'use strict';

/* --------------------------------------------------------------
 jquery_extensions.js 2016-06-22
 Gambio GmbH
 http://www.gambio.de
 Copyright (c) 2016 Gambio GmbH
 Released under the GNU General Public License (Version 2)
 [http://www.gnu.org/licenses/gpl-2.0.html]
 --------------------------------------------------------------
 */

(function () {

    'use strict';

    /**
     * Add ":attr" pseudo selector.
     *
     * This selector enables jQuery to use regular expressions for attribute name matching. Although useful,
     * the engine will remove all dependencies to jQuery and thus it must be moved into an external library
     * or file.
     */

    if ($.expr.pseudos.attr === undefined) {
        $.expr.pseudos.attr = $.expr.createPseudo(function (selector) {
            var regexp = new RegExp(selector);
            return function (elem) {
                for (var i = 0; i < elem.attributes.length; i++) {
                    var attr = elem.attributes[i];
                    if (regexp.test(attr.name)) {
                        return true;
                    }
                }
                return false;
            };
        });
    }
})();
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