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Using media queries in JavaScript (based around http://adactio.com/journal/5429/)
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| #js-mediaquery { | |
| overflow: hidden; | |
| width: 1px; | |
| height: 1px; | |
| position: absolute; | |
| top: -999999em; | |
| left: auto; | |
| clip: rect(1px 1px 1px 1px); /* IE6, IE7 */ | |
| clip: rect(1px, 1px, 1px, 1px); | |
| } | |
| #js-mediaquery:after { | |
| content: '320'; | |
| display: none; | |
| } | |
| @media only screen and (min-width: 768px) { | |
| #js-mediaquery:after { | |
| content: '768'; | |
| } | |
| } | |
| @media only screen and (min-width: 1024px) { | |
| #js-mediaquery:after { | |
| content: '1024'; | |
| } | |
| } |
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| <!DOCTYPE html> | |
| <html class="no-js"> | |
| <head> | |
| <meta http-equiv="X-UA-Compatible" content="IE=edge" /> | |
| <title>Media queries in JavaScript</title> | |
| <script>(function(H){H.className=H.className.replace(/\bno-js\b/,'js')})(document.documentElement)</script> | |
| <link rel="stylesheet" href="css.css"> | |
| </head> | |
| <!--[if lt IE 8]><body class="old-ie"> <![endif]--> | |
| <!--[if gt IE 7]><!--><body> <!--<![endif]--> | |
| <div id="js-mediaquery"></div> | |
| <script src="script.js"></script> | |
| </body> | |
| </html> |
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| console = window.console || {}; | |
| console.log = window.console.log || function(log){alert(log);}; | |
| var PWCC = window.PWCC || {}; | |
| PWCC.site = function(window, document) { | |
| var media_query = { | |
| elem: document.getElementById("js-mediaquery"), | |
| active: 0 | |
| }; | |
| // DOC.ready event | |
| detect_media_query(); | |
| // resize event | |
| if (window.addEventListener) { | |
| window.addEventListener('resize', detect_media_query, false); | |
| } | |
| //functionality | |
| function detect_media_query() { | |
| var changed = false, | |
| active = media_query.active, | |
| detected = 320, //default | |
| style; | |
| if ( window.getComputedStyle ) { | |
| style = window.getComputedStyle(media_query.elem,':after').getPropertyValue('content'); | |
| if (style.indexOf("320") !=-1) { | |
| detected = 320; | |
| } | |
| else if (style.indexOf("768") !=-1) { | |
| detected = 768; | |
| } | |
| else if (style.indexOf("1024") !=-1) { | |
| detected = 1024; | |
| } | |
| } | |
| media_query.active = detected; | |
| if ( detected != active ) { | |
| // run faux change event | |
| on_media_query_change(); | |
| } | |
| } | |
| function on_media_query_change() { | |
| console.log( media_query.active ); | |
| } | |
| }(this, this.document); |
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