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Custom Element output events not firing during initialization lifecycle hooks #36141
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Thx for reporting this, @antch 👍 From a quick look, this happens, because I need to take a proper to determine whether we can fix this without a breaking change or a change to the public API. |
…tialization Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Ensuring `NgElementImpl` subscribes to `NgElementStrategy#events` before calling `NgElementStrategy#connect()` (which initializes the component instance). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 Fixes angular#36141
Looks good 👍 |
…tialization Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Ensuring `NgElementImpl` subscribes to `NgElementStrategy#events` before calling `NgElementStrategy#connect()` (which initializes the component instance). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 Fixes angular#36141
…tialization Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Ensuring `NgElementImpl` subscribes to `NgElementStrategy#events` before calling `NgElementStrategy#connect()` (which initializes the component instance). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 Fixes angular#36141
…tialization Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Ensuring `NgElementImpl` subscribes to `NgElementStrategy#events` before calling `NgElementStrategy#connect()` (which initializes the component instance). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 Fixes angular#36141
…tialization Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Ensuring `NgElementImpl` subscribes to `NgElementStrategy#events` before calling `NgElementStrategy#connect()` (which initializes the component instance). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 Fixes angular#36141
…tialization Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Ensuring `NgElementImpl` subscribes to `NgElementStrategy#events` before calling `NgElementStrategy#connect()` (which initializes the component instance). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 Fixes angular#36141
…tialization Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Ensuring `NgElementImpl` subscribes to `NgElementStrategy#events` before calling `NgElementStrategy#connect()` (which initializes the component instance). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 Fixes angular#36141
…tialization Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Ensuring `NgElementImpl` subscribes to `NgElementStrategy#events` before calling `NgElementStrategy#connect()` (which initializes the component instance). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 Fixes angular#36141
…tialization Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Ensuring `NgElementImpl` subscribes to `NgElementStrategy#events` before calling `NgElementStrategy#connect()` (which initializes the component instance). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 Fixes angular#36141
…tialization Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Ensuring `NgElementImpl` subscribes to `NgElementStrategy#events` before calling `NgElementStrategy#connect()` (which initializes the component instance). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 Fixes angular#36141
…tialization Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Ensuring `NgElementImpl` subscribes to `NgElementStrategy#events` before calling `NgElementStrategy#connect()` (which initializes the component instance). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 Fixes angular#36141
…tialization Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Ensuring `NgElementImpl` subscribes to `NgElementStrategy#events` before calling `NgElementStrategy#connect()` (which initializes the component instance). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 Fixes angular#36141
…tialization Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Ensuring `NgElementImpl` subscribes to `NgElementStrategy#events` before calling `NgElementStrategy#connect()` (which initializes the component instance). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 Fixes angular#36141
…tialization (#36161) Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Ensuring `NgElementImpl` subscribes to `NgElementStrategy#events` before calling `NgElementStrategy#connect()` (which initializes the component instance). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 Fixes #36141 PR Close #36161
FYI, we had to revert the fix, because it turned out to be a breaking change. More specifically, if someone was using their own Therefore this fix has to wait for v11, unless we can fix it in a non-breaking way (which I think is possible). I will update with more info in the coming days. |
Thanks for your continued work on these Elements issues @gkalpak! |
…tialization Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Changing `NgElementImpl` to subscribe to `NgElementStrategy#events` (if available) before calling `NgElementStrategy#connect()` (which initializes the component instance) if available. 3. Falling back to the old behavior (subscribing to `events` after calling `connect()` for strategies that do not initialize `events` before their `connect()` is run). NOTE: By falling back to the old behavior when `NgElementStrategy#events` is not initialized before calling `NgElementStrategy#connect()`, we avoid breaking existing custom `NgElementStrategy` implementations (with @remackgeek's [ElementZoneStrategy][4] being a commonly used example). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 [4]: https://github.com/remackgeek/elements-zone-strategy/blob/f1b6699495a8c0909dbbfbdca12770ecca843e15/projects/elements-zone-strategy/src/lib/element-zone-strategy.ts Fixes angular#36141
