<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="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <h3>Progress bar animation on load</h3> <p>Bootstrap, CSS-only</p> <div class="progress"> <div class="progress-bar progress-bar-success" style="width: 25%;"></div> </div> <div class="progress"> <div class="progress-bar progress-bar-info" style="width: 50%;"></div> </div> <div class="progress"> <div class="progress-bar progress-bar-warning" style="width: 80%;"></div> </div> <div class="progress"> <div class="progress-bar progress-bar-danger" style="width: 100%;"></div> </div> </div>

.progress .progress-bar { animation-name: animateBar; animation-iteration-count: 1; animation-timing-function: ease-in; animation-duration: .4s; } @keyframes animateBar { 0% {transform: translateX(-100%);} 100% {transform: translateX(0);} }