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fix(core): inject APP_ID before injector is destroyed #61885

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fix(core): inject APP_ID before injector is destroyed #61885

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fix(core): inject APP_ID before injector is destroyed 
In this commit, we request `APP_ID` outside the `onDestroy` callback because the injector might already be in a destroyed state when the callback runs.
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@arturovt
arturovt committed Jun 5, 2025
commit 6fead75a29f03fd9a48f93684b5082802fb26fda
2 changes: 1 addition & 1 deletion packages/core/src/hydration/event_replay.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -145,11 +145,11 @@ export function withEventReplay(): Provider[] {

appsWithEventReplay.add(appRef);

const appId = injector.get(APP_ID);
appRef.onDestroy(() => {
appsWithEventReplay.delete(appRef);
// Ensure that we're always safe calling this in the browser.
if (typeof ngServerMode !== 'undefined' && !ngServerMode) {
const appId = injector.get(APP_ID);
// `_ejsa` should be deleted when the app is destroyed, ensuring that
// no elements are still captured in the global list and are not prevented
// from being garbage collected.
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9 changes: 9 additions & 0 deletions packages/platform-server/test/event_replay_spec.ts
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Expand Up @@ -207,7 +207,16 @@ describe('event replay', () => {
appRef.tick();
const appId = appRef.injector.get(APP_ID);

// Important: This is done intentionally because `ApplicationRef` registers
// `onDestroy` callbacks, and we want to ensure that they execute successfully
// without resulting in any errors. This is necessary because the bodies of
// these `onDestroy` callbacks use the `ngServerMode` variable.
// Prior to setting this flag, the unit test was throwing a "destroyed injector"
// error — but we weren't capturing it because we hadn't explicitly set the flag to false.
globalThis['ngServerMode'] = false;
appRef.destroy();
globalThis['ngServerMode'] = undefined;

// This ensure that `_ejsas` for the current application is cleaned up
// once the application is destroyed.
expect(window._ejsas![appId]).toBeUndefined();
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