Simply shims array.forEach for projects that utilize it, such as the es6-promise-shim

array.forEach-shim.js

/*!
* This is a copy of the shim provided by MDN
* https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach
*/
(function () {

	// Production steps of ECMA-262, Edition 5, 15.4.4.18
	// Reference: http://es5.github.io/#x15.4.4.18
	if (!Array.prototype.forEach) {

		Array.prototype.forEach = function (callback, thisArg) {

			var T, k;

			if (this == null) {
				throw new TypeError(' this is null or not defined');
			}

			// 1. Let O be the result of calling ToObject passing the |this| value as the argument.
			var O = Object(this);

			// 2. Let lenValue be the result of calling the Get internal method of O with the argument "length".
			// 3. Let len be ToUint32(lenValue).
			var len = O.length >>> 0;

			// 4. If IsCallable(callback) is false, throw a TypeError exception.
			// See: http://es5.github.com/#x9.11
			if (typeof callback !== "function") {
				throw new TypeError(callback + ' is not a function');
			}

			// 5. If thisArg was supplied, let T be thisArg; else let T be undefined.
			if (arguments.length > 1) {
				T = thisArg;
			}

			// 6. Let k be 0
			k = 0;

			// 7. Repeat, while k < len
			while (k < len) {

				var kValue;

				// a. Let Pk be ToString(k).
				//   This is implicit for LHS operands of the in operator
				// b. Let kPresent be the result of calling the HasProperty internal method of O with argument Pk.
				//   This step can be combined with c
				// c. If kPresent is true, then
				if (k in O) {

					// i. Let kValue be the result of calling the Get internal method of O with argument Pk.
					kValue = O[k];

					// ii. Call the Call internal method of callback with T as the this value and
					// argument list containing kValue, k, and O.
					callback.call(T, kValue, k, O);
				}
				// d. Increase k by 1.
				k++;
			}
			// 8. return undefined
		};
	}

})();

array.forEach-shim.min.js

(function(){Array.prototype.forEach||(Array.prototype.forEach=function(n,t){var u,i,r,f,e;if(this==null)throw new TypeError(" this is null or not defined");if(r=Object(this),f=r.length>>>0,typeof n!="function")throw new TypeError(n+" is not a function");for(arguments.length>1&&(u=t),i=0;i<f;)i in r&&(e=r[i],n.call(u,e,i,r)),i++})})();

package.json

{
  "name": "array-foreach-shim",
  "version": "1.0.0",
  "main": "array.forEach-shim.min.js"
}