jsfiddle中的这段代码有什么问题 [英] Whats wrong with this code in jsfiddle

问题描述

var x = "window.Something";

alert(window.x)

当我在jsfiddle http://jsfiddle.net/XJEGU/中尝试此代码时，它会发出未定义的警报.当我在浏览器中运行此代码时，它可以正常工作，任何人都可以告诉jsfiddle使用此代码来实现这种行为.

when i try this code in jsfiddle http://jsfiddle.net/XJEGU/, it alerts undefined. While when i run this code in my browser, it works fine, can anybody tell what jsfiddle does with this code for such behavior.

推荐答案

JSFiddle将代码包装在函数中.这意味着x在本地作用于该函数.

JSFiddle wraps code in a function. This means that x is scoped locally to that function.

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