"animation input"
Bootstrap 4.1.1 Snippet by sumitkumar

<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 ----------> <div class="container"> <form> <div class="group"> <input type="text" required> <span class="highlight"></span> <span class="bar"></span> <label>Name</label> </div> <div class="group"> <input type="text" required> <span class="highlight"></span> <span class="bar"></span> <label>Email</label> </div> </form> </div>
* { box-sizing:border-box; } /* basic stylings ------------------------------------------ */ body { background:url(https://scotch.io/wp-content/uploads/2014/07/61.jpg); } .container { font-family:'Roboto'; width:600px; margin:30px auto 0; display:block; background:#FFF; padding:10px 50px 50px; } h2 { text-align:center; margin-bottom:50px; } h2 small { font-weight:normal; color:#888; display:block; } .footer { text-align:center; } .footer a { color:#53B2C8; } /* form starting stylings ------------------------------- */ .group { position:relative; margin-bottom:45px; } input { font-size:18px; padding:10px 10px 10px 5px; display:block; width:300px; border:none; border-bottom:1px solid #757575; } input:focus { outline:none; } /* LABEL ======================================= */ label { color:#999; font-size:18px; font-weight:normal; position:absolute; pointer-events:none; left:5px; top:10px; transition:0.2s ease all; -moz-transition:0.2s ease all; -webkit-transition:0.2s ease all; } /* active state */ input:focus ~ label, input:valid ~ label { top:-20px; font-size:14px; color:#5264AE; } /* BOTTOM BARS ================================= */ .bar { position:relative; display:block; width:300px; } .bar:before, .bar:after { content:''; height:2px; width:0; bottom:1px; position:absolute; background:#5264AE; transition:0.2s ease all; -moz-transition:0.2s ease all; -webkit-transition:0.2s ease all; } .bar:before { left:50%; } .bar:after { right:50%; } /* active state */ input:focus ~ .bar:before, input:focus ~ .bar:after { width:50%; } /* HIGHLIGHTER ================================== */ .highlight { position:absolute; height:60%; width:100px; top:25%; left:0; pointer-events:none; opacity:0.5; } /* active state */ input:focus ~ .highlight { -webkit-animation:inputHighlighter 0.3s ease; -moz-animation:inputHighlighter 0.3s ease; animation:inputHighlighter 0.3s ease; } /* ANIMATIONS ================ */ @-webkit-keyframes inputHighlighter { from { background:#5264AE; } to { width:0; background:transparent; } } @-moz-keyframes inputHighlighter { from { background:#5264AE; } to { width:0; background:transparent; } } @keyframes inputHighlighter { from { background:#5264AE; } to { width:0; background:transparent; } }

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