JSFiddle - React, Tailwind, and code Playground

HTML

<a onclick="window.open('data:application/vnd.ms-excel,' + '\uFEFF' +  encodeURIComponent( test.innerHTML))">save</a>
<div id="test">
<table >
    <thead>
        <tr>
            <td>test1</td>
            <td>test2</td>
            <td>test3</td>
        </tr>
    </thead>
    <tbody>
        <tr><td>1</td><td>1</td><td>1</td></tr>
        <tr><td>2</td><td>2</td><td>2</td></tr>
        <tr><td>3</td><td>3</td><td>3</td></tr>
    </tbody>
</table>
</div>