mob_condjs.js Example File

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 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
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 ** This file is part of the Qt WebKit module of the Qt Toolkit.
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 window.onload = function() {
     var msg = 'JavaScript thinks you are viewing this page with a ';
     if ( isDesign('desktop') ) {
         msg += 'full desktop browser';
     }
     else if ( isDesign('touch') ) {
         msg += 'touch-based mobile browser';
     }
     else if ( isDesign('mobile') ) {
         msg += 'non-touch mobile browser';
     }
     else {
         msg = window.styleMedia.matchMedium;
     }
     document.getElementById('js').innerHTML = msg;
 };

 function isDesign(str) {
     var design;
     if (matchesMedia('only screen and (min-device-width: 481px)')) {
         design = 'desktop';
     }
     else if (matchesMedia('only screen and (max-device-width: 480px)')) {
         design = 'touch';
     }
     else if (matchesMedia('handheld')) {
         design = 'mobile';
     }
     return str == design;
 }

 function matchesMedia(query) {
     if (!!window.matchMedia)
         return window.matchMedia(query).matches;
     if (!!window.styleMedia && !!window.styleMedia.matchMedium)
         return window.styleMedia.matchMedium(query);
     if (!!window.media && window.media.matchMedium)
         return window.media.matchMedium(query);
     return false;
 }