JSFiddle - React, Tailwind, and code Playground

HTML

<table border="1">
  <tr class="top bottom row" >
    <td>one one</td>
    <td>one two</td>
      <td>one one</td>
    <td>one two</td>
    
  
  </tr>
 
  
</table>

CSS

tr.top td { border-top: thin solid black; }
tr.bottom td { border-bottom: thin solid black; }
tr.row td:first-child { border-left: thin solid black; }
tr.row td:last-child { border-right: thin solid black; }
tr.row td:three-first-child { border-right: thin solid black; }