
+    await Promise.resolve();
+    expect(resolved).toBe(true);
+    expect(observer.revNumber(obj)).toBe(1);
+  });
+
   test("can change values in array", () => {
     const observer = new Observer();
     const obj: any = observer.observe({ arr: [1, 2] });

tests/helpers.ts

@@ -6,12 +6,7 @@ import { patch } from "../src/vdom";
 import "../src/qweb/base_directives";
 import "../src/qweb/extensions";
 import "../src/component/directive";
-
-// modifies scheduler to make it faster to test components
-scheduler.requestAnimationFrame = function(callback: FrameRequestCallback) {
-  setTimeout(callback, 1);
-  return 1;
-};
+import { browser } from "../src/browser";
 
 // Some static cleanup
 let nextSlotId;
@@ -42,9 +37,13 @@ export function nextMicroTick(): Promise<void> {
 }
 
 export async function nextTick(): Promise<void> {
-  return new Promise(function(resolve) {
-    setTimeout(() => scheduler.requestAnimationFrame(() => resolve()));
-  });
+  await new Promise((resolve) => setTimeout(resolve));
+  await new Promise((resolve) => scheduler.requestAnimationFrame(resolve));
+}
+
+export async function nextFrame(): Promise<void> {
+  await new Promise((resolve) => scheduler.requestAnimationFrame(resolve));
+  await new Promise((resolve) => scheduler.requestAnimationFrame(resolve));
 }
 
 export function makeTestFixture() {
@@ -75,7 +74,8 @@ export function makeDeferred(): Deferred {
 
 export function makeTestEnv(): Env {
   return {
-    qweb: new QWeb()
+    qweb: new QWeb(),
+    browser: browser,
   };
 }
 
@@ -132,7 +132,7 @@ export function renderToString(
 // is useful for animations tests, as we hook before repaints to trigger
 // animations (thanks to requestAnimationFrame). Patching nextFrame allows to
 // simulate calls to this hook. One must not forget to unpatch afterwards.
-let nextFrame = QWeb.utils.nextFrame;
+let _nextFrame = QWeb.utils.nextFrame;
 export function patchNextFrame(f: Function) {
   QWeb.utils.nextFrame = (cb: () => void) => {
     setTimeout(() => f(cb));
@@ -140,7 +140,7 @@ export function patchNextFrame(f: Function) {
 }
 
 export function unpatchNextFrame() {
-  QWeb.utils.nextFrame = nextFrame;
+  QWeb.utils.nextFrame = _nextFrame;
 }
 
 export async function editInput(input: HTMLInputElement | HTMLTextAreaElement, value: string) {

tests/hooks.test.ts

@@ -10,7 +10,7 @@ import {
   onWillStart,
   onWillUpdateProps,
   useSubEnv,
-  useExternalListener
+  useExternalListener,
 } from "../src/hooks";
 import { xml } from "../src/tags";
 
@@ -214,7 +214,7 @@ describe("hooks", () => {
       "hook:mounted1",
       "hook:mounted2",
       "hook:willunmount2",
-      "hook:willunmount1"
+      "hook:willunmount1",
     ]);
   });
 
@@ -267,7 +267,7 @@ describe("hooks", () => {
     class WidgetC extends Component {
       static template = xml`<div class="outer-div">Hello<WidgetB t-ref="mywidgetb" /></div>`;
       static components = { WidgetB };
-      ref = useRef("mywidgetb");
+      ref = useRef<WidgetB>("mywidgetb");
     }
 
     const widget = new WidgetC();
@@ -559,20 +559,39 @@ describe("hooks", () => {
 
   test("can use onWillStart, onWillUpdateProps", async () => {
     const steps: string[] = [];
+    async function slow(): Promise<string> {
+      return new Promise((resolve) => {
+        setTimeout(() => {
+          resolve("slow");
+        }, 0);
+      });
+    }
     function useMyHook() {
-      onWillStart(() => {
+      onWillStart(async () => {
+        steps.push(await slow());
         steps.push("onWillStart");
       });
-      onWillUpdateProps(nextProps => {
+      onWillUpdateProps(async (nextProps) => {
         expect(nextProps).toEqual({ value: 2 });
+        steps.push(await slow());
         steps.push("onWillUpdateProps");
       });
     }
+    function use2ndHook() {
+      onWillStart(() => {
+        steps.push("on2ndStart");
+      });
+      onWillUpdateProps((nextProps) => {
+        expect(nextProps).toEqual({ value: 2 });
+        steps.push("on2ndUpdate");
+      });
+    }
     class MyComponent extends Component {
       static template = xml`<span><t t-esc="props.value"/></span>`;
       constructor(parent, props) {
         super(parent, props);
         useMyHook();
+        use2ndHook();
       }
     }
     class App extends Component {
@@ -586,12 +605,26 @@ describe("hooks", () => {
     expect(app).not.toHaveProperty("willStart");
     expect(app).not.toHaveProperty("willUpdateProps");
     expect(fixture.innerHTML).toBe("<div><span>1</span></div>");
-    expect(steps).toEqual(["onWillStart"]);
+
+    // NOTE: 'on2ndStart' appears first in the list even though
+    // the 'use2ndHook' is declared after 'useMyHook'. This is
+    // because Promise.all is used to call the callbacks specified
+    // in the hooks, which runs them simultaneously.
+    // Additionally, 'slow' should be listed before 'onWillStart'
+    // because call to `slow` is awaited.
+    expect(steps).toEqual(["on2ndStart", "slow", "onWillStart"]);
 
     app.state.value = 2;
     await nextTick();
     expect(fixture.innerHTML).toBe("<div><span>2</span></div>");
-    expect(steps).toEqual(["onWillStart", "onWillUpdateProps"]);
+    expect(steps).toEqual([
+      "on2ndStart",
+      "slow",
+      "onWillStart",
+      "on2ndUpdate",
+      "slow",
+      "onWillUpdateProps",
+    ]);
   });
 
   test("useExternalListener", async () => {

tests/misc/portal.test.ts

@@ -486,7 +486,7 @@ describe("Portal: Basic use and DOM placement", () => {
       "parent:mounted",
       "parent:willPatch",
       "child:mounted",
-      "parent:patched"
+      "parent:patched",
     ]);
 
     parent.state.val = 2;
@@ -499,7 +499,7 @@ describe("Portal: Basic use and DOM placement", () => {
       "parent:willPatch",
       "child:willPatch",
       "child:patched",
-      "parent:patched"
+      "parent:patched",
     ]);
 
     parent.state.hasChild = false;
@@ -515,7 +515,7 @@ describe("Portal: Basic use and DOM placement", () => {
       "parent:patched",
       "parent:willPatch",
       "child:willUnmount",
-      "parent:patched"
+      "parent:patched",
     ]);
   });
 
@@ -741,7 +741,7 @@ describe("Portal: Events handling", () => {
         steps.push(ev.type as string);
       }
     }
-    const bodyListener = ev => {
+    const bodyListener = (ev) => {
       steps.push(`body: ${ev.type}`);
     };
     document.body.addEventListener("click", bodyListener);

tests/qweb/qweb.test.ts

@@ -195,7 +195,7 @@ describe("t-esc", () => {
       v2: undefined,
       v3: null,
       v4: 0,
-      v5: ""
+      v5: "",
     };
     expect(renderToString(qweb, "test", vals)).toBe(
       "<div><p>false</p><p></p><p></p><p>0</p><p></p></div>"
@@ -207,6 +207,13 @@ describe("t-esc", () => {
     const result = renderToString(qweb, "test", { state: { list: [1, 2] } });
     expect(result).toBe("<span>1,2</span>");
   });
+
+  test("t-esc inside t-call, with t-set outside", () => {
+    qweb.addTemplate("main", `<div><t t-set="v">Hi</t><t t-call="sub"/></div>`);
+    qweb.addTemplate("sub", `<span t-esc="v"/>`);
+    const result = renderToString(qweb, "main");
+    expect(result).toBe("<div><span>Hi</span></div>");
+  });
 });
 
 describe("t-raw", () => {
@@ -231,6 +238,13 @@ describe("t-raw", () => {
       "<span><span>hello</span><ok>world</ok></span>"
     );
   });
+
+  test("t-raw with comment", () => {
+    qweb.addTemplate("test", `<span><t t-raw="var"/></span>`);
+    expect(renderToString(qweb, "test", { var: "<p>text<!-- top secret --></p>" })).toBe(
+      "<span><p>text<!-- top secret --></p></span>"
+    );
+  });
 });
 
 describe("t-set", () => {
@@ -486,7 +500,7 @@ describe("t-if", () => {
       cond3: false,
       cond4: false,
       m: 5,
-      n: 2
+      n: 2,
     };
     expect(normalize(renderToString(qweb, "test", context))).toBe("<div>andormgtnlt</div>");
   });
@@ -625,7 +639,7 @@ describe("attributes", () => {
   test("object", () => {
     qweb.addTemplate("test", `<div t-att="value"/>`);
     const result = renderToString(qweb, "test", {
-      value: { a: 1, b: 2, c: 3 }
+      value: { a: 1, b: 2, c: 3 },
     });
     expect(result).toBe(`<div a="1" b="2" c="3"></div>`);
   });
@@ -684,7 +698,7 @@ describe("attributes", () => {
     const result = renderToString(qweb, "test", {
       value1: 0,
       value2: 1,
-      value3: 2
+      value3: 2,
     });
     expect(result).toBe(`<div foo="a 0 is 1 of 2 ]"></div>`);
   });
@@ -703,7 +717,7 @@ describe("attributes", () => {
     const result = renderToString(qweb, "test", {
       bar: 0,
       baz: 1,
-      qux: { qux: "<>" }
+      qux: { qux: "<>" },
     });
     const expected = '<div foo="<foo" bar="0" baz="<1>" qux="<>"></div>';
     expect(result).toBe(expected);
@@ -715,6 +729,12 @@ describe("attributes", () => {
     expect(result).toBe(`<div class="hello world"></div>`);
   });
 
+  test("class and t-att-class should combine together", () => {
+    qweb.addTemplate("test", `<div t-att-class="value" class="hello" />`);
+    const result = renderToString(qweb, "test", { value: "world" });
+    expect(result).toBe(`<div class="world hello"></div>`);
+  });
+
   test("class and t-attf-class with ternary operation", () => {
     qweb.addTemplate("test", `<div class="hello" t-attf-class="{{value ? 'world' : ''}}"/>`);
     const result = renderToString(qweb, "test", { value: true });
@@ -734,7 +754,7 @@ describe("t-call (template calling", () => {
     qweb.addTemplate("caller", '<div><t t-call="_basic-callee"/></div>');
     const expected = "<div><span>ok</span></div>";
     expect(renderToString(qweb, "caller")).toBe(expected);
-    expect(qweb.subTemplates["_basic-callee"].toString()).toMatchSnapshot();
+    expect(qweb.subTemplates["_basic-callee"]).toBeTruthy();
   });
 
   test("basic caller, no parent node", () => {
@@ -742,7 +762,7 @@ describe("t-call (template calling", () => {
     qweb.addTemplate("caller", '<t t-call="_basic-callee"/>');
     const expected = "<div>ok</div>";
     expect(renderToString(qweb, "caller")).toBe(expected);
-    expect(qweb.subTemplates["_basic-callee"].toString()).toMatchSnapshot();
+    expect(qweb.subTemplates["_basic-callee"]).toBeTruthy();
   });
 
   test("t-call with t-if", () => {
@@ -750,13 +770,14 @@ describe("t-call (template calling", () => {
     qweb.addTemplate("caller", '<div><t t-if="flag" t-call="sub"/></div>');
     const expected = "<div><span>ok</span></div>";
     expect(renderToString(qweb, "caller", { flag: true })).toBe(expected);
-    expect(qweb.subTemplates["sub"].toString()).toMatchSnapshot();
+    expect(qweb.subTemplates["sub"]).toBeTruthy();
   });
 
