<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <h1>The floating label</h1> <div class="user-input-wrp"> <br/> <input type="text" class="inputText" required/> <span class="floating-label">Your email address</span> </div>

.user-input-wrp { position: relative; width: 50%; } .user-input-wrp .inputText{ width: 100%; outline: none; border:none; border-bottom: 1px solid #777; } .user-input-wrp .inputText:invalid { box-shadow: none !important; } .user-input-wrp .inputText:focus{ border-color: blue; border-width: medium medium 2px; } .user-input-wrp .floating-label { position: absolute; pointer-events: none; top: 18px; left: 10px; transition: 0.2s ease all; } .user-input-wrp input:focus ~ .floating-label, .user-input-wrp input:not(:focus):valid ~ .floating-label{ top: 0px; left: 10px; font-size: 13px; opacity: 1; }