[REL] v2.4.0

# v2.4.0

 - [IMP] owl: add basic support for sub roots
 - [IMP] make set of timeout-able hooks (and their timeouts) clearer by using a const map
 - [IMP] devtools: add support for file urls on chrome

.gitignore

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

doc/readme.md

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

doc/reference/app.md

@@ -6,6 +6,7 @@
 - [API](#api)
 - [Configuration](#configuration)
 - [`mount` helper](#mount-helper)
+- [Roots](#roots)
 - [Loading templates](#loading-templates)
 
 ## Overview
@@ -61,6 +62,8 @@ The `config` object is an object with some of the following keys:
   templates (see [translations](translations.md))
 - **`templates (string | xml document)`**: all the templates that will be used by
   the components created by the application.
+- **`getTemplate ((s: string) => Element | Function | string | void)`**: a function that will be called by owl when it
+  needs a template. If undefined is returned, owl looks into the app templates.
 - **`warnIfNoStaticProps (boolean, default=false)`**: if true, Owl will log a warning
   whenever it encounters a component that does not provide a [static props description](props.md#props-validation).
 
@@ -90,6 +93,33 @@ Most of the time, the `mount` helper is more convenient, but whenever one needs
 a reference to the actual Owl App, then using the `App` class directly is
 possible.
 
+## Roots
+
+An application can have multiple roots. It is sometimes useful to instantiate
+sub components in places that are not managed by Owl, such as an html editor
+with dynamic content (the Knowledge application in Odoo).
+
+To create a root, one can use the `createRoot` method, which takes two arguments:
+
+- **`Component`**: a component class (Root component of the app)
+- **`config (optional)`**: a config object that may contain a `props` object or a
+  `env` object.
+
+The `createRoot` method returns an object with a `mount` method (same API as
+the `App.mount` method), and a `destroy` method.
+
+```js
+const root = app.createRoot(MyComponent, { props: { someProps: true } });
+await root.mount(targetElement);
+
+// later
+root.destroy();
+```
+
+Note that, like with owl `App`, it is the responsibility of the code that created
+the root to properly destroy it (before it has been removed from the DOM!). Owl
+has no way of doing it itself.
+
 ## Loading templates
 
 Most applications will need to load templates whenever they start. Here is

doc/reference/component.md

@@ -357,7 +357,7 @@ cleaning operation, since the component may be destroyed before it has even been
 mounted. The `willDestroy` hook is useful in that situation, since it is always
 called.
 
