JSFiddle - React, Tailwind, and code Playground

by Павел KLON

HTML

<script src="https://code.jquery.com/jquery-3.4.1.slim.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.css">
<input type="text" name="" id="nval" value="8">

<table class='example table table-bordered'>
  <thead>
    <tr>
      <td>Имя</td>
      <td>Фамилия</td>
      <td>Должность</td>
      <td><input type="text" class="hours"></td>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Павел</td>
      <td>Павлов</td>
      <td>ТЫЖпрограммист</td>
      <td><input type="text" class="hours"></td>
    </tr>
    <tr>
      <td>Павел</td>
      <td>Дуров</td>
      <td>миллионер</td>
      <td><input type="text" class="hours"></td>
    </tr>
  </tbody>
</table>

JavaScript

$("#nval").change(function () {
	
  var nval = $("#nval").val();
  
  if($(".hours").val == )

});