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table固定表头

主要是通过position: sticky;属性完成，简单一点的表头固定需求基本没问题

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

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Sticky Table Header</title>
    <style>
        th {
            position: sticky;
            top: 0;
            background-color: #f9f9f9;
        }

        table {
            border-collapse: collapse;
            width: 100%;
        }

        th,
        td {
            border: 1px solid black;
            padding: 10px;
            text-align: left;
        }
    </style>
</head>

<body>

    <table>
        <thead>
            <tr>
                <th>Header 1</th>
                <th>Header 2</th>
                <th>Header 3</th>
            </tr>
        </thead>
        <tbody>
            <tr>
                <td>Data 1</td>
                <td>Data 2</td>
                <td>Data 3</td>
            </tr>
            <tr>
                <td>Data 1</td>
                <td>Data 2</td>
                <td>Data 3</td>
            </tr>
            <tr>
                <td>Data 1</td>
                <td>Data 2</td>
                <td>Data 3</td>
            </tr>
            <tr>
                <td>Data 1</td>
                <td>Data 2</td>
                <td>Data 3</td>
            </tr>
            <tr>
                <td>Data 1</td>
                <td>Data 2</td>
                <td>Data 3</td>
            </tr>
            <tr>
                <td>Data 1</td>
                <td>Data 2</td>
                <td>Data 3</td>
            </tr>
        </tbody>
    </table>

</body>

</html>