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silianlinyi/hasStrictMode.js

Last active December 24, 2015 11:49
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在严格模式中，调用的函数（不是方法）中的一个this值是undefined。（在非严格模式中，调用的函数中的this值总是全局对象）。可以利用这种特性来 判断JavaScript实现是否支持严格模式。
Raw
hasStrictMode.js
var hasStrictMode = (function() {
"use strict";
return this === undefined;
}());
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