低版本浏览器不支持Array的forEach,解决办法
define(function(require,exports,module){ /** * Invokes given callback function for each element of an array. * ECMAScript 5 Reference: 15.4.4.18 * @param {function} callback a callback * @throws {TypeError} when callback is not callable object * @example [1,2,3].forEach(function(el){ console.log(el); }); */ 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"); } var O = Object(this); var len = O.length >>> 0; if ({}.toString.call(callback) != "[object Function]"){ throw new TypeError(callback + " is not a function"); } if (thisArg){ T = thisArg; } k = 0; while(k < len){ var kValue; if (k in O){ kValue = O[k]; callback.call(T, kValue, k, O); } k++; } }; }; });