H5鼠标向上滚动事件

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/devilcry13/article/details/81911779

<script type="text/javascript">
    var scrollFunc = function (e) {
        var angle = 0 ;
        if (e.wheelDelta) {//IE/Opera/Chrome  
            angle = e.wheelDelta;
        } else if (e.detail) {//Firefox  
            angle = e.detail;
        }
        if(angle>0) {
            alert("鼠标滚动角度："+angle);
        }
    }

    /*注册事件*/
    if (document.addEventListener) {
        document.addEventListener('DOMMouseScroll', scrollFunc, false);
    }//W3C
    //window.onmousewheel = scrollFunc
    document.onmousewheel = scrollFunc; //IE/Opera/Chrome/Safari  

</script>