angularrxjsobservableangular2-templateangular2-pipe

Accessing result of async pipe in template from component code in Angular 2

In Angular 2 I have a component with a template.

In the component TypeScript code i create a Reactive Extensions Observable (items$) and use it in an ngFor-directive in the template with an async-pipe.

This way I do not have to worry about subscribing and unsubscribing myself.

<div *ngFor="let item of items$ | async"></div>
...
</div>

Now from the component code I would like to access the list of items, but without subscribing to it. Is there a way from the template to hand back a copy of or reference to the items list?

Solution

  • You could just do this in the component:

    items$.pipe(tap(items => this.items = items);

    This way, you don't subscribe to the stream, and can keep using async pipe, but if a new value is emitted it will be saved in items variable.