Question

我试图在活动原型中添加一种方法。为了打电话/打造preventDefault(,或, in IE-speakreturn 数值 = 虚假和――如果希望-stoppropagation(/cancelBubble = 真实;。我认为以下法典已经足够了。

Event = Event || window.Event;
//^^ makes the fiddle work on IE8 ^^
if(!(Event.prototype.stopEvent))
{
    Event.prototype.stopEvent = function(propagate)
    {
        "use strict";
        propagate = (propagate ? true : false);
        if (this.preventDefault)
        {
            this.preventDefault();
            if (propagate === false)
            {
                this.stopPropagation();
            }
        }
        else
        {
            this.returnValue = false;
            this.cancelBubble = !propagate;
        }
        return this;
    };
}

似乎在工作,,因为你可以在这里看到。该网球显示:OK,载于IE8, 火灾fox and chrome。虽然在我的发言中加上这一点,但IE8打破了第一行,说。页: 1 删除<代码>“严格”;根本不适用。

Reluctantly, I tried this, too:

if (typeof Event === undefined ) { var Event = window.Event || window.event;//FFS IE :-( }

But to no avail: Error: Event.prototype is null or not an object, so I got 1 line further. The thing is, the entire prototype method is a copy paste from my script, but what am I overlooking here? Any idea s/suggestions?
Thanks

PS:我像Pure Javas一样,不建议 j、原型、 do......作为解决办法。 I ve Just gotten rid of jQuery. ∗∗∗∗

Update
情况使情况恶化,我恐怕。 I found thiMSsDN reference。整页处理OMElement原型。可以说,这种说法是完全公平的,并且可以在第8号(在某种程度上)中使用。在该网页上,这部法典引起了我的注意:

Event.prototype.stopPropagation = function () { this.cancelBubble = true; }; Event.prototype.preventDefault = function () { this.returnValue = false; };

可在题为“代码”的栏目中查找下页数的~3/4。我认为,这确实与我想要做的事情相同,但更重要的是:如果我通过黑手党来尝试这一法典,那就连工作了,而我的 j(有我的法典)确实在8国集团工作。这只是最后几条刀子,但就我所能做的工作而言,这些几条法典应当只是罚款。我将其改动如下:

Event.prototype.stopPropagation = function () { if (this.stopPropagation) { return this.stopPropagation(); } this.cancelBubble = true; }; Event.prototype.preventDefault = function () { if (this.preventDefault) { return this.preventDefault(); } this.returnValue = false; };

Answer 1

我最近曾(另一人)洗脑,我认为我找到了更好的办法,来扩大活动原型。严格地说,<代码>Event原型无法在IEE(<9)上查阅,但是,如果你从一个实例(例如:window.event)上回路,则可以查阅。因此,这里有一个在所有主要浏览器上运行的灯塔(和IE8 - 而不是7):

(function()
{
        function ol(e)
        {//we have an event object
            e = e || window.event;
            if (!e.stopEvent)
            {
                if (Object && Object.getPrototypeOf)
                {//get the prototype
                    e = Object.getPrototypeOf(e);
                }
                else
                {//getting a prototype in IE8 is a bit of a faff, this expression works on most objects, though
                 //it s part of my custom .getPrototypeOf method for IE
                    e = this[e.constructor.toString().match(/(function|object)s+([A-Z][^s(]]+)/)[2]].prototype;
                }
                e.stopEvent = function(bubble)
                {//augment it (e references the prototype now
                    bubble = bubble || false;
                    if (this.preventDefault)
                    {
                        this.preventDefault();
                        if (!bubble)
                        {
                            this.stopPropagation();
                        }
                        return this;
                    }
                    this.returnValue = false;
                    this.cancelBubble = !bubble;
                    return this;
                };
            }
            alert(e.stopEvent ?  ok  :  nok );//tested, it alerts ok
            if (this.addEventListener)
            {
                this.removeEventListener( load ,ol,false);
                return;
            }
            document.attachEvent( onkeypress ,function(e)
            {
                e = e || window.event;
                if (e.stopEvent)
                {//another event, each time alerts ok
                    alert( OK! );
                }
            });
            this.detachEvent( onload ,ol);
        }
        if (this.addEventListener)
        {
            this.addEventListener( load ,ol,false);
        }
        else
        {
            this.attachEvent( onload ,ol);
        }
})();

这样一来,头脑膜炎就显得重要了: 我用<代码><对它进行了测试;! DOCTYPE html pub “-/W3C/DTD X/2006/2 1.0 Strict/EN”“http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd”>,并在FF、chrome和IE 8,中开展工作,没有任何问题。使用<条码>和;! DOCTYPE html> 是安全的,尽管如此

Hope this helps someone...

Answer 2

其标准与基茨模式。 The JSFiddle page has a DOCTYPE declaration, albeit an incredibly brief one, <!DOCTYPE html>, that kicks the make into Standards manner. Chances是你的网页,没有DOCTYPE,而DOCTYPE在Qurks模式中留下来。在用你手提的那页上添加了这一简单的“DOCTYPE”之后,它为我工作。

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