-  test("t-call not allowed on a non t node", () => {
-    qweb.addTemplate("_basic-callee", "<t>ok</t>");
+  test("t-call allowed on a non t node", () => {
+    qweb.addTemplate("_basic-callee", "<span>ok</span>");
     qweb.addTemplate("caller", '<div t-call="_basic-callee"/>');
-    expect(() => renderToString(qweb, "caller")).toThrow("Invalid tag");
+    const expected = "<div><span>ok</span></div>";
+    expect(renderToString(qweb, "caller")).toBe(expected);
   });
 
   test("with unused body", () => {
@@ -885,7 +906,8 @@ describe("t-call (template calling", () => {
     `);
     const expected = "<div><span>hey</span></div>";
     expect(renderToString(qweb, "recursive")).toBe(expected);
-    const recursiveFn = Object.values(qweb.subTemplates)[0] as any;
+    const subId = qweb.subTemplates["recursive"];
+    const recursiveFn = QWeb.subTemplates[subId] as any;
     expect(recursiveFn.toString()).toMatchSnapshot();
   });
 
@@ -913,7 +935,8 @@ describe("t-call (template calling", () => {
     expect(renderToString(qweb, "Parent", { root }, { fiber: { vars: {}, scope: {} } })).toBe(
       expected
     );
-    const recursiveFn = Object.values(qweb.subTemplates)[0] as any;
+    const subId = qweb.subTemplates["nodeTemplate"];
+    const recursiveFn = QWeb.subTemplates[subId] as any;
     expect(recursiveFn.toString()).toMatchSnapshot();
   });
 
@@ -940,7 +963,41 @@ describe("t-call (template calling", () => {
     const expected =
       "<div><div><p>a</p><div><p>b</p><div><p>d</p></div></div><div><p>c</p></div></div></div>";
     expect(renderToString(qweb, "Parent", { root }, { fiber: {} })).toBe(expected);
-    const recursiveFn = Object.values(qweb.subTemplates)[0] as any;
+    const subId = qweb.subTemplates["nodeTemplate"];
+    const recursiveFn = QWeb.subTemplates[subId] as any;
+    expect(recursiveFn.toString()).toMatchSnapshot();
+  });
+
+  test("recursive template, part 4: with t-set recursive index", () => {
+    qweb.addTemplates(`
+        <templates>
+            <div t-name="Parent">
+                <t t-call="nodeTemplate">
+                    <t t-set="recursive_idx" t-value="1"/>
+                    <t t-set="node" t-value="root"/>
+                </t>
+            </div>
+            <div t-name="nodeTemplate">
+                <t t-set="recursive_idx" t-value="recursive_idx + 1"/>
+                <p><t t-esc="node.val"/> <t t-esc="recursive_idx"/></p>
+                <t t-foreach="node.children or []" t-as="subtree">
+                    <t t-call="nodeTemplate">
+                        <t t-set="node" t-value="subtree"/>
+                    </t>
+                </t>
+            </div>
+
+        </templates>
+    `);
+    const root = {
+      val: "a",
+      children: [{ val: "b", children: [{ val: "c", children: [{ val: "d" }] }] }],
+    };
+    const expected =
+      "<div><div><p>a 2</p><div><p>b 3</p><div><p>c 4</p><div><p>d 5</p></div></div></div></div></div>";
+    expect(renderToString(qweb, "Parent", { root })).toBe(expected);
+    const subId = qweb.subTemplates["nodeTemplate"];
+    const recursiveFn = QWeb.subTemplates[subId] as any;
     expect(recursiveFn.toString()).toMatchSnapshot();
   });
 
@@ -1012,6 +1069,52 @@ describe("t-call (template calling", () => {
     const context = { list: [{ val: 1 }, { val: 2 }, { val: 3 }] };
     expect(trim(renderToString(qweb, "wrapper", context))).toBe(expected);
   });
+
+  test("two different QWeb instances, and shared templates", () => {
+    QWeb.registerTemplate("sub", `<span>ok</span>`);
+    QWeb.registerTemplate("main", `<div><t t-call="sub"/></div>`);
+
+    const qweb1 = new QWeb();
+    const qweb2 = new QWeb();
+
+    expect(renderToString(qweb1, "main")).toBe("<div><span>ok</span></div>");
+    expect(renderToString(qweb2, "main")).toBe("<div><span>ok</span></div>");
+  });
+
+  test("t-call with t-set inside and body text content", () => {
+    qweb.addTemplate("sub", `<p><t t-esc="val"/></p>`);
+    qweb.addTemplate(
+      "main",
+      `
+      <div>
+        <t t-call="sub">
+          <t t-set="val">yip yip</t>
+        </t>
+      </div>`
+    );
+    const expected = "<div><p>yip yip</p></div>";
+    expect(renderToString(qweb, "main")).toBe(expected);
+  });
+
+  test("t-call with body content as root of a template", () => {
+    qweb.addTemplate("antony", `<foo><t t-raw="0"/></foo>`);
+    qweb.addTemplate("main", `<t><t t-call="antony"><p>antony</p></t></t>`);
+    const expected = "<foo><p>antony</p></foo>";
+    expect(renderToString(qweb, "main")).toBe(expected);
+  });
+
+  test("dynamic t-call", () => {
+    qweb.addTemplate("foo", `<foo><t t-esc="val"/></foo>`);
+    qweb.addTemplate("bar", `<bar><t t-esc="val"/></bar>`);
+    qweb.addTemplate("main", `<div><t t-call="{{template}}"/></div>`);
+    const expected = "<div><foo>foo</foo></div>";
+    expect(renderToString(qweb, "main", { template: "foo", val: "foo" })).toBe(expected);
+    const expected2 = "<div><bar>quux</bar></div>";
+    expect(renderToString(qweb, "main", { template: "bar", val: "quux" })).toBe(expected2);
+    // duplicate call because there was a specific bug with some id that was
+    // incremented each rendering.
+    expect(renderToString(qweb, "main", { template: "bar", val: "quux" })).toBe(expected2);
+  });
 });
 
 describe("foreach", () => {
@@ -1102,6 +1205,63 @@ describe("foreach", () => {
     );
   });
 
+  test("t-call without body in t-foreach in t-foreach", () => {
+    qweb.addTemplate(
+      "test_called",
+      `<t>
+        <t t-set="c" t-value="'x' + '_' + a + '_'+ b" />
+        [<t t-esc="a" />]
+        [<t t-esc="b" />]
+        [<t t-esc="c" />]
+       </t>`
+    );
+    qweb.addTemplate(
+      "test",
+      `<div>
+        <t t-foreach="numbers" t-as="a">
+          <t t-foreach="letters" t-as="b">
+            <t t-call="test_called" />
+          </t>
+          <span t-esc="c"/>
+        </t>
+        <span>[<t t-esc="a" />][<t t-esc="b" />][<t t-esc="c" />]</span>
+      </div>`
+    );
+    const context = { numbers: [1, 2, 3], letters: ["a", "b"] };
+    expect(renderToString(qweb, "test", context)).toBe(
+      "<div> [1] [a] [x_1_a]  [1] [b] [x_1_b] <span></span> [2] [a] [x_2_a]  [2] [b] [x_2_b] <span></span> [3] [a] [x_3_a]  [3] [b] [x_3_b] <span></span><span>[][][]</span></div>"
+    );
+  });
+
+  test("t-call with body in t-foreach in t-foreach", () => {
+    qweb.addTemplate(
+      "test_called",
+      `<t>
+        [<t t-esc="a" />]
+        [<t t-esc="b" />]
+        [<t t-esc="c" />]
+       </t>`
+    );
+    qweb.addTemplate(
+      "test",
+      `<div>
+        <t t-foreach="numbers" t-as="a">
+          <t t-foreach="letters" t-as="b">
+            <t t-call="test_called" >
+              <t t-set="c" t-value="'x' + '_' + a + '_'+ b" />
+            </t>
+          </t>
+          <span t-esc="c"/>
+        </t>
+        <span>[<t t-esc="a" />][<t t-esc="b" />][<t t-esc="c" />]</span>
+      </div>`
+    );
+    const context = { numbers: [1, 2, 3], letters: ["a", "b"] };
+    expect(renderToString(qweb, "test", context)).toBe(
+      "<div> [1] [a] [x_1_a]  [1] [b] [x_1_b] <span></span> [2] [a] [x_2_a]  [2] [b] [x_2_b] <span></span> [3] [a] [x_3_a]  [3] [b] [x_3_b] <span></span><span>[][][]</span></div>"
+    );
+  });
+
   test("throws error if invalid loop expression", () => {
     qweb.addTemplate(
       "test",
@@ -1197,7 +1357,7 @@ describe("t-on", () => {
       {
         add() {
           a = 3;
-        }
+        },
       },
       { handlers: [] }
     );
@@ -1220,7 +1380,7 @@ describe("t-on", () => {
         },
         handleDblClick() {
           steps.push("dblclick");
-        }
+        },
       },
       { handlers: [] }
     );
@@ -1240,7 +1400,7 @@ describe("t-on", () => {
       {
         add(n) {
           a = a + n;
-        }
+        },
       },
       { handlers: [] }
     );
@@ -1257,7 +1417,7 @@ describe("t-on", () => {
       {
         add({ val }) {
           a = a + val;
-        }
+        },
       },
       { handlers: [] }
     );
@@ -1274,7 +1434,7 @@ describe("t-on", () => {
       {
         doSomething(arg) {
           expect(arg).toEqual({});
-        }
+        },
       },
       { handlers: [] }
     );
@@ -1290,7 +1450,7 @@ describe("t-on", () => {
       {
         doSomething(arg) {
           expect(arg).toEqual({});
-        }
+        },
       },
       { handlers: [] }
     );
@@ -1312,7 +1472,7 @@ describe("t-on", () => {
       {
         activate(action) {
           expect(action).toBe("someval");
-        }
+        },
       },
       { handlers: [] }
     );
@@ -1325,7 +1485,7 @@ describe("t-on", () => {
     let owner = {
       add() {
         expect(this).toBe(owner);
-      }
+      },
     };
     const node = renderToDOM(qweb, "test", owner, { handlers: [] });
     (<HTMLElement>node).click();
@@ -1335,8 +1495,8 @@ describe("t-on", () => {
     qweb.addTemplate("test", `<button t-on-click="state.counter++">Click</button>`);
     let owner = {
       state: {
-        counter: 0
-      }
+        counter: 0,
+      },
     };
     const node = renderToDOM(qweb, "test", owner, { handlers: [] });
     expect(owner.state.counter).toBe(0);
@@ -1349,10 +1509,10 @@ describe("t-on", () => {
     let owner = {
       state: {
         counter: 0,
-        incrementCounter: inc => {
+        incrementCounter: (inc) => {
           owner.state.counter += inc;
-        }
-      }
+        },
+      },
     };
     const node = renderToDOM(qweb, "test", owner, { handlers: [] });
     expect(owner.state.counter).toBe(0);
@@ -1364,8 +1524,8 @@ describe("t-on", () => {
     qweb.addTemplate("test", `<button t-on-click="state.flag = !state.flag">Toggle</button>`);
     let owner = {
       state: {
-        flag: true
-      }
+        flag: true,
+      },
     };
     const node = renderToDOM(qweb, "test", owner, { handlers: [] });
     expect(owner.state.flag).toBe(true);
@@ -1382,8 +1542,8 @@ describe("t-on", () => {
         return n + 1;
       },
       state: {
-        n: 11
-      }
+        n: 11,
+      },
     };
     const node = renderToDOM(qweb, "test", owner, { handlers: [] });
     expect(owner.state.n).toBe(11);
@@ -1399,7 +1559,7 @@ describe("t-on", () => {
     let owner = {
       update() {
         expect(this).toBe(owner);
-      }
+      },
     };
 
