kefir/src/one-source/with-handler.js

Reactive Programming library for JavaScript inspired by Bacon.js and RxJS with focus on high performance and low memory usage

import {createStream, createProperty} from '../patterns/one-source'
import emitter from '../emitter'

const mixin = {
  _init({fn}) {
    this._handler = fn
    this._emitter = emitter(this)
  },

  _free() {
    this._handler = null
    this._emitter = null
  },

  _handleAny(event) {
    this._handler(this._emitter, event)
  },
}

const S = createStream('withHandler', mixin)
const P = createProperty('withHandler', mixin)

export default function withHandler(obs, fn) {
  return new (obs._ofSameType(S, P))(obs, {fn})
}