子元素scroll父元素容器不跟隨滾動JS實現

$.fn.scrollUnique = function() {
    return $(this).each(function() {
        var eventType = 'mousewheel';
        if (document.mozHidden !== undefined) {
            eventType = 'DOMMouseScroll';
        }
        $(this).on(eventType, function(event) {
            // 一些數據
            var scrollTop = this.scrollTop,
                scrollHeight = this.scrollHeight,
                height = this.clientHeight;

            var delta = (event.originalEvent.wheelDelta) ? event.originalEvent.wheelDelta : -(event.originalEvent.detail || 0);        

            if ((delta > 0 && scrollTop <= delta) || (delta < 0 && scrollHeight - height - scrollTop <= -1 * delta)) {
                // IE瀏覽器下滾動會跨越邊界直接影響父級滾動，因此，臨界時候手動邊界滾動定位
                this.scrollTop = delta > 0? 0: scrollHeight;
                // 向上滾 || 向下滾
                event.preventDefault();
            }        
        });
    });    
};

$('#test').scrollUnique();

本文轉自 張鑫旭的文章http://www.zhangxinxu.com/wordpress/2015/12/element-scroll-prevent-parent-element-scroll-js/