使用jq让页面滚动到顶部<meta name="viewport" content="width=device-widt

以下是完整代码

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

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://how2j.cn/study/jquery.min.js"></script>
    <style>

        .toTop {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            box-shadow: 0px 4px 10px 0px rgba(0, 0, 0, 0.24);
            position: fixed;
            bottom: 48px;
            right: 12px;
            text-align: center;
        }
    </style>
</head>

<body>
    <div id="toTop" class="toTop">回到顶部</div>
</body>

</html>

<script>
    for (var i = 0; i < 200; i++) {
        $('body').append(i + '<br />')//为了使看的更清楚，给页面添加点元素
    }
    $('#toTop').click(function () {
        $('html').animate({ scrollTop: 0 }, 500)//页面滚动效果
    })
</script>