     const node = renderToDOM(qweb, "main", owner, { handlers: [] });
@@ -1416,7 +1576,7 @@ describe("t-on", () => {
         expect(this).toBe(owner);
         expect(val).toBe(444);
       },
-      value: 444
+      value: 444,
     };
 
     const node = renderToDOM(qweb, "main", owner, { handlers: [] });
@@ -1445,7 +1605,7 @@ describe("t-on", () => {
       onClickPreventedAndStopped(e) {
         expect(e.defaultPrevented).toBe(true);
         expect(e.cancelBubble).toBe(true);
-      }
+      },
     };
     const node = renderToDOM(qweb, "test", owner, { handlers: [] });
 
@@ -1471,7 +1631,7 @@ describe("t-on", () => {
       },
       onClickSelf(e) {
         steps.push("onClickSelf");
-      }
+      },
     };
     const node = renderToDOM(qweb, "test", owner, { handlers: [] });
 
@@ -1495,10 +1655,10 @@ describe("t-on", () => {
     );
     let steps: boolean[] = [];
     let owner = {
-      onClick() {}
+      onClick() {},
     };
     const node = renderToDOM(qweb, "test", owner, { handlers: [] });
-    (<HTMLElement>node).addEventListener("click", function(e) {
+    (<HTMLElement>node).addEventListener("click", function (e) {
       steps.push(e.defaultPrevented);
     });
 
@@ -1520,10 +1680,10 @@ describe("t-on", () => {
     );
     let steps: boolean[] = [];
     let owner = {
-      onClick() {}
+      onClick() {},
     };
     const node = renderToDOM(qweb, "test", owner, { handlers: [] });
-    (<HTMLElement>node).addEventListener("click", function(e) {
+    (<HTMLElement>node).addEventListener("click", function (e) {
       steps.push(e.defaultPrevented);
     });
 
@@ -1551,13 +1711,13 @@ describe("t-on", () => {
     const owner = {
       projects: [
         { id: 1, name: "Project 1" },
-        { id: 2, name: "Project 2" }
+        { id: 2, name: "Project 2" },
       ],
 
       onEdit(projectId, ev) {
         expect(ev.defaultPrevented).toBe(true);
         steps.push(projectId);
-      }
+      },
     };
 
     const node = <HTMLElement>renderToDOM(qweb, "test", owner, { handlers: [] });
@@ -1582,7 +1742,7 @@ describe("t-on", () => {
     );
     const node = renderToDOM(qweb, "test", {}, { handlers: [] });
 
-    node.addEventListener("click", e => {
+    node.addEventListener("click", (e) => {
       expect(e.defaultPrevented).toBe(true);
     });
 
@@ -1598,7 +1758,7 @@ describe("t-on", () => {
       text: "Click here",
       onClick() {
         steps.push("onClick");
-      }
+      },
     };
 
     const node = <HTMLElement>renderToDOM(qweb, "test", owner, { handlers: [] });
@@ -1617,7 +1777,7 @@ describe("t-on", () => {
       html: "Click <b>here</b>",
       onClick() {
         steps.push("onClick");
-      }
+      },
     };
 
     const node = <HTMLElement>renderToDOM(qweb, "test", owner, { handlers: [] });
@@ -1644,7 +1804,7 @@ describe("t-on", () => {
       },
       doSomething() {
         steps.push("normal");
-      }
+      },
     };
     const node = renderToDOM(qweb, "test", owner, { handlers: [] });
 
@@ -1717,7 +1877,7 @@ describe("loading templates", () => {
   });
 });
 
-describe("special cases for some boolean html attributes/properties", () => {
+describe("special cases for some specific html attributes/properties", () => {
   test("input type= checkbox, with t-att-checked", () => {
     qweb.addTemplate("test", `<input type="checkbox" t-att-checked="flag"/>`);
     const result = renderToString(qweb, "test", { flag: true });
@@ -1744,6 +1904,33 @@ describe("special cases for some boolean html attributes/properties", () => {
     );
     renderToString(qweb, "test", { flag: true });
   });
+
+  test("input with t-att-value", () => {
+    // render input with initial value
+    qweb.addTemplate("test", `<input  t-att-value="v"/>`);
+    const vnode1 = qweb.render("test", { v: "zucchini" });
+    const vnode2 = patch(document.createElement("input"), vnode1);
+    let elm = vnode2.elm as HTMLInputElement;
+    expect(elm.value).toBe("zucchini");
+
+    // change value manually in input, to simulate user input
+    elm.value = "tomato";
+    expect(elm.value).toBe("tomato");
+
+    // rerender with a different value, and patch actual dom, to check that
+    // input value was properly reset by owl
+    const vnode3 = qweb.render("test", { v: "potato" });
+    patch(vnode2, vnode3);
+    expect(elm.value).toBe("potato");
+  });
+
+  test("input of type checkbox with t-att-indeterminate", () => {
+    qweb.addTemplate("test", `<input type="checkbox" t-att-indeterminate="v"/>`);
+    const vnode1 = qweb.render("test", { v: true });
+    const vnode2 = patch(document.createElement("input"), vnode1);
+    let elm = vnode2.elm as HTMLInputElement;
+    expect(elm.indeterminate).toBe(true);
+  });
 });
 
 describe("whitespace handling", () => {
@@ -1808,7 +1995,7 @@ describe("t-key", () => {
     );
     expect(
       renderToString(qweb, "test", {
-        beers: [{ id: 12, name: "Chimay Rouge" }]
+        beers: [{ id: 12, name: "Chimay Rouge" }],
       })
     ).toMatchSnapshot();
   });
@@ -1921,9 +2108,9 @@ describe("properly support svg", () => {
 describe("translation support", () => {
   test("can translate node content", () => {
     const translations = {
-      word: "mot"
+      word: "mot",
     };
-    const translateFn = expr => translations[expr] || expr;
+    const translateFn = (expr) => translations[expr] || expr;
     const qweb = new QWeb({ translateFn });
     qweb.addTemplate("test", "<div>word</div>");
     expect(renderToString(qweb, "test")).toBe("<div>mot</div>");
@@ -1931,9 +2118,9 @@ describe("translation support", () => {
 
   test("does not translate node content if disabled", () => {
     const translations = {
-      word: "mot"
+      word: "mot",
     };
-    const translateFn = expr => translations[expr] || expr;
+    const translateFn = (expr) => translations[expr] || expr;
     const qweb = new QWeb({ translateFn });
     qweb.addTemplate(
       "test",
@@ -1948,9 +2135,9 @@ describe("translation support", () => {
 
   test("some attributes are translated", () => {
     const translations = {
-      word: "mot"
+      word: "mot",
     };
-    const translateFn = expr => translations[expr] || expr;
+    const translateFn = (expr) => translations[expr] || expr;
     const qweb = new QWeb({ translateFn });
     qweb.addTemplate(
       "test",

tests/qweb/qweb_expressions.test.ts

@@ -6,12 +6,12 @@ describe("tokenizer", () => {
 
     expect(tokenize("{}")).toEqual([
       { type: "LEFT_BRACE", value: "{" },
-      { type: "RIGHT_BRACE", value: "}" }
+      { type: "RIGHT_BRACE", value: "}" },
     ]);
     expect(tokenize("{ }}")).toEqual([
       { type: "LEFT_BRACE", value: "{" },
       { type: "RIGHT_BRACE", value: "}" },
-      { type: "RIGHT_BRACE", value: "}" }
+      { type: "RIGHT_BRACE", value: "}" },
     ]);
     expect(tokenize("a")).toEqual([{ type: "SYMBOL", value: "a" }]);
     expect(tokenize("true")).toEqual([{ type: "SYMBOL", value: "true" }]);
@@ -25,15 +25,15 @@ describe("tokenizer", () => {
       { type: "SYMBOL", value: "a" },
       { type: "COLON", value: ":" },
       { type: "VALUE", value: "2" },
-      { type: "RIGHT_BRACE", value: "}" }
+      { type: "RIGHT_BRACE", value: "}" },
     ]);
     expect(tokenize("a,")).toEqual([
       { type: "SYMBOL", value: "a" },
-      { type: "COMMA", value: "," }
+      { type: "COMMA", value: "," },
     ]);
     expect(tokenize("][")).toEqual([
       { type: "RIGHT_BRACKET", value: "]" },
-      { type: "LEFT_BRACKET", value: "[" }
+      { type: "LEFT_BRACKET", value: "[" },
     ]);
   });
 
@@ -44,23 +44,23 @@ describe("tokenizer", () => {
       { type: "OPERATOR", value: "<" },
       { type: "OPERATOR", value: ">" },
       { type: "OPERATOR", value: "!==" },
-      { type: "OPERATOR", value: "!=" }
+      { type: "OPERATOR", value: "!=" },
     ]);
     expect(tokenize("typeof a")).toEqual([
       { type: "OPERATOR", value: "typeof " },
-      { type: "SYMBOL", value: "a" }
+      { type: "SYMBOL", value: "a" },
     ]);
 
     expect(tokenize("a...1")).toEqual([
       { type: "SYMBOL", value: "a" },
       { type: "OPERATOR", value: "..." },
-      { type: "VALUE", value: "1" }
+      { type: "VALUE", value: "1" },
     ]);
 
     expect(tokenize("a in b")).toEqual([
       { type: "SYMBOL", value: "a" },
       { type: "OPERATOR", value: "in " },
-      { type: "SYMBOL", value: "b" }
+      { type: "SYMBOL", value: "b" },
     ]);
   });
 
