async pipe angular 2 ngfor observable

Angular 2 Async Pipe with Ngfor Observable

What is async pipe?

The async pipe subscribes to an Observable and returns the latest changed value. When a new value is changed, the async pipe marks the component to be checked for changes. When the component gets destroyed the async pipe unsubscribes automatically to avoid potential memory leaks.

How to use async pipe in Angular 2?
observable_expression | async

  selector: 'async-observable-pipe',
  template: '<div><code>observable|async</code>: Time: {{ time | async }}</div>'

export class AsyncObservablePipeComponent {
  time = new Observable<string>((observer: Subscriber<string>) => {
    setInterval(() => Date().toString()), 1000);

The async pipe with ngFor in Angular 2,

*ngFor="#obj of (myAsyncObject | async)?.prop1?.prop2"


I hope you are enjoying with this post! Please share with you friends!! Thank you!!!

Hey! I'm Anil Singh. I author this blog. I'm Active Blogger, Programmer. I love learning new technologies, programming, blogging and participating the forum discussions more...
My Blogs - and
My Books - Interview Questions and Answers Books- Get Your Book in 15+ Digital Stores Worldwide..

You Might Also Like Powered by Blogger.
ASK Questions