Imitation Taobao scroll effect

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        body {
            background: rgba(151, 150, 150, .2);
        }
        
        div {
            background: orange;
            margin-bottom: 10px;
            height: 300px;
            width: 95%;
        }
        
        ul {
            position: absolute;
            list-style: none;
            margin: 0;
            padding: 0;
            top: 360px;
            right: 10px;
            background: white;
        }
        
        li {
            width: 40px;
            height: 40px;
            font-size: 14px;
            text-align: center;
            margin: 5px auto;
            border-top: rgb(214, 210, 210) 1px solid;
        }
        
        .top {
            display: none;
        }
    </style>
</head>

< Body > 
    < div > </ div > 
    < div > </ div > 
    < div > </ div > 
    < div > </ div > 
    < div > </ div > 
    < UL > 
        < Li > affordable Hot </ Li > 
        < li > Taobao Features </ li > 
        < li > you may also like </ li > 
        <li class="top"> < Span > top </ span > </ Li > 
        < Li > Feedback </ Li > 
        < Li > violent fear Report </ Li > 
    </ UL >

    <script>
        var div = document.querySelectorAll('div');
        for (var i = 0; i < div.length; i++) {
            if (i % 2 == 0) {
                div[i].style.backgroundColor = 'pink';
            }
        }
        var site = document.querySelector ( ' site ' );
        document.addEventListener ( ' Scroll ' , function () {
             // get the page to the volume portion with window.pageYOffset 
            IF (window.pageYOffset > =  300 ) {
                ul.style.position = 'fixed';
                ul.style.top = 60 + 'px';
            } else {
                ul.style.position = 'absolute';
                ul.style.top = 360 + 'px';
            }
            var top = document.querySelector('.top');
            if (window.pageYOffset >= 370) {
                top.style.display = 'block';
            } else {
                top.style.display = 'none';
            }
            // console.log(window.pageYOffset);
        })
    </script>
</body>

</html>

 

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Origin www.cnblogs.com/qtbb/p/11706165.html