console 命令行工具 X clear

console

$(()=>{
    var h = $('body').height();
    $('.app-body-bg').height(h);
    $('.app-body-footer').css('top',h+'px');

    var list = $('#list');
    list.html((()=>{
        var html = '';
        for(var i=0; i< 100; i++){
            html += '<li>jkjkkk</li>';
        }
        return html;
    })());
    $('#list2').html((()=>{
        var html = '';
        for(var i=0; i< 100; i++){
            html += '<li>jkjkkk'+i+'</li>';
        }
        return html;
    })());

    $(document).scroll(()=>{
        var top = $(this).scrollTop();
        console.log(top+'px');
        if (top == 0) {
            if (list.hasClass('app-hide')) {
                list.show();
                list.removeClass('app-hide');
            }
        }else {
            if (!list.hasClass('app-hide')) {
                list.hide();
                list.addClass('app-hide');
            }
        }
    });
})

<body>
    <div class="app-body-bg">
        <div class="app-body">
            <div class="app-body-scroll">
            <ul id="list">
                <li>jkjkkk</li>
            </ul>
            </div>
        </div>
        <div class="app-footer">
            <div class="app-panel">
                app-footer
            </div>
        </div>
        <div class="app-body-footer">
            <div class="app-panel">
            <ul id="list2">
                <li>jkjkkk</li>
            </ul>
            </div>
        </div>
    </div>
</body>

:root {
    --bodyBg: rgb(84, 171, 230);
    --borderRadius: 30px;
}
html,body{
    height: 100%;
    margin: 0;
    padding: 0;
}
body{
    background-color: var(--bodyBg);
}

.app-body,
.app-body-bg,
.app-footer,
.app-body-footer{
    position: absolute;
    left: 0;
    right: 0;
}
.app-body,
.app-footer,
.app-body-footer{
    padding: 0 5vw;
}
.app-body{
    top: 0;
    padding-bottom: 110px;
    height: 100%;
    overflow: hidden;
    box-sizing: border-box;
    /* -ms-overflow-style: none;
    overflow: -moz-scrollbars-none; */
}
.app-body>.app-body-scroll{
    width: calc(100% + 17px);
    height: 100%;
    overflow-y: auto;
}
.app-hide{
    display: none !important;
}
/* .app-body::-webkit-scrollbar,
.app-body::-moz-scrollbar,
.app-body::-ms-scrollbar{
    display: none;
    width: 0 !important;
} */
.app-footer{
    bottom: 0;
    height: 100px;
}
.app-body-footer{
    top: 100%;
    height: auto;
}
.app-body-bg{
    top: 0;
    height: 100%;
    background-size: 100%;
    background-repeat: no-repeat;
    background: linear-gradient(180deg, rgb(4, 4, 73), rgb(245, 241, 223), var(--bodyBg));
}
.app-footer .app-panel,
.app-body-footer .app-panel{
    padding: 1vw 10vw;
    color: balck;
    background-color: white;
}
.app-footer>.app-panel{
    height: 100%;
    border-top-left-radius: var(--borderRadius);
    border-top-right-radius:  var(--borderRadius);
    border-bottom: 1px solid black;
}
.app-body-footer .app-panel{
    border-bottom-left-radius: var(--borderRadius);
    border-bottom-right-radius:  var(--borderRadius);
    margin-bottom: 10px;
}

#list {
    text-align: center;
}

本项目引用的自定义外部资源

jquery.js