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throw

signature: throw(error: any, scheduler: Scheduler): Observable

Emit error on subscription.

Examples

Example 1: Throw error on subscription
// RxJS v6+
import { throwError } from 'rxjs';
//emits an error with specified value on subscription
const source = throwError('This is an error!');
//output: 'Error: This is an error!'
const subscribe = source.subscribe({
next: val => console.log(val),
complete: () => console.log('Complete!'),
error: val => console.log(`Error: ${val}`)
});

Additional Resources

Last modified 2yr ago