使用 jQuery 访问绑定到事件处理程序的函数 [英] Accessing functions bound to event handlers with jQuery
问题描述
借助 jQuery,您可以使用 .bind()
或事件处理程序辅助函数之一将函数绑定到在 DOM 对象上触发的事件.
With jQuery you can bind functions to an event triggered on a DOM object using .bind()
or one of the event handler helper functions.
jQuery 必须以某种方式在内部存储它,我想知道是否有可能给定一个 DOM 对象,找出哪些事件已绑定到该对象,并访问这些函数等.所需的返回结果可能如下所示:
jQuery have to store this internally somehow and I wonder if is it possible given a DOM object, to find out which events have been bound to the object, and access those functions etc. The desired return result could look something like this:
{
click: [function1, function2],
change: [function3],
blur: [function4, function5, function6]
}
推荐答案
编辑:以下方法仅适用于 jQuery <1.7
您可以在本文中找到很多有趣的提示和技巧:你可能不知道的关于 jQuery 的事情.
You can find a lot of interesting tips and tricks in this article: Things you may not know about jQuery.
似乎 jQuery 使用 data
来存储事件处理程序:
It seems that jQuery uses data
to store event handlers:
您可以访问所有事件处理程序绑定到一个元素(或任何对象)通过 jQuery 的事件存储:
You can access all event handlers bound to an element (or any object) through jQuery’s event storage:
// List bound events:
console.dir( jQuery('#elem').data('events') );
// Log ALL handlers for ALL events:
jQuery.each($('#elem').data('events'), function(i, event){
jQuery.each(event, function(i, handler){
console.log( handler['handler'].toString() );
});
});
// You can see the actual functions which will occur
// on certain events; great for debugging!
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