@@ -76,7 +76,7 @@ describe("tokenizer", () => {
     expect(tokenize('"hello ged"')).toEqual([{ type: "VALUE", value: '"hello ged"' }]);
     expect(tokenize('"hello ged"}')).toEqual([
       { type: "VALUE", value: '"hello ged"' },
-      { type: "RIGHT_BRACE", value: "}" }
+      { type: "RIGHT_BRACE", value: "}" },
     ]);
     expect(tokenize('"hello \\"ged\\""')).toEqual([{ type: "VALUE", value: '"hello \\"ged\\""' }]);
   });

tests/router/__snapshots__/link.test.ts.snap

@@ -7,16 +7,16 @@ exports[`Link component can render simple cases 1`] = `
     let utils = this.constructor.utils;
     let scope = Object.create(context);
     let h = this.h;
-    let _4 = utils.toObj({'router-link-active':scope['isActive']});
-    let _5 = scope['href'];
-    let c6 = [], p6 = {key:6,attrs:{href: _5},class:_4,on:{}};
-    let vn6 = h('a', p6, c6);
-    extra.handlers['click__7__'] = extra.handlers['click__7__'] || function (e) {if (!context.__owl__.isMounted){return}utils.getComponent(context)['navigate'](e);};
-    p6.on['click'] = extra.handlers['click__7__'];
-    const slot8 = this.constructor.slots[context.__owl__.slotId + '_' + 'default'];
-    if (slot8) {
-        slot8.call(this, context.__owl__.scope, Object.assign({}, extra, {parentNode: c6, parent: extra.parent || context}));
+    let _5 = utils.toObj({'router-link-active':scope['isActive']});
+    let _6 = scope['href'];
+    let c7 = [], p7 = {key:7,attrs:{href: _6},class:_5,on:{}};
+    let vn7 = h('a', p7, c7);
+    extra.handlers['click__8__'] = extra.handlers['click__8__'] || function (e) {if (!context.__owl__.isMounted){return}utils.getComponent(context)['navigate'](e);};
+    p7.on['click'] = extra.handlers['click__8__'];
+    const slot9 = this.constructor.slots[context.__owl__.slotId + '_' + 'default'];
+    if (slot9) {
+        slot9.call(this, context.__owl__.scope, Object.assign({}, extra, {parentNode: c7, parent: extra.parent || context}));
     }
-    return vn6;
+    return vn7;
 }"
 `;

tests/router/link.test.ts

@@ -37,7 +37,7 @@ describe("Link component", () => {
 
     const routes = [
       { name: "about", path: "/about" },
-      { name: "users", path: "/users" }
+      { name: "users", path: "/users" },
     ];
 
     router = new TestRouter(env, routes, { mode: "history" });
@@ -71,7 +71,7 @@ describe("Link component", () => {
 
     const routes = [
       { name: "about", path: "/about" },
-      { name: "users", path: "/users" }
+      { name: "users", path: "/users" },
     ];
 
     router = new TestRouter(env, routes, { mode: "history" });
@@ -81,7 +81,7 @@ describe("Link component", () => {
 
     expect(window.location.pathname).toBe("/users");
     var evt = new MouseEvent("click", {
-      button: 1
+      button: 1,
     });
 
     fixture.querySelector("a")!.dispatchEvent(evt);

tests/router/route_component.test.ts

@@ -41,7 +41,7 @@ describe("RouteComponent", () => {
 
     const routes = [
       { name: "about", path: "/about", component: About },
-      { name: "users", path: "/users", component: Users }
+      { name: "users", path: "/users", component: Users },
     ];
 
     router = new TestRouter(env, routes, { mode: "history" });

tests/router/router.test.ts

@@ -21,7 +21,7 @@ describe("router miscellaneous", () => {
   test("validate routes shape", () => {
     expect(() => {
       router = new TestRouter(env, [
-        { name: "someroute", path: "/some/path", redirect: { abc: "hey" } as Destination }
+        { name: "someroute", path: "/some/path", redirect: { abc: "hey" } as Destination },
       ]);
     }).toThrow(`Invalid destination: {"abc":"hey"}`);
   });
@@ -133,7 +133,7 @@ describe("getRouteParams", () => {
   test("match some parameterized routes", () => {
     router = new TestRouter(env, []);
     expect(router["getRouteParams"]({ path: "/invoices/{{id}}" } as Route, "/invoices/3")).toEqual({
-      id: "3"
+      id: "3",
     });
   });
 
@@ -141,7 +141,7 @@ describe("getRouteParams", () => {
     router = new TestRouter(env, [], { mode: "hash" });
     expect(router["getRouteParams"]({ path: "/invoices/{{id}}" } as Route, "#/invoices/3")).toEqual(
       {
-        id: "3"
+        id: "3",
       }
     );
   });
@@ -151,7 +151,7 @@ describe("getRouteParams", () => {
     expect(
       router["getRouteParams"]({ path: "/invoices/{{id.number}}" } as Route, "/invoices/3")
     ).toEqual({
-      id: 3
+      id: 3,
     });
   });
 
@@ -160,7 +160,7 @@ describe("getRouteParams", () => {
     expect(
       router["getRouteParams"]({ path: "/invoices/{{id.number}}" } as Route, "#/invoices/3")
     ).toEqual({
-      id: 3
+      id: 3,
     });
   });
 });
@@ -169,7 +169,7 @@ describe("redirect", () => {
   test("can redirect to other route", async () => {
     router = new TestRouter(env, [
       { name: "routea", path: "/some/path" },
-      { name: "routeb", path: "/some/other/path", redirect: { to: "routea" } }
+      { name: "routeb", path: "/some/other/path", redirect: { to: "routea" } },
     ]);
 
     await router.start();
@@ -182,7 +182,7 @@ describe("redirect", () => {
   test("can redirect to other path", async () => {
     router = new TestRouter(env, [
       { name: "routea", path: "/some/path" },
-      { name: "routeb", path: "/some/other/path", redirect: { path: "/some/path" } }
+      { name: "routeb", path: "/some/other/path", redirect: { path: "/some/path" } },
     ]);
     router.navigate = jest.fn(router.navigate);
 
@@ -214,7 +214,7 @@ describe("beforeRouteEnter", () => {
     const guard = jest.fn(() => false);
     router = new TestRouter(env, [
       { name: "routea", path: "/some/patha" },
-      { name: "routeb", path: "/some/pathb", beforeRouteEnter: guard }
+      { name: "routeb", path: "/some/pathb", beforeRouteEnter: guard },
     ]);
 
     await router.start();
@@ -235,7 +235,7 @@ describe("beforeRouteEnter", () => {
     router = new TestRouter(env, [
       { name: "routea", path: "/some/patha" },
       { name: "routeb", path: "/some/pathb", beforeRouteEnter: guard },
-      { name: "routec", path: "/some/pathc" }
+      { name: "routec", path: "/some/pathc" },
     ]);
 
     await router.start();
@@ -255,7 +255,7 @@ describe("beforeRouteEnter", () => {
     });
     router = new TestRouter(env, [
       { name: "landing", path: "/", beforeRouteEnter: guard },
-      { name: "otherroute", path: "/some/other/route" }
+      { name: "otherroute", path: "/some/other/route" },
     ]);
 
     expect(window.location.pathname).toBe("/");

tests/store.test.ts

@@ -8,7 +8,7 @@ describe("basic use", () => {
     const actions = {
       inc({ state }, delta) {
         state.n += delta;
-      }
+      },
     };
     const store = new Store({ state, actions });
 
@@ -25,7 +25,7 @@ describe("basic use", () => {
         state.n1 += delta1;
         state.n2 += delta2;
         state.n3 += delta3;
-      }
+      },
     };
     const store = new Store({ state, actions });
 
@@ -47,7 +47,7 @@ describe("basic use", () => {
       },
       inc100({ dispatch }) {
         dispatch("inc", 100);
-      }
+      },
     };
     const store = new Store({ state, actions });
 
@@ -61,7 +61,7 @@ describe("basic use", () => {
     const actions = {
       inc({ state }) {
         return ++state.n;
-      }
+      },
     };
     const store = new Store({ state, actions });
 
@@ -87,7 +87,7 @@ describe("basic use", () => {
       async setTo10({ dispatch }) {
         await Promise.resolve();
         dispatch("setN", 10);
-      }
+      },
     };
     const store = new Store({ state, actions });
 
@@ -115,7 +115,7 @@ describe("basic use", () => {
         await Promise.resolve();
         dispatch("setN", 10);
         return 5;
-      }
+      },
     };
     const store = new Store({ state, actions });
 
@@ -132,7 +132,7 @@ describe("basic use", () => {
     const actions = {
       someaction({ env }) {
         expect(env).toBe(someEnv);
-      }
+      },
     };
     const store = new Store({ state: {}, actions, env: someEnv });
 
@@ -145,15 +145,15 @@ describe("basic use", () => {
         1: {
           id: 1,
           name: "bertinchamps",
-          tasterID: 1
-        }
+          tasterID: 1,
+        },
       },
       tasters: {
         1: {
           id: 1,
-          name: "aaron"
-        }
-      }
+          name: "aaron",
+        },
+      },
     };
     const getters: { [key: string]: Getter } = {
       beerTasterName({ state }, beerID) {
@@ -161,7 +161,7 @@ describe("basic use", () => {
       },
       bestBeerName({ state }) {
         return state.beers[1].name;
-      }
+      },
     };
     const store = new Store({ state, actions: {}, getters });
     expect(store.getters).toBeDefined();
@@ -176,15 +176,15 @@ describe("basic use", () => {
         1: {
           id: 1,
           name: "bertinchamps",
-          tasterID: 1
-        }
+          tasterID: 1,
+        },
       },
       tasters: {
         1: {
           id: 1,
-          name: "aaron"
-        }
-      }
+          name: "aaron",
+        },
+      },
     };
     const getters = {
       beerTasterName({ state }, beerID) {
@@ -192,14 +192,14 @@ describe("basic use", () => {
       },
       bestBeerName({ state }) {
         return state.beers[1].name;
-      }
+      },
     };
     const actions = {
       action({ getters }) {
         expect(getters).toBeDefined();
         expect(getters.bestBeerName()).toBe("bertinchamps");
         expect(getters.beerTasterName(1)).toBe("aaron");
-      }
+      },
     };
     const store = new Store({ state, actions, getters });
     store.dispatch("action");
@@ -215,7 +215,7 @@ describe("basic use", () => {
       },
       c({}, i) {
         return `c${i}`;
-      }
+      },
     };
     const store = new Store({ getters, state: {}, actions: {} });
 
