如何向 jQuery 对象添加新方法?

How to add new methods to the jQuery object?(如何向 jQuery 对象添加新方法?)

问题描述

有没有办法给 jQuery 的对象添加方法?

Is there some way to add methods to jQuery's objects?

例如，我有 jQuery 对象

For example, I have jQuery object

a = $('div')

我希望这样分配的每个对象都有特定的方法 (doSomething())，所以我可以像调用它一样调用它

I'd like that every object which was assigned like that, would have particular method (doSomething()) so I could invoke it like

a = $('.foo')
a.doSomething()

b = $('.bar')
b.doSomething()

推荐答案

你必须将你的函数添加到 $.fn 命名空间.请注意，在函数内部，this 将引用 jQuery 对象，而不是 DOM 对象.

You have to add your function to the $.fn namespace. Please note that inside the function, this will refer to the jQuery object, not a DOM object.

$.fn.doSomething = function () {
    this.css('color', 'red');
};

$('#retk').doSomething();

jsFiddle 演示

请阅读编写jQuery插件以获取更多指南.

Please read about writing jQuery plugins for additional guidelines.

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