Vue实现上拉加载下一页效果的示例代码

       /**
         * @name: 监听 滚动条变化
         * @author: camellia
         * @date: 2021-10-10
         */
        const handleScroll = (env:any) => {
            // =========================================================================
            // 回到顶部
            let scrollTop = document.getElementsByClassName('top-div')[0].scrollTop;
            if(scrollTop > 100)
            {
                data.flag_scroll = true
            }
            else
            {
                data.flag_scroll = false
            }
            // ===============================================
            // 上拉加载下一页代码
            let clientHeight = document.getElementsByClassName('top-div')[0].clientHeight;
            let scrollObj = <Element | null>(null);
            // 设备/屏幕高度
            scrollObj = document.querySelector('.top-div'); // 滚动区域
            // var scrollTop_page = document.documentElement.scrollTop || document.body.scrollTop;
            let scrollHeight = data.scrollHeight;
            if (scrollObj != null)
            {
                scrollHeight = scrollObj.scrollHeight // 滚动条的总高度
                data.scrollHeight = scrollHeight;
            }
            console.log("scrollObj：" + scrollObj);
            console.log("scrollHeight：" + scrollHeight);
            console.log("scrollTop:"+scrollTop );
            console.log("clientHeight:"+ clientHeight);
            console.log("total:"+ (scrollTop + clientHeight));
            if ( scrollTop + clientHeight === scrollHeight)
            {
                data.scrollTop = scrollTop;
                // div 到头部的距离 + 屏幕高度 = 可滚动的总高度
                // 滚动条到底部的条件
                getData();// 获取下一页数据
            }//*/
        }