-The `onWillUnmount` hook is used to register a function that will be executed at
+The `onWillDestroy` hook is used to register a function that will be executed at
 this moment:
 
 ```javascript

doc/reference/error_handling.md

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

doc/reference/hooks.md

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

doc/reference/props.md

@@ -140,6 +140,28 @@ class SomeComponent extends Component {
 The `.bind` suffix also implies `.alike`, so these props will not cause additional
 renderings.
 
+## Translatable props
+
+When you need to pass a user-facing string to a subcomponent, you likely want it
+to be translated. Unfortunately, because props are arbitrary expressions, it wouldn't
+be practical for Owl to find out which parts of the expression are strings and translate
+them, and it also makes it difficult for tooling to extract these strings to generate
+terms to translate. While you can work around this issue by doing the translation in
+JavaScript, or by using `t-set` with a body (the body of `t-set` is translated),
+and passing the variable as a prop, this is a sufficiently common use case that Owl
+provides a suffix for this purpose: `.translate`.
+
+```xml
+<t t-name="ParentComponent">
+    <Child someProp.translate="some message"/>
+</t>
+```
+
+Note that the content of this attribute is _NOT_ treated as a JavaScript expression:
+it is treated as a string, as if it was an attribute on an HTML element, and translated
+before being passed to the component. If you need to interpolate some data into the
+string, you will still have to do this in JavaScript.
+
 ## Dynamic Props
 
 The `t-props` directive can be used to specify totally dynamic props:
@@ -238,7 +260,7 @@ 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],
@@ -276,7 +298,8 @@ class ComponentB extends owl.Component {
         id: Number,
         name: {type: String, optional: true},
         url: String
-      ]},    // object, with keys id (number), name (string, optional) and url (string)
+      }
+    },  // object, with keys id (number), name (string, optional) and url (string)
     someObj3: {
       type: Object,
       values: { type: Array, element: String },

doc/reference/reactivity.md

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

doc/reference/slots.md

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

doc/reference/utils.md

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

doc/tools/devtools_guide.md

@@ -35,13 +35,13 @@ The components tab is separated into two sub windows: the components tree in the
 the component details in the right. The components tree will display all the different
 components that are present in the tab in the form of a tree. The root of this tree is
 actually the app which is not a component but can still be inspected by the devtools like
-one. There can also be multiple apps loaded in the page like in the following:
+one. There can also be multiple apps loaded in the page like in website:
 
 <img src="screenshots/multi_apps.png"/>
 
 There is a convenient search bar at the top of the components tree which will help finding
 the components tou want in the tree and also, an element picker can be used to directly select
-the component you want to focus on in the page which is especially useful when trying to find
+the component you want to focus on in the page which is especially useful when 1trying to find
 what you want. Just click on the elements picker icon and click on the element you want to focus
 on in the page and it will be selected in the devtools accordingly. Hovering any element in the
 page in this mode will highlight it and the same happens anytime in the components tree.
@@ -64,25 +64,18 @@ as its env, props, observed states and all the other variables that are present
 While the props and the env are already present on the actual instance of the component and are
 pretty explicit by themselves, the observed state value is a bit more complicated to grasp.
 
-The observed state is actually information about which variables are observed by the component
-which will trigger a rerender of the component when it is modified. The keys represent which part of the
-variable is actually observed and the target is the actual variable. For simplicity, the properties
-that are not observed by the component are greyed out while the others are in bold. This means that
-editing bold ones will trigger a rerender while the greyed out ones will not.
+The observed state is actually information about which variables are being observed by the component:
+when any property of a reactive object is being read by the component, the component will subscribe
+to this property which means it will listen to any change that can occur on the property and render
+when such a change occurs. This can be visualized easily within the devtools inside of the observed
+state section: observed properties of the reactive object(s) are displayed in bold while the others
+are greyed out. Do keep in mind that a greyed out property in the observed state of one component
+may be observed by another and the other way around is also possible. Here is an example for some
+user Field component:
 
 <img src="screenshots/states.png"/>
 
-In the given example, we have two keys/target pairs for two different variables. The first one indicates
-that adding or removing an element to the array will trigger a rerender since the length will have changed.
-Replacing the element at index 0, 1 or 2 will also have the same effect as implied by the keys. It doesn't
-mean that editing the properties of element at index 0, 1 or 2 will rerender the component though. It may
-be the case for some but this will be described in another keys/target pair. The second keys/target pair
-is actually the element at index 0 of the first pair. It only has id in the keys meaning that only the
-id property will actually trigger a rerender the component when modified. Be aware however that the other
-properties may be in the observed state of another component like a child one in this case. A greyed out
-property only implies it is not reactive for the selected component and not for the others.
-
-The navigation inside the properties is also similar to the one in console variables: properties have
+Navigation inside the properties is also similar to the one in console variables: properties have
 their prototype displayed and getters will get their value when clicked on (...). It is also possible to
 send any property to the console using the right-click context menu on it and functions can be inspected
 in the sources tab as well.
@@ -96,8 +89,10 @@ component's name. Using the left click on the component's name will focus it in
 It is also possible to edit any of the leaf node properties. To do so, you must double click on the
 property's value and modify it using the freshly created input then press enter to apply the changes.
 Do note that the modified values should be written in JSON format in order to be valid (examples:
-89, "yes", undefined, null, \["hello", 15\], {"a": 1}, true, ...). Whether it has an impact on the
-component or not and whether it produces an error is the responsability of the user.
+89, "yes", undefined, null, \["hello", 15\], {"a": 1}, true, ...). Editing any value will produce a
+manual render of the component (or the root component of the application in the case of env values).
+Whether the edition has an impact on the component or not and whether it produces an error is the
+responsability of the user.
 
 <img src="screenshots/edit.png"/>
 
@@ -117,7 +112,8 @@ are intercepted by the devtools using the record button.
 The second button is used to clear all the events that have been recorded. The select can be used to
 switch between the tree view (which shows the causality between renders) and the events log view which
 simply displays the events in the exact order they were triggered. In this view, you can expand the create,
-update and destroy events which reveals the component that initiated the event.
+update and destroy events which reveals the component that initiated the event. Also, a transition line will
+appear each time a new animation frame has been loaded between events.
 
 <img src="screenshots/events_log.png"/>
 
@@ -131,20 +127,29 @@ There is also the Trace Renderings and Trace Subscriptions features. These featu
 recording of events and have no effect on the profiler tab. The Trace Renderings option is used to log in
 the console all the render events and allows to show their traceback information. Similarly, the Trace
 Subscriptions option logs all the properties that caused a render event and also allows to see the traceback
-of the modification
+of the modification.
 
 <img src="screenshots/trace_rendering.png"/>
 <img src="screenshots/trace_subscriptions.png"/>
 
+The Owl Devtools also allow to inspect iframes coded in Owl: when an Owl iframe is detected in the page,
+the iframe selector will appear next to the tabs. This allows to switch from an iframe to another easily.
+Be aware that switching iframes will clear all record events from the profiler tab. Iframes detection is
+currently not working in the firefox version, we are aware of this issue and will try to address it in the
+future.
+
+<img src="screenshots/iframes.png"/>
+
 ## Options
 
 The owl devtools extension has a dark mode feature which defaults to your general devtools settings and can
-be toggled using the sun/moon icon at the top-right corner of the tab. All the examples above were created
-with the dark mode enabled. There is also a refresh button to completely reset the owl devtools.
+be toggled using the sun/moon icon at the top-right corner of the tab. There is also a refresh button to
+completely reset the owl devtools.
 
 <img src="screenshots/darkmode.png"/>
 
 ## Troubleshooting
 
-If the feedback from the page to the devtools seems to be cut, just close the devtools and refresh the page.
+If the feedback from the page to the devtools seems to be cut, you can first try to use the refresh
+button mentioned above but if it still doesn't seem to work, just close the devtools and refresh the page.
 This will eventually happen any time a tab stays opened for too long without being refreshed.

docs/owl.js

@@ -1850,8 +1850,9 @@ const NO_CALLBACK = () => {
 };
 const objectToString = Object.prototype.toString;
 const objectHasOwnProperty = Object.prototype.hasOwnProperty;
-const SUPPORTED_RAW_TYPES = new Set(["Object", "Array", "Set", "Map", "WeakMap"]);
-const COLLECTION_RAWTYPES = new Set(["Set", "Map", "WeakMap"]);
+// Use arrays because Array.includes is faster than Set.has for small arrays
+const SUPPORTED_RAW_TYPES = ["Object", "Array", "Set", "Map", "WeakMap"];
+const COLLECTION_RAW_TYPES = ["Set", "Map", "WeakMap"];
 /**
  * extract "RawType" from strings like "[object RawType]" => this lets us ignore
  * many native objects such as Promise (whose toString is [object Promise])
@@ -1874,7 +1875,7 @@ function canBeMadeReactive(value) {
     if (typeof value !== "object") {
         return false;
     }
-    return SUPPORTED_RAW_TYPES.has(rawType(value));
+    return SUPPORTED_RAW_TYPES.includes(rawType(value));
 }
 /**
  * Creates a reactive from the given object/callback if possible and returns it,
@@ -2044,7 +2045,7 @@ function reactive(target, callback = NO_CALLBACK) {
     const reactivesForTarget = reactiveCache.get(target);
     if (!reactivesForTarget.has(callback)) {
         const targetRawType = rawType(target);
-        const handler = COLLECTION_RAWTYPES.has(targetRawType)
+        const handler = COLLECTION_RAW_TYPES.includes(targetRawType)
             ? collectionsProxyHandler(target, callback, targetRawType)
             : basicProxyHandler(callback);
         const proxy = new Proxy(target, handler);
@@ -2073,7 +2074,7 @@ function basicProxyHandler(callback) {
         set(target, key, value, receiver) {
             const hadKey = objectHasOwnProperty.call(target, key);
             const originalValue = Reflect.get(target, key, receiver);
-            const ret = Reflect.set(target, key, value, receiver);
+            const ret = Reflect.set(target, key, toRaw(value), receiver);
             if (!hadKey && objectHasOwnProperty.call(target, key)) {
                 notifyReactives(target, KEYCHANGES);
             }
@@ -2177,7 +2178,7 @@ function delegateAndNotify(setterName, getterName, target) {
         if (hadKey !== hasKey) {
             notifyReactives(target, KEYCHANGES);
         }
-        if (originalValue !== value) {
+        if (originalValue !== target[getterName](key)) {
             notifyReactives(target, key);
         }
         return ret;
@@ -2597,42 +2598,47 @@ class ComponentNode {
 }
 
 const TIMEOUT = Symbol("timeout");
+const HOOK_TIMEOUT = {
+    onWillStart: 3000,
+    onWillUpdateProps: 3000,
+};
 function wrapError(fn, hookName) {
-    const error = new OwlError(`The following error occurred in ${hookName}: `);
-    const timeoutError = new OwlError(`${hookName}'s promise hasn't resolved after 3 seconds`);
+    const error = new OwlError();
+    const timeoutError = new OwlError();
     const node = getCurrent();
     return (...args) => {
         const onError = (cause) => {
             error.cause = cause;
-            if (cause instanceof Error) {
-                error.message += `"${cause.message}"`;
-            }
-            else {
-                error.message = `Something that is not an Error was thrown in ${hookName} (see this Error's "cause" property)`;
-            }
+            error.message =
+                cause instanceof Error
+                    ? `The following error occurred in ${hookName}: "${cause.message}"`
+                    : `Something that is not an Error was thrown in ${hookName} (see this Error's "cause" property)`;
             throw error;
         };
+        let result;
         try {
-            const result = fn(...args);
-            if (result instanceof Promise) {
-                if (hookName === "onWillStart" || hookName === "onWillUpdateProps") {
-                    const fiber = node.fiber;
-                    Promise.race([
-                        result.catch(() => { }),
-                        new Promise((resolve) => setTimeout(() => resolve(TIMEOUT), 3000)),
-                    ]).then((res) => {
-                        if (res === TIMEOUT && node.fiber === fiber) {
-                            console.warn(timeoutError);
-                        }
-                    });
-                }
-                return result.catch(onError);
-            }
-            return result;
+            result = fn(...args);
         }
         catch (cause) {
             onError(cause);
         }
+        if (!(result instanceof Promise)) {
+            return result;
+        }
+        const timeout = HOOK_TIMEOUT[hookName];
+        if (timeout) {
+            const fiber = node.fiber;
+            Promise.race([
+                result.catch(() => { }),
+                new Promise((resolve) => setTimeout(() => resolve(TIMEOUT), timeout)),
+            ]).then((res) => {
+                if (res === TIMEOUT && node.fiber === fiber && node.status <= 2) {
+                    timeoutError.message = `${hookName}'s promise hasn't resolved after ${timeout / 1000} seconds`;
+                    console.log(timeoutError);
+                }
+            });
+        }
+        return result.catch(onError);
     };
 }
 // -----------------------------------------------------------------------------
@@ -2998,15 +3004,13 @@ function prepareList(collection) {
         keys = [...collection.keys()];
         values = [...collection.values()];
     }
+    else if (Symbol.iterator in Object(collection)) {
+        keys = [...collection];
+        values = keys;
+    }
     else if (collection && typeof collection === "object") {
-        if (Symbol.iterator in collection) {
-            keys = [...collection];
-            values = keys;
-        }
-        else {
-            values = Object.values(collection);
-            keys = Object.keys(collection);
-        }
+        values = Object.values(collection);
+        keys = Object.keys(collection);
     }
     else {
         throw new OwlError(`Invalid loop expression: "${collection}" is not iterable`);
@@ -3161,8 +3165,14 @@ const helpers = {
     makeRefWrapper,
 };
 
-const bdom = { text, createBlock, list, multi, html, toggler, comment };
-function parseXML$1(xml) {
+/**
+ * Parses an XML string into an XML document, throwing errors on parser errors
+ * instead of returning an XML document containing the parseerror.
+ *
+ * @param xml the string to parse
+ * @returns an XML document corresponding to the content of the string
+ */
+function parseXML(xml) {
     const parser = new DOMParser();
     const doc = parser.parseFromString(xml, "text/xml");
     if (doc.getElementsByTagName("parsererror").length) {
@@ -3189,7 +3199,9 @@ function parseXML$1(xml) {
         throw new OwlError(msg);
     }
     return doc;
-}
+}
+
+const bdom = { text, createBlock, list, multi, html, toggler, comment };
 class TemplateSet {
     constructor(config = {}) {
         this.rawTemplates = Object.create(globalTemplates);
@@ -3199,14 +3211,26 @@ class TemplateSet {
         this.translateFn = config.translateFn;
         this.translatableAttributes = config.translatableAttributes;
         if (config.templates) {
-            this.addTemplates(config.templates);
+            if (config.templates instanceof Document || typeof config.templates === "string") {
+                this.addTemplates(config.templates);
+            }
+            else {
+                for (const name in config.templates) {
+                    this.addTemplate(name, config.templates[name]);
+                }
+            }
         }
+        this.getRawTemplate = config.getTemplate;
     }
     static registerTemplate(name, fn) {
         globalTemplates[name] = fn;
     }
     addTemplate(name, template) {
         if (name in this.rawTemplates) {
+            // this check can be expensive, just silently ignore double definitions outside dev mode
+            if (!this.dev) {
+                return;
+            }
             const rawTemplate = this.rawTemplates[name];
             const currentAsString = typeof rawTemplate === "string"
                 ? rawTemplate
@@ -3226,15 +3250,16 @@ class TemplateSet {
             // empty string
             return;
         }
-        xml = xml instanceof Document ? xml : parseXML$1(xml);
+        xml = xml instanceof Document ? xml : parseXML(xml);
         for (const template of xml.querySelectorAll("[t-name]")) {
             const name = template.getAttribute("t-name");
             this.addTemplate(name, template);
         }
     }
     getTemplate(name) {
+        var _a;
         if (!(name in this.templates)) {
-            const rawTemplate = this.rawTemplates[name];
+            const rawTemplate = ((_a = this.getRawTemplate) === null || _a === void 0 ? void 0 : _a.call(this, name)) || this.rawTemplates[name];
             if (rawTemplate === undefined) {
                 let extraInfo = "";
                 try {
@@ -3492,7 +3517,7 @@ function compileExprToArray(expr) {
     const localVars = new Set();
     const tokens = tokenize(expr);
     let i = 0;
-    let stack = []; // to track last opening [ or {
+    let stack = []; // to track last opening (, [ or {
     while (i < tokens.length) {
         let token = tokens[i];
         let prevToken = tokens[i - 1];
@@ -3501,10 +3526,12 @@ function compileExprToArray(expr) {
         switch (token.type) {
             case "LEFT_BRACE":
             case "LEFT_BRACKET":
+            case "LEFT_PAREN":
                 stack.push(token.type);
                 break;
             case "RIGHT_BRACE":
             case "RIGHT_BRACKET":
+            case "RIGHT_PAREN":
                 stack.pop();
         }
         let isVar = token.type === "SYMBOL" && !RESERVED_WORDS.includes(token.value);
@@ -3616,6 +3643,13 @@ function isProp(tag, key) {
     }
     return false;
 }
+/**
+ * Returns a template literal that evaluates to str. You can add interpolation
+ * sigils into the string if required
+ */
+function toStringExpression(str) {
+    return `\`${str.replace(/\\/g, "\\\\").replace(/`/g, "\\`").replace(/\$\{/, "\\${")}\``;
+}
 // -----------------------------------------------------------------------------
 // BlockDescription
 // -----------------------------------------------------------------------------
@@ -3796,15 +3830,14 @@ class CodeGenerator {
             mainCode.push(``);
             for (let block of this.blocks) {
                 if (block.dom) {
-                    let xmlString = block.asXmlString();
-                    xmlString = xmlString.replace(/\\/g, "\\\\").replace(/`/g, "\\`");
+                    let xmlString = toStringExpression(block.asXmlString());
                     if (block.dynamicTagName) {
-                        xmlString = xmlString.replace(/^<\w+/, `<\${tag || '${block.dom.nodeName}'}`);
-                        xmlString = xmlString.replace(/\w+>$/, `\${tag || '${block.dom.nodeName}'}>`);
-                        mainCode.push(`let ${block.blockName} = tag => createBlock(\`${xmlString}\`);`);
+                        xmlString = xmlString.replace(/^`<\w+/, `\`<\${tag || '${block.dom.nodeName}'}`);
+                        xmlString = xmlString.replace(/\w+>`$/, `\${tag || '${block.dom.nodeName}'}>\``);
+                        mainCode.push(`let ${block.blockName} = tag => createBlock(${xmlString});`);
                     }
                     else {
-                        mainCode.push(`let ${block.blockName} = createBlock(\`${xmlString}\`);`);
+                        mainCode.push(`let ${block.blockName} = createBlock(${xmlString});`);
                     }
                 }
             }
@@ -3982,7 +4015,7 @@ class CodeGenerator {
         const isNewBlock = !block || forceNewBlock;
         if (isNewBlock) {
             block = this.createBlock(block, "comment", ctx);
-            this.insertBlock(`comment(\`${ast.value}\`)`, block, {
+            this.insertBlock(`comment(${toStringExpression(ast.value)})`, block, {
                 ...ctx,
                 forceNewBlock: forceNewBlock && !block,
             });
@@ -4004,7 +4037,7 @@ class CodeGenerator {
         }
         if (!block || forceNewBlock) {
             block = this.createBlock(block, "text", ctx);
-            this.insertBlock(`text(\`${value}\`)`, block, {
+            this.insertBlock(`text(${toStringExpression(value)})`, block, {
                 ...ctx,
                 forceNewBlock: forceNewBlock && !block,
             });
@@ -4225,7 +4258,8 @@ class CodeGenerator {
             expr = compileExpr(ast.expr);
             if (ast.defaultValue) {
                 this.helpers.add("withDefault");
-                expr = `withDefault(${expr}, \`${ast.defaultValue}\`)`;
+                // FIXME: defaultValue is not translated
+                expr = `withDefault(${expr}, ${toStringExpression(ast.defaultValue)})`;
             }
         }
         if (!block || forceNewBlock) {
@@ -4478,7 +4512,7 @@ class CodeGenerator {
                 this.addLine(`${ctxVar}[zero] = ${bl};`);
             }
         }
-        const key = `key + \`${this.generateComponentKey()}\``;
+        const key = this.generateComponentKey();
         if (isDynamic) {
             const templateVar = generateId("template");
             if (!this.staticDefs.find((d) => d.id === "call")) {
@@ -4530,12 +4564,12 @@ class CodeGenerator {
         else {
             let value;
             if (ast.defaultValue) {
-                const defaultValue = ctx.translate ? this.translate(ast.defaultValue) : ast.defaultValue;
+                const defaultValue = toStringExpression(ctx.translate ? this.translate(ast.defaultValue) : ast.defaultValue);
                 if (ast.value) {
-                    value = `withDefault(${expr}, \`${defaultValue}\`)`;
+                    value = `withDefault(${expr}, ${defaultValue})`;
                 }
                 else {
-                    value = `\`${defaultValue}\``;
+                    value = defaultValue;
                 }
             }
             else {
@@ -4546,12 +4580,12 @@ class CodeGenerator {
         }
         return null;
     }
-    generateComponentKey() {
+    generateComponentKey(currentKey = "key") {
         const parts = [generateId("__")];
         for (let i = 0; i < this.target.loopLevel; i++) {
             parts.push(`\${key${i + 1}}`);
         }
-        return parts.join("__");
+        return `${currentKey} + \`${parts.join("__")}\``;
     }
     /**
      * Formats a prop name and value into a string suitable to be inserted in the
@@ -4565,7 +4599,12 @@ class CodeGenerator {
      * "onClick.bind"    "onClick"        "onClick: bind(ctx, ctx['onClick'])"
      */
     formatProp(name, value) {
-        value = this.captureExpression(value);
+        if (name.endsWith(".translate")) {
