JSFiddle - React, Tailwind, and code Playground

HTML

<TABLE>
   <TR>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
   </TR>
   <TR>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
   </TR>
</TABLE>

<TABLE>
   <TR>
      <TH>Row 1</TH>
      <TH>Row 2</TH>
      <TH>Row 3</TH>
   </TR>
   <TR>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
   </TR>
   <TR>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
   </TR>
</TABLE>

<TABLE>
   <TR>
      <TH>Row 1</TH>
      <TH>Row 2</TH>
      <TH>Row 3</TH>
   </TR>
   <TR>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
   </TR>
   <TR>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
   </TR>
</TABLE>

CSS

table{
    margin : 10px;    
}

td, th{
    border : 1px solid #e0e0e0;
    padding : 10px;
}

JavaScript

$('td:nth-child(2), th:nth-child(2)', 'table:eq(1) tr').css('background', '#f00');