用于标记匿名函数的Javascript“冒号"? [英] Javascript 'colon' for labeling anonymous functions?

问题描述

这段代码也指的是什么?

What does this code refer too?

queryString: function() {

//some code

}

我在 WebConsole (Firefox) 中对其进行了测试，但它无法执行，因此我认为它不等同于 function queryString() {}.

I tested it in the WebConsole (Firefox) but it wouldn't execute, so I'm thinking that it isn't equivalent to function queryString() {}.

那究竟是什么?

推荐答案

你在那里遗漏了一些代码，但我认为它是这样的对象声明的一部分:

You are missing some code there, but I assume its part of an object declaration like this:

var obj = {
  queryString: function() {
    //some code
  }
};
obj.queryString();

它将函数分配为对象字面量的属性.这相当于:

It assigns a function as a property of an object literal. It would be equivalent to this:

var obj = {};
obj.queryString = function() { ... };
obj.queryString();

通常，对象字面量语法如下所示:

In general, the object literal syntax looks like this:

{ key: value, otherKey: otherValue };

所以这在控制台中不起作用的原因是它没有包含在 {} 字符中，表示对象文字.并且此语法仅在对象字面量中有效.

So the reason this didn't work in the console is that it was not enclosed in {} characters, denoting an object literal. And this syntax is valid ONLY in an object literal.

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