Bootstrap 3 Template

This is a simple Twitter Bootstrap 3 template. You can fork it to get a ready to use Bootstrap 3 fiddle.

HTML

<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css">
<script src="https://cdn.rawgit.com/nnattawat/flip/master/dist/jquery.flip.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<div class="jumbotron">
    <h1>Jumbotron with form</h1>
        <form>
           <div class="input-group input-group-lg">
               <input type="text" class="form-control" placeholder="Username">
                  <span class="input-group-addon">@</span>
           </div> 
        </form>
  </div>

CSS

/* Latest compiled and minified CSS included as External Resource*/

/* Optional theme */
@import url('//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap-theme.min.css');

body {
    margin: 10px;
}

.input-group-lg > .form-control, .input-group-lg > .input-group-addon, .input-group-lg > .input-group-btn > .btn {
    height: 49px;
}

JavaScript

/* Latest compiled and minified JavaScript included as External Resource */