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media.js
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media.js
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//>>excludeStart("jqmBuildExclude", pragmas.jqmBuildExclude);
//>>description: A workaround for browsers without window.matchMedia
//>>label: Match Media Polyfill
//>>group: Utilities
define( [ "jquery", "./core" ], function( jQuery ) {
//>>excludeEnd("jqmBuildExclude");
(function( $, undefined ) {
/*! 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 ));
// $.mobile.media uses matchMedia to return a boolean.
$.mobile.media = function( q ) {
return window.matchMedia( q ).matches;
};
})(jQuery);
//>>excludeStart("jqmBuildExclude", pragmas.jqmBuildExclude);
});
//>>excludeEnd("jqmBuildExclude");