rxjs-es/src/add/operator/do.ts

Reactive Extensions for modern JavaScript

import { Observable } from '../../Observable';
import { _do, DoSignature } from '../../operator/do';

Observable.prototype.do = _do;
Observable.prototype._do = _do;

declare module '../../Observable' {
  interface Observable<T> {
    do: DoSignature<T>;
    _do: DoSignature<T>;
  }
}