js防抖 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="../css_com/reset.css">
    <style>
        .parent{
            overflow: auto;
            margin:10px auto;
            width: 300px;
            height: 300px;
            border:1px solid red;
        }
        .child{
            margin:0 auto;
            width: 200px;
            height: 2400px;
            background-color: #56fff3;
        }
    </style>
    <!--网络cdn提供jquery,自己下载好引用一样-->
    <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.js"></script>
</head>
<body>
    <!--<div class="parent" id="parent">-->
        <!---->
    <!--</div>-->
    <div class="child" id="child"></div>
<script>
    // 防抖
    function debounce(fn, wait) {
        var timeout = null;
        return function() {
            if(timeout !== null)   clearTimeout(timeout);
            timeout = setTimeout(fn, wait);
        }
    }
    // 处理函数
    function handle() {
        console.log(Math.random());
    }
    // 滚动事件
    window.addEventListener('scroll', debounce(handle, 1000));
</script>
</body>
</html>

　　

posted @ 2019-12-30 08:51  sct春天  阅读(188)  评论(0)    收藏  举报