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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){ | |
| 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); | |