添加事件监听器跨浏览器

Question

我的问题在这里:为什么这段代码不起作用????? ...邮件没有出现

我正试图在事件点击时向元素x添加事件监听器

    function test()
    {
    alert("test");
    }

var EventsCrossBrowsers = 
 {
    addEvents:(function(element,event,func)
              {
                    if(element.addEventListener)
                    {
                        return elemenet.addEventListener(event,func,false);
                    }
                    else if(elemenet.attachEvent)
                    {
                        return elemenet.attachEvent("on"+event,func);
                    }
              }());
 }

 var x =document.getElementById("test");

EventsCrossBrowsers.addEvents(x,"click",test);

非常感谢jfriend00 ....我认为最微笑的方式: -

function test()
{
    alert("test");
}

function addEventsCrossBrowsers(elemenet,event,func)
{
    if(elemenet.addEventListener)
    {
        elemenet.addEventListener(event,func,false);
    }
    else if(elemenet.attachEvent)
    {
        elemenet.attachEvent("on"+event,func);
    }
}
var x =document.getElementById("test");
addEventsCrossBrowsers(x,"click",test);

你的第二种方式几乎是一样的,除了我不理解回报...再次感谢你...

Answer 1

在你的功能,我看你同时使用elemenet,并element在那里他们应该是相同的拼写.这至少是问题的一部分.

我还看到你的addEvents函数是一个自执行函数,在这方面没有意义.看起来它应该只是一个正常的功能.

这是我的跨浏览器事件功能.除了创建一个用于添加事件处理程序的函数之外,它还对this指针和events对象进行规范化,以便在任何浏览器中对它们进行相同的处理.

// add event cross browser
function addEvent(elem, event, fn) {
    // avoid memory overhead of new anonymous functions for every event handler that's installed
    // by using local functions
    function listenHandler(e) {
        var ret = fn.apply(this, arguments);
        if (ret === false) {
            e.stopPropagation();
            e.preventDefault();
        }
        return(ret);
    }

    function attachHandler() {
        // set the this pointer same as addEventListener when fn is called
        // and make sure the event is passed to the fn also so that works the same too
        var ret = fn.call(elem, window.event);   
        if (ret === false) {
            window.event.returnValue = false;
            window.event.cancelBubble = true;
        }
        return(ret);
    }

    if (elem.addEventListener) {
        elem.addEventListener(event, listenHandler, false);
        return {elem: elem, handler: listenHandler, event: event};
    } else {
        elem.attachEvent("on" + event, attachHandler);
        return {elem: elem, handler: attachHandler, event: event};
    }
}

function removeEvent(token) {
    if (token.elem.removeEventListener) {
        token.elem.removeEventListener(token.event, token.handler);
    } else {
        token.elem.detachEvent("on" + token.event, token.handler);
    }
}

如果你想要一个没有传播和默认防护选项的简单版本,但是使用this和event规范化,那就是:

// add event cross browser
function addEvent(elem, event, fn) {
    if (elem.addEventListener) {
        elem.addEventListener(event, fn, false);
    } else {
        elem.attachEvent("on" + event, function() {
            // set the this pointer same as addEventListener when fn is called
            return(fn.call(elem, window.event));   
        });
    }
}