matchMedia.js?q1zbq1

js imaginaire.ru collected 2026-09-27 22:07:44 UTC 971 bytes, 36 lines download raw bytes

1/*! matchMedia() polyfill - Test a CSS media type/query in JS. Authors & copyright (c) 2012: Scott Jehl, Paul Irish, Nicholas Zakas. Dual MIT/BSD license */
2
3window.matchMedia = window.matchMedia || (function( doc, undefined ) {
4
5  "use strict";
6
7  var bool,
8      docElem = doc.documentElement,
9      refNode = docElem.firstElementChild || docElem.firstChild,
10      // fakeBody required for <FF4 when executed in <head>
11      fakeBody = doc.createElement( "body" ),
12      div = doc.createElement( "div" );
13
14  div.id = "mq-test-1";
15  div.style.cssText = "position:absolute;top:-100em";
16  fakeBody.style.background = "none";
17  fakeBody.appendChild(div);
18
19  return function(q){
20
21    div.innerHTML = "&shy;<style media=\"" + q + "\"> #mq-test-1 { width: 42px; }</style>";
22
23    docElem.insertBefore( fakeBody, refNode );
24    bool = div.offsetWidth === 42;
25    docElem.removeChild( fakeBody );
26
27    return {
28      matches: bool,
29      media: q
30    };
31
32  };
33
34}( document ));
35
36

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