+            value = toStringExpression(this.translateFn(value));
+        }
+        else {
+            value = this.captureExpression(value);
+        }
         if (name.includes(".")) {
             let [_name, suffix] = name.split(".");
             name = _name;
@@ -4574,6 +4613,7 @@ class CodeGenerator {
                     value = `(${value}).bind(this)`;
                     break;
                 case "alike":
+                case "translate":
                     break;
                 default:
                     throw new OwlError("Invalid prop suffix");
@@ -4642,7 +4682,6 @@ class CodeGenerator {
             this.addLine(`${propVar}.slots = markRaw(Object.assign(${slotDef}, ${propVar}.slots))`);
         }
         // cmap key
-        const key = this.generateComponentKey();
         let expr;
         if (ast.isDynamic) {
             expr = generateId("Comp");
@@ -4658,7 +4697,7 @@ class CodeGenerator {
             // todo: check the forcenewblock condition
             this.insertAnchor(block);
         }
-        let keyArg = `key + \`${key}\``;
+        let keyArg = this.generateComponentKey();
         if (ctx.tKeyExpr) {
             keyArg = `${ctx.tKeyExpr} + ${keyArg}`;
         }
@@ -4731,7 +4770,7 @@ class CodeGenerator {
         }
         let key = this.target.loopLevel ? `key${this.target.loopLevel}` : "key";
         if (isMultiple) {
-            key = `${key} + \`${this.generateComponentKey()}\``;
+            key = this.generateComponentKey(key);
         }
         const props = ast.attrs ? this.formatPropObject(ast.attrs) : [];
         const scope = this.getPropString(props, dynProps);
@@ -4772,7 +4811,6 @@ class CodeGenerator {
         }
         let { block } = ctx;
         const name = this.compileInNewTarget("slot", ast.content, ctx);
-        const key = this.generateComponentKey();
         let ctxStr = "ctx";
         if (this.target.loopLevel || !this.hasSafeContext) {
             ctxStr = generateId("ctx");
@@ -4785,7 +4823,8 @@ class CodeGenerator {
             expr: `app.createComponent(null, false, true, false, false)`,
         });
         const target = compileExpr(ast.target);
-        const blockString = `${id}({target: ${target},slots: {'default': {__render: ${name}.bind(this), __ctx: ${ctxStr}}}}, key + \`${key}\`, node, ctx, Portal)`;
+        const key = this.generateComponentKey();
+        const blockString = `${id}({target: ${target},slots: {'default': {__render: ${name}.bind(this), __ctx: ${ctxStr}}}}, ${key}, node, ctx, Portal)`;
         if (block) {
             this.insertAnchor(block);
         }
@@ -4944,9 +4983,9 @@ function parseDOMNode(node, ctx) {
             const isSelect = tagName === "select";
             const isCheckboxInput = isInput && typeAttr === "checkbox";
             const isRadioInput = isInput && typeAttr === "radio";
-            const hasLazyMod = attr.includes(".lazy");
-            const hasNumberMod = attr.includes(".number");
             const hasTrimMod = attr.includes(".trim");
+            const hasLazyMod = hasTrimMod || attr.includes(".lazy");
+            const hasNumberMod = attr.includes(".number");
             const eventType = isRadioInput ? "click" : isSelect || hasLazyMod ? "change" : "input";
             model = {
                 baseExpr,
@@ -5277,14 +5316,14 @@ function parseComponent(node, ctx) {
             // be ignored)
             let el = slotNode.parentElement;
             let isInSubComponent = false;
-            while (el !== clone) {
+            while (el && el !== clone) {
                 if (el.hasAttribute("t-component") || el.tagName[0] === el.tagName[0].toUpperCase()) {
                     isInSubComponent = true;
                     break;
                 }
                 el = el.parentElement;
             }
-            if (isInSubComponent) {
+            if (isInSubComponent || !el) {
                 continue;
             }
             slotNode.removeAttribute("t-set-slot");
@@ -5492,41 +5531,6 @@ function normalizeTEscTOut(el) {
 function normalizeXML(el) {
     normalizeTIf(el);
     normalizeTEscTOut(el);
-}
-/**
- * Parses an XML string into an XML document, throwing errors on parser errors
- * instead of returning an XML document containing the parseerror.
- *
- * @param xml the string to parse
- * @returns an XML document corresponding to the content of the string
- */
-function parseXML(xml) {
-    const parser = new DOMParser();
-    const doc = parser.parseFromString(xml, "text/xml");
-    if (doc.getElementsByTagName("parsererror").length) {
-        let msg = "Invalid XML in template.";
-        const parsererrorText = doc.getElementsByTagName("parsererror")[0].textContent;
-        if (parsererrorText) {
-            msg += "\nThe parser has produced the following error message:\n" + parsererrorText;
-            const re = /\d+/g;
-            const firstMatch = re.exec(parsererrorText);
-            if (firstMatch) {
-                const lineNumber = Number(firstMatch[0]);
-                const line = xml.split("\n")[lineNumber - 1];
-                const secondMatch = re.exec(parsererrorText);
-                if (line && secondMatch) {
-                    const columnIndex = Number(secondMatch[0]) - 1;
-                    if (line[columnIndex]) {
-                        msg +=
-                            `\nThe error might be located at xml line ${lineNumber} column ${columnIndex}\n` +
-                                `${line}\n${"-".repeat(columnIndex - 1)}^`;
-                    }
-                }
-            }
-        }
-        throw new OwlError(msg);
-    }
-    return doc;
 }
 
 function compile(template, options = {}) {
@@ -5553,7 +5557,7 @@ function compile(template, options = {}) {
 }
 
 // do not modify manually. This file is generated by the release script.
-const version = "2.2.5";
+const version = "2.4.0";
 
 // -----------------------------------------------------------------------------
 //  Scheduler
@@ -5642,21 +5646,17 @@ const DEV_MSG = () => {
 This is not suitable for production use.
 See https://github.com/odoo/owl/blob/${hash}/doc/reference/app.md#configuration for more information.`;
 };
-window.__OWL_DEVTOOLS__ || (window.__OWL_DEVTOOLS__ = {
-    apps: new Set(),
-    Fiber: Fiber,
-    RootFiber: RootFiber,
-    toRaw: toRaw,
-    reactive: reactive,
-});
+const apps = new Set();
+window.__OWL_DEVTOOLS__ || (window.__OWL_DEVTOOLS__ = { apps, Fiber, RootFiber, toRaw, reactive });
 class App extends TemplateSet {
     constructor(Root, config = {}) {
         super(config);
         this.scheduler = new Scheduler();
+        this.subRoots = new Set();
         this.root = null;
         this.name = config.name || "";
         this.Root = Root;
-        window.__OWL_DEVTOOLS__.apps.add(this);
+        apps.add(this);
         if (config.test) {
             this.dev = true;
         }
@@ -5671,14 +5671,42 @@ class App extends TemplateSet {
         this.props = config.props || {};
     }
     mount(target, options) {
-        App.validateTarget(target);
-        if (this.dev) {
-            validateProps(this.Root, this.props, { __owl__: { app: this } });
+        const root = this.createRoot(this.Root, { props: this.props });
+        this.root = root.node;
+        this.subRoots.delete(root.node);
+        return root.mount(target, options);
+    }
+    createRoot(Root, config = {}) {
+        const props = config.props || {};
+        // hack to make sure the sub root get the sub env if necessary. for owl 3,
+        // would be nice to rethink the initialization process to make sure that
+        // we can create a ComponentNode and give it explicitely the env, instead
+        // of looking it up in the app
+        const env = this.env;
+        if (config.env) {
+            this.env = config.env;
         }
-        const node = this.makeNode(this.Root, this.props);
-        const prom = this.mountNode(node, target, options);
-        this.root = node;
-        return prom;
+        const node = this.makeNode(Root, props);
+        if (config.env) {
+            this.env = env;
+        }
+        this.subRoots.add(node);
+        return {
+            node,
+            mount: (target, options) => {
+                App.validateTarget(target);
+                if (this.dev) {
+                    validateProps(Root, props, { __owl__: { app: this } });
+                }
+                const prom = this.mountNode(node, target, options);
+                return prom;
+            },
+            destroy: () => {
+                this.subRoots.delete(node);
+                node.destroy();
+                this.scheduler.processTasks();
+            },
+        };
     }
     makeNode(Component, props) {
         return new ComponentNode(Component, props, this, null, null);
@@ -5710,10 +5738,13 @@ class App extends TemplateSet {
     }
     destroy() {
         if (this.root) {
+            for (let subroot of this.subRoots) {
+                subroot.destroy();
+            }
             this.root.destroy();
             this.scheduler.processTasks();
         }
-        window.__OWL_DEVTOOLS__.apps.delete(this);
+        apps.delete(this);
     }
     createComponent(name, isStatic, hasSlotsProp, hasDynamicPropList, propList) {
         const isDynamic = !isStatic;
@@ -5788,6 +5819,7 @@ class App extends TemplateSet {
     }
 }
 App.validateTarget = validateTarget;
+App.apps = apps;
 App.version = version;
 async function mount(C, target, config = {}) {
     return new App(C, config).mount(target, config);
@@ -5904,7 +5936,7 @@ function useChildSubEnv(envExtension) {
  *
  * @template T
  * @param {Effect<T>} effect the effect to run on component mount and/or patch
- * @param {()=>T} [computeDependencies=()=>[NaN]] a callback to compute
+ * @param {()=>[...T]} [computeDependencies=()=>[NaN]] a callback to compute
  *      dependencies that will decide if the effect needs to be cleaned up and
  *      run again. If the dependencies did not change, the effect will not run
  *      again. The default value returns an array containing only NaN because
@@ -5983,9 +6015,9 @@ TemplateSet.prototype._compileTemplate = function _compileTemplate(name, templat
     });
 };
 
-export { App, Component, EventBus, OwlError, __info__, blockDom, loadFile, markRaw, markup, mount, onError, onMounted, onPatched, onRendered, onWillDestroy, onWillPatch, onWillRender, onWillStart, onWillUnmount, onWillUpdateProps, reactive, status, toRaw, useChildSubEnv, useComponent, useEffect, useEnv, useExternalListener, useRef, useState, useSubEnv, validate, validateType, whenReady, xml };
+export { App, Component, EventBus, OwlError, __info__, batched, blockDom, loadFile, markRaw, markup, mount, onError, onMounted, onPatched, onRendered, onWillDestroy, onWillPatch, onWillRender, onWillStart, onWillUnmount, onWillUpdateProps, reactive, status, toRaw, useChildSubEnv, useComponent, useEffect, useEnv, useExternalListener, useRef, useState, useSubEnv, validate, validateType, whenReady, xml };
 
 
-__info__.date = '2023-08-07T10:26:30.557Z';
-__info__.hash = 'b25e988';
+__info__.date = '2024-09-30T08:49:29.420Z';
+__info__.hash = 'eb2b32a';
 __info__.url = 'https://github.com/odoo/owl';

docs/playground/playground.js

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

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@odoo/owl",
-  "version": "2.2.5",
+  "version": "2.4.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@odoo/owl",
-  "version": "2.2.5",
+  "version": "2.4.0",
   "description": "Odoo Web Library (OWL)",
   "main": "dist/owl.cjs.js",
   "module": "dist/owl.es.js",

src/common/utils.ts

@@ -0,0 +1,38 @@
+import { OwlError } from "./owl_error";
+
+/**
+ * Parses an XML string into an XML document, throwing errors on parser errors
+ * instead of returning an XML document containing the parseerror.
+ *
+ * @param xml the string to parse
+ * @returns an XML document corresponding to the content of the string
+ */
+export function parseXML(xml: string): XMLDocument {
+  const parser = new DOMParser();
+  const doc = parser.parseFromString(xml, "text/xml");
+  if (doc.getElementsByTagName("parsererror").length) {
+    let msg = "Invalid XML in template.";
+    const parsererrorText = doc.getElementsByTagName("parsererror")[0].textContent;
+    if (parsererrorText) {
+      msg += "\nThe parser has produced the following error message:\n" + parsererrorText;
+      const re = /\d+/g;
+      const firstMatch = re.exec(parsererrorText);
+      if (firstMatch) {
+        const lineNumber = Number(firstMatch[0]);
+        const line = xml.split("\n")[lineNumber - 1];
+        const secondMatch = re.exec(parsererrorText);
+        if (line && secondMatch) {
+          const columnIndex = Number(secondMatch[0]) - 1;
+          if (line[columnIndex]) {
+            msg +=
+              `\nThe error might be located at xml line ${lineNumber} column ${columnIndex}\n` +
+              `${line}\n${"-".repeat(columnIndex - 1)}^`;
+          }
+        }
+      }
+    }
+    throw new OwlError(msg);
+  }
+
+  return doc;
+}

src/compiler/code_generator.ts

@@ -82,6 +82,14 @@ function isProp(tag: string, key: string): boolean {
   return false;
 }
 
+/**
+ * Returns a template literal that evaluates to str. You can add interpolation
+ * sigils into the string if required
+ */
+function toStringExpression(str: string) {
+  return `\`${str.replace(/\\/g, "\\\\").replace(/`/g, "\\`").replace(/\$\{/, "\\${")}\``;
+}
+
 // -----------------------------------------------------------------------------
 // BlockDescription
 // -----------------------------------------------------------------------------
@@ -311,14 +319,13 @@ export class CodeGenerator {
       mainCode.push(``);
       for (let block of this.blocks) {
         if (block.dom) {
-          let xmlString = block.asXmlString();
-          xmlString = xmlString.replace(/\\/g, "\\\\").replace(/`/g, "\\`");
+          let xmlString = toStringExpression(block.asXmlString());
           if (block.dynamicTagName) {
-            xmlString = xmlString.replace(/^<\w+/, `<\${tag || '${block.dom.nodeName}'}`);
-            xmlString = xmlString.replace(/\w+>$/, `\${tag || '${block.dom.nodeName}'}>`);
-            mainCode.push(`let ${block.blockName} = tag => createBlock(\`${xmlString}\`);`);
+            xmlString = xmlString.replace(/^`<\w+/, `\`<\${tag || '${block.dom.nodeName}'}`);
+            xmlString = xmlString.replace(/\w+>`$/, `\${tag || '${block.dom.nodeName}'}>\``);
+            mainCode.push(`let ${block.blockName} = tag => createBlock(${xmlString});`);
           } else {
-            mainCode.push(`let ${block.blockName} = createBlock(\`${xmlString}\`);`);
+            mainCode.push(`let ${block.blockName} = createBlock(${xmlString});`);
           }
         }
       }
@@ -515,7 +522,7 @@ export class CodeGenerator {
     const isNewBlock = !block || forceNewBlock;
     if (isNewBlock) {
       block = this.createBlock(block, "comment", ctx);
-      this.insertBlock(`comment(\`${ast.value}\`)`, block, {
+      this.insertBlock(`comment(${toStringExpression(ast.value)})`, block, {
         ...ctx,
         forceNewBlock: forceNewBlock && !block,
       });
@@ -539,7 +546,7 @@ export class CodeGenerator {
 
     if (!block || forceNewBlock) {
       block = this.createBlock(block, "text", ctx);
-      this.insertBlock(`text(\`${value}\`)`, block, {
+      this.insertBlock(`text(${toStringExpression(value)})`, block, {
         ...ctx,
         forceNewBlock: forceNewBlock && !block,
       });
@@ -774,7 +781,8 @@ export class CodeGenerator {
       expr = compileExpr(ast.expr);
       if (ast.defaultValue) {
         this.helpers.add("withDefault");
-        expr = `withDefault(${expr}, \`${ast.defaultValue}\`)`;
+        // FIXME: defaultValue is not translated
+        expr = `withDefault(${expr}, ${toStringExpression(ast.defaultValue)})`;
       }
     }
     if (!block || forceNewBlock) {
@@ -1039,7 +1047,7 @@ export class CodeGenerator {
       }
     }
 
-    const key = `key + \`${this.generateComponentKey()}\``;
+    const key = this.generateComponentKey();
     if (isDynamic) {
       const templateVar = generateId("template");
       if (!this.staticDefs.find((d) => d.id === "call")) {
@@ -1091,11 +1099,13 @@ export class CodeGenerator {
     } else {
       let value: string;
       if (ast.defaultValue) {
-        const defaultValue = ctx.translate ? this.translate(ast.defaultValue) : ast.defaultValue;
+        const defaultValue = toStringExpression(
+          ctx.translate ? this.translate(ast.defaultValue) : ast.defaultValue
+        );
         if (ast.value) {
-          value = `withDefault(${expr}, \`${defaultValue}\`)`;
+          value = `withDefault(${expr}, ${defaultValue})`;
         } else {
-          value = `\`${defaultValue}\``;
+          value = defaultValue;
         }
       } else {
         value = expr;
@@ -1106,12 +1116,12 @@ export class CodeGenerator {
     return null;
   }
 
-  generateComponentKey() {
+  generateComponentKey(currentKey: string = "key") {
     const parts = [generateId("__")];
     for (let i = 0; i < this.target.loopLevel; i++) {
       parts.push(`\${key${i + 1}}`);
     }
-    return parts.join("__");
+    return `${currentKey} + \`${parts.join("__")}\``;
   }
 
   /**
@@ -1126,7 +1136,11 @@ export class CodeGenerator {
    * "onClick.bind"    "onClick"        "onClick: bind(ctx, ctx['onClick'])"
    */
   formatProp(name: string, value: string): string {
-    value = this.captureExpression(value);
+    if (name.endsWith(".translate")) {
+      value = toStringExpression(this.translateFn(value));
+    } else {
+      value = this.captureExpression(value);
+    }
     if (name.includes(".")) {
       let [_name, suffix] = name.split(".");
       name = _name;
@@ -1135,6 +1149,7 @@ export class CodeGenerator {
           value = `(${value}).bind(this)`;
           break;
         case "alike":
+        case "translate":
           break;
         default:
           throw new OwlError("Invalid prop suffix");
@@ -1214,7 +1229,6 @@ export class CodeGenerator {
     }
 
     // cmap key
-    const key = this.generateComponentKey();
     let expr: string;
     if (ast.isDynamic) {
       expr = generateId("Comp");
@@ -1232,7 +1246,7 @@ export class CodeGenerator {
       this.insertAnchor(block);
     }
 
-    let keyArg = `key + \`${key}\``;
+    let keyArg = this.generateComponentKey();
     if (ctx.tKeyExpr) {
       keyArg = `${ctx.tKeyExpr} + ${keyArg}`;
     }
@@ -1311,7 +1325,7 @@ export class CodeGenerator {
     }
     let key = this.target.loopLevel ? `key${this.target.loopLevel}` : "key";
     if (isMultiple) {
-      key = `${key} + \`${this.generateComponentKey()}\``;
+      key = this.generateComponentKey(key);
     }
 
     const props = ast.attrs ? this.formatPropObject(ast.attrs) : [];
@@ -1354,7 +1368,6 @@ export class CodeGenerator {
 
     let { block } = ctx;
     const name = this.compileInNewTarget("slot", ast.content, ctx);
-    const key = this.generateComponentKey();
     let ctxStr = "ctx";
     if (this.target.loopLevel || !this.hasSafeContext) {
       ctxStr = generateId("ctx");
@@ -1368,7 +1381,8 @@ export class CodeGenerator {
     });
 
     const target = compileExpr(ast.target);
-    const blockString = `${id}({target: ${target},slots: {'default': {__render: ${name}.bind(this), __ctx: ${ctxStr}}}}, key + \`${key}\`, node, ctx, Portal)`;
+    const key = this.generateComponentKey();
+    const blockString = `${id}({target: ${target},slots: {'default': {__render: ${name}.bind(this), __ctx: ${ctxStr}}}}, ${key}, node, ctx, Portal)`;
     if (block) {
       this.insertAnchor(block);
     }

src/compiler/inline_expressions.ts

@@ -268,7 +268,7 @@ export function compileExprToArray(expr: string): Token[] {
   const localVars = new Set<string>();
   const tokens = tokenize(expr);
   let i = 0;
-  let stack = []; // to track last opening [ or {
+  let stack = []; // to track last opening (, [ or {
 
   while (i < tokens.length) {
     let token = tokens[i];
@@ -279,10 +279,12 @@ export function compileExprToArray(expr: string): Token[] {
     switch (token.type) {
       case "LEFT_BRACE":
       case "LEFT_BRACKET":
+      case "LEFT_PAREN":
         stack.push(token.type);
         break;
       case "RIGHT_BRACE":
       case "RIGHT_BRACKET":
+      case "RIGHT_PAREN":
         stack.pop();
     }
 

src/compiler/parser.ts

@@ -1,4 +1,5 @@
 import { OwlError } from "../common/owl_error";
+import { parseXML } from "../common/utils";
 
 // -----------------------------------------------------------------------------
 // AST Type definition
@@ -366,9 +367,9 @@ function parseDOMNode(node: Element, ctx: ParsingContext): AST | null {
       const isSelect = tagName === "select";
       const isCheckboxInput = isInput && typeAttr === "checkbox";
       const isRadioInput = isInput && typeAttr === "radio";
-      const hasLazyMod = attr.includes(".lazy");
-      const hasNumberMod = attr.includes(".number");
       const hasTrimMod = attr.includes(".trim");
+      const hasLazyMod = hasTrimMod || attr.includes(".lazy");
+      const hasNumberMod = attr.includes(".number");
       const eventType = isRadioInput ? "click" : isSelect || hasLazyMod ? "change" : "input";
 
       model = {
@@ -740,14 +741,14 @@ function parseComponent(node: Element, ctx: ParsingContext): AST | null {
       // be ignored)
       let el = slotNode.parentElement!;
       let isInSubComponent = false;
-      while (el !== clone) {
+      while (el && el !== clone) {
         if (el!.hasAttribute("t-component") || el!.tagName[0] === el!.tagName[0].toUpperCase()) {
           isInSubComponent = true;
           break;
         }
         el = el.parentElement!;
       }
-      if (isInSubComponent) {
+      if (isInSubComponent || !el) {
         continue;
       }
 
@@ -972,40 +973,3 @@ function normalizeXML(el: Element) {
   normalizeTIf(el);
   normalizeTEscTOut(el);
 }
-
-/**
- * Parses an XML string into an XML document, throwing errors on parser errors
- * instead of returning an XML document containing the parseerror.
- *
- * @param xml the string to parse
- * @returns an XML document corresponding to the content of the string
- */
-function parseXML(xml: string): XMLDocument {
-  const parser = new DOMParser();
-  const doc = parser.parseFromString(xml, "text/xml");
-  if (doc.getElementsByTagName("parsererror").length) {
-    let msg = "Invalid XML in template.";
-    const parsererrorText = doc.getElementsByTagName("parsererror")[0].textContent;
-    if (parsererrorText) {
-      msg += "\nThe parser has produced the following error message:\n" + parsererrorText;
-      const re = /\d+/g;
-      const firstMatch = re.exec(parsererrorText);
-      if (firstMatch) {
-        const lineNumber = Number(firstMatch[0]);
-        const line = xml.split("\n")[lineNumber - 1];
-        const secondMatch = re.exec(parsererrorText);
-        if (line && secondMatch) {
-          const columnIndex = Number(secondMatch[0]) - 1;
-          if (line[columnIndex]) {
-            msg +=
-              `\nThe error might be located at xml line ${lineNumber} column ${columnIndex}\n` +
-              `${line}\n${"-".repeat(columnIndex - 1)}^`;
-          }
-        }
-      }
-    }
-    throw new OwlError(msg);
-  }
-
-  return doc;
-}

src/runtime/app.ts

@@ -16,10 +16,13 @@ export interface Env {
   [key: string]: any;
 }
 
-export interface AppConfig<P, E> extends TemplateSetConfig {
-  name?: string;
+export interface RootConfig<P, E> {
   props?: P;
   env?: E;
+}
+
+export interface AppConfig<P, E> extends TemplateSetConfig, RootConfig<P, E> {
+  name?: string;
   test?: boolean;
   warnIfNoStaticProps?: boolean;
 }
@@ -35,6 +38,8 @@ This is not suitable for production use.
 See https://github.com/odoo/owl/blob/${hash}/doc/reference/app.md#configuration for more information.`;
 };
 
+const apps = new Set<App>();
+
 declare global {
   interface Window {
     __OWL_DEVTOOLS__: {
@@ -47,13 +52,13 @@ declare global {
   }
 }
 
-window.__OWL_DEVTOOLS__ ||= {
-  apps: new Set<App>(),
-  Fiber: Fiber,
-  RootFiber: RootFiber,
-  toRaw: toRaw,
-  reactive: reactive,
-};
+interface Root<P, E> {
+  node: ComponentNode<P, E>;
+  mount(target: HTMLElement | ShadowRoot, options?: MountOptions): Promise<Component<P, E>>;
+  destroy(): void;
+}
+
+window.__OWL_DEVTOOLS__ ||= { apps, Fiber, RootFiber, toRaw, reactive };
 
 export class App<
   T extends abstract new (...args: any) => any = any,
@@ -61,6 +66,7 @@ export class App<
   E = any
 > extends TemplateSet {
   static validateTarget = validateTarget;
+  static apps = apps;
   static version = version;
 
   name: string;
@@ -68,6 +74,7 @@ export class App<
   props: P;
   env: E;
   scheduler = new Scheduler();
+  subRoots: Set<ComponentNode> = new Set();
   root: ComponentNode<P, E> | null = null;
   warnIfNoStaticProps: boolean;
 
@@ -75,7 +82,7 @@ export class App<
     super(config);
     this.name = config.name || "";
     this.Root = Root;
-    window.__OWL_DEVTOOLS__.apps.add(this);
+    apps.add(this);
