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javascript - 功能上的额外括号

转载 作者:可可西里 更新时间:2023-11-01 02:35:54 24 4
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Possible Duplicate:
What do parentheses surrounding a JavaScript object/function/class declaration mean?
What does this “(function(){});”, a function inside brackets, mean in javascript?
A Javascript function

我遇到了类似这样的标记:

var something = (function(){
//do stuff
return stuff;
})()
document.ondblclick = function(e) { alert(something(e)) };

我不明白 something 变量中的开始 ( 和结束 )() 。你能解释一下这样写的区别吗?

var something = function(){
//do stuff
return stuff;
};

谢谢!

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