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javascript 解决IE8不支持filter的方法

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Release: 2016-06-01 09:54:27
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filter 被添加到 ECMA-262 标准第 5 版中,因此在某些实现环境中不被支持。可以把下面的代码插入到脚本的开头来解决此问题,该代码允许在那些没有原生支持 filter 的实现环境中使用它。

<code class="language-javascript">if (!Array.prototype.filter)
{
  Array.prototype.filter = function(fun /*, thisArg */)
  {
    "use strict";

    if (this === void 0 || this === null)
      throw new TypeError();

    var t = Object(this);
    var len = t.length >>> 0;
    if (typeof fun !== "function")
      throw new TypeError();

    var res = [];
    var thisArg = arguments.length >= 2 ? arguments[1] : void 0;
    for (var i = 0; i </code>
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