     if (config.test) {
       this.dev = true;
     }
@@ -94,14 +101,46 @@ export class App<
     target: HTMLElement | ShadowRoot,
     options?: MountOptions
   ): Promise<Component<P, E> & InstanceType<T>> {
-    App.validateTarget(target);
-    if (this.dev) {
-      validateProps(this.Root, this.props, { __owl__: { app: this } });
+    const root = this.createRoot(this.Root, { props: this.props });
+    this.root = root.node;
+    this.subRoots.delete(root.node);
+    return root.mount(target, options) as any;
+  }
+
+  createRoot<Props extends object, SubEnv = any>(
+    Root: ComponentConstructor<Props, E>,
+    config: RootConfig<Props, SubEnv> = {}
+  ): Root<Props, SubEnv> {
+    const props = config.props || ({} as Props);
+    // hack to make sure the sub root get the sub env if necessary. for owl 3,
+    // would be nice to rethink the initialization process to make sure that
+    // we can create a ComponentNode and give it explicitely the env, instead
+    // of looking it up in the app
+    const env = this.env;
+    if (config.env) {
+      this.env = config.env as any;
     }
-    const node = this.makeNode(this.Root, this.props);
-    const prom = this.mountNode(node, target, options);
-    this.root = node;
-    return prom;
+    const node = this.makeNode(Root, props);
+    if (config.env) {
+      this.env = env;
+    }
+    this.subRoots.add(node);
+    return {
+      node,
+      mount: (target: HTMLElement | ShadowRoot, options?: MountOptions) => {
+        App.validateTarget(target);
+        if (this.dev) {
+          validateProps(Root, props, { __owl__: { app: this } });
+        }
+        const prom = this.mountNode(node, target, options);
+        return prom;
+      },
+      destroy: () => {
+        this.subRoots.delete(node);
+        node.destroy();
+        this.scheduler.processTasks();
+      },
+    };
   }
 
   makeNode(Component: ComponentConstructor, props: any): ComponentNode {
@@ -137,10 +176,13 @@ export class App<
 
   destroy() {
     if (this.root) {
+      for (let subroot of this.subRoots) {
+        subroot.destroy();
+      }
       this.root.destroy();
       this.scheduler.processTasks();
     }
-    window.__OWL_DEVTOOLS__.apps.delete(this);
+    apps.delete(this);
   }
 
   createComponent<P extends Props>(

src/runtime/component.ts

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

src/runtime/hooks.ts

@@ -59,7 +59,7 @@ export function useChildSubEnv(envExtension: Env) {
 // useEffect
 // -----------------------------------------------------------------------------
 
-type EffectDeps<T extends any[]> = T | (T extends [...infer H, never] ? EffectDeps<H> : never);
+type EffectDeps<T extends unknown[]> = T | (T extends [...infer H, never] ? EffectDeps<H> : never);
 
 /**
  * @template T
@@ -67,7 +67,7 @@ type EffectDeps<T extends any[]> = T | (T extends [...infer H, never] ? EffectDe
  * @returns {void|(()=>void)} a cleanup function that reverses the side
  *      effects of the effect callback.
  */
-type Effect<T extends [...T]> = (...dependencies: EffectDeps<T>) => void | (() => void);
+type Effect<T extends unknown[]> = (...dependencies: EffectDeps<T>) => void | (() => void);
 
 /**
  * This hook will run a callback when a component is mounted and patched, and
@@ -76,15 +76,15 @@ type Effect<T extends [...T]> = (...dependencies: EffectDeps<T>) => void | (() =
  *
  * @template T
  * @param {Effect<T>} effect the effect to run on component mount and/or patch
- * @param {()=>T} [computeDependencies=()=>[NaN]] a callback to compute
+ * @param {()=>[...T]} [computeDependencies=()=>[NaN]] a callback to compute
  *      dependencies that will decide if the effect needs to be cleaned up and
  *      run again. If the dependencies did not change, the effect will not run
  *      again. The default value returns an array containing only NaN because
  *      NaN !== NaN, which will cause the effect to rerun on every patch.
  */
-export function useEffect<T extends [...T]>(
+export function useEffect<T extends unknown[]>(
   effect: Effect<T>,
-  computeDependencies: () => T = () => [NaN] as never
+  computeDependencies: () => [...T] = () => [NaN] as never
 ) {
   let cleanup: (() => void) | void;
   let dependencies: T;

src/runtime/index.ts

@@ -41,7 +41,7 @@ export { useComponent, useState } from "./component_node";
 export { status } from "./status";
 export { reactive, markRaw, toRaw } from "./reactivity";
 export { useEffect, useEnv, useExternalListener, useRef, useChildSubEnv, useSubEnv } from "./hooks";
-export { EventBus, whenReady, loadFile, markup } from "./utils";
+export { batched, EventBus, whenReady, loadFile, markup } from "./utils";
 export {
   onWillStart,
   onMounted,

src/runtime/lifecycle_hooks.ts

@@ -3,42 +3,50 @@ import { nodeErrorHandlers } from "./error_handling";
 import { OwlError } from "../common/owl_error";
 
 const TIMEOUT = Symbol("timeout");
+const HOOK_TIMEOUT: { [key: string]: number } = {
+  onWillStart: 3000,
+  onWillUpdateProps: 3000,
+};
 function wrapError(fn: (...args: any[]) => any, hookName: string) {
-  const error = new OwlError(`The following error occurred in ${hookName}: `) as Error & {
+  const error = new OwlError() as Error & {
     cause: any;
   };
-  const timeoutError = new OwlError(`${hookName}'s promise hasn't resolved after 3 seconds`);
+  const timeoutError = new OwlError();
   const node = getCurrent();
   return (...args: any[]) => {
     const onError = (cause: any) => {
       error.cause = cause;
-      if (cause instanceof Error) {
-        error.message += `"${cause.message}"`;
-      } else {
-        error.message = `Something that is not an Error was thrown in ${hookName} (see this Error's "cause" property)`;
-      }
+      error.message =
+        cause instanceof Error
+          ? `The following error occurred in ${hookName}: "${cause.message}"`
+          : `Something that is not an Error was thrown in ${hookName} (see this Error's "cause" property)`;
       throw error;
     };
+    let result;
     try {
-      const result = fn(...args);
-      if (result instanceof Promise) {
-        if (hookName === "onWillStart" || hookName === "onWillUpdateProps") {
-          const fiber = node.fiber;
-          Promise.race([
-            result.catch(() => {}),
-            new Promise((resolve) => setTimeout(() => resolve(TIMEOUT), 3000)),
-          ]).then((res) => {
-            if (res === TIMEOUT && node.fiber === fiber) {
-              console.warn(timeoutError);
-            }
-          });
-        }
-        return result.catch(onError);
-      }
-      return result;
+      result = fn(...args);
     } catch (cause) {
       onError(cause);
     }
+    if (!(result instanceof Promise)) {
+      return result;
+    }
+    const timeout = HOOK_TIMEOUT[hookName];
+    if (timeout) {
+      const fiber = node.fiber;
+      Promise.race([
+        result.catch(() => {}),
+        new Promise((resolve) => setTimeout(() => resolve(TIMEOUT), timeout)),
+      ]).then((res) => {
+        if (res === TIMEOUT && node.fiber === fiber && node.status <= 2) {
+          timeoutError.message = `${hookName}'s promise hasn't resolved after ${
+            timeout / 1000
+          } seconds`;
+          console.log(timeoutError);
+        }
+      });
+    }
+    return result.catch(onError);
   };
 }
 

src/runtime/portal.ts

@@ -65,7 +65,7 @@ export class Portal extends Component {
       type: String,
     },
     slots: true,
-  };
+  } as const;
 
   setup() {
     const node: any = this.__owl__;

src/runtime/reactivity.ts

@@ -20,8 +20,9 @@ type CollectionRawType = "Set" | "Map" | "WeakMap";
 const objectToString = Object.prototype.toString;
 const objectHasOwnProperty = Object.prototype.hasOwnProperty;
 
-const SUPPORTED_RAW_TYPES = new Set(["Object", "Array", "Set", "Map", "WeakMap"]);
-const COLLECTION_RAWTYPES = new Set(["Set", "Map", "WeakMap"]);
+// Use arrays because Array.includes is faster than Set.has for small arrays
+const SUPPORTED_RAW_TYPES = ["Object", "Array", "Set", "Map", "WeakMap"];
+const COLLECTION_RAW_TYPES = ["Set", "Map", "WeakMap"];
 
 /**
  * extract "RawType" from strings like "[object RawType]" => this lets us ignore
@@ -45,7 +46,7 @@ function canBeMadeReactive(value: any): boolean {
   if (typeof value !== "object") {
     return false;
   }
-  return SUPPORTED_RAW_TYPES.has(rawType(value));
+  return SUPPORTED_RAW_TYPES.includes(rawType(value));
 }
 /**
  * Creates a reactive from the given object/callback if possible and returns it,
@@ -220,7 +221,7 @@ export function reactive<T extends Target>(target: T, callback: Callback = NO_CA
   const reactivesForTarget = reactiveCache.get(target)!;
   if (!reactivesForTarget.has(callback)) {
     const targetRawType = rawType(target);
-    const handler = COLLECTION_RAWTYPES.has(targetRawType)
+    const handler = COLLECTION_RAW_TYPES.includes(targetRawType)
       ? collectionsProxyHandler(target as Collection, callback, targetRawType as CollectionRawType)
       : basicProxyHandler<T>(callback);
     const proxy = new Proxy(target, handler as ProxyHandler<T>) as Reactive<T>;
@@ -249,7 +250,7 @@ function basicProxyHandler<T extends Target>(callback: Callback): ProxyHandler<T
     set(target, key, value, receiver) {
       const hadKey = objectHasOwnProperty.call(target, key);
       const originalValue = Reflect.get(target, key, receiver);
-      const ret = Reflect.set(target, key, value, receiver);
+      const ret = Reflect.set(target, key, toRaw(value), receiver);
       if (!hadKey && objectHasOwnProperty.call(target, key)) {
         notifyReactives(target, KEYCHANGES);
       }
@@ -368,7 +369,7 @@ function delegateAndNotify(
     if (hadKey !== hasKey) {
       notifyReactives(target, KEYCHANGES);
     }
-    if (originalValue !== value) {
+    if (originalValue !== target[getterName](key)) {
       notifyReactives(target, key);
     }
     return ret;

src/runtime/template_helpers.ts

@@ -70,14 +70,12 @@ function prepareList(collection: unknown): [unknown[], unknown[], number, undefi
   } else if (collection instanceof Map) {
     keys = [...collection.keys()];
     values = [...collection.values()];
+  } else if (Symbol.iterator in Object(collection)) {
+    keys = [...(<Iterable<unknown>>collection)];
+    values = keys;
   } else if (collection && typeof collection === "object") {
-    if (Symbol.iterator in collection) {
-      keys = [...(<Iterable<unknown>>collection)];
-      values = keys;
-    } else {
-      values = Object.values(collection);
-      keys = Object.keys(collection);
-    }
+    values = Object.values(collection);
+    keys = Object.keys(collection);
   } else {
     throw new OwlError(`Invalid loop expression: "${collection}" is not iterable`);
   }

src/runtime/template_set.ts

@@ -4,44 +4,16 @@ import { getCurrent } from "./component_node";
 import { Portal, portalTemplate } from "./portal";
 import { helpers } from "./template_helpers";
 import { OwlError } from "../common/owl_error";
+import { parseXML } from "../common/utils";
 
 const bdom = { text, createBlock, list, multi, html, toggler, comment };
 
-function parseXML(xml: string): Document {
-  const parser = new DOMParser();
-
-  const doc = parser.parseFromString(xml, "text/xml");
-  if (doc.getElementsByTagName("parsererror").length) {
-    let msg = "Invalid XML in template.";
-    const parsererrorText = doc.getElementsByTagName("parsererror")[0].textContent;
-    if (parsererrorText) {
-      msg += "\nThe parser has produced the following error message:\n" + parsererrorText;
-      const re = /\d+/g;
-      const firstMatch = re.exec(parsererrorText);
-      if (firstMatch) {
-        const lineNumber = Number(firstMatch[0]);
-        const line = xml.split("\n")[lineNumber - 1];
-        const secondMatch = re.exec(parsererrorText);
-        if (line && secondMatch) {
-          const columnIndex = Number(secondMatch[0]) - 1;
-          if (line[columnIndex]) {
-            msg +=
-              `\nThe error might be located at xml line ${lineNumber} column ${columnIndex}\n` +
-              `${line}\n${"-".repeat(columnIndex - 1)}^`;
-          }
-        }
-      }
-    }
-    throw new OwlError(msg);
-  }
-  return doc;
-}
-
 export interface TemplateSetConfig {
   dev?: boolean;
   translatableAttributes?: string[];
   translateFn?: (s: string) => string;
-  templates?: string | Document;
+  templates?: string | Document | Record<string, string>;
+  getTemplate?: (s: string) => Element | Function | string | void;
 }
 
 export class TemplateSet {
@@ -51,6 +23,7 @@ export class TemplateSet {
   dev: boolean;
   rawTemplates: typeof globalTemplates = Object.create(globalTemplates);
   templates: { [name: string]: Template } = {};
+  getRawTemplate?: (s: string) => Element | Function | string | void;
   translateFn?: (s: string) => string;
   translatableAttributes?: string[];
   Portal = Portal;
@@ -60,12 +33,23 @@ export class TemplateSet {
     this.translateFn = config.translateFn;
     this.translatableAttributes = config.translatableAttributes;
     if (config.templates) {
-      this.addTemplates(config.templates);
+      if (config.templates instanceof Document || typeof config.templates === "string") {
+        this.addTemplates(config.templates);
+      } else {
+        for (const name in config.templates) {
+          this.addTemplate(name, config.templates[name]);
+        }
+      }
     }
+    this.getRawTemplate = config.getTemplate;
   }
 
   addTemplate(name: string, template: string | Element) {
     if (name in this.rawTemplates) {
+      // this check can be expensive, just silently ignore double definitions outside dev mode
+      if (!this.dev) {
+        return;
+      }
       const rawTemplate = this.rawTemplates[name];
       const currentAsString =
         typeof rawTemplate === "string"
@@ -96,7 +80,7 @@ export class TemplateSet {
 
   getTemplate(name: string): Template {
     if (!(name in this.templates)) {
-      const rawTemplate = this.rawTemplates[name];
+      const rawTemplate = this.getRawTemplate?.(name) || this.rawTemplates[name];
       if (rawTemplate === undefined) {
         let extraInfo = "";
         try {

src/runtime/validation.ts

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

src/version.ts

@@ -1,2 +1,2 @@
 // do not modify manually. This file is generated by the release script.
-export const version = "2.2.5";
+export const version = "2.4.0";

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

@@ -32,7 +32,7 @@ exports[`app app: clear scheduler tasks and destroy cancelled nodes immediately
 }"
 `;
 
-exports[`app app: clear scheduler tasks and destroy cancelled nodes immediately on destroy 2`] = `
+exports[`app app: clear scheduler tasks and destroy cancelled nodes immediately on destroy 3`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -57,6 +57,19 @@ exports[`app can configure an app with props 1`] = `
 }"
 `;
 
+exports[`app can load templates from an object name-string 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  let block1 = createBlock(\`<div class=\\"hello\\">hello</div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;
+
 exports[`app can mount app in an iframe 1`] = `
 "function anonymous(app, bdom, helpers
 ) {

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

@@ -0,0 +1,131 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`subroot by default, env is the same in sub root 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  let block1 = createBlock(\`<div>main app</div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;
+
+exports[`subroot by default, env is the same in sub root 2`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  let block1 = createBlock(\`<div>sub root</div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;
+
+exports[`subroot can mount subroot 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  let block1 = createBlock(\`<div>main app</div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;
+
+exports[`subroot can mount subroot 2`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  let block1 = createBlock(\`<div>sub root</div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;
+
+exports[`subroot can mount subroot inside own dom 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  let block1 = createBlock(\`<div>main app</div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;
+
+exports[`subroot can mount subroot inside own dom 2`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  let block1 = createBlock(\`<div>sub root</div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;
+
+exports[`subroot env can be specified for sub roots 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  let block1 = createBlock(\`<div>main app</div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;
+
+exports[`subroot env can be specified for sub roots 2`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  let block1 = createBlock(\`<div>sub root</div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;
+
+exports[`subroot subcomponents can be destroyed, and it properly cleanup the subroots 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  let block1 = createBlock(\`<div>main app</div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;
+
+exports[`subroot subcomponents can be destroyed, and it properly cleanup the subroots 2`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  let block1 = createBlock(\`<div>sub root</div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;

tests/app/app.test.ts

@@ -8,6 +8,7 @@ import {
   useLogLifecycle,
   makeDeferred,
   nextMicroTick,
+  steps,
 } from "../helpers";
 
 let fixture: HTMLElement;
@@ -123,23 +124,64 @@ describe("app", () => {
 
     const app = new App(A);
     const comp = await app.mount(fixture);
-    expect(["A:setup", "A:willStart", "A:willRender", "A:rendered", "A:mounted"]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "A:setup",
+        "A:willStart",
+        "A:willRender",
+        "A:rendered",
+        "A:mounted",
+      ]
+    `);
 
     comp.state.value = true;
     await nextTick();
-    expect(["A:willRender", "B:setup", "B:willStart", "A:rendered"]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "A:willRender",
+        "B:setup",
+        "B:willStart",
+        "A:rendered",
+      ]
+    `);
 
     // rerender to force the instantiation of a new B component (and cancelling the first)
     comp.render();
     await nextMicroTick();
-    expect(["A:willRender", "B:setup", "B:willStart", "A:rendered"]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "A:willRender",
+        "B:setup",
+        "B:willStart",
+        "A:rendered",
+      ]
+    `);
 
     app.destroy();
-    expect([
-      "A:willUnmount",
-      "B:willDestroy",
-      "A:willDestroy",
-      "B:willDestroy", // make sure the 2 B instances have been destroyed synchronously
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "A:willUnmount",
+        "B:willDestroy",
+        "A:willDestroy",
+        "B:willDestroy",
+      ]
+    `);
+  });
+
+  test("can load templates from an object name-string", async () => {
+    const templates = {
+      hello: `<div class="hello">hello</div>`,
+      world: `<div>world</div>`,
+    };
+    class SomeComponent extends Component {
+      static template = "hello";
+    }
+
+    const app = new App(SomeComponent, { templates });
+    await app.mount(fixture);
+    expect(fixture.querySelector(".hello")).toBeDefined();
+    // Only the "hello" template is used, so the "world" template is not yet loaded
+    expect(Object.keys(app.templates)).toEqual(["hello"]);
+    expect(Object.keys(app.rawTemplates)).toEqual(["hello", "world"]);
   });
 });

tests/app/sub_root.test.ts

@@ -0,0 +1,115 @@
+import { App, Component, xml } from "../../src";
+import { status } from "../../src/runtime/status";
+import { makeTestFixture, snapshotEverything } from "../helpers";
+
+let fixture: HTMLElement;
+
+snapshotEverything();
+
+beforeEach(() => {
+  fixture = makeTestFixture();
+});
+
+class SomeComponent extends Component {
+  static template = xml`<div>main app</div>`;
+}
+
+class SubComponent extends Component {
+  static template = xml`<div>sub root</div>`;
+}
+
+describe("subroot", () => {
+  test("can mount subroot", async () => {
+    const app = new App(SomeComponent);
+    const comp = await app.mount(fixture);
+    expect(fixture.innerHTML).toBe("<div>main app</div>");
+    const subRoot = app.createRoot(SubComponent);
+    const subcomp = await subRoot.mount(fixture);
+    expect(fixture.innerHTML).toBe("<div>main app</div><div>sub root</div>");
+
+    app.destroy();
+    expect(fixture.innerHTML).toBe("");
+    expect(status(comp)).toBe("destroyed");
+    expect(status(subcomp)).toBe("destroyed");
+  });
+
+  test("can mount subroot inside own dom", async () => {
+    const app = new App(SomeComponent);
+    const comp = await app.mount(fixture);
+    expect(fixture.innerHTML).toBe("<div>main app</div>");
+    const subRoot = app.createRoot(SubComponent);
+    const subcomp = await subRoot.mount(fixture.querySelector("div")!);
+    expect(fixture.innerHTML).toBe("<div>main app<div>sub root</div></div>");
+
+    app.destroy();
+    expect(fixture.innerHTML).toBe("");
+    expect(status(comp)).toBe("destroyed");
+    expect(status(subcomp)).toBe("destroyed");
+  });
+
+  test("by default, env is the same in sub root", async () => {
+    let env, subenv;
+    class SC extends SomeComponent {
+      setup() {
+        env = this.env;
+      }
+    }
+    class Sub extends SubComponent {
+      setup() {
+        subenv = this.env;
+      }
+    }
+
+    const app = new App(SC);
+    await app.mount(fixture);
+    const subRoot = app.createRoot(Sub);
+    await subRoot.mount(fixture);
+
+    expect(env).toBeDefined();
+    expect(subenv).toBeDefined();
+    expect(env).toBe(subenv);
+  });
+
+  test("env can be specified for sub roots", async () => {
+    const env1 = { env1: true };
+    const env2 = {};
+    let someComponentEnv: any, subComponentEnv: any;
+    class SC extends SomeComponent {
+      setup() {
+        someComponentEnv = this.env;
+      }
+    }
+    class Sub extends SubComponent {
+      setup() {
+        subComponentEnv = this.env;
+      }
+    }
+
+    const app = new App(SC, { env: env1 });
+    await app.mount(fixture);
+    const subRoot = app.createRoot(Sub, { env: env2 });
+    await subRoot.mount(fixture);
+
+    // because env is different in app => it is given a sub object, frozen and all
+    // not sure it is a good idea, but it's the way owl 2 works. maybe we should
+    // avoid doing anything with the main env and let user code do it if they
+    // want. in that case, we can change the test here to assert that they are equal
+    expect(someComponentEnv).not.toBe(env1);
+    expect(someComponentEnv!.env1).toBe(true);
+    expect(subComponentEnv).toBe(env2);
+  });
+
+  test("subcomponents can be destroyed, and it properly cleanup the subroots", async () => {
+    const app = new App(SomeComponent);
+    const comp = await app.mount(fixture);
+    expect(fixture.innerHTML).toBe("<div>main app</div>");
+    const root = app.createRoot(SubComponent);
+    const subcomp = await root.mount(fixture.querySelector("div")!);
+    expect(fixture.innerHTML).toBe("<div>main app<div>sub root</div></div>");
+
+    root.destroy();
+    expect(fixture.innerHTML).toBe("<div>main app</div>");
+    expect(status(comp)).not.toBe("destroyed");
+    expect(status(subcomp)).toBe("destroyed");
+  });
+});

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

@@ -1,5 +1,38 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`comments comment node with backslash at top level 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  return function template(ctx, node, key = \\"\\") {
+    return comment(\` \\\\\\\\ \`);
+  }
+}"
+`;
+
+exports[`comments comment node with backtick at top-level 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  return function template(ctx, node, key = \\"\\") {
+    return comment(\` \\\\\` \`);
+  }
+}"
+`;
+
+exports[`comments comment node with interpolation sigil at top level 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  return function template(ctx, node, key = \\"\\") {
+    return comment(\` \\\\\${very cool} \`);
+  }
+}"
+`;
+
 exports[`comments only a comment 1`] = `
 "function anonymous(app, bdom, helpers
 ) {

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

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

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

@@ -1,5 +1,41 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`t-esc default with backslash at top level 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  let { withDefault } = helpers;
+  
+  return function template(ctx, node, key = \\"\\") {
+    return text(withDefault(undefined, \`\\\\\\\\\`));
+  }
+}"
+`;
+
+exports[`t-esc default with backtick at top-level 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  let { withDefault } = helpers;
+  
+  return function template(ctx, node, key = \\"\\") {
+    return text(withDefault(undefined, \`\\\\\`\`));
