# throttleTime

#### signature: `throttleTime(duration: number, scheduler: Scheduler, config: ThrottleConfig): Observable`

## Emit first value then ignore for specified duration

### Examples

**Example 1: Emit first value, ignore for 5s window**

( [StackBlitz](https://stackblitz.com/edit/typescript-en2zqe?file=index.ts\&devtoolsheight=100) )

```js
// RxJS v6+
import { interval } from 'rxjs';
import { throttleTime } from 'rxjs/operators';

// emit value every 1 second
const source = interval(1000);
/*
  emit the first value, then ignore for 5 seconds. repeat...
*/
const example = source.pipe(throttleTime(5000));
// output: 0...6...12
const subscribe = example.subscribe(val => console.log(val));
```

**Example 2: Emit on trailing edge using config**

( [StackBlitz](https://stackblitz.com/edit/typescript-5rwl6i?file=index.ts\&devtoolsheight=100) )

```js
// RxJS v6+
import { interval, asyncScheduler } from 'rxjs';
import { throttleTime } from 'rxjs/operators';

const source = interval(1000);
/*
  emit the first value, then ignore for 5 seconds. repeat...
*/
const example = source.pipe(
  throttleTime(5000, asyncScheduler, { trailing: true })
);
// output: 5...11...17
const subscribe = example.subscribe(val => console.log(val));
```

### Related Recipes

* [Horizontal Scroll Indicator](/learn-rxjs/recipes/horizontal-scroll-indicator.md)
* [Lockscreen](/learn-rxjs/recipes/lockscreen.md)

### Additional Resources

* [throttleTime](https://rxjs.dev/api/operators/throttleTime) 📰 - Official docs
* [Filtering operator: throttle and throttleTime](https://egghead.io/lessons/rxjs-filtering-operators-throttle-and-throttletime?course=rxjs-beyond-the-basics-operators-in-depth) 🎥 💵 - André Staltz
* [Time based operators comparison](/learn-rxjs/concepts/time-based-operators-comparison.md)

***

> 📁 Source Code: <https://github.com/ReactiveX/rxjs/blob/master/packages/rxjs/src/internal/operators/throttleTime.ts>


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