有没有办法找回在原型中向Event.observe注册的匿名事件处理程序? [英] Is there a way to get back anonymous event handlers that were registered with Event.observe in Prototype?

问题描述

与遗留代码接口，我有类似这样的东西:

Interfacing with legacy code, and I've got something like this:

Event.observe(some_form, 'submit', [some anonymous function])

我想收回匿名事件处理程序，在Prototype中有一种简单的方法吗?

I'd like to grab that anonymous event handler back out, is there an easy way to do that in Prototype?

推荐答案

这取决于Prototype的版本.从更一般的答案中我以前写过:

It depends on the version of Prototype. From a more general answer I wrote previously:

• 版本1.5.x:

• version 1.5.x:

// inspect
Event.observers.each(function(item) {
    if(item[0] == some_form && item[1] == 'submit') {
        alert(item[2]) // [some anonymous function]
    }
})

版本1.6到1.6.0.3(含)(在这里很难)

versions 1.6 to 1.6.0.3, inclusive (got very difficult here)

// inspect. "_eventId" is for < 1.6.0.3 while 
// "_prototypeEventID" was introduced in 1.6.0.3
var submitEvents = Event.cache[some_form._eventId || (some_form._prototypeEventID || [])[0]].submit;
submitEvents.each(function(wrapper){
    alert(wrapper.handler) // [some anonymous function]
})

[当前]版本1.6.1(好一点)

[Current] version 1.6.1 (little better)

// inspect
var submitEvents = some_form.getStorage().get('prototype_event_registry').get('submit');
submitEvents.each(function(wrapper){
    alert(wrapper.handler) // [some anonymous function]
})

这篇关于有没有办法找回在原型中向Event.observe注册的匿名事件处理程序?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！