<link href="//netdna.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//netdna.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <h3>Bootstrap Grid Visualizer - Shoelace</h3> <p> <a href="http://www.shoelace.io/#cc41c60ea7449064f06f" target="_blank"><img src="http://i.imgur.com/tZP3duv.png?1" class="pull-right" alt=""> </a> </p> <p> It's often difficult (if not IMPOSSIBLE) to visualize how parameters of the <a href="http://getbootstrap.com/css/#grid-example-mixed">Bootstrap grid</a> system work across multiple devices. <br>The container below contains classes for many devices. To fully understand it, click on image and visualize with <a href="http://www.shoelace.io/#cc41c60ea7449064f06f" target="_blank">Shoelace.com</a>. <p>Best viewed: <a href="http://bootsnipp.com/iframe/3kxVp" target="_blank">full screen</a> </p> </div> </div> <hr> <div class="container"> <div class="row"> <h3>Sample Bootstrap Columns</h3> <div class="col-sm-1 col-md-1"> <div class="alert alert-success" role="alert"><small>col-sm-1 col-md-1</small> </div> </div> <div class="col-sm-4 col-md-3"> <div class="alert alert-success" role="alert">col-sm-4 col-md-3</div> </div> <div class="col col-sm-7 col-md-8"> <div class="alert alert-info" role="alert">col col-sm-7 col-md-8</div> </div> </div> <div class="row"> <div class="col-sm-1 col-lg-3"> <div class="alert alert-danger" role="alert">col-sm-1 col-lg-3</div> </div> <div class="col-sm-1 col-lg-3"> <div class="alert alert-danger" role="alert">col-sm-1 col-lg-3</div> </div> <div class="col-sm-1 col-lg-3"> <div class="alert alert-danger" role="alert">col-sm-1 col-lg-3</div> </div> <div class="col-sm-9 col-lg-3"> <div class="alert alert-danger" role="alert">col-sm-9 col-lg-3</div> </div> </div> <p> <br><a href="http://validator.w3.org/check?uri=http%3A%2F%2Fbootsnipp.com%2Fiframe%2F3kxVp" target="_blank"><small>HTML</small>⁵</a> </p> </div>