JSFiddle - React, Tailwind, and code Playground

by Shree Khanal

HTML

<table>

  <tr>
    <td>Age</td>
    <td>
      <input type="text" name="age" id="age">
    </td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>
  <tr id='trGuardian' style="display:none">
    <td> Guardian</td>
    <td>
      <input name="guardian" id="guardian">
    </td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>

</table>

JavaScript

$("#age").blur(function() {
  if (parseInt($(this).val()) < 15)
    $('#trGuardian').show();
  else
    $('#trGuardian').hide();
});