JSFiddle - React, Tailwind, and code Playground

by Avi Algaly

HTML

<table border="1">
  <thead>
    <tr>
      <th></th>
      <th colspan="2">Letters</th>
    </tr>
    <tr>
      <th></th>
      <th>a</th>
      <th>b</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td rowspan="1">Numbers</td>
      <td>1</td>
      <td>4</td>
    </tr>
    <tr>
      <td>2</td>
      <td>5</td>
    </tr>
    <tr>
      <td>3</td>
      <td>6</td>
    </tr>
  </tbody>
</table>

CSS

table {width:100%;}