Highlight groups of table columns

Question

I have a column for which I need to highlight adjacent columns.

For the below example fiddle:

<table border="1" style="width:100%;">
  <tbody>
    <tr>
      <th>Number</th>
      <th>First Name</th>
      <th>Last Name</th>
      <th>Points</th>
    </tr>
    <tr>
      <td>1</td>
      <td>Eve</td>
      <td>Jackson</td>
      <td>94</td>
    </tr>
    <tr>
      <td>2</td>
      <td>John</td>
      <td>Doe</td>
      <td>80</td>
    </tr>
    <tr>
      <td>3</td>
      <td>Adam</td>
      <td>Johnson</td>
      <td>67</td>
    </tr>
    <tr>
      <td>4</td>
      <td>Jill</td>
      <td>Smith</td>
      <td>50</td>
    </tr>
  </tbody>
</table>

I need to show an extra border around the below pairs of columns

• Number and First Name
• Last Name and Points

How do I do it?

Any suggestions, kind folks?

Answer 1

You can achieve this using :nth-child selector.

tr:first-child th:nth-child(1), tr:first-child th:nth-child(2){
   border: 1px solid red;
   border-bottom: 0;
}

tr td:nth-child(1), tr td:nth-child(2){
   border-left: 1px solid red;
   border-right: 1px solid red;
}

tr:last-child td:nth-child(1), tr:last-child td:nth-child(2){
   border-bottom: 1px solid red;
}

tr:first-child th:nth-child(3), tr:first-child th:nth-child(4){
   border: 1px solid green;
   border-bottom: 0;
}

tr td:nth-child(3), tr td:nth-child(4){
   border-left: 1px solid green;
   border-right: 1px solid green;
}

tr:last-child td:nth-child(3), tr:last-child td:nth-child(4){
   border-bottom: 1px solid green;
}

<table border="1" style="width:100%;">
  <tbody>
    <tr>
      <th>Number</th>
      <th>First Name</th>
      <th>Last Name</th>
      <th>Points</th>
    </tr>
    <tr>
      <td>1</td>
      <td>Eve</td>
      <td>Jackson</td>
      <td>94</td>
    </tr>
    <tr>
      <td>2</td>
      <td>John</td>
      <td>Doe</td>
      <td>80</td>
    </tr>
    <tr>
      <td>3</td>
      <td>Adam</td>
      <td>Johnson</td>
      <td>67</td>
    </tr>
    <tr>
      <td>4</td>
      <td>Jill</td>
      <td>Smith</td>
      <td>50</td>
    </tr>
  </tbody>
</table>