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<!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="/lib/bootstrap.min.css"> <script src="/lib/jquery-1.12.2.min.js"></script> <script src="/lib/bootstrap.min.js"></script> </head> <body> <div class="container"> <h2>Example</h2> <p>Resize this page to see how the text below changes:</p> <h1 class="visible-xs">This text is shown only on an EXTRA SMALL screen.</h1> <h1 class="visible-sm">This text is shown only on a SMALL screen.</h1> <h1 class="visible-md">This text is shown only on a MEDIUM screen.</h1> <h1 class="visible-lg">This text is shown only on a LARGE screen.</h1> </div> </body> </html>