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https://github.com/Hopiu/jquery-mobile.git
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47 lines
No EOL
1.6 KiB
JavaScript
47 lines
No EOL
1.6 KiB
JavaScript
/*
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* jQuery Mobile Framework : a workaround for window.matchMedia
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* Copyright (c) jQuery Project
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* Dual licensed under the MIT or GPL Version 2 licenses.
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* http://jquery.org/license
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*/
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(function( $, undefined ) {
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var $window = $( window ),
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$html = $( "html" );
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/* $.mobile.media method: pass a CSS media type or query and get a bool return
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note: this feature relies on actual media query support for media queries, though types will work most anywhere
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examples:
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$.mobile.media('screen') //>> tests for screen media type
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$.mobile.media('screen and (min-width: 480px)') //>> tests for screen media type with window width > 480px
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$.mobile.media('@media screen and (-webkit-min-device-pixel-ratio: 2)') //>> tests for webkit 2x pixel ratio (iPhone 4)
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*/
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$.mobile.media = (function() {
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// TODO: use window.matchMedia once at least one UA implements it
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var cache = {},
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testDiv = $( "<div id='jquery-mediatest'>" ),
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fakeBody = $( "<body>" ).append( testDiv );
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return function( query ) {
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if ( !( query in cache ) ) {
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var styleBlock = document.createElement( "style" ),
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cssrule = "@media " + query + " { #jquery-mediatest { position:absolute; } }";
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//must set type for IE!
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styleBlock.type = "text/css";
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if ( styleBlock.styleSheet ){
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styleBlock.styleSheet.cssText = cssrule;
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} else {
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styleBlock.appendChild( document.createTextNode(cssrule) );
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}
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$html.prepend( fakeBody ).prepend( styleBlock );
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cache[ query ] = testDiv.css( "position" ) === "absolute";
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fakeBody.add( styleBlock ).remove();
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}
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return cache[ query ];
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};
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})();
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})(jQuery); |