CODE EXAMPLE FOR JAVASCRIPT

how to add autoserial number in react js

<table border="1">
    <thead>
        <tr>
            <th>Automatic Serial number</th>
            <th>Column 1</th>
            <th>Column 2</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td></td>
            <!--leave it blank-->
            <td>Column 1</td>
            <td>Column 2</td>
        </tr>
        <tr>
            <td></td>
            <!--leave it blank-->
            <td>Column 1</td>
            <td>Column 2</td>
        </tr>
        <tr>
            <td></td>
            <!--leave it blank-->
            <td>Column 1</td>
            <td>Column 2</td>
        </tr>
        <tr>
            <td></td>
            <!--leave it blank-->
            <td>Column 1</td>
            <td>Column 2</td>
        </tr>
        <tr>
            <td></td>
            <!--leave it blank-->
            <td>Column 1</td>
            <td>Column 2</td>
        </tr>
        <tr>
            <td></td>
            <!--leave it blank-->
            <td>Column 1</td>
            <td>Column 2</td>
        </tr>
        <tr>
            <td></td>
            <!--leave it blank-->
            <td>Column 1</td>
            <td>Column 2</td>
        </tr>
        <tr>
            <td></td>
            <!--leave it blank-->
            <td>Column 1</td>
            <td>Column 2</td>
        </tr>
    </tbody>
</table>