函数在定义之前使用 - JSLint [英] Function was used before it was defined - JSLint

问题描述

JSLint不喜欢这段代码说''b'在定义之前就被使用了

JSLint does not like this code saying "'b' was used before it was defined"

var a = function () {
        b();
    },

    b = function () {
        alert("Hello, world!");
    };

a();   

但对此非常满意

var a, b;

a = function () {
    b();
};

b = function () {
    alert("Hello, world!");
};

a();   

但我不是在我的第二个代码片段中定义任何内容。我只是声明变量b。

But I am not defining anything in my second code snippet. I am merely declaring variable b.

那么为什么JSLint这样做呢？我有理由首先声明我的所有功能吗？

So why is JSLint doing this? Is there a reason I should be declaring all my functions first?

PS我明白我可以改变a和b的顺序，但在实际项目中我的功能是事件处理程序，有时他们互相调用，所以这可能是不可能的。

PS I understand I could have just changed order of a and b, but in real project my functions are event handlers and sometimes they call each other, so it is probably not possible.

推荐答案

如果您的代码编写得很好并且对象 - 面向，可以在使用之前声明您的功能。但是JSLint设置了许多与应用程序功能无关的标准，我真的怀疑是否有任何性能影响以某种方式声明函数。

If your code is well-written and object-oriented, it is possible to declare your functions before they are used. But JSLint sets a lot of standards that really have little relevance to the functionality of your application, and I really doubt there are any performance implications declaring functions one way or the other.

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