@@ -226,7 +226,7 @@ describe("basic use", () => {
 describe("advanced state properties", () => {
   test("state in the store is reference equal after mutation", async () => {
     const actions = {
-      donothing() {}
+      donothing() {},
     };
     const store = new Store({ state: {}, actions });
     const state = store.state;
@@ -242,7 +242,7 @@ describe("advanced state properties", () => {
         expect(state.a.length).toBe(3);
         const l = state.a.push(53);
         expect(l).toBe(4);
-      }
+      },
     };
     const store = new Store({ state, actions });
     store.dispatch("m");
@@ -253,11 +253,11 @@ describe("advanced state properties", () => {
     const actions = {
       dosomething({ state }) {
         Object.assign(state.westmalle, { a: 3, b: 4 });
-      }
+      },
     };
     const store = new Store({
       state: { westmalle: { a: 1, b: 2 } },
-      actions
+      actions,
     });
     store.dispatch("dosomething");
     expect(store.state.westmalle).toEqual({ a: 3, b: 4 });
@@ -267,7 +267,7 @@ describe("advanced state properties", () => {
     const actions = {
       inc({ state }) {
         state.counter++;
-      }
+      },
     };
     const state = { counter: 0 };
     const store = new Store({ state, actions });
@@ -284,7 +284,7 @@ describe("updates triggered by the store", () => {
     const actions = {
       inc({ state }, delta) {
         state.n += delta;
-      }
+      },
     };
     const store = new Store({ state, actions });
     store.on("update", null, () => updateCounter++);
@@ -308,7 +308,7 @@ describe("updates triggered by the store", () => {
       noop2({ state }) {
         const val = state.n;
         state.n = val;
-      }
+      },
     };
     const store = new Store({ state, actions });
     store.on("update", null, () => updateCounter++);

tests/store_hooks.test.ts

@@ -1,5 +1,5 @@
 import { Component, Env } from "../src/component/component";
-import { Store, useStore, useDispatch, useGetters } from "../src/store";
+import { Store, useStore, useDispatch, useGetters, EnvWithStore } from "../src/store";
 import { useState } from "../src/hooks";
 import { xml } from "../src/tags";
 import { shallowEqual } from "../src/utils";
@@ -25,7 +25,7 @@ describe("connecting a component to store", () => {
     const actions = {
       addTodo({ state }, msg) {
         state.todos.push({ msg, id: nextId++ });
-      }
+      },
     };
     const store = new Store({ state, actions });
 
@@ -34,7 +34,7 @@ describe("connecting a component to store", () => {
             <div>
                 <span t-foreach="todos" t-key="todo.id" t-as="todo"><t t-esc="todo.msg"/></span>
             </div>`;
-      todos = useStore(state => state.todos);
+      todos = useStore((state) => state.todos);
     }
 
     (<any>env).store = store;
@@ -56,7 +56,7 @@ describe("connecting a component to store", () => {
       },
       setNotNull({ state }) {
         state.nullValue = "ok";
-      }
+      },
     };
     const store = new Store({ state, actions });
 
@@ -70,15 +70,15 @@ describe("connecting a component to store", () => {
       nullValue: string;
       constructor() {
         super();
-        this.isBoolean = useStore(state => state.isBoolean, {
-          onUpdate: isBoolean => {
+        this.isBoolean = useStore((state) => state.isBoolean, {
+          onUpdate: (isBoolean) => {
             this.isBoolean = isBoolean;
-          }
+          },
         });
-        this.nullValue = useStore(state => state.nullValue, {
-          onUpdate: nullValue => {
+        this.nullValue = useStore((state) => state.nullValue, {
+          onUpdate: (nullValue) => {
             this.nullValue = nullValue;
-          }
+          },
         });
       }
     }
@@ -105,15 +105,15 @@ describe("connecting a component to store", () => {
     class App extends Component {
       static template = xml`<div t-esc="mapAdd"/>`;
       storeProps = {
-        array: useStore(state => {
+        array: useStore((state) => {
           if (state.useSmallArray) {
             return state.smallerArray;
           }
           return state.biggerArray;
-        })
+        }),
       };
       get mapAdd() {
-        return this.storeProps.array.map(a => {
+        return this.storeProps.array.map((a) => {
           return a + 1;
         });
       }
@@ -133,7 +133,7 @@ describe("connecting a component to store", () => {
   test("throw error if no store is found", async () => {
     class App extends Component {
       static template = xml`<div></div>`;
-      todos = useStore(state => state.todos);
+      todos = useStore((state) => state.todos);
     }
 
     let error;
@@ -153,7 +153,7 @@ describe("connecting a component to store", () => {
 
     class App extends Component {
       static template = xml`<div/>`;
-      storeState = useStore(state => state.a);
+      storeState = useStore((state) => state.a);
     }
 
     (<any>env).store = store;
@@ -170,7 +170,7 @@ describe("connecting a component to store", () => {
       doSomething({ state }) {
         state.a = 2;
         state.b = 3;
-      }
+      },
     };
     const store = new Store({ state, actions });
 
@@ -180,8 +180,8 @@ describe("connecting a component to store", () => {
                 <span t-esc="a.value"/>
                 <span t-esc="b.value"/>
             </div>`;
-      a = useStore(state => ({ value: state.a }));
-      b = useStore(state => ({ value: state.b }));
+      a = useStore((state) => ({ value: state.a }));
+      b = useStore((state) => ({ value: state.b }));
     }
     App.prototype.__render = jest.fn(App.prototype.__render);
 
@@ -204,7 +204,7 @@ describe("connecting a component to store", () => {
     const actions = {
       addTodo({ state }, msg) {
         state.todos.push({ msg, id: nextId++ });
-      }
+      },
     };
     const store = new Store({ state, actions });
 
@@ -213,7 +213,7 @@ describe("connecting a component to store", () => {
             <div>
                 <span t-foreach="todos" t-key="todo.id" t-as="todo"><t t-esc="todo.msg"/></span>
             </div>`;
-      todos = useStore(state => state.todos);
+      todos = useStore((state) => state.todos);
     }
     App.prototype.__render = jest.fn(App.prototype.__render);
 
@@ -241,13 +241,13 @@ describe("connecting a component to store", () => {
     const actions = {
       addTodo({ state }, msg) {
         state.todos.push({ msg, id: nextId++ });
-      }
+      },
     };
     const store = new Store({ state, actions });
 
     class App extends Component {
       static template = xml`<div><t t-esc="nbrTodos.value"/></div>`;
-      nbrTodos = useStore(state => ({ value: state.todos.length }));
+      nbrTodos = useStore((state) => ({ value: state.todos.length }));
     }
 
     (<any>env).store = store;
@@ -270,12 +270,12 @@ describe("connecting a component to store", () => {
       },
       incrementA({ state }) {
         state.a++;
-      }
+      },
     };
     const store = new Store({ state, actions });
     class App extends Component {
       static template = xml`<div><t t-esc="nbrTodos.value"/></div>`;
-      nbrTodos = useStore(state => ({ value: state.todos.length }), { isEqual: shallowEqual });
+      nbrTodos = useStore((state) => ({ value: state.todos.length }), { isEqual: shallowEqual });
     }
     App.prototype.__render = jest.fn(App.prototype.__render);
 
@@ -303,7 +303,7 @@ describe("connecting a component to store", () => {
     const actions = {
       addTodo({ state }, msg) {
         state.todos.push({ msg, id: nextId++ });
-      }
+      },
     };
     const store = new Store({ state, actions });
 
@@ -312,7 +312,7 @@ describe("connecting a component to store", () => {
             <div>
                 <span t-foreach="todos" t-key="todo.id" t-as="todo"><t t-esc="todo.msg"/></span>
             </div>`;
-      todos = useStore(state => state.todos, { store });
+      todos = useStore((state) => state.todos, { store });
     }
 
     const app = new App();
@@ -331,8 +331,8 @@ describe("connecting a component to store", () => {
       actions: {
         inc({ state }) {
           state.value++;
-        }
-      }
+        },
+      },
     });
     (<any>env).store = store;
 
@@ -342,7 +342,7 @@ describe("connecting a component to store", () => {
               <button t-on-click="dispatch('inc')">Inc</button>
               <span><t t-esc="storeState.value"/></span>
           </div>`;
-      storeState = useStore(state => state);
+      storeState = useStore((state) => state);
       dispatch = useDispatch();
     }
     const app = new App();
@@ -360,15 +360,15 @@ describe("connecting a component to store", () => {
     const state = {
       todos: [
         { id: 1, text: "jupiler" },
-        { id: 2, text: "chimay" }
-      ]
+        { id: 2, text: "chimay" },
+      ],
     };
     const store = new Store({ state, actions: {} });
 
     class TodoItem extends Component {
       static template = xml`<span><t t-esc="todo.text"/></span>`;
       todo = useStore((state, props) => {
-        return state.todos.find(t => t.id === props.todoId);
+        return state.todos.find((t) => t.id === props.todoId);
       });
     }
 
@@ -395,14 +395,14 @@ describe("connecting a component to store", () => {
     const actions = {
       addTodo({ state }, text) {
         state.todos.push({ text, id: nextId++ });
-      }
+      },
     };
     const store = new Store({ state, actions });
 
     class TodoItem extends Component {
       static template = xml`<span><t t-esc="todo.text"/></span>`;
       todo = useStore((state, props) => {
-        return state.todos.find(t => t.id === props.id);
+        return state.todos.find((t) => t.id === props.id);
       });
     }
 
@@ -412,7 +412,7 @@ describe("connecting a component to store", () => {
           <TodoItem t-foreach="todos" t-as="todo" id="todo.id" t-key="todo.id"/>
         </div>`;
       static components = { TodoItem };
-      todos = useStore(state => state.todos);
+      todos = useStore((state) => state.todos);
     }
 
     (<any>env).store = store;
@@ -431,16 +431,16 @@ describe("connecting a component to store", () => {
       importantID: 1,
       todos: [
         { id: 1, text: "jupiler" },
-        { id: 2, text: "bertinchamps" }
-      ]
+        { id: 2, text: "bertinchamps" },
+      ],
     };
     const getters = {
       importantTodoText({ state }) {
-        return state.todos.find(todo => todo.id === state.importantID).text;
+        return state.todos.find((todo) => todo.id === state.importantID).text;
       },
       text({ state }, id) {
-        return state.todos.find(todo => todo.id === id).text;
-      }
+        return state.todos.find((todo) => todo.id === id).text;
+      },
     };
     const store = new Store({ state, getters });
 
@@ -452,10 +452,10 @@ describe("connecting a component to store", () => {
         </div>`;
       getters = useGetters();
       storeProps = useStore((state, props) => {
-        const todo = state.todos.find(t => t.id === props.id);
+        const todo = state.todos.find((t) => t.id === props.id);
         return {
           activeTodoText: this.getters.text(todo.id),
-          importantTodoText: this.getters.importantTodoText()
+          importantTodoText: this.getters.importantTodoText(),
         };
       });
     }
@@ -468,7 +468,7 @@ describe("connecting a component to store", () => {
             <TodoItem id="todo.id" t-key="todo.id"/>
           </t>
         </div>`;
-      todos = useStore(state => state.todos);
+      todos = useStore((state) => state.todos);
     }
 
