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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 */
/*! NOTE: If you're already including a window.matchMedia polyfill via Modernizr or otherwise, you don't need this part */
(function(w){
"use strict";
w.matchMedia = w.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
};
};
}( w.document ));
}( this ));
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