Where Customization Begins 

  • Detect Screen Size & Apply CSS

 #26030  by Neuropass
 21 Mar 2013, 15:03
This will format the content differently according to the screen resolution of the user detecting the screen width using the screen.width property and change the stylesheet using jQuery.

Code: Select all    // The first step is to load our base stylesheets, the jQuery library and our javascript.
    <link rel="stylesheet" type="text/css" href="reset.css"/>
    <link rel="stylesheet" type="text/css" href="detect800.css"/>
    <script type="text/javascript" src="jquery.js"></script>
    <script type="text/javascript" src="detect.js"></script>
    <div>The colour of this text will change.</div>
    // We’re going to test if the user screen size is less than 1024 x 768 and if it is, we’ll change the stylesheet.
    //Define the same style in two different sheets. Once for the 1024 x 768 and once for the 800 x 600. Just make something quick and distinctive, for detect800.css I’m adding
    color: #006699;
    font: 24px Georgia, serif;
    // and for detect1024.css:
    color: #df0000;
    font: 24px "Trebuchet MS", sans-serif;
    // We’re going to add a JavaScript alert so the execution will pause until we click OK and we get to see the former style.
    $(document).ready(function() {
    if ((screen.width>=1024) && (screen.height>=768)) {
    alert('Screen size: 1024x768 or larger');
    $("link[rel=stylesheet]:not(:first)").attr({href : "detect1024.css"});
    else {
    alert('Screen size: less than 1024x768, 800x600 maybe?');
    $("link[rel=stylesheet]:not(:first)").attr({href : "detect800.css"});
    // As a selector, we look for the link element with a rel attribute with a value of stylesheet. We’re going to redirect its href to a different stylesheet. Now, since I’m loading a reset stylesheet in the first place, i will add the :not(:first) modifier, so it won’t affect the first element.