javascript - 记录事件 ID

Question

我需要在事件对象中识别文档上的特定事件。例如

$(document).click(function () {
      console.log(1)
});

$(document).click(function () {
      console.log(2)
});

var events = $._data(document, "events");
console.log(events);

当我记录所有“点击”事件时，它们之间没有区别:

如何为每个事件添加自定义 ID？也许我可以使用命名空间或者我可以更改guid？

我需要检查:“特定事件是否存在？”

Answer 1

您可以绑定(bind)参数并将其传递给回调监听器来识别类型

$(document).click(function (type) {
      console.log(type)
}.bind(this,"i-am-click"));

$(document).click(function (type) {
      console.log(type)
}.bind(this,"i-am-another-click"));

var events = $._data(document, "events");
console.log(events);

更新

要识别事件数组中的特定事件对象，您可以执行以下操作。

 $(document).click(
    (function(){
        var fn = function(){  // Your callback function
                      console.log('i-am-click');
                 };

        fn.event_id=1;  // Adding id to the callback.

        return fn;  // returning the function after adding id
    })()
);

$(document).click(
    (function(){
        var fn = function(){  // Your callback function
                      console.log('i-am-another-click');
                 };

        fn.event_id=2;  // Adding id to the callback.

        return fn;  // returning the callback function after adding id
    })()
);

var events = $._data(document, "events");

// Find the events in the event array using filter

// This will return an array of match event with id in events array
events.click.filter(function(ev){return ev.handler.event_id==1;}); // event id you are looking for