JavaScript YUI3使用全局变量？

问题描述

我无法解决如何从YUI3中更新全局变量。

请考虑以下代码：

  window.myVariable ='data-one'; 
 var yuiWrap = YUI（）。use（'node'，function（Y）{
 console.log（window.myVariable）; //'data-one'
 window.myVariable = 'data-two'; 
 console.log（window.myVariable）; //'data-two'
}）; 
 console.log（window.myVariable）; //'data-one'
  

任何人都可以向我解释这个问题吗？这让我很麻烦。为什么可以访问window.myVariable但是没有从YUI3块中正确更新？

我认为它可能与，但我不明白为什么Closures应该应用于全局窗口对象。

$ b $

I can't work out how to update a global variable from within YUI3.

Consider the following code:

window.myVariable = 'data-one';
var yuiWrap = YUI().use('node',function(Y) {
  console.log(window.myVariable); // 'data-one'
  window.myVariable = 'data-two';
  console.log(window.myVariable); // 'data-two'
});
console.log(window.myVariable); // 'data-one'

Can anyone explain this to me? It's causing me a lot of trouble. Why can window.myVariable be accessed but not properly updated from within a YUI3 block?

I think it might have something to do with Closures but I don't understand why Closures should apply to the global "window" object.

Help?

解决方案

The callback is not fired immediately but after something happened:

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