javascript 鼠标滚轮事件在 ie 中不起作用
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mousewheel event is not working in ie
提问by Juan Gonzales
I am working on an application and I need to track the mouse wheel movement but my functions are not working as I expect in Internet Explorer. It works in all other browsers but not IE, any ideas on what I am doing wrong?
我正在开发一个应用程序，我需要跟踪鼠标滚轮的移动，但我的功能在 Internet Explorer 中没有像我期望的那样工作。它适用于所有其他浏览器，但不适用于 IE，对我做错了什么有任何想法吗？
JS...
JS...
var request = true;
var onMouseWheelSpin = function(event) {
if(request === true){
request = false;
var nDelta = 0;
if (!event) { event = window.event; }
// cross-bowser handling of eventdata to boil-down delta (+1 or -1)
if ( event.wheelDelta ) { // IE and Opera
nDelta= event.wheelDelta;
if ( window.opera ) { // Opera has the values reversed
nDelta= -nDelta;
}
}
else if (event.detail) { // Mozilla FireFox
nDelta= -event.detail;
}
if (nDelta > 0) {
zoomFun( 1, event );
}
if (nDelta < 0) {
zoomFun( -1, event );
}
if ( event.preventDefault ) { // Mozilla FireFox
event.preventDefault();
}
event.returnValue = false; // cancel default action
}
}
var zoomFun = function(delta,e) {
if(delta > 0){ // zoom in
alert("In");
}else{ // zoom out
alert("Out");
}
request = true;
}
var setupMouseWheel = function(){
// for mouse scrolling in Firefox
var elem = document.getElementById("zoom");
if (elem.addEventListener) { // all browsers except IE before version 9
// Internet Explorer, Opera, Google Chrome and Safari
elem.addEventListener ("mousewheel", onMouseWheelSpin, false);
// Firefox
elem.addEventListener ("DOMMouseScroll", onMouseWheelSpin, false);
}else{
if (elem.attachEvent) { // IE before version 9
elem.attachEvent ("onmousewheel", onMouseWheelSpin);
}
}
}
I am calling the setupMouseWheel function onload in the body aka
我在体内调用 setupMouseWheel 函数 onload 又名
<body onload="setupMouseWheel();">
Thanks for the help!
谢谢您的帮助！
采纳答案by Juan Gonzales
I finally found a great cross browser approach here for anyone who has a similar issue
我终于在这里找到了一个很好的跨浏览器方法，适用于任何有类似问题的人
https://developer.mozilla.org/en-US/docs/Web/Reference/Events/wheel
https://developer.mozilla.org/en-US/docs/Web/Reference/Events/wheel
回答by Dave
To listen to the mouse wheel, it's best to listen to DOMMouseScroll, mousewheeland wheel. The last one is IE, and is the only one you're not listening for.
要听鼠标滚轮，最好听DOMMouseScroll,mousewheel和wheel。最后一个是 IE，并且是唯一一个你没有在听的。
I'll also point out that jQuery has a shortcut for binding multiple events:
我还要指出 jQuery 有一个绑定多个事件的快捷方式：
$(elem).on("DOMMouseScroll mousewheel wheel", onMouseWheelSpin);
update: noticed that though you tagged this as jQuery, you're not actually using it. To do this without jQuery, just carry on as you are but add a wheelevent listener like the others.
更新：请注意，尽管您将其标记为 jQuery，但您实际上并未使用它。要在没有 jQuery 的情况下执行此操作，只需按原样继续操作，但要wheel像其他人一样添加一个事件侦听器。
