JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr class="five-1">
        <td>
            something           
        </td>
        <td>
                something2      
        </td>
        <td>
            something3          
        </td>
    </tr>
    <tr class="five-2">
        <td>
            something1          
        </td>
        <td>
            something2          
        </td>
        <td>
            something3      
        </td>
    </tr>
</table>

JavaScript

$('tr').each(function(){
          $('td',$(this)).each(function(ind) {
             $(this).addClass('something' + ind);
          });
       });