# ignoreElements

#### signature: `ignoreElements(): Observable`

## Ignore everything but complete and error.

### Examples

**Example 1: Ignore all elements from source**

( [StackBlitz](https://stackblitz.com/edit/typescript-w6rndwxh?file=index.ts))

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

//emit value every 100ms
const source = interval(100);
//ignore everything but complete
const example = source.pipe(take(5), ignoreElements());
//output: "COMPLETE!"
const subscribe = example.subscribe(
  val => console.log(`NEXT: ${val}`),
  val => console.log(`ERROR: ${val}`),
  () => console.log('COMPLETE!')
);
```

**Example 2: Only displaying error**

( [StackBlitz](https://stackblitz.com/edit/typescript-3yxv9z?file=index.ts\&devtoolsheight=100))

```js
// RxJS v6+
import { interval, throwError, of } from 'rxjs';
import { mergeMap, ignoreElements } from 'rxjs/operators';

//emit value every 100ms
const source = interval(100);
//ignore everything but error
const error = source.pipe(
  mergeMap(val => {
    if (val === 4) {
      return throwError(`ERROR AT ${val}`);
    }
    return of(val);
  }),
  ignoreElements()
);
//output: "ERROR: ERROR AT 4"
const subscribe = error.subscribe(
  val => console.log(`NEXT: ${val}`),
  val => console.log(`ERROR: ${val}`),
  () => console.log('SECOND COMPLETE!')
);
```

### Additional Resources

* [ignoreElements](https://rxjs.dev/api/operators/ignoreElements) 📰 - Official docs

***

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