+  }
+}"
+`;
+
+exports[`t-esc default with interpolation sigil at top level 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  let { withDefault } = helpers;
+  
+  return function template(ctx, node, key = \\"\\") {
+    return text(withDefault(undefined, \`\\\\\${very cool}\`));
+  }
+}"
+`;
+
 exports[`t-esc div with falsy values 1`] = `
 "function anonymous(app, bdom, helpers
 ) {

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

@@ -256,6 +256,34 @@ exports[`t-foreach iterate, position 1`] = `
 }"
 `;
 
+exports[`t-foreach iterate, string param 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  let { prepareList, withKey } = helpers;
+  
+  return function template(ctx, node, key = \\"\\") {
+    ctx = Object.create(ctx);
+    const [k_block1, v_block1, l_block1, c_block1] = prepareList('abc');;
+    for (let i1 = 0; i1 < l_block1; i1++) {
+      ctx[\`item\`] = k_block1[i1];
+      ctx[\`item_index\`] = i1;
+      ctx[\`item_value\`] = v_block1[i1];
+      const key1 = ctx['item_index'];
+      const b3 = text(\` [\`);
+      const b4 = text(ctx['item_index']);
+      const b5 = text(\`: \`);
+      const b6 = text(ctx['item']);
+      const b7 = text(\` \`);
+      const b8 = text(ctx['item_value']);
+      const b9 = text(\`] \`);
+      c_block1[i1] = withKey(multi([b3, b4, b5, b6, b7, b8, b9]), key1);
+    }
+    return list(c_block1);
+  }
+}"
+`;
+
 exports[`t-foreach simple iteration (in a node) 1`] = `
 "function anonymous(app, bdom, helpers
 ) {

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

@@ -1,5 +1,50 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`t-set body with backslash at top level 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  let { isBoundary, withDefault, setContextValue } = helpers;
+  
+  return function template(ctx, node, key = \\"\\") {
+    ctx = Object.create(ctx);
+    ctx[isBoundary] = 1
+    setContextValue(ctx, \\"value\\", \`\\\\\\\\\`);
+    return text(ctx['value']);
+  }
+}"
+`;
+
+exports[`t-set body with backtick at top-level 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  let { isBoundary, withDefault, setContextValue } = helpers;
+  
+  return function template(ctx, node, key = \\"\\") {
+    ctx = Object.create(ctx);
+    ctx[isBoundary] = 1
+    setContextValue(ctx, \\"value\\", \`\\\\\`\`);
+    return text(ctx['value']);
+  }
+}"
+`;
+
+exports[`t-set body with interpolation sigil at top level 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  let { isBoundary, withDefault, setContextValue } = helpers;
+  
+  return function template(ctx, node, key = \\"\\") {
+    ctx = Object.create(ctx);
+    ctx[isBoundary] = 1
+    setContextValue(ctx, \\"value\\", \`\\\\\${very cool}\`);
+    return text(ctx['value']);
+  }
+}"
+`;
+
 exports[`t-set evaluate value expression 1`] = `
 "function anonymous(app, bdom, helpers
 ) {

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

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

tests/compiler/comments.test.ts

@@ -26,4 +26,19 @@ describe("comments", () => {
         </div>`;
     expect(renderToString(template)).toBe("<div><span>true</span></div>");
   });
+
+  test("comment node with backslash at top level", () => {
+    const template = "<!-- \\ -->";
+    expect(renderToString(template)).toBe("<!-- \\ -->");
+  });
+
+  test("comment node with backtick at top-level", () => {
+    const template = "<!-- ` -->";
+    expect(renderToString(template)).toBe("<!-- ` -->");
+  });
+
+  test("comment node with interpolation sigil at top level", () => {
+    const template = "<!-- ${very cool} -->";
+    expect(renderToString(template)).toBe("<!-- ${very cool} -->");
+  });
 });

tests/compiler/inline_expressions.test.ts

@@ -174,6 +174,9 @@ describe("expression evaluation", () => {
     expect(compileExpr("list.data.map((data) => data)")).toBe(
       "ctx['list'].data.map((_data)=>_data)"
     );
+    expect(compileExpr("(ev) => { myFunc(v1, v2, ev.target.value); }")).toBe(
+      "(_ev)=>{ctx['myFunc'](ctx['v1'],ctx['v2'],_ev.target.value);}"
+    );
   });
   test.skip("arrow functions: not yet supported", () => {
     // e is added to localvars in inline_expression but not removed after the arrow func body

tests/compiler/simple_templates.test.ts

@@ -154,4 +154,19 @@ describe("simple templates, mostly static", () => {
       </div>`;
     expect(renderToString(template, { a: "a", b: "b", c: "c" })).toBe("<div>abLoadingc</div>");
   });
+
+  test("text node with backslash at top level", () => {
+    const template = "\\";
+    expect(renderToString(template)).toBe("\\");
+  });
+
+  test("text node with backtick at top-level", () => {
+    const template = "`";
+    expect(renderToString(template)).toBe("`");
+  });
+
+  test("text node with interpolation sigil at top level", () => {
+    const template = "${very cool}";
+    expect(renderToString(template)).toBe("${very cool}");
+  });
 });

tests/compiler/t_esc.test.ts

@@ -121,4 +121,19 @@ describe("t-esc", () => {
     mount(bdom, fixture);
     expect(fixture.querySelector("span")!.textContent).toBe("<p>escaped</p>");
   });
+
+  test("default with backslash at top level", () => {
+    const template = '<t t-esc="undefined">\\</t>';
+    expect(renderToString(template)).toBe("\\");
+  });
+
+  test("default with backtick at top-level", () => {
+    const template = '<t t-esc="undefined">`</t>';
+    expect(renderToString(template)).toBe("`");
+  });
+
+  test("default with interpolation sigil at top level", () => {
+    const template = '<t t-esc="undefined">${very cool}</t>';
+    expect(renderToString(template)).toBe("${very cool}");
+  });
 });

tests/compiler/t_foreach.test.ts

@@ -131,6 +131,15 @@ describe("t-foreach", () => {
     expect(renderToString(template, context)).toBe(expected);
   });
 
+  test("iterate, string param", () => {
+    const template = `
+      <t t-foreach="'abc'" t-as="item" t-key="item_index">
+        [<t t-esc="item_index"/>: <t t-esc="item"/> <t t-esc="item_value"/>]
+      </t>`;
+    const expected = ` [0: a a]  [1: b b]  [2: c c] `;
+    expect(renderToString(template)).toBe(expected);
+  });
+
   test("iterate, iterable param", () => {
     const template = `
       <t t-foreach="map.values()" t-as="item" t-key="item_index">

tests/compiler/t_set.test.ts

@@ -54,6 +54,21 @@ describe("t-set", () => {
     expect(renderToString(template)).toBe("ok");
   });
 
+  test("body with backslash at top level", () => {
+    const template = '<t t-set="value">\\</t><t t-esc="value"/>';
+    expect(renderToString(template)).toBe("\\");
+  });
+
+  test("body with backtick at top-level", () => {
+    const template = '<t t-set="value">`</t><t t-esc="value"/>';
+    expect(renderToString(template)).toBe("`");
+  });
+
+  test("body with interpolation sigil at top level", () => {
+    const template = '<t t-set="value">${very cool}</t><t t-esc="value"/>';
+    expect(renderToString(template)).toBe("${very cool}");
+  });
+
   test("set from body literal (with t-if/t-else", () => {
     const template = `
       <t>

tests/compiler/template_set.test.ts

@@ -78,4 +78,62 @@ describe("loading templates", () => {
     context.addTemplates(xml);
     expect(Object.keys(context.rawTemplates)).toEqual([]);
   });
+
+  test("getTemplate: element returned", () => {
+    const context = new TestContext({
+      getTemplate: (name) => {
+        if (name === "main") {
+          const data = `<div>Hello World!</div>`;
+          const xml = new DOMParser().parseFromString(data, "text/xml");
+          return xml.firstChild as Element;
+        }
+        return;
+      },
+    });
+    const result = context.renderToString("main");
+    expect(result).toBe("<div>Hello World!</div>");
+  });
+
+  test("getTemplate: element returned (2)", () => {
+    const context = new TestContext({
+      getTemplate: (name) => {
+        if (name === "main") {
+          const doc = new Document();
+          const div = doc.createElement("div");
+          div.append(doc.createTextNode("Hello World!"));
+          return div;
+        }
+        return;
+      },
+    });
+    const result = context.renderToString("main");
+    expect(result).toBe("<div>Hello World!</div>");
+  });
+
+  test("getTemplate: template string returned", () => {
+    const context = new TestContext({
+      getTemplate: (name) => {
+        if (name === "main") {
+          return `<div>Hello World!</div>`;
+        }
+        return;
+      },
+    });
+    const result = context.renderToString("main");
+    expect(result).toBe("<div>Hello World!</div>");
+  });
+
+  test("getTemplate: undefined returned", () => {
+    const context = new TestContext({
+      getTemplate: () => {},
+    });
+    const data = `<?xml version="1.0" encoding="UTF-8"?>
+    <templates id="template" xml:space="preserve">
+      <div t-name="main">Hello World!</div>
+    </templates>`;
+    const xml = new DOMParser().parseFromString(data, "text/xml");
+    context.addTemplates(xml);
+    const result = context.renderToString("main");
+    expect(result).toBe("<div>Hello World!</div>");
+  });
 });

tests/compiler/validation.test.ts

@@ -11,8 +11,8 @@ describe("basic validation", () => {
     expect(() => context.getTemplate("invalidname")).toThrow("Missing template");
   });
 
-  test("cannot add a different template with the same name", () => {
-    const context = new TemplateSet();
+  test("cannot add a different template with the same name in dev mode", () => {
+    const context = new TemplateSet({ dev: true });
     context.addTemplate("test", `<t/>`);
     // Same template with the same name is fine
     expect(() => context.addTemplate("test", "<t/>")).not.toThrow();
@@ -20,6 +20,13 @@ describe("basic validation", () => {
     expect(() => context.addTemplate("test", "<div/>")).toThrow("already defined");
   });
 
+  test("adding different template with same name outside dev mode silently ignores it", () => {
+    const context = new TemplateSet({ dev: false });
+    context.addTemplate("test", `<t/>`);
+    expect(() => context.addTemplate("test", "<div/>")).not.toThrow();
+    expect(context.rawTemplates.test).toBe("<t/>");
+  });
+
   test("invalid xml", () => {
     const template = "<div>";
     expect(() => snapshotTemplate(template)).toThrow("Invalid XML in template");

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

@@ -97,6 +97,19 @@ exports[`basics a component cannot be mounted in a detached node (even if node i
 }"
 `;
 
+exports[`basics a component cannot be mounted in a detached node 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  let block1 = createBlock(\`<div/>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;
+
 exports[`basics a component inside a component 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
@@ -261,6 +274,19 @@ exports[`basics can mount a simple component with props 1`] = `
 }"
 `;
 
+exports[`basics cannot mount on a documentFragment 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  let block1 = createBlock(\`<div>content</div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;
+
 exports[`basics child can be updated 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
@@ -1002,6 +1028,19 @@ exports[`basics three level of components with collapsing root nodes 3`] = `
 }"
 `;
 
+exports[`basics throws if mounting on target=null 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  let block1 = createBlock(\`<span>simple vnode</span>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;
+
 exports[`basics two child components 1`] = `
 "function anonymous(app, bdom, helpers
 ) {

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

@@ -184,7 +184,7 @@ exports[`changing state before first render does not trigger a render (with pare
 }"
 `;
 
-exports[`changing state before first render does not trigger a render (with parent) 2`] = `
+exports[`changing state before first render does not trigger a render (with parent) 3`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -254,7 +254,7 @@ exports[`components are not destroyed between animation frame 1`] = `
 }"
 `;
 
-exports[`components are not destroyed between animation frame 2`] = `
+exports[`components are not destroyed between animation frame 3`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -268,7 +268,7 @@ exports[`components are not destroyed between animation frame 2`] = `
 }"
 `;
 
-exports[`components are not destroyed between animation frame 3`] = `
+exports[`components are not destroyed between animation frame 5`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -748,7 +748,7 @@ exports[`concurrent renderings scenario 10 2`] = `
 }"
 `;
 
-exports[`concurrent renderings scenario 10 3`] = `
+exports[`concurrent renderings scenario 10 4`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -993,7 +993,7 @@ exports[`concurrent renderings scenario 16 3`] = `
 }"
 `;
 
-exports[`concurrent renderings scenario 16 4`] = `
+exports[`concurrent renderings scenario 16 6`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -1024,7 +1024,7 @@ exports[`creating two async components, scenario 1 1`] = `
 }"
 `;
 
-exports[`creating two async components, scenario 1 2`] = `
+exports[`creating two async components, scenario 1 3`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -1038,7 +1038,7 @@ exports[`creating two async components, scenario 1 2`] = `
 }"
 `;
 
-exports[`creating two async components, scenario 1 3`] = `
+exports[`creating two async components, scenario 1 5`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -1085,7 +1085,7 @@ exports[`creating two async components, scenario 2 2`] = `
 }"
 `;
 
-exports[`creating two async components, scenario 2 3`] = `
+exports[`creating two async components, scenario 2 5`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -1133,7 +1133,7 @@ exports[`creating two async components, scenario 3 (patching in the same frame)
 }"
 `;
 
-exports[`creating two async components, scenario 3 (patching in the same frame) 3`] = `
+exports[`creating two async components, scenario 3 (patching in the same frame) 5`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -1308,7 +1308,7 @@ exports[`delayed render does not go through when t-component value changed 2`] =
 }"
 `;
 
-exports[`delayed render does not go through when t-component value changed 3`] = `
+exports[`delayed render does not go through when t-component value changed 4`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -1617,7 +1617,7 @@ exports[`destroyed component causes other soon to be destroyed component to rere
 }"
 `;
 
-exports[`destroyed component causes other soon to be destroyed component to rerender, weird stuff happens 2`] = `
+exports[`destroyed component causes other soon to be destroyed component to rerender, weird stuff happens 3`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -1628,7 +1628,7 @@ exports[`destroyed component causes other soon to be destroyed component to rere
 }"
 `;
 
-exports[`destroyed component causes other soon to be destroyed component to rerender, weird stuff happens 3`] = `
+exports[`destroyed component causes other soon to be destroyed component to rerender, weird stuff happens 4`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -1656,7 +1656,7 @@ exports[`destroying/recreating a subcomponent, other scenario 1`] = `
 }"
 `;
 
-exports[`destroying/recreating a subcomponent, other scenario 2`] = `
+exports[`destroying/recreating a subcomponent, other scenario 3`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -1685,7 +1685,7 @@ exports[`destroying/recreating a subwidget with different props (if start is not
 }"
 `;
 
-exports[`destroying/recreating a subwidget with different props (if start is not over) 2`] = `
+exports[`destroying/recreating a subwidget with different props (if start is not over) 3`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -1787,7 +1787,7 @@ exports[`rendering component again in next microtick 1`] = `
 }"
 `;
 
-exports[`rendering component again in next microtick 2`] = `
+exports[`rendering component again in next microtick 3`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;

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

@@ -241,7 +241,7 @@ exports[`can catch errors an error in onWillDestroy, variation 1`] = `
 }"
 `;
 
-exports[`can catch errors an error in onWillDestroy, variation 2`] = `
+exports[`can catch errors an error in onWillDestroy, variation 3`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;

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

@@ -92,7 +92,7 @@ exports[`lifecycle hooks component semantics 5`] = `
 }"
 `;
 
-exports[`lifecycle hooks component semantics 6`] = `
+exports[`lifecycle hooks component semantics 7`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -185,7 +185,7 @@ exports[`lifecycle hooks destroy new children before being mountged 1`] = `
 }"
 `;
 
-exports[`lifecycle hooks destroy new children before being mountged 2`] = `
+exports[`lifecycle hooks destroy new children before being mountged 3`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -291,7 +291,7 @@ exports[`lifecycle hooks lifecycle semantics, part 2 1`] = `
 }"
 `;
 
-exports[`lifecycle hooks lifecycle semantics, part 2 2`] = `
+exports[`lifecycle hooks lifecycle semantics, part 2 3`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -303,7 +303,7 @@ exports[`lifecycle hooks lifecycle semantics, part 2 2`] = `
 }"
 `;
 
-exports[`lifecycle hooks lifecycle semantics, part 2 3`] = `
+exports[`lifecycle hooks lifecycle semantics, part 2 4`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -348,7 +348,7 @@ exports[`lifecycle hooks lifecycle semantics, part 4 1`] = `
 }"
 `;
 
-exports[`lifecycle hooks lifecycle semantics, part 4 2`] = `
+exports[`lifecycle hooks lifecycle semantics, part 4 3`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -360,7 +360,7 @@ exports[`lifecycle hooks lifecycle semantics, part 4 2`] = `
 }"
 `;
 
-exports[`lifecycle hooks lifecycle semantics, part 4 3`] = `
+exports[`lifecycle hooks lifecycle semantics, part 4 4`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -683,7 +683,7 @@ exports[`lifecycle hooks sub widget (inside sub node): hooks are correctly calle
 }"
 `;
 
-exports[`lifecycle hooks timeout in onWillStart emits a warning 1`] = `
+exports[`lifecycle hooks timeout in onWillStart doesn't emit a console log if app is destroyed 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -696,7 +696,20 @@ exports[`lifecycle hooks timeout in onWillStart emits a warning 1`] = `
 }"
 `;
 
-exports[`lifecycle hooks timeout in onWillUpdateProps emits a warning 1`] = `
+exports[`lifecycle hooks timeout in onWillStart emits a console log 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  let block1 = createBlock(\`<span/>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return block1();
+  }
+}"
+`;
+
+exports[`lifecycle hooks timeout in onWillUpdateProps emits a console log 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
@@ -710,7 +723,7 @@ exports[`lifecycle hooks timeout in onWillUpdateProps emits a warning 1`] = `
 }"
 `;
 
-exports[`lifecycle hooks timeout in onWillUpdateProps emits a warning 2`] = `
+exports[`lifecycle hooks timeout in onWillUpdateProps emits a console log 2`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;

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

@@ -66,6 +66,29 @@ exports[`.alike suffix in a simple case 2`] = `
 }"
 `;
 
+exports[`.translate props are translated 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  const comp1 = app.createComponent(\`Child\`, true, false, false, []);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return comp1({message: \`translated message\`}, key + \`__1\`, node, this, null);
+  }
+}"
+`;
+
+exports[`.translate props are translated 2`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  return function template(ctx, node, key = \\"\\") {
+    return text(ctx['props'].message);
+  }
+}"
+`;
+
 exports[`basics accept ES6-like syntax for props (with getters) 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
@@ -412,6 +435,29 @@ exports[`can bind function prop with bind suffix 2`] = `
 }"
 `;
 
+exports[`can use .translate suffix 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  const comp1 = app.createComponent(\`Child\`, true, false, false, []);
+  
+  return function template(ctx, node, key = \\"\\") {
+    return comp1({message: \`some message\`}, key + \`__1\`, node, this, null);
+  }
+}"
+`;
+
+exports[`can use .translate suffix 2`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  return function template(ctx, node, key = \\"\\") {
+    return text(ctx['props'].message);
+  }
+}"
+`;
+
 exports[`do not crash when binding anonymous function prop with bind suffix 1`] = `
 "function anonymous(app, bdom, helpers
 ) {

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

@@ -167,6 +167,45 @@ exports[`props validation can specify that additional props are allowed (object)
 }"
 `;
 
+exports[`props validation can use custom class as type 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  const comp1 = app.createComponent(\`Child\`, true, false, false, [\\"customObj\\"]);
+  
+  return function template(ctx, node, key = \\"\\") {
+    const props1 = {customObj: ctx['customObj']};
+    helpers.validateProps(\`Child\`, props1, this);
+    return comp1(props1, key + \`__1\`, node, this, null);
+  }
+}"
+`;
+
+exports[`props validation can use custom class as type 2`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  return function template(ctx, node, key = \\"\\") {
+    return text(ctx['props'].customObj.val);
+  }
+}"
+`;
+
+exports[`props validation can use custom class as type: validation failure 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  const comp1 = app.createComponent(\`Child\`, true, false, false, [\\"customObj\\"]);
+  
+  return function template(ctx, node, key = \\"\\") {
+    const props1 = {customObj: ctx['customObj']};
+    helpers.validateProps(\`Child\`, props1, this);
+    return comp1(props1, key + \`__1\`, node, this, null);
+  }
+}"
+`;
+
 exports[`props validation can validate a prop with multiple types 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
@@ -885,6 +924,20 @@ exports[`props validation props: list of strings 1`] = `
 }"
 `;
 
+exports[`props validation validate props for root component 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  let block1 = createBlock(\`<div><block-text-0/></div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    let txt1 = ctx['message'];
+    return block1([txt1]);
+  }
+}"
+`;
+
 exports[`props validation validate simple types 1`] = `
 "function anonymous(app, bdom, helpers
 ) {

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

@@ -1,5 +1,30 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`slots .translate slot props are translated 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  let { capture, markRaw } = helpers;
+  const comp1 = app.createComponent(\`Child\`, true, true, false, []);
+  
+  return function template(ctx, node, key = \\"\\") {
+    const ctx1 = capture(ctx);
+    return comp1({slots: markRaw({'default': {message: \`translated message\`}})}, key + \`__1\`, node, this, null);
+  }
+}"
+`;
+
+exports[`slots .translate slot props are translated 2`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  return function template(ctx, node, key = \\"\\") {
+    return text(ctx['props'].slots.default.message);
+  }
+}"
+`;
+
 exports[`slots can define a default content 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
@@ -201,6 +226,31 @@ exports[`slots can render only empty slot 1`] = `
 }"
 `;
 
+exports[`slots can use .translate suffix on slot props 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  let { capture, markRaw } = helpers;
+  const comp1 = app.createComponent(\`Child\`, true, true, false, []);
+  
+  return function template(ctx, node, key = \\"\\") {
+    const ctx1 = capture(ctx);
+    return comp1({slots: markRaw({'default': {message: \`some message\`}})}, key + \`__1\`, node, this, null);
+  }
+}"
+`;
+
+exports[`slots can use .translate suffix on slot props 2`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  
+  return function template(ctx, node, key = \\"\\") {
+    return text(ctx['props'].slots.default.message);
+  }
+}"
+`;
+
 exports[`slots can use component in default-content of t-slot 1`] = `
 "function anonymous(app, bdom, helpers
 ) {
@@ -1066,6 +1116,45 @@ exports[`slots multiple slots containing components 3`] = `
 }"
 `;
 
+exports[`slots named slot inside named slot in t-component 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  let { capture, markRaw } = helpers;
+  const comp1 = app.createComponent(null, false, true, false, []);
+  const comp2 = app.createComponent(\`Child\`, true, true, false, []);
+  
+  function slot1(ctx, node, key = \\"\\") {
+    const b2 = text(\` outer \`);
+    const ctx2 = capture(ctx);
+    const Comp1 = ctx['Child'];
+    const b4 = toggler(Comp1, comp1({slots: markRaw({'brol': {__render: slot2.bind(this), __ctx: ctx2}})}, (Comp1).name + key + \`__1\`, node, this, Comp1));
+    return multi([b2, b4]);
+  }
+  
