mapTo

signature: mapTo(value: any): Observable

Example 1: Map every emission to string

Example 2: Mapping clicks to string

import { fromEvent } from 'rxjs/observable/fromEvent';
//emit every click on document
//map all emissions to one value
const subscribe = example.subscribe(val => console.log(val));

• mapTo
  - Official docs
• 
  - John Linquist
• Transformation operator: map and mapTo
  - André Staltz