Rx .log monkey

monkey.js

Rx.Observable.prototype.log = function(prefix) {
  return process.env.NODE_ENV !== "development" ? this : this
    .doOnCompleted(() => console.log(prefix, "<completed>"))    // eslint-disable-line
    .do(x => console.log(prefix, x))                            // eslint-disable-line
}

// const obs = Rx.Observable.fromEvent(text, "input")
//   .log("InputEvent:")
//   .map(e => e.target.value)
//   .filter(t => !!t)