endWith

signature: endWith(an: Values): Observable
Emit given value(s) on completion.
💡 If you want to start with a value instead, check out startWith!
💡 If you want to perform an action on completion, but do not want to emit a value, check out finalize!
 ​​​
Examples
Example 1: Basic endWith example
( StackBlitz )
// RxJS v6+
import { endWith } from 'rxjs/operators';
import { of } from 'rxjs';
​
const source$ = of('Hello', 'Friend', 'Goodbye');
​
source$
  // emit on completion
  .pipe(endWith('Friend'))
  // 'Hello', 'Friend', 'Goodbye', 'Friend'
  .subscribe(console.log(val));
Example 2: endWith multiple values
( StackBlitz )
// RxJS v6+
import { endWith } from 'rxjs/operators';
import { of } from 'rxjs';
​
const source$ = of('Hello', 'Friend');
​
source$
  // emit on completion
  .pipe(endWith('Goodbye', 'Friend'))
  // 'Hello', 'Friend', 'Goodbye', 'Friend'
  .subscribe(console.log(val));
Example 3: Comparison to finalize
( StackBlitz )
// RxJS v6+
import { endWith, finalize } from 'rxjs/operators';
import { of } from 'rxjs';
​
const source$ = of('Hello', 'Friend');
​
source$
  // emit on completion
  .pipe(
    endWith('Goodbye', 'Friend'),
    // this function is invoked when unsubscribe methods are called
    finalize(() => console.log('Finally'))
  )
  // 'Hello', 'Friend', 'Goodbye', 'Friend'
  .subscribe(val => console.log(val));
// 'Finally'
Additional Resources
​endWith 📰 - Official docs
📁 Source Code: https://github.com/ReactiveX/rxjs/blob/master/src/internal/operators/endWith.ts​
concatAll
forkJoin
Last updated 1 week ago