<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css"> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script> <br><br> <div class="container"> <div class="row"> <form data-toggle="validator" role="form"> <div class="form-group"> <label for="inputName" class="control-label">Name</label> <input type="text" class="form-control" id="inputName" placeholder="Praveen Kumar" required> </div> <div class="form-group"> <label for="inputEmail" class="control-label">Email</label> <input type="email" class="form-control" id="inputEmail" placeholder="Email" data-error="Bruh, that email address is invalid" required> </div> <div class="form-group"> <div class="radio"><label><input type="radio" name="underwear" required>Button 1</label></div> <div class="radio"><label><input type="radio" name="underwear" required>Button 2</label></div> </div> <div class="form-group"> <button type="submit" class="btn btn-primary">Submit</button> </div> </form> </div> </div>