jQuery_duplicate/hover_demo.html at master · kyleliu-code/jQuery_duplicate · GitHub

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<!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>Hover_demo</title>
    <script src="https://code.jquery.com/jquery-3.3.1.js" integrity="sha256-2Kok7MbOyxpgUVvAk/HJ2jigOSYS2auK4Pfzbm7uH60=" crossorigin="anonymous"></script>
    <style>
        header {
            text-align: center;
        }

        .sub-menu {
            position: absolute;
            width: 200px;
            height: 200px;
            background-color: lime;
            display: none;
        }
    </style>
</head>

<body>
    <article>
        <header>
            <nav>
                <a href="#">菜单1</a>
                <a href="#">菜单2</a>
            </nav>
        </header>

    </article>
    <div class="sub-menu">
        菜单展示
    </div>
    <script>
        $('header a').hover(function () {
            console.log('onmouseenter');
            var offset = $(this).offset();
            $('.sub-menu').show().css({
                left: offset.left,
                top: offset.top + $(this).height()
            });
        }, function () {
            console.log('onmouseout');
            $('.sub-menu').hide();
        });

        $('.sub-menu').hover(function (){
            $(this).show();
        }, function () {
            $(this).hide();
        })
        // 二级菜单的展示可以做成接口的形式，棒棒哒
        //
    </script>
</body>

</html>