+  function slot2(ctx, node, key = \\"\\") {
+    return text(ctx['value']);
+  }
+  
+  return function template(ctx, node, key = \\"\\") {
+    const ctx1 = capture(ctx);
+    return comp2({slots: markRaw({'brol': {__render: slot1.bind(this), __ctx: ctx1}})}, key + \`__2\`, node, this, null);
+  }
+}"
+`;
+
+exports[`slots named slot inside named slot in t-component 2`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  let { callSlot } = helpers;
+  
+  return function template(ctx, node, key = \\"\\") {
+    return callSlot(ctx, node, key, 'brol', false, {});
+  }
+}"
+`;
+
 exports[`slots named slot inside slot 1`] = `
 "function anonymous(app, bdom, helpers
 ) {

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

@@ -180,7 +180,7 @@ exports[`t-component switching dynamic component 2`] = `
 }"
 `;
 
-exports[`t-component switching dynamic component 3`] = `
+exports[`t-component switching dynamic component 4`] = `
 "function anonymous(app, bdom, helpers
 ) {
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;

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

@@ -44,7 +44,26 @@ exports[`t-model directive .trim modifier 1`] = `
   let { text, createBlock, list, multi, html, toggler, comment } = bdom;
   let { toNumber } = helpers;
   
-  let block1 = createBlock(\`<div><input block-property-0=\\"value\\" block-handler-1=\\"input\\"/><span><block-text-2/></span></div>\`);
+  let block1 = createBlock(\`<div><input block-property-0=\\"value\\" block-handler-1=\\"change\\"/><span><block-text-2/></span></div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    const bExpr1 = ctx['state'];
+    const expr1 = 'text';
+    let prop1 = bExpr1[expr1];
+    let hdlr1 = [(ev) => { bExpr1[expr1] = ev.target.value.trim(); }];
+    let txt1 = ctx['state'].text;
+    return block1([prop1, hdlr1, txt1]);
+  }
+}"
+`;
+
+exports[`t-model directive .trim modifier implies .lazy modifier 1`] = `
+"function anonymous(app, bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, comment } = bdom;
+  let { toNumber } = helpers;
+  
+  let block1 = createBlock(\`<div><input block-property-0=\\"value\\" block-handler-1=\\"change\\"/><span><block-text-2/></span></div>\`);
   
   return function template(ctx, node, key = \\"\\") {
     const bExpr1 = ctx['state'];

tests/components/basics.test.ts

@@ -5,6 +5,7 @@ import {
   nextAppError,
   nextTick,
   snapshotEverything,
+  steps,
   useLogLifecycle,
 } from "../helpers";
 import { markup } from "../../src/runtime/utils";
@@ -868,19 +869,26 @@ describe("basics", () => {
 
     const parent = await mount(Parent, fixture);
     expect(Object.keys(parent.__owl__.children).length).toStrictEqual(1);
-    expect([
-      "Child:setup",
-      "Child:willStart",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Child:setup",
+        "Child:willStart",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:mounted",
+      ]
+    `);
 
     parent.ifVar = false;
     parent.render();
     await nextTick();
     expect(Object.keys(parent.__owl__.children).length).toStrictEqual(0);
-    expect(["Child:willUnmount", "Child:willDestroy"]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Child:willUnmount",
+        "Child:willDestroy",
+      ]
+    `);
   });
 
   test("component children doesn't leak (t-key case)", async () => {
@@ -899,27 +907,31 @@ describe("basics", () => {
 
     const parent = await mount(Parent, fixture);
     expect(Object.keys(parent.__owl__.children).length).toStrictEqual(1);
-    expect([
-      "Child:setup",
-      "Child:willStart",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Child:setup",
+        "Child:willStart",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:mounted",
+      ]
+    `);
 
     parent.keyVar = 2;
     parent.render();
     await nextTick();
     expect(Object.keys(parent.__owl__.children).length).toStrictEqual(1);
-    expect([
-      "Child:setup",
-      "Child:willStart",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:willUnmount",
-      "Child:willDestroy",
-      "Child:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Child:setup",
+        "Child:willStart",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:willUnmount",
+        "Child:willDestroy",
+        "Child:mounted",
+      ]
+    `);
   });
 
   test("GrandChild display is controlled by its GrandParent", async () => {
@@ -943,20 +955,27 @@ describe("basics", () => {
 
     const parent = await mount(Parent, fixture);
     expect(fixture.innerHTML).toBe("<div></div>");
-    expect([
-      "GrandChild:setup",
-      "GrandChild:willStart",
-      "GrandChild:willRender",
-      "GrandChild:rendered",
-      "GrandChild:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "GrandChild:setup",
+        "GrandChild:willStart",
+        "GrandChild:willRender",
+        "GrandChild:rendered",
+        "GrandChild:mounted",
+      ]
+    `);
 
     parent.displayGrandChild = false;
     parent.render();
     await nextTick();
     expect(fixture.innerHTML).toBe("");
 
-    expect(["GrandChild:willUnmount", "GrandChild:willDestroy"]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "GrandChild:willUnmount",
+        "GrandChild:willDestroy",
+      ]
+    `);
   });
 });
 

tests/components/error_handling.test.ts

@@ -19,6 +19,7 @@ import {
   snapshotEverything,
   useLogLifecycle,
   nextAppError,
+  steps,
 } from "../helpers";
 import { OwlError } from "../../src/common/owl_error";
 
@@ -948,26 +949,28 @@ describe("can catch errors", () => {
     }
     await mount(Root, fixture);
     expect(fixture.innerHTML).toBe("<div><div>Error handled</div></div>");
-    expect([
-      "Root:setup",
-      "Root:willStart",
-      "Root:willRender",
-      "ErrorBoundary:setup",
-      "ErrorBoundary:willStart",
-      "Root:rendered",
-      "ErrorBoundary:willRender",
-      "ErrorComponent:setup",
-      "ErrorComponent:willStart",
-      "ErrorBoundary:rendered",
-      "ErrorComponent:willRender",
-      "ErrorComponent:rendered",
-      "ErrorComponent:mounted",
-      "boom",
-      "ErrorBoundary:willRender",
-      "ErrorBoundary:rendered",
-      "ErrorBoundary:mounted",
-      "Root:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Root:setup",
+        "Root:willStart",
+        "Root:willRender",
+        "ErrorBoundary:setup",
+        "ErrorBoundary:willStart",
+        "Root:rendered",
+        "ErrorBoundary:willRender",
+        "ErrorComponent:setup",
+        "ErrorComponent:willStart",
+        "ErrorBoundary:rendered",
+        "ErrorComponent:willRender",
+        "ErrorComponent:rendered",
+        "ErrorComponent:mounted",
+        "boom",
+        "ErrorBoundary:willRender",
+        "ErrorBoundary:rendered",
+        "ErrorBoundary:mounted",
+        "Root:mounted",
+      ]
+    `);
     expect(mockConsoleError).toBeCalledTimes(0);
     expect(mockConsoleWarn).toBeCalledTimes(0);
   });
@@ -998,21 +1001,23 @@ describe("can catch errors", () => {
     }
     await mount(Root, fixture);
     expect(fixture.innerHTML).toBe("<div>Error handled</div>");
-    expect([
-      "Root:setup",
-      "Root:willStart",
-      "Root:willRender",
-      "ErrorComponent:setup",
-      "ErrorComponent:willStart",
-      "Root:rendered",
-      "ErrorComponent:willRender",
-      "ErrorComponent:rendered",
-      "ErrorComponent:mounted",
-      "boom",
-      "Root:willRender",
-      "Root:rendered",
-      "Root:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Root:setup",
+        "Root:willStart",
+        "Root:willRender",
+        "ErrorComponent:setup",
+        "ErrorComponent:willStart",
+        "Root:rendered",
+        "ErrorComponent:willRender",
+        "ErrorComponent:rendered",
+        "ErrorComponent:mounted",
+        "boom",
+        "Root:willRender",
+        "Root:rendered",
+        "Root:mounted",
+      ]
+    `);
     expect(mockConsoleError).toBeCalledTimes(0);
     expect(mockConsoleWarn).toBeCalledTimes(0);
   });
@@ -1059,31 +1064,33 @@ describe("can catch errors", () => {
     }
     await mount(A, fixture);
     expect(fixture.innerHTML).toBe("<div><div>Error handled</div></div>");
-    expect([
-      "A:setup",
-      "A:willStart",
-      "A:willRender",
-      "B:setup",
-      "B:willStart",
-      "A:rendered",
-      "B:willRender",
-      "C:setup",
-      "C:willStart",
-      "B:rendered",
-      "C:willRender",
-      "Boom:setup",
-      "Boom:willStart",
-      "C:rendered",
-      "Boom:willRender",
-      "Boom:rendered",
-      "Boom:mounted",
-      "boom",
-      "C:willRender",
-      "C:rendered",
-      "C:mounted",
-      "B:mounted",
-      "A:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "A:setup",
+        "A:willStart",
+        "A:willRender",
+        "B:setup",
+        "B:willStart",
+        "A:rendered",
+        "B:willRender",
+        "C:setup",
+        "C:willStart",
+        "B:rendered",
+        "C:willRender",
+        "Boom:setup",
+        "Boom:willStart",
+        "C:rendered",
+        "Boom:willRender",
+        "Boom:rendered",
+        "Boom:mounted",
+        "boom",
+        "C:willRender",
+        "C:rendered",
+        "C:mounted",
+        "B:mounted",
+        "A:mounted",
+      ]
+    `);
     expect(mockConsoleError).toBeCalledTimes(0);
     expect(mockConsoleWarn).toBeCalledTimes(0);
   });
@@ -1130,31 +1137,33 @@ describe("can catch errors", () => {
     }
     await mount(Root, fixture);
     expect(fixture.innerHTML).toBe("<div>OK<div>Error handled</div></div>");
-    expect([
-      "Root:setup",
-      "Root:willStart",
-      "Root:willRender",
-      "OK:setup",
-      "OK:willStart",
-      "ErrorBoundary:setup",
-      "ErrorBoundary:willStart",
-      "Root:rendered",
-      "OK:willRender",
-      "OK:rendered",
-      "ErrorBoundary:willRender",
-      "ErrorComponent:setup",
-      "ErrorComponent:willStart",
-      "ErrorBoundary:rendered",
-      "ErrorComponent:willRender",
-      "ErrorComponent:rendered",
-      "ErrorComponent:mounted",
-      "boom",
-      "ErrorBoundary:willRender",
-      "ErrorBoundary:rendered",
-      "ErrorBoundary:mounted",
-      "OK:mounted",
-      "Root:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Root:setup",
+        "Root:willStart",
+        "Root:willRender",
+        "OK:setup",
+        "OK:willStart",
+        "ErrorBoundary:setup",
+        "ErrorBoundary:willStart",
+        "Root:rendered",
+        "OK:willRender",
+        "OK:rendered",
+        "ErrorBoundary:willRender",
+        "ErrorComponent:setup",
+        "ErrorComponent:willStart",
+        "ErrorBoundary:rendered",
+        "ErrorComponent:willRender",
+        "ErrorComponent:rendered",
+        "ErrorComponent:mounted",
+        "boom",
+        "ErrorBoundary:willRender",
+        "ErrorBoundary:rendered",
+        "ErrorBoundary:mounted",
+        "OK:mounted",
+        "Root:mounted",
+      ]
+    `);
     expect(mockConsoleError).toBeCalledTimes(0);
     expect(mockConsoleWarn).toBeCalledTimes(0);
   });
@@ -1481,35 +1490,39 @@ describe("can catch errors", () => {
 
     const parent = await mount(Parent, fixture);
     expect(fixture.innerHTML).toBe("1<div>abc</div>");
-    expect([
-      "Parent:setup",
-      "Parent:willStart",
-      "Parent:willRender",
-      "Child:setup",
-      "Child:willStart",
-      "Parent:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:mounted",
-      "Parent:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:setup",
+        "Parent:willStart",
+        "Parent:willRender",
+        "Child:setup",
+        "Child:willStart",
+        "Parent:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:mounted",
+        "Parent:mounted",
+      ]
+    `);
     parent.state.hasChild = false;
     await nextTick();
     await nextTick();
     await nextTick();
     await nextTick();
-    expect([
-      "Parent:willRender",
-      "Parent:rendered",
-      "Parent:willPatch",
-      "Child:willUnmount",
-      "Child:willDestroy",
-      "Parent:patched",
-      "Parent:willRender",
-      "Parent:rendered",
-      "Parent:willPatch",
-      "Parent:patched",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:willRender",
+        "Parent:rendered",
+        "Parent:willPatch",
+        "Child:willUnmount",
+        "Child:willDestroy",
+        "Parent:patched",
+        "Parent:willRender",
+        "Parent:rendered",
+        "Parent:willPatch",
+        "Parent:patched",
+      ]
+    `);
     expect(fixture.innerHTML).toBe("2");
   });
 
@@ -1542,13 +1555,15 @@ describe("can catch errors", () => {
     const parent = await mount(Parent, fixture);
     expect(fixture.innerHTML).toBe("1");
 
-    expect([
-      "Parent:setup",
-      "Parent:willStart",
-      "Parent:willRender",
-      "Parent:rendered",
-      "Parent:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:setup",
+        "Parent:willStart",
+        "Parent:willRender",
+        "Parent:rendered",
+        "Parent:mounted",
+      ]
+    `);
 
     parent.state.hasChild = true;
     await nextMicroTick();
@@ -1556,26 +1571,35 @@ describe("can catch errors", () => {
     await nextMicroTick();
     await nextMicroTick();
     await nextMicroTick();
-    expect([
-      "Parent:willRender",
-      "Child:setup",
-      "Child:willStart",
-      "Parent:rendered",
-      "Child:willRender",
-      "Child:rendered",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:willRender",
+        "Child:setup",
+        "Child:willStart",
+        "Parent:rendered",
+        "Child:willRender",
+        "Child:rendered",
+      ]
+    `);
     parent.state.hasChild = false;
     await nextTick();
-    expect([
-      "Parent:willRender",
-      "Parent:rendered",
-      "Child:willDestroy",
-      "Parent:willRender",
-      "Parent:rendered",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:willRender",
+        "Parent:rendered",
+        "Child:willDestroy",
+        "Parent:willRender",
+        "Parent:rendered",
+      ]
+    `);
     expect(fixture.innerHTML).toBe("1");
     await nextTick();
-    expect(["Parent:willPatch", "Parent:patched"]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:willPatch",
+        "Parent:patched",
+      ]
+    `);
     expect(fixture.innerHTML).toBe("2");
   });
 });

tests/components/hooks.test.ts

@@ -641,6 +641,56 @@ describe("hooks", () => {
       ]);
     });
 
+    test("effect types are inferred from dependencies", async () => {
+      // @ts-ignore (declared but never used)
+      // eslint-disable-next-line @typescript-eslint/no-unused-vars
+      class MyComponent extends Component {
+        static template = xml`<div/>`;
+
+        setup() {
+          useEffect(
+            (a, b) => {
+              expectType<number>(a);
+              expectType<string>(b);
+            },
+            () => [3, "hello"]
+          );
+        }
+      }
+    });
+
+    test("effect type allows an effect with partial dependencies parameters", async () => {
+      // @ts-ignore (declared but never used)
+      // eslint-disable-next-line @typescript-eslint/no-unused-vars
+      class MyComponent extends Component {
+        static template = xml`<div/>`;
+
+        setup() {
+          useEffect(
+            (a) => {
+              expectType<number>(a);
+            },
+            () => [3, "hello"]
+          );
+        }
+      }
+    });
+
+    test("effect type allows an effect with no dependency parameter", async () => {
+      // @ts-ignore (declared but never used)
+      // eslint-disable-next-line @typescript-eslint/no-unused-vars
+      class MyComponent extends Component {
+        static template = xml`<div/>`;
+
+        setup() {
+          useEffect(
+            () => {},
+            () => [3, "hello"]
+          );
+        }
+      }
+    });
+
     test("properly behaves when the effect function throws", async () => {
       let originalconsoleError = console.error;
       let originalconsoleWarn = console.warn;
@@ -673,3 +723,5 @@ describe("hooks", () => {
     });
   });
 });
+
+function expectType<T>(t: T) {}

tests/components/props.test.ts

@@ -1,5 +1,5 @@
 import { Component, mount, onWillUpdateProps, useState, xml } from "../../src";
-import { makeTestFixture, nextTick, snapshotEverything, useLogLifecycle } from "../helpers";
+import { makeTestFixture, nextTick, snapshotEverything, steps, useLogLifecycle } from "../helpers";
 
 let fixture: HTMLElement;
 
@@ -272,29 +272,61 @@ test("bound functions are considered 'alike'", async () => {
 
   const parent = await mount(Parent, fixture);
   expect(fixture.innerHTML).toBe("1child");
-  expect([
-    "Parent:setup",
-    "Parent:willStart",
-    "Parent:willRender",
-    "Child:setup",
-    "Child:willStart",
-    "Parent:rendered",
-    "Child:willRender",
-    "Child:rendered",
-    "Child:mounted",
-    "Parent:mounted",
-  ]).toBeLogged();
+  expect(steps.splice(0)).toMatchInlineSnapshot(`
+    Array [
+      "Parent:setup",
+      "Parent:willStart",
+      "Parent:willRender",
+      "Child:setup",
+      "Child:willStart",
+      "Parent:rendered",
+      "Child:willRender",
+      "Child:rendered",
+      "Child:mounted",
+      "Parent:mounted",
+    ]
+  `);
   parent.state.val = 3;
   await nextTick();
-  expect([
-    "Parent:willRender",
-    "Parent:rendered",
-    "Parent:willPatch",
-    "Parent:patched",
-  ]).toBeLogged();
+  expect(steps.splice(0)).toMatchInlineSnapshot(`
+    Array [
+      "Parent:willRender",
+      "Parent:rendered",
+      "Parent:willPatch",
+      "Parent:patched",
+    ]
+  `);
   expect(fixture.innerHTML).toBe("3child");
 });
 
+test("can use .translate suffix", async () => {
+  class Child extends Component {
+    static template = xml`<t t-esc="props.message"/>`;
+  }
+
+  class Parent extends Component {
+    static template = xml`<Child message.translate="some message"/>`;
+    static components = { Child };
+  }
+
+  await mount(Parent, fixture);
+  expect(fixture.innerHTML).toBe("some message");
+});
+
+test(".translate props are translated", async () => {
+  class Child extends Component {
+    static template = xml`<t t-esc="props.message"/>`;
+  }
+
+  class Parent extends Component {
+    static template = xml`<Child message.translate="some message"/>`;
+    static components = { Child };
+  }
+
+  await mount(Parent, fixture, { translateFn: () => "translated message" });
+  expect(fixture.innerHTML).toBe("translated message");
+});
+
 test("throw if prop uses an unknown suffix", async () => {
   class Child extends Component {
     static template = xml`<t t-esc="props.val"/>`;
@@ -330,29 +362,33 @@ test(".alike suffix in a simple case", async () => {
   }
 
   const parent = await mount(Parent, fixture);
-  expect([
-    "Parent:setup",
-    "Parent:willStart",
-    "Parent:willRender",
-    "Child:setup",
-    "Child:willStart",
-    "Parent:rendered",
-    "Child:willRender",
-    "Child:rendered",
-    "Child:mounted",
-    "Parent:mounted",
-  ]).toBeLogged();
+  expect(steps.splice(0)).toMatchInlineSnapshot(`
+    Array [
+      "Parent:setup",
+      "Parent:willStart",
+      "Parent:willRender",
+      "Child:setup",
+      "Child:willStart",
+      "Parent:rendered",
+      "Child:willRender",
+      "Child:rendered",
+      "Child:mounted",
+      "Parent:mounted",
+    ]
+  `);
 
   expect(fixture.innerHTML).toBe("01");
   parent.state.counter++;
   await nextTick();
   expect(fixture.innerHTML).toBe("11");
-  expect([
-    "Parent:willRender",
-    "Parent:rendered",
-    "Parent:willPatch",
-    "Parent:patched",
-  ]).toBeLogged();
+  expect(steps.splice(0)).toMatchInlineSnapshot(`
+    Array [
+      "Parent:willRender",
+      "Parent:rendered",
+      "Parent:willPatch",
+      "Parent:patched",
+    ]
+  `);
 });
 
 test(".alike suffix in a list", async () => {
@@ -388,36 +424,40 @@ test(".alike suffix in a list", async () => {
   }
 
   await mount(Parent, fixture);
-  expect([
-    "Parent:setup",
-    "Parent:willStart",
-    "Parent:willRender",
-    "Todo:setup",
-    "Todo:willStart",
-    "Todo:setup",
-    "Todo:willStart",
-    "Parent:rendered",
-    "Todo:willRender",
-    "Todo:rendered",
-    "Todo:willRender",
-    "Todo:rendered",
-    "Todo:mounted",
-    "Todo:mounted",
-    "Parent:mounted",
-  ]).toBeLogged();
+  expect(steps.splice(0)).toMatchInlineSnapshot(`
+    Array [
+      "Parent:setup",
+      "Parent:willStart",
+      "Parent:willRender",
+      "Todo:setup",
+      "Todo:willStart",
+      "Todo:setup",
+      "Todo:willStart",
+      "Parent:rendered",
+      "Todo:willRender",
+      "Todo:rendered",
+      "Todo:willRender",
+      "Todo:rendered",
+      "Todo:mounted",
+      "Todo:mounted",
+      "Parent:mounted",
+    ]
+  `);
 
   expect(fixture.innerHTML).toBe("<button>1</button><button>2V</button>");
   fixture.querySelector("button")?.click();
   await nextTick();
   expect(fixture.innerHTML).toBe("<button>1V</button><button>2V</button>");
-  expect([
-    "Parent:willRender",
-    "Parent:rendered",
-    "Todo:willRender",
-    "Todo:rendered",
-    "Todo:willPatch",
-    "Todo:patched",
-    "Parent:willPatch",
-    "Parent:patched",
-  ]).toBeLogged();
+  expect(steps.splice(0)).toMatchInlineSnapshot(`
+    Array [
+      "Parent:willRender",
+      "Parent:rendered",
+      "Todo:willRender",
+      "Todo:rendered",
+      "Todo:willPatch",
+      "Todo:patched",
+      "Parent:willPatch",
+      "Parent:patched",
+    ]
+  `);
 });

tests/components/props_validation.test.ts

@@ -594,7 +594,7 @@ describe("props validation", () => {
 
   test("props: can be defined with a boolean", async () => {
     class SubComp extends Component {
-      static props = { message: true };
+      static props = { message: true } as const;
     }
     expect(() => {
       validateProps(SubComp as any, {});
@@ -636,7 +636,7 @@ describe("props validation", () => {
 
   test("props: extra props cause an error, part 2", async () => {
     class SubComp extends Component {
-      static props = { message: true };
+      static props = { message: true } as const;
     }
     expect(() => {
       validateProps(SubComp as any, { message: 1, flag: true });
@@ -829,6 +829,52 @@ describe("props validation", () => {
     expect(error!).toBeDefined();
     expect(error!.message).toBe("Invalid props for component 'Child': 'message' is missing");
   });
+
+  test("can use custom class as type", async () => {
+    class CustomClass {
+      val = "hey";
+    }
+    class Child extends Component {
+      static props = { customObj: CustomClass };
+      static template = xml`<t t-esc="props.customObj.val"/>`;
+    }
+
+    class Parent extends Component {
+      static components = { Child };
+      static template = xml`<Child customObj="customObj" />`;
+      customObj = new CustomClass();
+    }
+
+    const app = new App(Parent, { test: true });
+    await app.mount(fixture);
+    expect(fixture.innerHTML).toBe("hey");
+  });
+
+  test("can use custom class as type: validation failure", async () => {
+    class CustomClass {}
+    class Child extends Component {
+      static props = { customObj: CustomClass };
+      static template = xml`<div>hey</div>`;
+    }
+
+    class Parent extends Component {
+      static components = { Child };
+      static template = xml`<Child customObj="customObj" />`;
+      customObj = {};
+    }
+
+    const app = new App(Parent, { test: true });
+    let error: OwlError | undefined;
+    const mountProm = app.mount(fixture).catch((e: Error) => (error = e));
+    await expect(nextAppError(app)).resolves.toThrow(
+      "Invalid props for component 'Child': 'customObj' is not a customclass"
+    );
+    await mountProm;
+    expect(error!).toBeDefined();
+    expect(error!.message).toBe(
+      "Invalid props for component 'Child': 'customObj' is not a customclass"
+    );
+  });
 });
 
 //------------------------------------------------------------------------------

tests/components/reactivity.test.ts

@@ -9,7 +9,7 @@ import {
   xml,
   toRaw,
 } from "../../src";
-import { makeTestFixture, nextTick, snapshotEverything, useLogLifecycle } from "../helpers";
+import { makeTestFixture, nextTick, snapshotEverything, steps, useLogLifecycle } from "../helpers";
 
 let fixture: HTMLElement;
 
@@ -175,30 +175,34 @@ describe("reactivity in lifecycle", () => {
 
     const parent = await mount(Parent, fixture);
     expect(fixture.innerHTML).toBe("2");
-    expect([
-      "Parent:setup",
-      "Parent:willStart",
-      "Parent:willRender",
-      "Child:setup",
-      "Child:willStart",
-      "Parent:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:mounted",
-      "Parent:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:setup",
+        "Parent:willStart",
+        "Parent:willRender",
+        "Child:setup",
+        "Child:willStart",
+        "Parent:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:mounted",
+        "Parent:mounted",
+      ]
+    `);
 
     parent.state.content = null;
     parent.state.renderChild = false;
     await nextTick();
-    expect([
-      "Parent:willRender",
-      "Parent:rendered",
-      "Parent:willPatch",
