ngIf="returnsPromise() | async" goes to infinite loop

[mohsen1]

I was experimenting with AsyncPipe that this happened. If a method is returning a promise and you pipe it to AsyncPipe it will go to infinite loop and crashes the browser.

Sorry for screenshot, tab was frozen and I couldn't copy the code

[robwormald]

this is expected behavior, because each time the method is called, you're returning a new instance of the promise, which when resolved, triggers change detection, which retrieves a new promise, which triggers change detection....

You should a) generally avoid calling methods from the view and b) assign a promise to a property

[danrasmuson]

@robwormald The example given in the docs describes piping a promise to AsyncPipe.

Should those docs be updated?

Source Docs

angular.io

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