Polyfill. Добавление forEach к NodeList (для IE 11)

NodeList.forEach.js

if (window.NodeList && !NodeList.prototype.forEach) {
  NodeList.prototype.forEach = function (callback, thisArg) {
    thisArg = thisArg || window
    for (var i = 0; i < this.length; i++) {
      callback.call(thisArg, this[i], i, this)
    }
  }
}

// Или

if (window.NodeList && !NodeList.prototype.forEach) {
  NodeList.prototype.forEach = Array.prototype.forEach
}