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fix(cdk/scrolling): unsubscribe from scrolled stream when viewport is destroyed #27800

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Sep 18, 2023
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fix(cdk/scrolling): unsubscribe from scrolled stream when viewport is destroyed #27800

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4 changes: 4 additions & 0 deletions src/cdk/scrolling/virtual-scroll-viewport.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -229,6 +229,10 @@ export class CdkVirtualScrollViewport extends CdkVirtualScrollable implements On
// there are multiple scroll events in the same frame we only need to recheck
// our layout once.
auditTime(0, SCROLL_SCHEDULER),
// Usually `elementScrolled` is completed when the scrollable is destroyed, but
// that may not be the case if a `CdkVirtualScrollableElement` is used so we have
// to unsubscribe here just in case.
takeUntil(this._destroyed),
)
.subscribe(() => this._scrollStrategy.onContentScrolled());

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