如何向 jQuery 对象添加新方法?
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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