     (<any>env).store = store;
@@ -513,13 +513,13 @@ describe("connecting a component to store", () => {
         </div>`;
 
       // we have here a new object
-      data = useStore(state => ({ beers: state.beers, otherKey: 1 }));
+      data = useStore((state) => ({ beers: state.beers, otherKey: 1 }));
     }
 
     const actions = {
       addBeer({ state }, name) {
         state.beers.push({ name });
-      }
+      },
     };
 
     const state = { beers: [{ name: "jupiler" }] };
@@ -542,9 +542,9 @@ describe("connecting a component to store", () => {
     class Beer extends Component {
       static template = xml`<span><t t-esc="beer.name"/></span>`;
       beer = useStore((state, props) => state.beers[props.id], {
-        onUpdate: result => {
+        onUpdate: (result) => {
           ++counter;
-        }
+        },
       });
     }
 
@@ -558,7 +558,7 @@ describe("connecting a component to store", () => {
     const actions = {
       renameBeer({ state }, { id, name }) {
         state.beers[id].name = name;
-      }
+      },
     };
     const store = new Store({ state, actions });
     (<any>env).store = store;
@@ -609,7 +609,7 @@ describe("connecting a component to store", () => {
       data = useStore((state, props) => ({
         selected: state.beers[props.id],
         consumed: state.beers[state.consumedID] || null,
-        taster: state.taster
+        taster: state.taster,
       }));
     }
 
@@ -622,14 +622,14 @@ describe("connecting a component to store", () => {
     const actions = {
       consume({ state }, beerId) {
         state.consumedID = beerId;
-      }
+      },
     };
     const state = {
       beers: {
-        1: { name: "jupiler" }
+        1: { name: "jupiler" },
       },
       consumedID: null,
-      taster: "aaron"
+      taster: "aaron",
     };
     const store = new Store({ state, actions });
     (<any>env).store = store;
@@ -665,11 +665,11 @@ describe("connecting a component to store", () => {
                 <span t-if="info.selected">selected:<t t-esc="info.selected.name"/></span>
                 <span t-if="info.consumed">consumed:<t t-esc="info.consumed.name"/></span>
             </div>`;
-      info = useStore(function(state, props) {
+      info = useStore(function (state, props) {
         return {
           selected: state.beers[props.id],
           consumed: state.beers[state.consumedID] || null,
-          taster: state.taster
+          taster: state.taster,
         };
       });
     }
@@ -689,14 +689,14 @@ describe("connecting a component to store", () => {
       },
       renameBeer({ state }, { beerId, name }) {
         state.beers[beerId].name = name;
-      }
+      },
     };
     const state = {
       beers: {
-        1: { name: "jupiler" }
+        1: { name: "jupiler" },
       },
       consumedID: null,
-      taster: "aaron"
+      taster: "aaron",
     };
     const store = new Store({ state, actions });
     (<any>env).store = store;
@@ -747,11 +747,11 @@ describe("connecting a component to store", () => {
     const actions = {
       setValue({ state }, val) {
         state.x.val = val;
-      }
+      },
     };
     class Parent extends Component {
       static template = xml`<div><t t-esc="x.val"/></div>`;
-      x = useStore(state => {
+      x = useStore((state) => {
         return Object.assign({}, state.x);
       });
       dispatch = useDispatch();
@@ -782,11 +782,11 @@ describe("connecting a component to store", () => {
       static template = xml`<div><Child key="state.current"/></div>`;
       static components = { Child };
 
-      state = useStore(state => {
+      state = useStore((state) => {
         steps.push("parent");
         return {
           current: state.current,
-          isvisible: state.isvisible
+          isvisible: state.isvisible,
         };
       });
     }
@@ -795,7 +795,7 @@ describe("connecting a component to store", () => {
     const actions = {
       setCurrent({ state }, c) {
         state.current = c;
-      }
+      },
     };
 
     const store = new Store({ state, actions });
@@ -831,7 +831,7 @@ describe("connecting a component to store", () => {
                 <Child t-if="state.flag" someId="state.someId"/>
             </div>`;
       static components = { Child };
-      state = useStore(s => {
+      state = useStore((s) => {
         steps.push("parent");
         return { flag: s.flag, someId: s.someId };
       });
@@ -846,7 +846,7 @@ describe("connecting a component to store", () => {
     const actions = {
       setFlagToFalse({ state }) {
         state.flag = false;
-      }
+      },
     };
 
     const store = new Store({ state, actions });
@@ -874,18 +874,18 @@ describe("connecting a component to store", () => {
     const actions = {
       editTodo({ state }) {
         state.todos[1].title = "abc";
-      }
+      },
     };
     const todos = { 1: { id: 1, title: "kikoou" } };
     const state = {
-      todos
+      todos,
     };
     const store = new Store({
       state,
-      actions
+      actions,
     });
 
-    class TodoItem extends Component {
+    class TodoItem extends Component<{}, EnvWithStore> {
       static template = xml`
             <div class="todo">
                 <t t-esc="state.todo.title"/>
@@ -894,7 +894,7 @@ describe("connecting a component to store", () => {
       state = useStore((state, props) => {
         steps.push("item:usestore");
         return {
-          todo: state.todos[props.id]
+          todo: state.todos[props.id],
         };
       });
 
@@ -914,7 +914,7 @@ describe("connecting a component to store", () => {
                 </t>
             </div>`;
       static components = { TodoItem };
-      state = useStore(state => {
+      state = useStore((state) => {
         steps.push("app:usestore");
         return { todos: state.todos };
       });
@@ -947,18 +947,18 @@ describe("connecting a component to store", () => {
     const actions = {
       removeTodo({ state }) {
         delete state.todos[1];
-      }
+      },
     };
     const todos = { 1: { id: 1, title: "kikoou" } };
     const state = {
-      todos
+      todos,
     };
     const store = new Store({
       state,
-      actions
+      actions,
     });
 
-    class TodoItem extends Component {
+    class TodoItem extends Component<{}, EnvWithStore> {
       static template = xml`
             <div class="todo">
                 <t t-esc="state.todo.title"/>
@@ -967,7 +967,7 @@ describe("connecting a component to store", () => {
       state = useStore((state, props) => {
         steps.push("item:usestore");
         return {
-          todo: state.todos[props.id]
+          todo: state.todos[props.id],
         };
       });
 
@@ -988,7 +988,7 @@ describe("connecting a component to store", () => {
                 </t>
             </div>`;
       static components = { TodoItem };
-      state = useStore(state => {
+      state = useStore((state) => {
         steps.push("app:usestore");
         return { todos: state.todos };
       });
@@ -1016,7 +1016,7 @@ describe("connecting a component to store", () => {
       "item:usestore",
       "item:render",
       "app:usestore",
-      "app:render"
+      "app:render",
     ]);
     expect(fixture.innerHTML).toBe('<div class="todoapp"></div>');
   });
@@ -1026,7 +1026,7 @@ describe("connecting a component to store", () => {
 
     class App extends Component {
       static template = xml`<div><t t-esc="store.msg"/></div>`;
-      store = useStore(s => ({ msg: s.msg }));
+      store = useStore((s) => ({ msg: s.msg }));
 
       willPatch() {
         steps.push("willpatch");
@@ -1040,7 +1040,7 @@ describe("connecting a component to store", () => {
     const actions = {
       setMsg({ state }, c) {
         state.msg = c;
-      }
+      },
     };
 
     const store = new Store({ state, actions });
@@ -1061,7 +1061,7 @@ describe("connecting a component to store", () => {
 
     class Child extends Component {
       static template = xml`<div><t t-esc="store.val"/></div>`;
-      store = useStore(s => s);
+      store = useStore((s) => s);
     }
 
     class Parent extends Component {
@@ -1099,7 +1099,7 @@ describe("connecting a component to store", () => {
 
     class Child extends Component {
       static template = xml`<div><t t-esc="store.val"/></div>`;
-      store = useStore(s => {
+      store = useStore((s) => {
         steps.push("child selector");
         return s;
       });
@@ -1107,7 +1107,7 @@ describe("connecting a component to store", () => {
     class Parent extends Component {
       static template = xml`<div><Child t-if="store.child" /></div>`;
       static components = { Child };
-      store = useStore(s => {
+      store = useStore((s) => {
         steps.push("parent selector");
         return s;
       });
@@ -1118,7 +1118,7 @@ describe("connecting a component to store", () => {
     const actions = {
       toggleChild({ state }) {
         state.child = !state.child;
-      }
+      },
     };
     const store = new Store({ state, actions });
     (<any>env).store = store;
@@ -1137,18 +1137,18 @@ describe("connecting a component to store", () => {
   test("dispatch an action", async () => {
     class App extends Component {
       static template = xml`<div><t t-esc="store.counter"/></div>`;
-      store = useStore(state => state);
+      store = useStore((state) => state);
       dispatch = useDispatch();
     }
 
     const state = {
-      counter: 0
+      counter: 0,
     };
 
     const actions = {
       inc({ state }) {
         return ++state.counter;
-      }
+      },
     };
 
     const store = new Store({ state, actions });
@@ -1185,21 +1185,21 @@ describe("various scenarios", () => {
         await Promise.resolve();
         delete state.attachments[100];
         state.messages[10].attachmentIds = [];
-      }
+      },
     };
     const state = {
       attachments: {
         100: {
           id: 100,
-          name: "text.txt"
-        }
+          name: "text.txt",
+        },
       },
       messages: {
         10: {
           attachmentIds: [100],
-          id: 10
-        }
-      }
+          id: 10,
+        },
+      },
     };
     const store = new Store({ actions, state });
 
@@ -1220,7 +1220,7 @@ describe("various scenarios", () => {
                 <Attachment t-foreach="store.attachmentIds" t-key="attachmentId" t-as="attachmentId" id="attachmentId"/>
             </div>`;
 