…tialization Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Changing `NgElementImpl` to subscribe to `NgElementStrategy#events` (if available) before calling `NgElementStrategy#connect()` (which initializes the component instance) if available. 3. Falling back to the old behavior (subscribing to `events` after calling `connect()` for strategies that do not initialize `events` before their `connect()` is run). NOTE: By falling back to the old behavior when `NgElementStrategy#events` is not initialized before calling `NgElementStrategy#connect()`, we avoid breaking existing custom `NgElementStrategy` implementations (with @remackgeek's [ElementZoneStrategy][4] being a commonly used example). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 [4]: https://github.com/remackgeek/elements-zone-strategy/blob/f1b6699495a8c0909dbbfbdca12770ecca843e15/projects/elements-zone-strategy/src/lib/element-zone-strategy.ts Fixes angular#36141
For reference: #37570 |
…tialization (angular#36161) Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Ensuring `NgElementImpl` subscribes to `NgElementStrategy#events` before calling `NgElementStrategy#connect()` (which initializes the component instance). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 Fixes angular#36141 PR Close angular#36161
…tialization (#37570) Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Changing `NgElementImpl` to subscribe to `NgElementStrategy#events` (if available) before calling `NgElementStrategy#connect()` (which initializes the component instance) if available. 3. Falling back to the old behavior (subscribing to `events` after calling `connect()` for strategies that do not initialize `events` before their `connect()` is run). NOTE: By falling back to the old behavior when `NgElementStrategy#events` is not initialized before calling `NgElementStrategy#connect()`, we avoid breaking existing custom `NgElementStrategy` implementations (with @remackgeek's [ElementZoneStrategy][4] being a commonly used example). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 [4]: https://github.com/remackgeek/elements-zone-strategy/blob/f1b6699495a8c0909dbbfbdca12770ecca843e15/projects/elements-zone-strategy/src/lib/element-zone-strategy.ts Fixes #36141 PR Close #37570
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…tialization (angular#36161) Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Ensuring `NgElementImpl` subscribes to `NgElementStrategy#events` before calling `NgElementStrategy#connect()` (which initializes the component instance). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 Fixes angular#36141 PR Close angular#36161
…tialization (angular#37570) Previously, event listeners for component output events attached on an Angular custom element before inserting it into the DOM (i.e. before instantiating the underlying component) didn't fire for events emitted during initialization lifecycle hooks, such as `ngAfterContentInit`, `ngAfterViewInit`, `ngOnChanges` (initial call) and `ngOnInit`. The reason was that `NgElementImpl` [subscribed to events][1] _after_ calling [ngElementStrategy#connect()][2], which is where the [initial change detection][3] takes place (running the initialization lifecycle hooks). This commit fixes this by: 1. Ensuring `ComponentNgElementStrategy#events` is defined and available for subscribing to, even before instantiating the component. 2. Changing `NgElementImpl` to subscribe to `NgElementStrategy#events` (if available) before calling `NgElementStrategy#connect()` (which initializes the component instance) if available. 3. Falling back to the old behavior (subscribing to `events` after calling `connect()` for strategies that do not initialize `events` before their `connect()` is run). NOTE: By falling back to the old behavior when `NgElementStrategy#events` is not initialized before calling `NgElementStrategy#connect()`, we avoid breaking existing custom `NgElementStrategy` implementations (with @remackgeek's [ElementZoneStrategy][4] being a commonly used example). Jira issue: [FW-2010](https://angular-team.atlassian.net/browse/FW-2010) [1]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L167-L170 [2]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/create-custom-element.ts#L164 [3]: https://github.com/angular/angular/blob/c0143cb2abdd172de1b95fd1d2c4cfc738640e28/packages/elements/src/component-factory-strategy.ts#L158 [4]: https://github.com/remackgeek/elements-zone-strategy/blob/f1b6699495a8c0909dbbfbdca12770ecca843e15/projects/elements-zone-strategy/src/lib/element-zone-strategy.ts Fixes angular#36141 PR Close angular#37570
🐞 bug report
Affected Package
The issue is caused by package @angular/elements
Is this a regression?
No
Description
Event listeners on Custom Element component outputs don't fire during
ngOnChanges
(initial call),ngOnInit
,ngAfterViewInit
, orngAfterContentInit
.🔬 Minimal Reproduction
https://github.com/antch/angular-elements-lifecycle-hooks
For both the Custom and Native element there is a list which should be appended with the fired events. For the native element, we can see the callback fires during initialization of the component, but this doesn't happen for the Custom Element.
You can look in the console to see the execution of the lifecycle hooks.
The reproduction uses artifacts from a CI build associated with #36114.
🌍 Your Environment
Angular Version:
Warning: This is a build off of CI assets, so this isn't entirely accurate.
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