@atlassian/aui/lib/js/aui/internal/mediaQuery.js

Atlassian User Interface Framework

(function (global, factory) {
    if (typeof define === "function" && define.amd) {
        define(['module', 'exports'], factory);
    } else if (typeof exports !== "undefined") {
        factory(module, exports);
    } else {
        var mod = {
            exports: {}
        };
        factory(mod, mod.exports);
        global.mediaQuery = mod.exports;
    }
})(this, function (module, exports) {
    /**
     * Inspired by matchMedia() polyfill
     * https://github.com/paulirish/matchMedia.js/blob/953faa1489284655ed9d6e03bf48d39df70612c4/matchMedia.js
     */

    'use strict';

    Object.defineProperty(exports, "__esModule", {
        value: true
    });
    exports.default = mediaQuery;
    function mediaQuery(mq) {
        if (window.matchMedia) {
            return window.matchMedia(mq).matches;
        }

        // fallback support for <=IE9 (remove this code if we don't want to support IE9 anymore)
        var style = document.createElement('style');
        style.type = 'text/css';
        style.id = 'testMedia';
        style.innerText = '@media ' + mq + ' { #testMedia { width: 1px; } }';
        document.head.appendChild(style);
        var info = window.getComputedStyle(style, null);
        var testMediaQuery = info.width === '1px';
        style.parentNode.removeChild(style);
        return testMediaQuery;
    };
    module.exports = exports['default'];
});
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