Angular: ngIf="returnsPromise() | async" goes to infinite loop
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_
mohsen1
All 3 comments
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
robwormald
on 27 Jan 2016
@robwormald The example given in the docs describes piping a promise to AsyncPipe.
Should those docs be updated?
danielrasmuson
on 25 Feb 2016
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on 8 Sep 2019
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Most helpful comment
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