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/*! matchMedia() polyfill - Test a CSS media type/query in JS. Authors & copyright (c) 2012: Scott Jehl, Paul Irish, Nicholas Zakas, David Knight. Dual MIT/BSD license */

window.matchMedia || (window.matchMedia = function() {
    "use strict";

// For browsers that support matchMedium api such as IE 9 and webkit
    var styleMedia = (window.styleMedia || window.media);

// For those that don't support matchMedium
    if (!styleMedia) {
        var style       = document.createElement('style'),
            script      = document.getElementsByTagName('script')[0],
            info        = null;

style.type  = 'text/css';
        style.id    = 'matchmediajs-test';

if (!script) {
          document.head.appendChild(style);
        } else {
          script.parentNode.insertBefore(style, script);
        }

// 'style.currentStyle' is used by IE <= 8 and 'window.getComputedStyle' for all other browsers
        info = ('getComputedStyle' in window) && window.getComputedStyle(style, null) || style.currentStyle;

styleMedia = {
            matchMedium: function(media) {
                var text = '@media ' + media + '{ #matchmediajs-test { width: 1px; } }';

// 'style.styleSheet' is used by IE <= 8 and 'style.textContent' for all other browsers
                if (style.styleSheet) {
                    style.styleSheet.cssText = text;
                } else {
                    style.textContent = text;
                }

// Test if media query is true or false
                return info.width === '1px';
            }
        };
    }

return function(media) {
        return {
            matches: styleMedia.matchMedium(media || 'all'),
            media: media || 'all'
        };
    };
}());