添加带有sevral参数的事件侦听器，并在以后将其删除 [英] Add an event listener with sevral parameters and remove it later

问题描述

这似乎是一个非常受欢迎的问题，尽管我似乎没有找到任何答案.

This seems to be a very popular question though i didn't seem to find any pertinat answers.

我附加了一个事件监听器，例如:

I attach an event listen like :

window.addEventListener('scroll', fnName, false);

问题是fnName需要几个参数，所以我尝试了

The problem is that fnName expect several parameters, so i then triedl

window.addEventListener('scroll', (function( e ){
   return fnName(e, some, param )
}()), false)

但随后window.removeEventListener不再起作用，所以我尝试了:

but then window.removeEventListener do not work anymore so i tried:

window.removeEventListener('scroll', (function( e ){
   return fnName(e, some, param )
}()), false)

推荐答案

每次声明一个匿名函数时，它都会创建一个新的函数实例.如果要删除现有功能，则需要保留该功能实例的副本.

Every time you declare an anonymous function, it creates a new function instance. If you want to remove an existing function, you need to retain a copy of the function instance.

var temp = function () {
    fnName(e, some, param);
};
window.addEventListener('scroll', temp, false);
//elsewhere,
window.removeEventListener('scroll', temp, false);

---

我还应该注意使用

---

I should also note that using

(function (e){
     return fnName(e, some, param)
}());

以undefined作为第一个参数立即调用fnName.我怀疑那是你的意图.

calls fnName immediately with undefined as the first parameter. I doubt that's your intention.

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