JavaScript Array.prototype.forEach Polyfill

forEach.js

/*
 * forEach Polyfill
 *
 * 2015-12-27
 *
 * By Feifei Hang, http://feifeihang.info
 * Public Domain.
 * NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
 */
'use strict';
(function () {
  if (!Array.prototype.forEach) {
    Array.prototype.forEach = function forEach (callback, thisArg) {
      if (typeof callback !== 'function') {
        throw new TypeError(callback + ' is not a function');
      }
      var array = this;
      thisArg = thisArg || this;
      for (var i = 0, l = array.length; i !== l; ++i) {
        callback.call(thisArg, array[i], i, array);
      }
    };
  }
})();