JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<link rel="stylesheet" href="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<div class="col">
    <h3>Account Settings</h3>
    <ul class="nav nav-tabs mt-4" id="settingsTabs" role="tablist">
      <li class="nav-item">
        <a class="nav-link active" id="account-tab" data-toggle="tab" href="#account" role="tab" aria-controls="account" aria-selected="true">Account</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" id="settings-tab" data-toggle="tab" href="#settings" role="tab" aria-controls="settings" aria-selected="false">Settings</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" id="contact-tab" data-toggle="tab" href="#followers" role="tab" aria-controls="followers" aria-selected="false">Followers</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" id="contact-tab" data-toggle="tab" href="#following" role="tab" aria-controls="following" aria-selected="false">Following</a>
      </li>
    </ul>

    <div class="tab-content" id="settingsContent">

     <div class="tab-pane fade show active" id="account" role="tabpanel" aria-labelledby="account-tab">
         <div class="mt-5">
             <h4>Change Username</h4>
             <form action="/account" method="POST">
                 <div class="row">
                     <div class="col-6">
                         <input type="text" class="form-control" name="newUsername" placeholder="New Username" />
                     </div>
                 </div>
                 <div class="row">
                     <div class="col-6 pb-5 border-bottom">
                        ...