jquery 弹出浮动层

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>jQuery 弹出浮动层示例</title>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <style>
        .modal {
            display: none;
            position: fixed;
            z-index: 1;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            overflow: auto;
            background-color: rgba(0,0,0,0.4);
        }
        .modal-content {
            background-color: #fefefe;
            margin: 15% auto;
            padding: 20px;
            border: 1px solid #888;
            width: 80%;
        }
        .close {
            color: #aaa;
            float: right;
            font-size: 28px;
            font-weight: bold;
        }
        .close:hover,
        .close:focus {
            color: black;
            text-decoration: none;
            cursor: pointer;
        }
    </style>
</head>
<body>

<button id="openModalBtn">打开浮动层</button>

<div id="myModal" class="modal">
    <div class="modal-content">
        <span class="close">&times;</span>
        <p>这是一个浮动层！</p>
    </div>
</div>

<script>
    $(document).ready(function(){
        var modal = $('#myModal');
        var span = $('.close');

        $('#openModalBtn').click(function() {
            modal.show();
        });

        span.click(function() {
            modal.hide();
        });

        $(window).click(function(event) {
            if (event.target == modal[0]) {
                modal.hide();
            }
        });
    });
</script>

</body>
</html>