我的任务是在不使用 jQuery 或原型(prototype)等任何库的情况下触发文档上的自定义事件。
所以我同意 Firefox 这样做:
function fireCustomEvent(eventData)
{
if (document.createEvent) // Firefox
{
var event = document.createEvent('HTMLEvents'); // create event
event.initEvent('myCustomEvent', true, true ); // name event
event.data = eventData; // put my stuff on it
document.dispatchEvent(event); // fire event
}
else if (document.createEventObject) // IE
{
xxxxxxxxxxx
}
}
现在我可以像这样触发它:
fireCustomEvent({
category: 'test',
value: 123
});
然后像这样捕获它(这里我可以使用 jQuery):
$(document).bind('myCustomEvent', function (event) {
doStuff(event);
});
我的问题是，我该怎么做才能使其在 IE 上工作(换句话说，我把 xxxxxxxxxx 放在哪里)？
我认为 IE 等效项应该如下所示:
var event = document.createEventObject();
event.data = eventData;
document.fireEvent('myCustomEvent', event);
但这行不通。 IE 允许我仅使用预定义的事件名称(onclick 等)，甚至其中一些不起作用(例如 onmessage)
感谢任何帮助或想法!
最佳答案
在没有任何框架的情况下使用 Javascript 添加/删除/触发事件/自定义事件:
var htmlEvents = {// list of real events
//<body> and <frameset> Events
onload:1,
onunload:1,
//Form Events
onblur:1,
onchange:1,
onfocus:1,
onreset:1,
onselect:1,
onsubmit:1,
//Image Events
onabort:1,
//Keyboard Events
onkeydown:1,
onkeypress:1,
onkeyup:1,
//Mouse Events
onclick:1,
ondblclick:1,
onmousedown:1,
onmousemove:1,
onmouseout:1,
onmouseover:1,
onmouseup:1
}
function triggerEvent(el,eventName){
var event;
if (typeof window.CustomEvent === 'function') {
event = new CustomEvent(eventName);
} else if (document.createEvent) {
event = document.createEvent('HTMLEvents');
event.initEvent(eventName,true,true);
}else if(document.createEventObject){// IE < 9
event = document.createEventObject();
event.eventType = eventName;
}
event.eventName = eventName;
if(el.dispatchEvent){
el.dispatchEvent(event);
}else if(el.fireEvent && htmlEvents['on'+eventName]){// IE < 9
el.fireEvent('on'+event.eventType,event);// can trigger only a real event (e.g. 'click')
}else if(el[eventName]){
el[eventName]();
}else if(el['on'+eventName]){
el['on'+eventName]();
}
}
function addEvent(el,type,handler){
if(el.addEventListener){
el.addEventListener(type,handler,false);
}else if(el.attachEvent && htmlEvents['on'+type]){// IE < 9
el.attachEvent('on'+type,handler);
}else{
el['on'+type]=handler;
}
}
function removeEvent(el,type,handler){
if(el.removeEventListener){
el.removeEventListener(type,handler,false);
}else if(el.detachEvent && htmlEvents['on'+type]){// IE < 9
el.detachEvent('on'+type,handler);
}else{
el['on'+type]=null;
}
}
var _body = document.body;
var customEventFunction = function(){
console.log('triggered custom event');
}
// Subscribe
addEvent(_body,'customEvent',customEventFunction);
// Trigger
triggerEvent(_body,'customEvent');
关于javascript - 不使用库的 IE 中的自定义事件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5342917/