Answer
Manages the component tree, performs manual change detection, and supports custom bootstrapping.
Quick Answer
ApplicationRef represents the Angular application. tick() manually runs change detection for the whole app (useful when Zone.js is disabled). attachView() adds a HostView (from ComponentRef) to the app's change detection tree. isStable Observable emits when the app has no pending async work (used for server-side rendering to know when to serialize). Rarely used directly in app code.
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SugharaIQ Editorial Team
Verified Answer
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Source: SugharaIQ