throw

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

Emit error on subscription.

Examples

Example 1: Throw error on subscription

( jsBin | jsFiddle )

//emits an error with specified value on subscription
const source = Rx.Observable.throw('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


:file_folder: Source Code: https://github.com/ReactiveX/rxjs/blob/master/src/observable/ErrorObservable.ts

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