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| /*! matchMedia() polyfill - Test a CSS media type/query in JS. Authors & copyright (c) 2012: Scott Jehl, Paul Irish, Nicholas Zakas. Dual MIT/BSD license */ | |
| window.matchMedia = window.matchMedia || (function( doc, undefined ) { | |
| "use strict"; | |
| var bool, | |
| docElem = doc.documentElement, | |
| refNode = docElem.firstElementChild || docElem.firstChild, | |
| // fakeBody required for <FF4 when executed in <head> | |
| fakeBody = doc.createElement( "body" ), | |
| div = doc.createElement( "div" ); | |
| div.id = "mq-test-1"; | |
| div.style.cssText = "position:absolute;top:-100em"; | |
| fakeBody.style.background = "none"; | |
| fakeBody.appendChild(div); | |
| return function(q){ | |
| div.innerHTML = "­<style media=\"" + q + "\"> #mq-test-1 { width: 42px; }</style>"; | |
| docElem.insertBefore( fakeBody, refNode ); | |
| bool = div.offsetWidth === 42; | |
| docElem.removeChild( fakeBody ); | |
| return { | |
| matches: bool, | |
| media: q | |
| }; | |
| }; | |
| }( document )); | |