polyfill-modernizr.matchmedia.js

(function (global) {
    'use strict';

    window.matchMedia = window.matchMedia || function (media) {
        if (!Modernizr) {
            throw new Error('Reference Error: Modernizr is undefined');
        }

        return {
            matches: Modernizr.mq(media)
        };
    };
}(window));

polyfill.matchmedia.js

(function (global) {
    'use strict';

    window.matchMedia = window.matchMedia || function (media) {
        
        var direction;
        if (media.indexOf('height')) {
            direction = 'innerHeight';
        } else {
            direction = 'innerWidth';
        }

        var num;
        num = media.replace(/^\D+/g, '');

        var match;
        var minMax;
        if (media.indexOf('min')) {
            if (window.direction > num) {
                match = true;
            } else {
                match = false;
            }
        } else {
            if (window.direction < num) {
                match = true;
            } else {
                match = false;
            }
        }

        return {
            matches: match
        };
    };
}(window));