debounceTime

signature: debounceTime(dueTime: number, scheduler: Scheduler): Observable

Discard emitted values that take less than the specified time between output

πŸ’‘ This operator is popular in scenarios such as type-ahead where the rate of user input must be controlled!

​​Ultimate RxJS​​

Examples

Example 1: Debouncing based on time between input

( StackBlitz )

// RxJS v6+
import { fromEvent } from 'rxjs';
import { debounceTime, map } from 'rxjs/operators';
​
// elem ref
const searchBox = document.getElementById('search');
​
// streams
const keyup$ = fromEvent(searchBox, 'keyup');
​
// wait .5s between keyups to emit current value
keyup$
.pipe(
map((i: any) => i.currentTarget.value),
debounceTime(500)
)
.subscribe(console.log);
  • [Save Indicator]('../../recipes/save-indicator.md)

  • ​Type Ahead​

Additional Resources

πŸ“ Source Code: https://github.com/ReactiveX/rxjs/blob/master/src/internal/operators/debounceTime.ts​