javascript - How to achieve the return to top effect on the mobile phone? (The scroll bar on the mobile phone will be hidden and cannot be detected) The anchor function of the sui framework a I use cannot be used. Is there a js method?

Question

Like the title, because the sui framework is used, the anchor link effect of a has no effect. Although I disabled the routing function, it still doesn't work. Is there any js method to return to the top? Or is there a master who is familiar with the sui framework? How should I implement it?

天蓬老师 · Answer

    //当滚动条的位置处于距顶部100像素以下时，跳转链接出现，否则消失
    $(function () {
        $(window).scroll(function () {
            if ($(window).scrollTop() > 100) {
                $("#back-to-top").fadeIn(1000);
                console.log($(window).scrollTop())
                console.log(window.innerHeight)
            }
            else {
                $("#back-to-top").fadeOut(1000);
            }
        });
        //当点击跳转链接后，回到页面顶部位置
        $("#back-to-top").click(function () {
            $('body,html').animate({scrollTop: 0}, 1000);
            return false;
        });
    });

I wrote a small demo that can be triggered




    
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 我是主体内容


  返回顶部