windowToggle

signature: windowToggle(openings: Observable, closingSelector: function(value): Observable): Observable

Collect and emit observable of values from source between opening and closing emission.

Ultimate RxJS

Examples

Example 1: Toggle window at increasing interval

( StackBlitz | jsBin | jsFiddle )

// RxJS v6+
import { timer, interval } from 'rxjs';
import { tap, windowToggle, mergeAll } from 'rxjs/operators';
//emit immediately then every 1s
const source = timer(0, 1000);
//toggle window on every 5
const toggle = interval(5000);
const example = source.pipe(
//turn window on every 5s
windowToggle(toggle, val => interval(val * 1000)),
tap(_ => console.log('NEW WINDOW!'))
);
const subscribeTwo = example
.pipe(
//window emits nested observable
mergeAll()
/*
output:
"NEW WINDOW!"
5
"NEW WINDOW!"
10
11
"NEW WINDOW!"
15
16
"NEW WINDOW!"
20
21
22
*/
)
.subscribe(val => console.log(val));

Additional Resources

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