-      store = useStore(state => ({ attachmentIds: state.messages[10].attachmentIds }));
+      store = useStore((state) => ({ attachmentIds: state.messages[10].attachmentIds }));
       static components = { Attachment };
       state = { isAttachmentDeleted: false };
       dispatch = useDispatch();

tests/tooling/debug_script_1.test.ts

@@ -20,7 +20,7 @@ debugOwl(owl, {});
 test("can log full lifecycle", async () => {
   const steps: string[] = [];
   const log = console.log;
-  console.log = arg => steps.push(arg);
+  console.log = (arg) => steps.push(arg);
 
   class Child extends Component {
     static template = xml`<div>child</div>`;
@@ -51,7 +51,7 @@ test("can log full lifecycle", async () => {
     "[OWL_DEBUG] Child<id=2> rendering template",
     "[OWL_DEBUG] Parent<id=1> willPatch",
     "[OWL_DEBUG] Child<id=2> mounted",
-    "[OWL_DEBUG] Parent<id=1> patched"
+    "[OWL_DEBUG] Parent<id=1> patched",
   ]);
   console.log = log;
 });

tests/tooling/debug_script_2.test.ts

@@ -19,7 +19,7 @@ debugOwl(owl, { logScheduler: true });
 test("can log scheduler start and stop", async () => {
   const steps: string[] = [];
   const log = console.log;
-  console.log = arg => steps.push(arg);
+  console.log = (arg) => steps.push(arg);
 
   class Child extends Component {
     static template = xml`<div>child</div>`;
@@ -44,7 +44,7 @@ test("can log scheduler start and stop", async () => {
     "[OWL_DEBUG] Child<id=2> rendering template",
     "[OWL_DEBUG] Child<id=2> mounted",
     "[OWL_DEBUG] Parent<id=1> mounted",
-    "[OWL_DEBUG] scheduler: stop running tasks queue"
+    "[OWL_DEBUG] scheduler: stop running tasks queue",
   ]);
   console.log = log;
 });

tests/tooling/debug_script_3.test.ts

@@ -19,7 +19,7 @@ debugOwl(owl, { logScheduler: true });
 test("log a specific message for render method calls if component is not mounted", async () => {
   const steps: string[] = [];
   const log = console.log;
-  console.log = arg => steps.push(arg);
+  console.log = (arg) => steps.push(arg);
 
   class Parent extends Component {
     static template = xml`<div><t t-esc="state.value"/></div>`;
@@ -40,7 +40,7 @@ test("log a specific message for render method calls if component is not mounted
     "[OWL_DEBUG] Parent<id=1> mounted",
     "[OWL_DEBUG] scheduler: stop running tasks queue",
     "[OWL_DEBUG] Parent<id=1> willUnmount",
-    "[OWL_DEBUG] Parent<id=1> render (warning: component is not mounted, this render has no effect)"
+    "[OWL_DEBUG] Parent<id=1> render (warning: component is not mounted, this render has no effect)",
   ]);
   console.log = log;
 });

tests/tooling/debug_script_4.test.ts

@@ -19,7 +19,7 @@ debugOwl(owl, { logScheduler: true });
 test("log a sub component with non stringifiable props", async () => {
   const steps: string[] = [];
   const log = console.log;
-  console.log = arg => steps.push(arg);
+  console.log = (arg) => steps.push(arg);
 
   class Child extends Component {
     static template = xml`<span><t t-esc="props.obj.val"/></span>`;
@@ -51,7 +51,7 @@ test("log a sub component with non stringifiable props", async () => {
     "[OWL_DEBUG] Parent<id=1> mounted",
     "[OWL_DEBUG] scheduler: stop running tasks queue",
     "[OWL_DEBUG] Parent<id=1> willUnmount",
-    "[OWL_DEBUG] Child<id=2> willUnmount"
+    "[OWL_DEBUG] Child<id=2> willUnmount",
   ]);
   console.log = log;
 });

tests/tooling/doc_link_checker.test.ts

@@ -60,14 +60,14 @@ function getFiles(path: string[] = []): FileData[] {
   if (path.length === 0) {
     const baseFiles: FileData[] = [
       { name: "README.md", path: [], links: [], sections: [], fullName: "README.md" },
-      { name: "roadmap.md", path: [], links: [], sections: [], fullName: "roadmap.md" }
+      { name: "roadmap.md", path: [], links: [], sections: [], fullName: "roadmap.md" },
     ];
     const rest = getFiles(["doc"]);
     const result = baseFiles.concat(rest);
     result.forEach(addMardownData);
     return result;
   }
-  const files = fs.readdirSync(path.join("/"), { withFileTypes: true }).map(f => {
+  const files = fs.readdirSync(path.join("/"), { withFileTypes: true }).map((f) => {
     if (f.isDirectory()) {
       return getFiles(path.concat(f.name));
     }
@@ -78,8 +78,8 @@ function getFiles(path: string[] = []): FileData[] {
         path,
         links: [],
         sections: [],
-        fullName
-      }
+        fullName,
+      },
     ];
   });
   return Array.prototype.concat(...files);
@@ -127,7 +127,7 @@ export function isLinkValid(link: MarkDownLink, current: FileData, files: FileDa
   }
 
   // Step 4: check if there is a matching file
-  let target: FileData | undefined = files.find(f => f.fullName === linkFullName);
+  let target: FileData | undefined = files.find((f) => f.fullName === linkFullName);
   if (!target) {
     return false;
   }
@@ -135,7 +135,7 @@ export function isLinkValid(link: MarkDownLink, current: FileData, files: FileDa
   // Step 5: if necessary, check if there is a corresponding link inside the target
   // link name
   if (hash) {
-    if (!target.sections.find(s => s.slug === hash)) {
+    if (!target.sections.find((s) => s.slug === hash)) {
       return false;
     }
   }
@@ -153,7 +153,7 @@ function slugify(str) {
     .toLowerCase()
     .replace(/\//g, "") // remove /
     .replace(/\s+/g, "-") // Replace spaces with -
-    .replace(p, c => b.charAt(a.indexOf(c))) // Replace special characters
+    .replace(p, (c) => b.charAt(a.indexOf(c))) // Replace special characters
     .replace(/&/g, "-and-") // Replace & with ‘and’
     .replace(/[^\w\-]+/g, "") // Remove all non-word characters
     .replace(/\-\-+/g, "-") // Replace multiple - with single -

tests/utils.test.ts

@@ -1,4 +1,5 @@
 import { escape, debounce } from "../src/utils";
+import { browser } from "../src/browser";
 
 describe("escape", () => {
   test("normal strings", () => {
@@ -15,6 +16,10 @@ describe("escape", () => {
 describe("debounce", () => {
   test("works as expected", () => {
     jest.useFakeTimers();
+    // need to reset them on browser because they were mocked in window, but not
+    // on browser object
+    browser.setTimeout = window.setTimeout.bind(window);
+    browser.clearTimeout = window.clearTimeout.bind(window);
     let n = 0;
     let f = debounce(() => n++, 100);
     expect(n).toBe(0);

tools/playground/samples.js

@@ -1169,7 +1169,7 @@ const RESPONSIVE_CSS = `body {
 const SLOTS = `// We show here how slots can be used to create generic components.
 // In this example, the Card component is basically only a container. It is not
 // aware of its content. It just knows where it should be (with t-slot).
-// The parent component define the content with t-set.
+// The parent component define the content with t-set-slot.
 //
 // Note that the t-on-click event, defined in the App template, is executed in
 // the context of the App component, even though it is inside the Card component
@@ -1235,15 +1235,15 @@ const SLOTS_XML = `<templates>
 
   <div t-name="App" class="main">
     <Card title="'Title card A'">
-      <t t-set="content">Content of card 1...  [<t t-esc="state.a"/>]</t>
-      <t t-set="footer"><button t-on-click="inc('a', 1)">Increment A</button></t>
+      <t t-set-slot="content">Content of card 1...  [<t t-esc="state.a"/>]</t>
+      <t t-set-slot="footer"><button t-on-click="inc('a', 1)">Increment A</button></t>
     </Card>
     <Card title="'Title card B'">
-      <t t-set="content">
+      <t t-set-slot="content">
         <div>Card 2... [<t t-esc="state.b"/>]</div>
         <Counter />
       </t>
-      <t t-set="footer"><button t-on-click="inc('b', -1)">Decrement B</button></t>
+      <t t-set-slot="footer"><button t-on-click="inc('b', -1)">Decrement B</button></t>
     </Card>
   </div>
 </templates>`;

tools/release.js

@@ -3,10 +3,9 @@ const readline = require("readline");
 const fs = require("fs");
 const exec = require("child_process").exec;
 const chalk = require("chalk");
-const GitHub = require("github-api");
 
 const REL_NOTES_FILE = `release-notes.md`;
-const STEPS = 10;
+const STEPS = 8;
 
 const rl = readline.createInterface({
   input: process.stdin,
@@ -28,7 +27,8 @@ async function startRelease() {
   // ---------------------------------------------------------------------------
   log(`Step 1/${STEPS}: collecting info...`);
   const current = package.version;
-  const next = await ask("Next version: ");
+  let next = await ask("Next version: ");
+  if (next[0] === 'v') next = next.substring(1);
   let file = await ask(`Release notes (${REL_NOTES_FILE}): `);
   file = file || REL_NOTES_FILE;
   let content;
@@ -39,11 +39,12 @@ async function startRelease() {
     log("Cannot find release notes... Aborting");
     return;
   }
-
-  // Todo: add playground update feature
-  // let shouldUpdateStr = await ask("Update Playground? (y/n)");
-  // const shouldUpdatePlayground = shouldUpdateStr === "y";
-  const token = await ask("Github token: ");
+  let shouldBeDraft = await ask(`Should be a draft [y/n] ? (n)`);
+  let draft = ""
+  if (shouldBeDraft.toLowerCase() === 'y')
+  {
+    draft = "--draft";
+  }
 
   // ---------------------------------------------------------------------------
   log(`Step 2/${STEPS}: running tests...`);
@@ -52,14 +53,12 @@ async function startRelease() {
     log("Test suite does not pass. Aborting.");
     return;
   }
-  await ask("Ready for next step...");
 
   // ---------------------------------------------------------------------------
   log(`Step 3/${STEPS}: updating package.json, readme.md and roadmap.md...`);
   await replaceInFile("./package.json", current, next);
   await replaceInFile("./README.md", current, next);
   await replaceInFile("./roadmap.md", current, next);
-  await ask("Ready for next step...");
 
   // ---------------------------------------------------------------------------
   log(`Step 4/${STEPS}: creating git commit...`);
@@ -68,62 +67,40 @@ async function startRelease() {
     log("Git commit failed. Aborting.");
     return;
   }
-  await ask("Ready for next step...");
 
-  // -------------------j--------------------------------------------------------
-  log(`Step 5/${STEPS}: building owl (iife version)...`);
+  // ----------------------------------------------------------------------------
+  log(`Step 5/${STEPS}: building owl...`);
+  await execCommand("npm run prettier");
   const buildResult = await execCommand("npm run build");
   if (buildResult !== 0) {
     log("Build failed. Aborting.");
     return;
   }
-  await ask("Ready for next step...");
 
   // ---------------------------------------------------------------------------
-  log(`Step 6/${STEPS}: minifying owl...`);
-  const minifyResult = await execCommand("npm run minify");
-  if (minifyResult !== 0) {
-    log("Minify failed. Aborting.");
-    return;
-  }
-  await ask("Ready for next step...");
-
-  // ---------------------------------------------------------------------------
-  log(`Step 7/${STEPS}: pushing on github...`);
+  log(`Step 6/${STEPS}: pushing on github...`);
   const pushResult = await execCommand("git push");
   if (pushResult !== 0) {
     log("git push failed. Aborting.");
     return;
   }
-  await ask("Ready for next step...");
 
   // ---------------------------------------------------------------------------
-  log(`Step 8/${STEPS}: publishing release notes on github...`);
-  const options = {
-    tag_name: `v${next}`,
-    name: `v${next}`,
-    body: content,
-    draft: true // todo: remove this someday
-  };
-  const result = await createRelease(token, options);
-  console.log(result);
-  await ask("Ready for next step...");
 