-      "Child:willUnmount",
-      "Child:willDestroy",
-      "Parent:patched",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:willRender",
+        "Parent:rendered",
+        "Parent:willPatch",
+        "Child:willUnmount",
+        "Child:willDestroy",
+        "Parent:patched",
+      ]
+    `);
   });
 
   test("Component is automatically subscribed to reactive object received as prop", async () => {

tests/components/rendering.test.ts

@@ -6,6 +6,7 @@ import {
   useLogLifecycle,
   makeDeferred,
   nextMicroTick,
+  steps,
 } from "../helpers";
 
 let fixture: HTMLElement;
@@ -41,28 +42,32 @@ describe("rendering semantics", () => {
     const parent = await mount(Parent, fixture);
 
     expect(fixture.innerHTML).toBe("Achild");
-    expect([
-      "Parent:setup",
-      "Parent:willStart",
-      "Parent:willRender",
-      "Child:setup",
-      "Child:willStart",
-      "Parent:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:mounted",
-      "Parent:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:setup",
+        "Parent:willStart",
+        "Parent:willRender",
+        "Child:setup",
+        "Child:willStart",
+        "Parent:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:mounted",
+        "Parent:mounted",
+      ]
+    `);
 
     parent.state.value = "B";
     await nextTick();
     expect(fixture.innerHTML).toBe("Bchild");
-    expect([
-      "Parent:willRender",
-      "Parent:rendered",
-      "Parent:willPatch",
-      "Parent:patched",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:willRender",
+        "Parent:rendered",
+        "Parent:willPatch",
+        "Parent:patched",
+      ]
+    `);
   });
 
   test("can force a render to update sub tree", async () => {
@@ -167,18 +172,20 @@ describe("rendering semantics", () => {
     const parent = await mount(Parent, fixture, { env });
 
     expect(fixture.innerHTML).toBe("parentAchild3");
-    expect([
-      "Parent:setup",
-      "Parent:willStart",
-      "Parent:willRender",
-      "Child:setup",
-      "Child:willStart",
-      "Parent:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:mounted",
-      "Parent:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:setup",
+        "Parent:willStart",
+        "Parent:willRender",
+        "Child:setup",
+        "Child:willStart",
+        "Parent:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:mounted",
+        "Parent:mounted",
+      ]
+    `);
 
     value = 4;
     parent.render(true);
@@ -187,30 +194,34 @@ describe("rendering semantics", () => {
     await nextMicroTick();
     await nextMicroTick();
     await nextMicroTick();
-    expect([
-      "Parent:willRender",
-      "Child:willUpdateProps",
-      "Parent:rendered",
-      "Child:willRender",
-      "Child:rendered",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:willRender",
+        "Child:willUpdateProps",
+        "Parent:rendered",
+        "Child:willRender",
+        "Child:rendered",
+      ]
+    `);
 
     parent.state.value = "B";
 
     await nextTick();
 
     expect(fixture.innerHTML).toBe("parentBchild4");
-    expect([
-      "Parent:willRender",
-      "Child:willUpdateProps",
-      "Parent:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Parent:willPatch",
-      "Child:willPatch",
-      "Child:patched",
-      "Parent:patched",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:willRender",
+        "Child:willUpdateProps",
+        "Parent:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Parent:willPatch",
+        "Child:willPatch",
+        "Child:patched",
+        "Parent:patched",
+      ]
+    `);
   });
 
   test("props are reactive", async () => {
@@ -235,23 +246,32 @@ describe("rendering semantics", () => {
 
     const parent = await mount(Parent, fixture);
     expect(fixture.innerHTML).toBe("1");
-    expect([
-      "Parent:setup",
-      "Parent:willStart",
-      "Parent:willRender",
-      "Child:setup",
-      "Child:willStart",
-      "Parent:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:mounted",
-      "Parent:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:setup",
+        "Parent:willStart",
+        "Parent:willRender",
+        "Child:setup",
+        "Child:willStart",
+        "Parent:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:mounted",
+        "Parent:mounted",
+      ]
+    `);
 
     parent.state.b = 3;
     await nextTick();
     expect(fixture.innerHTML).toBe("3");
-    expect(["Child:willRender", "Child:rendered", "Child:willPatch", "Child:patched"]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Child:willRender",
+        "Child:rendered",
+        "Child:willPatch",
+        "Child:patched",
+      ]
+    `);
   });
 
   test("props are reactive (nested prop)", async () => {
@@ -278,37 +298,48 @@ describe("rendering semantics", () => {
 
     const parent = await mount(Parent, fixture);
     expect(fixture.innerHTML).toBe("1");
-    expect([
-      "Parent:setup",
-      "Parent:willStart",
-      "Parent:willRender",
-      "Child:setup",
-      "Child:willStart",
-      "Parent:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:mounted",
-      "Parent:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:setup",
+        "Parent:willStart",
+        "Parent:willRender",
+        "Child:setup",
+        "Child:willStart",
+        "Parent:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:mounted",
+        "Parent:mounted",
+      ]
+    `);
 
     parent.state.b.c = 3; // parent is now subscribed to 'b' key
     await nextTick();
     expect(fixture.innerHTML).toBe("3");
-    expect(["Child:willRender", "Child:rendered", "Child:willPatch", "Child:patched"]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Child:willRender",
+        "Child:rendered",
+        "Child:willPatch",
+        "Child:patched",
+      ]
+    `);
 
     parent.state.b = { c: 444 }; // triggers a parent and a child render
     await nextTick();
     expect(fixture.innerHTML).toBe("444");
-    expect([
-      "Parent:willRender",
-      "Parent:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Parent:willPatch",
-      "Parent:patched",
-      "Child:willPatch",
-      "Child:patched",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:willRender",
+        "Parent:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Parent:willPatch",
+        "Parent:patched",
+        "Child:willPatch",
+        "Child:patched",
+      ]
+    `);
   });
 
   test("works as expected for dynamic number of props", async () => {
@@ -366,41 +397,45 @@ describe("rendering semantics", () => {
 
     const parent = await mount(A, fixture);
     expect(fixture.innerHTML).toBe("11");
-    expect([
-      "A:setup",
-      "A:willStart",
-      "A:willRender",
-      "B:setup",
-      "B:willStart",
-      "A:rendered",
-      "B:willRender",
-      "C:setup",
-      "C:willStart",
-      "B:rendered",
-      "C:willRender",
-      "C:rendered",
-      "C:mounted",
-      "B:mounted",
-      "A:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "A:setup",
+        "A:willStart",
+        "A:willRender",
+        "B:setup",
+        "B:willStart",
+        "A:rendered",
+        "B:willRender",
+        "C:setup",
+        "C:willStart",
+        "B:rendered",
+        "C:willRender",
+        "C:rendered",
+        "C:mounted",
+        "B:mounted",
+        "A:mounted",
+      ]
+    `);
 
     parent.state.obj.val = 3;
     await nextTick();
     expect(fixture.innerHTML).toBe("33");
-    expect([
-      "A:willRender",
-      "A:rendered",
-      "C:willRender",
-      "C:rendered",
-      "A:willPatch",
-      "A:patched",
-      "C:willPatch",
-      "C:patched",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "A:willRender",
+        "A:rendered",
+        "C:willRender",
+        "C:rendered",
+        "A:willPatch",
+        "A:patched",
+        "C:willPatch",
+        "C:patched",
+      ]
+    `);
 
     def.resolve();
     await nextTick();
-    expect([]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`Array []`);
   });
 });
 
@@ -431,51 +466,67 @@ test("force render in case of existing render", async () => {
   }
   const parent = await mount(A, fixture);
   expect(fixture.innerHTML).toBe("C1");
-  expect([
-    "A:setup",
-    "A:willStart",
-    "A:willRender",
-    "B:setup",
-    "B:willStart",
-    "A:rendered",
-    "B:willRender",
-    "C:setup",
-    "C:willStart",
-    "B:rendered",
-    "C:willRender",
-    "C:rendered",
-    "C:mounted",
-    "B:mounted",
-    "A:mounted",
-  ]).toBeLogged();
+  expect(steps.splice(0)).toMatchInlineSnapshot(`
+    Array [
+      "A:setup",
+      "A:willStart",
+      "A:willRender",
+      "B:setup",
+      "B:willStart",
+      "A:rendered",
+      "B:willRender",
+      "C:setup",
+      "C:willStart",
+      "B:rendered",
+      "C:willRender",
+      "C:rendered",
+      "C:mounted",
+      "B:mounted",
+      "A:mounted",
+    ]
+  `);
 
   // trigger a new rendering, blocked in B
   parent.state.val = 2;
   await nextTick();
-  expect(["A:willRender", "B:willUpdateProps", "A:rendered"]).toBeLogged();
+  expect(steps.splice(0)).toMatchInlineSnapshot(`
+    Array [
+      "A:willRender",
+      "B:willUpdateProps",
+      "A:rendered",
+    ]
+  `);
 
   // initiate a new render with deep=true. it should cancel the current render
   // and also be blocked in B
   parent.render(true);
   await nextTick();
-  expect(["A:willRender", "B:willUpdateProps", "A:rendered"]).toBeLogged();
+  expect(steps.splice(0)).toMatchInlineSnapshot(`
+    Array [
+      "A:willRender",
+      "B:willUpdateProps",
+      "A:rendered",
+    ]
+  `);
 
   def.resolve();
   await nextTick();
   // we check here that the render reaches C (so, that it was properly forced)
-  expect([
-    "B:willRender",
-    "C:willUpdateProps",
-    "B:rendered",
-    "C:willRender",
-    "C:rendered",
-    "A:willPatch",
-    "B:willPatch",
-    "C:willPatch",
-    "C:patched",
-    "B:patched",
-    "A:patched",
-  ]).toBeLogged();
+  expect(steps.splice(0)).toMatchInlineSnapshot(`
+    Array [
+      "B:willRender",
+      "C:willUpdateProps",
+      "B:rendered",
+      "C:willRender",
+      "C:rendered",
+      "A:willPatch",
+      "B:willPatch",
+      "C:willPatch",
+      "C:patched",
+      "B:patched",
+      "A:patched",
+    ]
+  `);
 });
 
 test("children, default props and renderings", async () => {
@@ -503,26 +554,30 @@ test("children, default props and renderings", async () => {
   const parent = await mount(Parent, fixture);
 
   expect(fixture.innerHTML).toBe("Achild");
-  expect([
-    "Parent:setup",
-    "Parent:willStart",
-    "Parent:willRender",
-    "Child:setup",
-    "Child:willStart",
-    "Parent:rendered",
-    "Child:willRender",
-    "Child:rendered",
-    "Child:mounted",
-    "Parent:mounted",
-  ]).toBeLogged();
+  expect(steps.splice(0)).toMatchInlineSnapshot(`
+    Array [
+      "Parent:setup",
+      "Parent:willStart",
+      "Parent:willRender",
+      "Child:setup",
+      "Child:willStart",
+      "Parent:rendered",
+      "Child:willRender",
+      "Child:rendered",
+      "Child:mounted",
+      "Parent:mounted",
+    ]
+  `);
 
   parent.state.value = "B";
   await nextTick();
   expect(fixture.innerHTML).toBe("Bchild");
-  expect([
-    "Parent:willRender",
-    "Parent:rendered",
-    "Parent:willPatch",
-    "Parent:patched",
-  ]).toBeLogged();
+  expect(steps.splice(0)).toMatchInlineSnapshot(`
+    Array [
+      "Parent:willRender",
+      "Parent:rendered",
+      "Parent:willPatch",
+      "Parent:patched",
+    ]
+  `);
 });

tests/components/slots.test.ts

@@ -179,6 +179,34 @@ describe("slots", () => {
     expect(fixture.innerHTML).toBe("<span>default empty</span>");
   });
 
+  test("can use .translate suffix on slot props", async () => {
+    class Child extends Component {
+      static template = xml`<t t-esc="props.slots.default.message"/>`;
+    }
+
+    class Parent extends Component {
+      static template = xml`<Child><t t-set-slot="default" message.translate="some message"/></Child>`;
+      static components = { Child };
+    }
+
+    await mount(Parent, fixture);
+    expect(fixture.innerHTML).toBe("some message");
+  });
+
+  test(".translate slot props are translated", async () => {
+    class Child extends Component {
+      static template = xml`<t t-esc="props.slots.default.message"/>`;
+    }
+
+    class Parent extends Component {
+      static template = xml`<Child><t t-set-slot="default" message.translate="some message"/></Child>`;
+      static components = { Child };
+    }
+
+    await mount(Parent, fixture, { translateFn: () => "translated message" });
+    expect(fixture.innerHTML).toBe("translated message");
+  });
+
   test("default slot with slot scope: shorthand syntax", async () => {
     let child: any;
     class Child extends Component {
@@ -1673,6 +1701,31 @@ describe("slots", () => {
     expect(fixture.innerHTML).toBe("<div><div><p>Ablip</p><div><p>Bblip</p></div></div></div>");
   });
 
+  test("named slot inside named slot in t-component", async () => {
+    class Child extends Component {
+      static template = xml`<t t-slot="brol"/>`;
+    }
+    class Parent extends Component {
+      static template = xml`
+        <Child>
+          <t t-set-slot="brol">
+            outer
+            <t t-component="Child">
+              <t t-set-slot="brol">
+                <t t-esc="value"/>
+              </t>
+            </t>
+          </t>
+        </Child>`;
+      static components = { Child };
+      Child = Child;
+      value = "inner";
+    }
+    await mount(Parent, fixture);
+
+    expect(fixture.innerHTML).toBe(" outer inner");
+  });
+
   test("can render only empty slot", async () => {
     class Parent extends Component {
       static template = xml`<t t-slot="default"/>`;

tests/components/t_component.test.ts

@@ -1,5 +1,5 @@
 import { Component, mount, useState, xml } from "../../src";
-import { makeTestFixture, nextTick, snapshotEverything, useLogLifecycle } from "../helpers";
+import { makeTestFixture, nextTick, snapshotEverything, steps, useLogLifecycle } from "../helpers";
 
 let fixture: HTMLElement;
 
@@ -29,18 +29,20 @@ describe("t-component", () => {
     await mount(Parent, fixture);
 
     expect(fixture.innerHTML).toBe("<div>child</div>");
-    expect([
-      "Parent:setup",
-      "Parent:willStart",
-      "Parent:willRender",
-      "Child:setup",
-      "Child:willStart",
-      "Parent:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:mounted",
-      "Parent:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:setup",
+        "Parent:willStart",
+        "Parent:willRender",
+        "Child:setup",
+        "Child:willStart",
+        "Parent:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:mounted",
+        "Parent:mounted",
+      ]
+    `);
   });
 
   test("switching dynamic component", async () => {
@@ -68,36 +70,40 @@ describe("t-component", () => {
 
     const parent = await mount(Parent, fixture);
     expect(fixture.innerHTML).toBe("<div>child a</div>");
-    expect([
-      "Parent:setup",
-      "Parent:willStart",
-      "Parent:willRender",
-      "ChildA:setup",
-      "ChildA:willStart",
-      "Parent:rendered",
-      "ChildA:willRender",
-      "ChildA:rendered",
-      "ChildA:mounted",
-      "Parent:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:setup",
+        "Parent:willStart",
+        "Parent:willRender",
+        "ChildA:setup",
+        "ChildA:willStart",
+        "Parent:rendered",
+        "ChildA:willRender",
+        "ChildA:rendered",
+        "ChildA:mounted",
+        "Parent:mounted",
+      ]
+    `);
 
     parent.Child = ChildB;
     parent.render();
     await nextTick();
     expect(fixture.innerHTML).toBe("child b");
-    expect([
-      "Parent:willRender",
-      "ChildB:setup",
-      "ChildB:willStart",
-      "Parent:rendered",
-      "ChildB:willRender",
-      "ChildB:rendered",
-      "Parent:willPatch",
-      "ChildA:willUnmount",
-      "ChildA:willDestroy",
-      "ChildB:mounted",
-      "Parent:patched",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:willRender",
+        "ChildB:setup",
+        "ChildB:willStart",
+        "Parent:rendered",
+        "ChildB:willRender",
+        "ChildB:rendered",
+        "Parent:willPatch",
+        "ChildA:willUnmount",
+        "ChildA:willDestroy",
+        "ChildB:mounted",
+        "Parent:patched",
+      ]
+    `);
   });
 
   test("can switch between dynamic components without the need for a t-key", async () => {

tests/components/t_foreach.test.ts

@@ -4,6 +4,7 @@ import {
   nextAppError,
   nextTick,
   snapshotEverything,
+  steps,
   useLogLifecycle,
 } from "../helpers";
 
@@ -91,23 +92,25 @@ describe("list of components", () => {
     expect(fixture.innerHTML).toBe(
       "<div><ul><li><div>1</div></li><li><div>2</div></li></ul></div>"
     );
-    expect([
-      "Parent:setup",
-      "Parent:willStart",
-      "Parent:willRender",
-      "Child:setup",
-      "Child:willStart",
-      "Child:setup",
-      "Child:willStart",
-      "Parent:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:mounted",
-      "Child:mounted",
-      "Parent:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:setup",
+        "Parent:willStart",
+        "Parent:willRender",
+        "Child:setup",
+        "Child:willStart",
+        "Child:setup",
+        "Child:willStart",
+        "Parent:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:mounted",
+        "Child:mounted",
+        "Parent:mounted",
+      ]
+    `);
   });
 
   test("reconciliation alg works for t-foreach in t-foreach", async () => {

tests/components/t_model.test.ts

@@ -331,6 +331,32 @@ describe("t-model directive", () => {
     expect(fixture.innerHTML).toBe("<div><input><span>test</span></div>");
   });
 
+  test(".trim modifier implies .lazy modifier", async () => {
+    class SomeComponent extends Component {
+      static template = xml`
+        <div>
+            <input t-model.trim="state.text"/>
+            <span><t t-esc="state.text"/></span>
+        </div>
+      `;
+      state = useState({ text: "" });
+    }
+    const comp = await mount(SomeComponent, fixture);
+
+    expect(fixture.innerHTML).toBe("<div><input><span></span></div>");
+
+    const input = fixture.querySelector("input")!;
+    input.value = "test ";
+    input.dispatchEvent(new Event("input"));
+    await nextTick();
+    expect(comp.state.text).toBe("");
+    expect(fixture.innerHTML).toBe("<div><input><span></span></div>");
+    input.dispatchEvent(new Event("change"));
+    await nextTick();
+    expect(comp.state.text).toBe("test");
+    expect(fixture.innerHTML).toBe("<div><input><span>test</span></div>");
+  });
+
   test(".number modifier", async () => {
     class SomeComponent extends Component {
       static template = xml`

tests/helpers.ts

@@ -137,7 +137,7 @@ export function snapshotEverything() {
   };
 }
 
-const steps: string[] = [];
+export const steps: string[] = [];
 
 export function logStep(step: string) {
   steps.push(step);

tests/reactivity.test.ts

@@ -17,6 +17,7 @@ import {
   nextMicroTick,
   nextTick,
   snapshotEverything,
+  steps,
   useLogLifecycle,
 } from "./helpers";
 
@@ -992,32 +993,33 @@ describe("Reactivity", () => {
     const obj2 = createReactive({ b: {} }, () => n2++);
     const obj3 = createReactive({ c: {} }, () => n3++);
 
+    // assign the same object should'nt notify reactivity
     obj2.b = obj2.b;
     obj2.b;
     obj3.c = obj3.c;
     obj3.c;
     expect(n1).toBe(0);
-    expect(n2).toBe(1);
-    expect(n3).toBe(1);
+    expect(n2).toBe(0);
+    expect(n3).toBe(0);
 
     obj2.b = obj1;
     obj2.b;
     obj3.c = obj1;
     obj3.c;
     expect(n1).toBe(0);
-    expect(n2).toBe(2);
-    expect(n3).toBe(2);
+    expect(n2).toBe(1);
+    expect(n3).toBe(1);
 
     obj1.a = obj1.a + 2;
     obj1.a;
     expect(n1).toBe(1);
-    expect(n2).toBe(2);
-    expect(n3).toBe(2);
+    expect(n2).toBe(1);
+    expect(n3).toBe(1);
 
     obj2.b.a = obj2.b.a + 1;
     expect(n1).toBe(2);
-    expect(n2).toBe(3);
-    expect(n3).toBe(2);
+    expect(n2).toBe(2);
+    expect(n3).toBe(1);
   });
 
   test("reactive inside other: reading the inner reactive from outer doesn't affect the inner's subscriptions", async () => {
@@ -1292,6 +1294,12 @@ describe("Collections", () => {
 
       state.add(3); // setting unobserved key doesn't notify
       expect(observer).toHaveBeenCalledTimes(3);
+      expect(state.has(3)).toBe(true); // subscribe to 3
+      state.add(3); // adding observed key doesn't notify if key was already present
+      expect(observer).toHaveBeenCalledTimes(3);
+      expect(state.has(4)).toBe(false); // subscribe to 4
+      state.delete(4); // deleting observed key doesn't notify if key was already not present
+      expect(observer).toHaveBeenCalledTimes(3);
     });
 
     test("iterating on keys returns reactives", async () => {
@@ -1485,6 +1493,12 @@ describe("Collections", () => {
 
       state.set(3, 4); // setting unobserved key doesn't notify
       expect(observer).toHaveBeenCalledTimes(3);
+      expect(state.has(3)).toBe(true); // subscribe to 3
+      state.set(3, 4); // setting the same value doesn't notify
+      expect(observer).toHaveBeenCalledTimes(3);
+      expect(state.has(4)).toBe(false); // subscribe to 4
+      state.delete(4); // deleting observed key doesn't notify if key was already not present
+      expect(observer).toHaveBeenCalledTimes(3);
     });
 
     test("checking for a key with 'get' subscribes the callback to changes to that key", () => {
@@ -1510,6 +1524,12 @@ describe("Collections", () => {
 
       state.set(3, 4); // setting unobserved key doesn't notify
       expect(observer).toHaveBeenCalledTimes(3);
+      expect(state.get(3)).toBe(4); // subscribe to 3
+      state.set(3, 4); // setting the same value doesn't notify
+      expect(observer).toHaveBeenCalledTimes(3);
+      expect(state.get(4)).toBe(undefined); // subscribe to 4
+      state.delete(4); // deleting observed key doesn't notify if key was already not present
+      expect(observer).toHaveBeenCalledTimes(3);
     });
 
     test("getting values returns a reactive", async () => {
@@ -1832,37 +1852,41 @@ describe("Reactivity: useState", () => {
       }
     }
     await mount(Parent, fixture);
-    expect([
-      "Parent:setup",
-      "Parent:willStart",
-      "Parent:willRender",
-      "Child:setup",
-      "Child:willStart",
-      "Child:setup",
-      "Child:willStart",
-      "Parent:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:mounted",
-      "Child:mounted",
-      "Parent:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:setup",
+        "Parent:willStart",
+        "Parent:willRender",
+        "Child:setup",
+        "Child:willStart",
+        "Child:setup",
+        "Child:willStart",
+        "Parent:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:mounted",
+        "Child:mounted",
+        "Parent:mounted",
+      ]
+    `);
 
     expect(fixture.innerHTML).toBe("<div><span>123</span><span>123</span></div>");
     testContext.value = 321;
     await nextTick();
-    expect([
-      "Child:willRender",
-      "Child:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:willPatch",
-      "Child:patched",
-      "Child:willPatch",
-      "Child:patched",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Child:willRender",
+        "Child:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:willPatch",
+        "Child:patched",
+        "Child:willPatch",
+        "Child:patched",
+      ]
+    `);
     expect(fixture.innerHTML).toBe("<div><span>321</span><span>321</span></div>");
   });
 
@@ -1886,38 +1910,49 @@ describe("Reactivity: useState", () => {
     }
 
     await mount(Parent, fixture);
-    expect([
-      "Parent:setup",
-      "Parent:willStart",
-      "Parent:willRender",
-      "Child:setup",
-      "Child:willStart",
-      "Child:setup",
-      "Child:willStart",
-      "Parent:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:mounted",
-      "Child:mounted",
-      "Parent:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:setup",
+        "Parent:willStart",
+        "Parent:willRender",
+        "Child:setup",
+        "Child:willStart",
+        "Child:setup",
+        "Child:willStart",
+        "Parent:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:mounted",
+        "Child:mounted",
+        "Parent:mounted",
+      ]
+    `);
 
     expect(fixture.innerHTML).toBe("<div><span>123</span><span>123</span></div>");
     testContext.value = 321;
     await nextMicroTick();
     await nextMicroTick();
-    expect([
-      "Child:willRender",
-      "Child:rendered",
-      "Child:willRender",
-      "Child:rendered",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Child:willRender",
+        "Child:rendered",
+        "Child:willRender",
+        "Child:rendered",
+      ]
+    `);
     expect(fixture.innerHTML).toBe("<div><span>123</span><span>123</span></div>");
 
     await nextTick();
