js：监听页面滚动scroll的距离

代码如下

    body {
        height: 200vh;
    }



    
        /**
         * 监听页面滚动
         * */
        window.addEventListener('scroll', function () {
            var scrollTop = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop;
            console.log(scrollTop);
        })