-  // ---------------------------------------------------------------------------
-  log(`Step 9/${STEPS}: adding assets to release...`);
-  await ask("Please add owl.js and owl.min.js to draft release, then confirm");
-  // todo: do this with curl
-  // curl \
-  //   -H "Authorization: token $GITHUB_TOKEN" \
-  //   -H "Content-Type: $(file -b --mime-type $FILE)" \
-  //   --data-binary @$FILE \
-  //   "https://uploads.github.com/repos/hubot/singularity/releases/123/assets?name=$(basename $FILE)"
+  log('Step 7/${STEPS}: Creating the release...');
+  const relaseResult = await execCommand(`gh release create v${next} dist/*.js ${draft} -F release-notes.md`);
+  if (relaseResult !== 0) {
+    log("github release failed. Aborting.");
+    return;
+  }
 
-  // ---------------------------------------------------------------------------
-  log(`Step 10/${STEPS}: publishing module on npm...`);
+  log(`Step 8/${STEPS}: publishing module on npm...`);
   await execCommand("npm run publish");
-
+  
   log("Owl Release process completed! Thank you for your patience");
+  await execCommand(`gh release view`);
+  await execCommand(`gh release view -w`);
+
 }
 
 // -----------------------------------------------------------------------------
@@ -200,16 +177,3 @@ async function replaceInFile(file, from, to) {
     });
   });
 }
-
-function createRelease(token, options) {
-  return new Promise((resolve, reject) => {
-    var gh = new GitHub({ token });
-    gh.getRepo("odoo", "owl").createRelease(options, (err, result, req) => {
-      if (err) {
-        reject(err);
-      } else {
-        resolve(result);
-      }
-    });
-  });
-}

tools/server.py

@@ -14,9 +14,9 @@ URL = 'http://{0}:{1}/tools'.format(HOST, PORT)
 # With this, we can simply copy the playground folder as is in the gh-page when
 # we want to update the playground.
 class OWLHandler(SimpleHTTPRequestHandler):
-    def do_GET(self):
+    def do_GET(self): 
         if self.path == '/tools/owl.js':
-            self.path = '/dist/owl.js'
+            self.path = '/dist/owl.iife.js'
         return SimpleHTTPRequestHandler.do_GET(self)
 
     def end_headers(self):

tsconfig.json

@@ -1,20 +1,107 @@
 {
+  /**
+   ** Commented-out options have their default values.
+   **/
+  "include": [
+    "src/**/*.ts",
+    "src/*.ts"
+  ],
+                                                                // "exclude": [],
+  // "files": [],                                               // A list of relative or absolute file paths to include.
+  // "extends": "",                                             // A string containing a path to another configuration file to inherit from.
+  // "references": [],                                          // An array of objects `{"path": "./to/dirOrConfig"}` that specifies projects to reference.
+  // "compileOnSave": false,                                    // Signals to the IDE to generate all files for a given tsconfig.json upon saving.
   "compilerOptions": {
-    "module": "commonjs",
-    "preserveConstEnums": true,
-    "noImplicitThis": true,
-    "removeComments": false,
-    "declaration": true,
-    "target": "esnext",
-    "outDir": "dist",
-    "alwaysStrict": true,
-    "noUnusedLocals": true,
-    "noUnusedParameters": false,
-    "noImplicitReturns": true,
-    "noFallthroughCasesInSwitch": true,
-    "strictPropertyInitialization": true,
-    "strictNullChecks": true,
-    "declarationDir": "dist/types"
-  },
-  "include": ["src/**/*.ts","src/*.ts"]
+                                                                // Main options
+    "target": "esnext",                                         // Specify ECMAScript target version: 'es3' (default), 'es5', 'es2015', 'es2016', 'es2017','es2018' or 'esnext'.
+    "module": "esnext",                                         // Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'.
+    // "lib": ["esnext", "dom"],                                // Specify library files to be included in the compilation.
+    // "allowJs": false,                                        // Allow javascript files to be compiled.
+    // "checkJs": false,                                        // Report errors in .js files.
+    // "outFile": "./",                                         // Concatenate and emit output to single file.
+    "outDir": "dist",                                           // Redirect output structure to the directory.
+    // "rootDir": "./",                                         // Specify the root directory of input files. Use to control the output directory structure with `--outDir`.
+    // "project": "",                                           // Compile a project given a valid configuration file.
+                                                                // Compilation options
+    // "composite": true,                                       // Enable project compilation
+    // "diagnostics": false,                                    // Show diagnostic information.
+    // "incremental": true,                                     // Enable incremental compilation by reading/writing information from prior compilations to a file on disk.
+    // "isolatedModules": false,                                // Transpile each file as a separate module (similar to 'ts.transpileModule').
+    // "listEmittedFiles": false,                               // Print names of generated files part of the compilation.
+    // "listFiles": true,                                       // Print names of files part of the compilation.
+    // "noErrorTruncation": false,                              // Do not truncate error messages.
+    // "preserveWatchOutput": false,                            // Keep outdated console output in watch mode instead of clearing the screen.
+    // "traceResolution": false,                                // Enable tracing of the name resolution process.
+    // "tsBuildInfoFile": ".tsbuildinfo",                       // Specify file to store incremental compilation information.
+                                                                // Strict typechecking options
+    // "strict": false,                                         // Enable all strict type-checking options.
+    // "noImplicitAny": true,                                   // Raise error on expressions and declarations with an implied 'any' type.
+    // "noImplicitThis": true,                                  // Raise error on 'this' expressions with an implied 'any' type.
+    // "strictBindCallApply": true,                             // Enable stricter checking of of the `bind`, `call`, and `apply` methods on functions.
+    // "strictFunctionTypes": true,                             // Disable bivariant parameter checking for function types.
+    // "strictNullChecks": true,                                // In strict null checking mode, the null and undefined values are not in the domain of every type and are only assignable to themselves and any.
+    // "strictPropertyInitialization": true,                    // Ensure non-undefined class properties are initialized in the constructor. This option requires `--strictNullChecks` be enabled in order to take effect.
+    // "alwaysStrict": true,                                    // Parse in strict mode and emit "use strict" for each source file.
+                                                                // Additional checks
+    // "allowUnreachableCode": false,                           // Do not report errors on unreachable code.
+    // "allowUnusedLabels": false,                              // Do not report errors on unused labels.
+    "forceConsistentCasingInFileNames": true,                   // Disallow inconsistently-cased references to the same file.
+    // "noStrictGenericChecks": false,                          // Disable strict checking of generic signatures in function types.
+    "noUnusedLocals": true,                                     // Report errors on unused locals.
+    "noUnusedParameters": false,                                // Report errors on unused parameters.
+    "noImplicitReturns": true,                                  // Report error when not all code paths in function return a value.
+    "noFallthroughCasesInSwitch": true,                         // Report errors for fallthrough cases in switch statement.
+    // "skipLibCheck": false,                                   // Skip type checking of all declaration files (*.d.ts).
+    // "suppressExcessPropertyErrors": false,                   // Suppress excess property checks for object literals.
+    // "suppressImplicitAnyIndexErrors": false,                 // Suppress noImplicitAny errors for indexing objects lacking index signatures.
+                                                                // Module resolution options
+    "moduleResolution": "node",                                 // Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6).
+    // "baseUrl": "./",                                         // Base directory to resolve non-absolute module names.
+    // "paths": {},                                             // A series of entries which re-map imports to lookup locations relative to the 'baseUrl'.
+    // "rootDirs": [],                                          // List of root folders whose combined content represents the structure of the project at runtime.
+    // "typeRoots": [],                                         // List of folders to include type definitions from.
+    "types": [
+      "jest",
+      "node"
+    ],                                                // Type declaration files to be included in compilation.
+    // "allowSyntheticDefaultImports": false                    // Allow default imports from modules with no default export. This does not affect code emit, just typechecking.
+    "esModuleInterop": true,                                    // Emit '__importStar' and '__importDefault' helpers for runtime babel ecosystem compatibility and enable '--allowSyntheticDefaultImports' for typesystem compatibility.
+    // "maxNodeModuleJsDepth": 0,                               // The maximum dependency depth to search under node_modules and load JavaScript files. Only applicable with --allowJs.
+    // "preserveSymlinks": false,                               // Do not resolve the real path of symlinks.
+    "resolveJsonModule": true,                                  // Include modules imported with '.json' extension.
+                                                                // Emit options
+    "declaration": true,                                        // Generates corresponding '.d.ts' file.
+    "declarationDir": "dist/types",                             // Output directory for generated declaration files.
+    // "declarationMap": false,                                 // Generates a sourcemap for each corresponding '.d.ts' file.
+    // "emitBOM": false,                                        // Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files.
+    // "emitDeclarationOnly": false,                            // Only emit ‘.d.ts’ declaration files.
+    // "importHelpers": false,                                  // Import emit helpers from 'tslib'.
+    // "newLine": "LF",                                         // Use the specified end of line sequence to be used when emitting files: "crlf" (windows) or "lf" (unix).”
+    // "noEmit": true,                                          // Do not emit outputs.
+    // "noEmitHelpers": false,                                  // Do not generate custom helper functions like __extends in compiled output.
+    // "noEmitOnError": false,                                  // Do not emit outputs if any errors were reported.
+    // "noImplicitUseStrict": false,                            // Do not emit "use strict" directives in module output.
+    // "noResolve": false,                                      // Do not add triple-slash references or module import targets to the list of compiled files.
+    "preserveConstEnums": true,                                 // Do not erase const enum declarations in generated code.
+    // "removeComments": false,                                 // Remove all comments except copy-right header comments beginning with 
+    // "experimentalDecorators": true,                          // Enables experimental support for ES7 decorators.
+    // "emitDecoratorMetadata": true,                           // Enables experimental support for emitting type metadata for decorators.
+                                                                // Source map options
+    // "sourceMap": false,                                      // Generates corresponding '.map' file.
+    // "sourceRoot": "",                                        // Specify the location where debugger should locate TypeScript files instead of source locations.
+    // "mapRoot": "",                                           // Specify the location where debugger should locate map files instead of generated locations.
+    // "inlineSourceMap": true,                                 // Emit a single file with source maps instead of having a separate file.
+    // "inlineSources": true,                                   // Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set.
+                                                                // JSX options
+    // "jsx": "preserve",                                       // Specify JSX code generation: 'preserve', 'react-native', or 'react'.
+    // "jsxFactory": "React.createElement",                     // Specify the JSX factory function to use when targeting react JSX emit, e.g. 'React.createElement' or 'h'.
+                                                                // Other options
+    // "allowUmdGlobalAccess": true,                            // Allow accessing UMD globals from modules.
+    // "charset": "utf8",                                       // The character set of the input files.
+    // "downlevelIteration": false,                             // Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'.
+    // "disableSizeLimit": false,                               // Disable size limitation on JavaScript project.
+    // "keyofStringsOnly": false,                               // Resolve 'keyof' to string valued property names only (no numbers or symbols).
+    // "noLib": false,                                          // Do not include the default library file (lib.d.ts).
+    // "pretty": true,                                          // Stylize errors and messages using color and context.
+  }
 }