asyncsubject.md

AsyncSubject

A Subject that only emits its last value upon completion

Examples

Example 1: simple AsyncSubject

( Stackblitz )

// RxJS v6+
import { AsyncSubject } from 'rxjs';

const sub = new AsyncSubject();

sub.subscribe(console.log);

sub.next(123); //nothing logged

sub.subscribe(console.log);

sub.next(456); //nothing logged
sub.complete(); //456, 456 logged by both subscribers

Additional Resources

• AsyncSubject 📰 - Official docs

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📁 Source Code: https://github.com/ReactiveX/rxjs/blob/master/src/internal/AsyncSubject.ts