Question

我有一个内部可滚动DIV的页面。当我将鼠标悬停在它上面并尝试用鼠标滚轮滚动它时，在主页保持放置时，该DIV的内容会根据需要滚动。但当我到达DIV滚动区域的底部时，整个页面开始滚动。

我尝试在该div上设置事件处理程序，但preventDefault()方法也阻止了DIV本身的滚动。

这是错误的代码：

$('.folderlist').on('DOMMouseScroll mousewheel', function(ev){
    ev.stopPropagation();
    ev.preventDefault();
})

preventDefault（）会阻止页面滚动，但也不允许滚动DIV。

stopPropagation（）在这种情况下什么都不做，我想

我错过了什么吗？..

Answer 1

andbeyond 提出了一个很好的解决方案，虽然它与IE有问题所以我试图修复它们，然后你就去了：

function stopEvent(e) {
    e = e ? e : window.event;
    if (e.stopPropagation) e.stopPropagation();
    if (e.preventDefault) e.preventDefault();
    e.cancelBubble = true;
    e.cancel = true;
    e.returnValue = false;
    return false;
}

$.fn.extend({
    // param: (boolean) onlyWhenScrollbarVisible
    // If set to true, target container will not intercept mouse wheel
    //     event if it doesn't have its own scrollbar, i.e. if there is too
    //     few content in it. I prefer to use it, because if user don't see
    //     any scrollable content on a page, he don't expect mouse wheel to
    //     stop working somewhere.

    scrollStop: function(onlyWhenScrollbarVisible) {
        return this.each(function(){
            $(this).on('mousewheel DOMMouseScroll', function(e) {
                if (onlyWhenScrollbarVisible && this.scrollHeight <= this.offsetHeight)
                    return;

                e = e.originalEvent;
                var delta = (e.wheelDelta) ? -e.wheelDelta : e.detail;
                var isIE = Math.abs(delta) >= 120;
                var scrollPending = isIE ? delta / 2 : 0;
                if (delta < 0 && (this.scrollTop + scrollPending) <= 0) {
                    this.scrollTop = 0;
                    stopEvent(e);
                }
                else if (delta > 0 && (this.scrollTop + scrollPending >= (this.scrollHeight - this.offsetHeight))) {
                    this.scrollTop = this.scrollHeight - this.offsetHeight;
                    stopEvent(e);
                }
            });
        });
    }
});

现在它完全符合我的要求。感谢 andbeyond 为您精彩的博文发布 - http://www.andbeyonddesign.com/Blog/2012/02/Setting-scroll-only-for-scrollable-div

使用示例：$('.folderlist').scrollStop(true);

Answer 2

$('.folderlist').hover(function (){
    $('body').css('overflow','hidden');
}, function (){
    $('body').css('overflow','auto');
})

试试..猜它应该有用

鼠标滚轮在容器内滚动 - 捕捉事件

2 个答案: