javascript Firefox 中的 window.event 替代方案
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window.event alternative in Firefox
提问by Smax Smaxovi?
I see that window.eventor eventdoes not work in Firefox, so I need alternative for this. I don't want to set ANY HTML attributes, just Javascript.
I'm within this function and I want to get mouse coordinates from here:
我看到了，window.event或者event在 Firefox 中不起作用，所以我需要替代方案。我不想设置任何 HTML 属性，只是 Javascript。我在这个函数中，我想从这里获取鼠标坐标：
document.onmouseover = function(){
var mouseX = event.clientX;
var mouseY = event.clientY;
}
Obviously this won't work in firefox, so I want to know how to do it.
显然这在 Firefox 中不起作用，所以我想知道怎么做。
回答by cookie monster
This is the typical approach that you'll find in examples everywhere.
这是您可以在任何地方的示例中找到的典型方法。
document.onmouseover = function(event) {
event = event || window.event;
var mouseX = event.clientX;
var mouseY = event.clientY;
}
The W3C standard way of retrieving the eventobject is via the first function parameter. Older IE didn't support that approach, so eventwill be undefined. The ||operator lets us fetch the window.eventobject in that case.
检索event对象的 W3C 标准方法是通过第一个函数参数。较早的IE不支持这种做法，所以event会undefined。在这种情况下，||运算符让我们获取window.event对象。
回答by Samuli Hakoniemi
window.event(which you're referring to) is a global object that isn't available in all browsers.
window.event（您所指的）是一个并非在所有浏览器中都可用的全局对象。
document.addEventListener("mouseover", function(evt){
var mouseX = evt.clientX;
var mouseY = evt.clientY;
}, false);