-    expect(["Child:willPatch", "Child:patched", "Child:willPatch", "Child:patched"]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Child:willPatch",
+        "Child:patched",
+        "Child:willPatch",
+        "Child:patched",
+      ]
+    `);
     expect(fixture.innerHTML).toBe("<div><span>321</span><span>321</span></div>");
   });
 
@@ -1951,43 +1986,54 @@ describe("Reactivity: useState", () => {
 
     await mount(GrandFather, fixture);
     expect(fixture.innerHTML).toBe("<div><span>123</span><div><span>123</span></div></div>");
-    expect([
-      "GrandFather:setup",
-      "GrandFather:willStart",
-      "GrandFather:willRender",
-      "Child:setup",
-      "Child:willStart",
-      "Parent:setup",
-      "Parent:willStart",
-      "GrandFather:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Parent:willRender",
-      "Child:setup",
-      "Child:willStart",
-      "Parent:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:mounted",
-      "Parent:mounted",
-      "Child:mounted",
-      "GrandFather:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "GrandFather:setup",
+        "GrandFather:willStart",
+        "GrandFather:willRender",
+        "Child:setup",
+        "Child:willStart",
+        "Parent:setup",
+        "Parent:willStart",
+        "GrandFather:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Parent:willRender",
+        "Child:setup",
+        "Child:willStart",
+        "Parent:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:mounted",
+        "Parent:mounted",
+        "Child:mounted",
+        "GrandFather:mounted",
+      ]
+    `);
 
     testContext.value = 321;
     await nextMicroTick();
     await nextMicroTick();
     expect(fixture.innerHTML).toBe("<div><span>123</span><div><span>123</span></div></div>");
-    expect([
-      "Child:willRender",
-      "Child:rendered",
-      "Child:willRender",
-      "Child:rendered",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Child:willRender",
+        "Child:rendered",
+        "Child:willRender",
+        "Child:rendered",
+      ]
+    `);
 
     await nextTick();
     expect(fixture.innerHTML).toBe("<div><span>321</span><div><span>321</span></div></div>");
-    expect(["Child:willPatch", "Child:patched", "Child:willPatch", "Child:patched"]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Child:willPatch",
+        "Child:patched",
+        "Child:willPatch",
+        "Child:patched",
+      ]
+    `);
   });
 
   test("one components can subscribe twice to same context", async () => {
@@ -2163,38 +2209,49 @@ describe("Reactivity: useState", () => {
     }
     const parent = await mount(Parent, fixture);
     expect(fixture.innerHTML).toBe("<div><span>123</span></div>");
-    expect([
-      "Parent:setup",
-      "Parent:willStart",
-      "Parent:willRender",
-      "Child:setup",
-      "Child:willStart",
-      "Parent:rendered",
-      "Child:willRender",
-      "Child:rendered",
-      "Child:mounted",
-      "Parent:mounted",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:setup",
+        "Parent:willStart",
+        "Parent:willRender",
+        "Child:setup",
+        "Child:willStart",
+        "Parent:rendered",
+        "Child:willRender",
+        "Child:rendered",
+        "Child:mounted",
+        "Parent:mounted",
+      ]
+    `);
 
     testContext.a = 321;
     await nextTick();
-    expect(["Child:willRender", "Child:rendered", "Child:willPatch", "Child:patched"]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Child:willRender",
+        "Child:rendered",
+        "Child:willPatch",
+        "Child:patched",
+      ]
+    `);
 
     parent.state.flag = false;
     await nextTick();
     expect(fixture.innerHTML).toBe("<div></div>");
-    expect([
-      "Parent:willRender",
-      "Parent:rendered",
-      "Parent:willPatch",
-      "Child:willUnmount",
-      "Child:willDestroy",
-      "Parent:patched",
-    ]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`
+      Array [
+        "Parent:willRender",
+        "Parent:rendered",
+        "Parent:willPatch",
+        "Child:willUnmount",
+        "Child:willDestroy",
+        "Parent:patched",
+      ]
+    `);
 
     testContext.a = 456;
     await nextTick();
-    expect([]).toBeLogged();
+    expect(steps.splice(0)).toMatchInlineSnapshot(`Array []`);
   });
 
   test("destroyed component before being mounted is inactive", async () => {

tools/devtools/manifest-chrome.json

@@ -1,6 +1,6 @@
 {
   "name": "Owl devtools",
-  "version": "1.2.1",
+  "version": "1.2.2",
   "manifest_version": 3,
   "description": "Chrome devtools extension for Odoo Owl framework",
   "icons": {
@@ -14,7 +14,7 @@
     "default_popup": "popup_app/popup.html"
   },
   "permissions": ["scripting", "storage"],
-  "host_permissions": ["http://*/*", "https://*/*"],
+  "host_permissions": ["http://*/*", "https://*/*", "file://*"],
   "content_security_policy": {
     "script-src": "self",
     "object-src": "self"

tools/devtools/manifest-firefox.json

@@ -1,6 +1,6 @@
 {
   "name": "Owl devtools",
-  "version": "1.0",
+  "version": "1.0.0",
   "description": "Firefox devtools extension for Odoo Owl framework",
   "manifest_version": 2,
   "browser_specific_settings": {
@@ -29,7 +29,7 @@
     "scripts": ["background.js"]
   },
   "devtools_page": "devtools_app/devtools.html",
-  "content_security_policy": "script-src 'self' 'unsafe-eval' blob:; object-src 'self'",
+  "content_security_policy": "script-src 'self'; object-src 'self'",
   "content_scripts": [
     {
       "matches": ["<all_urls>"],

tools/devtools/src/background.js

@@ -1,9 +1,7 @@
-import { IS_FIREFOX, getActiveTabURL } from "./utils";
+import { IS_FIREFOX, getActiveTabURL, browserInstance } from "./utils";
 
 let owlStatus = 0;
 
-const browserInstance = IS_FIREFOX ? browser : chrome;
-
 // Used to keep track of the tabs where the owl devtools have been opened
 const activePanels = new Map();
 
@@ -71,6 +69,9 @@ function checkOwlStatus(tabId) {
 browserInstance.runtime.onMessage.addListener(async (message, sender, sendResponse) => {
   // Send back the owl status to the sender
   if (message.type === "getOwlStatus") {
+    if (IS_FIREFOX) {
+      return { result: owlStatus };
+    }
     sendResponse({ result: owlStatus });
     return true;
   } else if (message.type === "owlStatus") {
@@ -112,11 +113,10 @@ browserInstance.runtime.onMessage.addListener(async (message, sender, sendRespon
     }, 750);
     activePanels.set(message.id, { port: port, expirationTimeout: expirationTimeout });
     // This is solely for firefox which doesnt allow access to the chrome.tabs api inside devtools
+    // We therefore only use the firefox syntax to send the response here
   } else if (message.type === "getActiveTabURL") {
-    getActiveTabURL().then((tab) => {
-      sendResponse({ result: tab });
-    });
-    return true;
+    const tab = await getActiveTabURL();
+    return { result: tab };
   } else {
     const destinationPanel = activePanels.get(sender.tab.id);
     if (destinationPanel) {

tools/devtools/src/content.js

@@ -1,5 +1,5 @@
 import globalHook from "./page_scripts/owl_devtools_global_hook";
-import { IS_FIREFOX } from "./utils";
+import { IS_FIREFOX, browserInstance } from "./utils";
 
 // Relays the owlDevtools__... type top window messages to the background script so that it can relay it to the devtools app
 window.addEventListener(
@@ -7,7 +7,7 @@ window.addEventListener(
   function (event) {
     if (event.data.type && event.data.source === "owl-devtools") {
       try {
-        chrome.runtime.sendMessage(
+        browserInstance.runtime.sendMessage(
           event.data.data
             ? { type: event.data.type, data: event.data.data, origin: event.data.origin }
             : { type: event.data.type, origin: event.data.origin }

tools/devtools/src/devtools_app/devtools.js

@@ -1,7 +1,6 @@
-import { IS_FIREFOX } from "../utils";
+import { IS_FIREFOX, browserInstance } from "../utils";
 
 let created = false;
-let browserInstance = IS_FIREFOX ? browser : chrome;
 
 // Try to load the owl panel each 1000 ms in case it (re)appears on the page later on
 const checkInterval = setInterval(createPanelsIfOwl, 1000);

tools/devtools/src/devtools_app/devtools_window/components_tab/component_search_bar/component_search_bar.xml

@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <templates xml:space="preserve">
   <t t-name="devtools.ComponentSearchBar" owl="1">
-    <div class="pointer-icon ms-1 px-2 py-1" t-on-click.stop='() => this.store.toggleSelector()'>
-      <i title="Select an element in the page to inspect the corresponding component" class="fa fa-mouse-pointer" t-attf-style="color: {{store.componentSearch.activeSelector ? 'var(--active-icon)' : 'var(--text-color)'}};"></i>
+    <div class="mouse-icon p-1" t-on-click.stop='() => this.store.toggleSelector()'>
+      <i title="Select an element in the page to inspect the corresponding component" class="fa fa-fw fa-mouse-pointer" t-attf-style="color: {{store.componentSearch.activeSelector ? 'var(--active-icon)' : 'var(--text-color)'}};"></i>
     </div>
     <div class="icons-separator"/>
     <div class="d-flex align-items-center ms-2 flex-grow-1">

tools/devtools/src/devtools_app/devtools_window/components_tab/components_tab.js

@@ -15,6 +15,7 @@ export class ComponentsTab extends Component {
     this.store = useStore();
     this.flushRendersTimeout = false;
     useExternalListener(document, "keydown", this.onKeyboardEvent);
+    useExternalListener(window, "resize", this.onWindowResize);
 
     onWillUnmount(() => {
       window.removeEventListener("mousemove", this.onMouseMove);
@@ -53,9 +54,11 @@ export class ComponentsTab extends Component {
 
   // Adjust the position of the split between the left and right right window of the components tab
   onMouseMove = (event) => {
+    const minWidth = (147 / window.innerWidth) * 100;
+    const maxWidth = 100 - (100 / window.innerWidth) * 100;
     this.store.splitPosition = Math.max(
-      Math.min((event.clientX / window.innerWidth) * 100, 85),
-      15
+      Math.min((event.clientX / window.innerWidth) * 100, maxWidth),
+      minWidth
     );
   };
 
@@ -64,4 +67,11 @@ export class ComponentsTab extends Component {
     window.removeEventListener("mousemove", this.onMouseMove);
     window.removeEventListener("mouseup", this.onMouseUp);
   };
+
+  onWindowResize = () => {
+    const minWidth = (147 / window.innerWidth) * 100;
+    if (minWidth <= 100) {
+      this.store.splitPosition = Math.max(this.store.splitPosition, minWidth);
+    }
+  };
 }

tools/devtools/src/devtools_app/devtools_window/components_tab/details_window/object_tree_element/object_tree_element.xml

@@ -2,8 +2,8 @@
 <templates xml:space="preserve">
   <t t-name="devtools.ObjectTreeElement" owl="1">
     <div class="m-0 p-0 text-nowrap w-100 object-line"
-      t-att-class="props.class"
-      t-on-click.stop="() => this.store.toggleObjectTreeElementsDisplay(this.props.object)" 
+      t-att-class="props.class + (props.object.hasChildren ? ' bg-feedback' : '')"
+      t-on-click.stop="() => this.store.toggleObjectTreeElementsDisplay(this.props.object)"
       t-on-contextmenu.prevent="openMenu" 
     >
       <div t-attf-style="padding-left: {{objectPadding}}rem">

tools/devtools/src/devtools_app/devtools_window/components_tab/tree_element/tree_element.js

@@ -1,11 +1,9 @@
 /** @odoo-module **/
 
-import { isElementInCenterViewport, minimizeKey, IS_FIREFOX } from "../../../../utils";
+import { isElementInCenterViewport, minimizeKey, browserInstance } from "../../../../utils";
 import { useStore } from "../../../store/store";
 import { HighlightText } from "./highlight_text/highlight_text";
 
-const browserInstance = IS_FIREFOX ? browser : chrome;
-
 const { Component, useRef, useState, useEffect, onMounted } = owl;
 
 export class TreeElement extends Component {

tools/devtools/src/devtools_app/devtools_window/devtools_window.xml

@@ -16,9 +16,9 @@
               <option t-att-value="frame"><t t-esc="frame"/></option>
             </t>
           </select>
-          <i class="ms-auto p-1 me-1 lg-icon fa fa-question-circle pointer-icon" title="Open devtools doc" t-on-click.stop="() => this.store.openDocumentation()"></i>
-          <i class="p-1 me-1 lg-icon fa pointer-icon" title="Toggle dark mode" t-att-class="{ 'fa-sun-o': store.settings.darkMode, 'fa-moon-o' : !store.settings.darkMode}" t-on-click.stop="() => this.store.toggleDarkMode()"></i>
-          <i class="p-1 me-1 lg-icon fa fa-repeat pointer-icon" title="Refresh extension" t-on-click.stop="() => this.store.refreshExtension()"></i>
+          <i class="ms-auto p-1 me-1 lg-icon fa fa-question-circle navbar-icon" title="Open devtools doc" t-on-click.stop="() => this.store.openDocumentation()"></i>
+          <i class="p-1 me-1 lg-icon fa navbar-icon" title="Toggle dark mode" t-att-class="{ 'fa-sun-o': store.settings.darkMode, 'fa-moon-o' : !store.settings.darkMode}" t-on-click.stop="() => this.store.toggleDarkMode()"></i>
+          <i class="p-1 me-1 lg-icon fa fa-repeat navbar-icon" title="Refresh extension" t-on-click.stop="() => this.store.refreshExtension()"></i>
         </div>
         <ComponentsTab t-if="store.page === 'ComponentsTab'"/>
         <ProfilerTab t-if="store.page === 'ProfilerTab'"/>

tools/devtools/src/devtools_app/devtools_window/profiler_tab/profiler_tab.xml

@@ -3,20 +3,20 @@
   <t t-name="devtools.ProfilerTab" owl="1">
     <div class="position-relative overflow-hidden d-flex flex-column h-100">
       <div class="panel-top d-flex align-items-center">
-        <i title="Start/Stop Recording" class="fa fa-circle pointer-icon ms-1 p-1" t-attf-style="color: {{store.activeRecorder ? 'var(--active-recorder)' : 'var(--text-color)'}};" t-on-click.stop="() => this.store.toggleRecording()" aria-hidden="true"></i>
-        <i title="Clear events" class="fa fa-ban pointer-icon p-1 px-2" t-on-click.stop="() => this.store.clearEventsConsole()" aria-hidden="true"></i>
-        <div class="icons-separator mx-1"/>
-        <select class="form-select form-select-sm custom-select border-0" t-on-change="selectDisplayMode">
+        <i title="Start/Stop Recording" class="fa fa-circle profiler-icon p-2" t-attf-style="color: {{store.activeRecorder ? 'var(--active-recorder)' : 'var(--text-color)'}};" t-on-click.stop="() => this.store.toggleRecording()" aria-hidden="true"></i>
+        <i title="Clear events" class="fa fa-ban profiler-icon p-2" t-on-click.stop="() => this.store.clearEventsConsole()" aria-hidden="true"></i>
+        <div class="icons-separator"/>
+        <select class="form-select form-select-sm custom-select pointer-icon border-0" t-on-change="selectDisplayMode">
           <option t-att-selected="store.eventsTreeView" value="Tree">Tree view</option>
           <option t-att-selected="!store.eventsTreeView" value="List">Events log</option>
         </select>
-        <i title="Collapse All" type="button" class="fa fa-list me-2" t-on-click="() => this.store.collapseAll()" t-attf-style="{{store.eventsTreeView ? '' : 'visibility: hidden;'}}"></i>
+        <i title="Collapse All" class="fa fa-list p-2 profiler-icon" t-on-click="() => this.store.collapseAll()" t-attf-style="{{store.eventsTreeView ? '' : 'display: none;'}}"></i>
         <div class="icons-separator"/>
-        <label class="mx-2 form-check-label pointer-icon" title="Trace renderings in console">
-          <input type="checkbox" class="form-check-input me-1" t-att-checked="store.traceRenderings" t-on-input="() => this.store.toggleTracing()"/> Trace Renderings
+        <label class="p-1 mx-1 form-check-label pointer-icon" title="Trace renderings in console">
+          <input type="checkbox" class="form-check-input me-1 pointer-icon" t-att-checked="store.traceRenderings" t-on-input="() => this.store.toggleTracing()"/> Trace Renderings
         </label>
-        <label class="mx-2 form-check-label pointer-icon" title="Trace subscriptions in console (warning: it is VERY verbose)">
-          <input type="checkbox" class="form-check-input me-1" t-att-checked="store.traceSubscriptions" t-on-input="() => this.store.toggleSubscriptionTracing()"/> Trace Subscriptions
+        <label class="p-1 mx-1 form-check-label pointer-icon" title="Trace subscriptions in console (warning: it is VERY verbose)">
+          <input type="checkbox" class="form-check-input me-1 pointer-icon" t-att-checked="store.traceSubscriptions" t-on-input="() => this.store.toggleSubscriptionTracing()"/> Trace Subscriptions
         </label>
         <!-- <EventSearchBar/> -->
       </div>

tools/devtools/src/devtools_app/store/store.js

@@ -1,9 +1,7 @@
 const { reactive, useState, toRaw } = owl;
-import { fuzzySearch, IS_FIREFOX, getActiveTabURL } from "../../utils";
+import { fuzzySearch, IS_FIREFOX, getActiveTabURL, browserInstance } from "../../utils";
 import globalHook from "../../page_scripts/owl_devtools_global_hook";
 
-const browserInstance = IS_FIREFOX ? browser : chrome;
-
 // Main store which contains all states that needs to be maintained throughout all components in the devtools app
 export const store = reactive({
   devtoolsId: 0,
@@ -115,6 +113,9 @@ export const store = reactive({
     }
     keepEnvLit(details);
     this.activeComponent = details;
+    if (this.componentSearch.search.length) {
+      this.updateSearch(this.componentSearch.search);
+    }
   },
 
   // Select a component by retrieving its details from the page based on its path
@@ -146,6 +147,7 @@ export const store = reactive({
     }
     component.selected = true;
     highlightChildren(component);
+    this.highlightComponent(path);
     const details = await evalFunctionInWindow(
       "getComponentDetails",
       [component.path],
@@ -346,7 +348,7 @@ export const store = reactive({
 
   // Expand the children of the input object property and load it from page if necessary
   async toggleObjectTreeElementsDisplay(obj) {
-    if (!obj.hasChildren) {
+    if (!obj.hasChildren || window.getSelection().toString().length) {
       return;
     }
     // Since it is sometimes impossible (and always ineffective) to load all descendants of a property
@@ -939,10 +941,9 @@ function arraysEqual(arr1, arr2) {
 
 async function getTabURL() {
   if (IS_FIREFOX) {
-    // This happens in firefox when the method is called inside devtools so we ask the background to execute it instead
-    browserInstance.runtime.sendMessage({ type: "getActiveTabURL" }).then((response) => {
-      return response.result;
-    });
+    // It is not possible to run getActiveTabURL inside the devtools when using firefox so we ask the background to execute it instead
+    const response = await browserInstance.runtime.sendMessage({ type: "getActiveTabURL" });
+    return response.result;
   } else {
     return await getActiveTabURL();
   }

tools/devtools/src/main.css

@@ -26,6 +26,8 @@
   --text-selected: white;
   --menu-highlight-bg: rgb(201, 201, 201);
   --version-bg: teal;
+  --hover-bg: #ebebeb;
+  --navbar-hover-bg: #d3d3d3;
   /* to change the color here, put it in stroke='%23[color in hexadecimal]' */
   --select-icon: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23444444' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
 }
@@ -52,6 +54,8 @@
   --text-selected: #c9c9c9;
   --menu-highlight-bg: rgb(65, 65, 65);
   --version-bg: #805900ad;
+  --hover-bg: #575757;
+  --navbar-hover-bg: #6b6b6b;
   color-scheme: dark;
   /* to change the color here, put it in stroke='%23[color in hexadecimal]' */
   --select-icon: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23c9c9c9' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
@@ -82,6 +86,10 @@
   color: var(--text-color) !important;
 }
 
+.form-check-label {
+  user-select: none;
+}
+
 .navbar-btn {
   height: 23px;
   padding: 0.5rem;
@@ -244,7 +252,7 @@
 .search-input {
   background-color: var(--background-color);
   color: var(--text-color);
-  padding: 0.4rem 0rem;
+  padding: 0.37rem 0rem;
 }
 
 .search-icon {
@@ -255,6 +263,35 @@
 .utility-icon {
   cursor: pointer;
   font-size: 1.2em;
+  border-radius: 35%;
+}
+
+.mouse-icon {
+  border-radius: 35%;
+  cursor: pointer;
+  padding-left: 0.4rem !important;
+}
+
+.profiler-icon {
+  border-radius: 35%;
+  cursor: pointer;
+}
+
+.utility-icon:hover, .mouse-icon:hover, .profiler-icon:hover, .bg-feedback:hover {
+  background-color: var(--hover-bg);
+}
+
+.navbar-icon {
+  border-radius: 35%;
+  cursor: pointer;
+}
+
+.navbar-icon:hover {
+  background-color: var(--navbar-hover-bg);
+}
+
+.bg-feedback {
+  border-radius: 5%;
 }
 
 .lg-icon {
@@ -281,7 +318,7 @@
   color: var(--text-color);
   background-color: var(--background-color);
   border: 1px solid gray;
-  z-index: 1;
+  z-index: 2;
   box-shadow: 1px 2px 5px #888;
   font-family: var(--bs-font-sans-serif);
 }

tools/devtools/src/page_scripts/owl_devtools_global_hook.js

@@ -49,6 +49,7 @@
       this.traceRenderings = false;
       this.traceSubscriptions = false;
       this.requestedFrame = false;
+      this.enabledSelector = false;
       this.eventsBatch = [];
       // Object which defines how different types of data should be displayed when passed to the devtools
       this.serializer = {
@@ -175,6 +176,7 @@
 
     initDevtools(frame = "top") {
       if (!this.devtoolsInit) {
+        document.addEventListener("mouseover", this.HTMLSelector, { capture: true });
         this.frame = frame;
         const self = this;
         // Flush the events batcher when a root render is completed
@@ -606,28 +608,33 @@
     // Identify the hovered component based on the corresponding DOM element and send the Select message
     // when the target changes
     HTMLSelector = (ev) => {
-      const target = ev.target;
-      if (!this.currentSelectedElement || !target.isEqualNode(this.currentSelectedElement)) {
-        const path = this.getElementPath(target);
-        this.highlightComponent(path);
-        this.currentSelectedElement = target;
-        window.top.postMessage({
-          source: "owl-devtools",
-          type: "SelectElement",
-          data: path,
-        });
+      if (this.enabledSelector) {
+        const target = ev.target;
+        if (!this.currentSelectedElement || !target.isEqualNode(this.currentSelectedElement)) {
+          const path = this.getElementPath(target);
+          this.highlightComponent(path);
+          this.currentSelectedElement = target;
+          window.top.postMessage({
+            source: "owl-devtools",
+            type: "SelectElement",
+            data: path,
+          });
+        }
+      } else {
+        this.removeHighlights();
       }
     };
 
     // Activate the HTML selector tool
     enableHTMLSelector() {
-      document.addEventListener("mouseover", this.HTMLSelector, { capture: true });
+      this.enabledSelector = true;
       document.addEventListener("click", this.disableHTMLSelector, { capture: true });
-      document.addEventListener("mouseout", this.removeHighlights, { capture: true });
+      document.addEventListener("scroll", this.removeHighlights, { capture: true });
     }
 
     // Diasble the HTML selector tool
     disableHTMLSelector = (ev = undefined) => {
+      this.enabledSelector = false;
       if (ev) {
         if (!ev.isTrusted) {
           return;
@@ -636,9 +643,8 @@
         ev.preventDefault();
       }
       this.removeHighlights();
-      document.removeEventListener("mouseover", this.HTMLSelector, { capture: true });
       document.removeEventListener("click", this.disableHTMLSelector, { capture: true });
-      document.removeEventListener("mouseout", this.removeHighlights, { capture: true });
+      document.removeEventListener("scroll", this.removeHighlights, { capture: true });
       window.top.postMessage({
         source: "owl-devtools",
         type: "StopSelector",
@@ -748,7 +754,7 @@
           child.contentType = "object";
           child.content = this.serializer.serializeItem(Object.getPrototypeOf(parentObj), true);
           child.hasChildren = true;
-          if (!oldTree && type === "env") {
+          if (!oldTree && type === "env" && Object.getPrototypeOf(parentObj) !== Object.prototype) {
             child.toggled = true;
           }
           break;
@@ -1396,7 +1402,7 @@
         return this.getDOMElementsRecursive(node.content);
       }
       if (node.hasOwnProperty("el")) {
-        if (node.el instanceof HTMLElement || node.el instanceof Text) {
+        if (node.el instanceof Element || node.el instanceof Text) {
           return [node.el];
         }
       }
@@ -1415,7 +1421,7 @@
         }
       }
       if (node.hasOwnProperty("parentEl")) {
-        if (node.parentEl instanceof HTMLElement) {
+        if (node.parentEl instanceof Element) {
           return [node.parentEl];
         }
       }

tools/devtools/src/utils.js

@@ -1,6 +1,6 @@
 export const IS_FIREFOX = navigator.userAgent.indexOf("Firefox") !== -1;
 
-const browserInstance = IS_FIREFOX ? browser : chrome;
+export const browserInstance = IS_FIREFOX ? browser : chrome;
 
 export async function getOwlStatus() {
   const response = await browserInstance.runtime.sendMessage({ type: "getOwlStatus" });