kefir/src/one-source/before-end.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'

const mixin = {
  _init({fn}) {
    this._fn = fn
  },

  _free() {
    this._fn = null
  },

  _handleEnd() {
    const fn = this._fn
    this._emitValue(fn())
    this._emitEnd()
  },
}

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

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