A simple library for adding a searchObject parameter to global location object.

SearchObject.js

/**
 * A simple library for adding a searchObject parameter to global location object.
 * The script supports IE7+ and the normal browsers
 * @copyright Semen Kamenetskiy <skamenetskiy@live.com>
 * @link https://gist.github.com/skamenetskiy/398a7512960e827b4ab2
 */

(function (Window, History, Location, _objectName, _prefix, _states) {

    'use strict';

    /**
     * Parse the query string
     * @returns {_parse|SearchObject}
     * @private
     */
    function _parse() {
        var a, pair, pairs, query = Location.search.substring(1);
        for (a in this) {
            if (this.hasOwnProperty(a)) {
                delete this[a]
            }
        }
        if (query.length > 0) {
            pairs = query.split('&');
            for (a = 0; a < pairs.length; a++) {
                pair = pairs[a].split('=');
                this[pair[0]] = decodeURIComponent(pair[1])
            }
        }
        return this
    }

    /**
     * Main SearchObject constructor
     * @constructor
     * @type {SearchObject}
     */
    function SearchObject() {
        /**
         * Current SearchObject instance
         * @type {SearchObject}
         */
        var $this = this;

        /**
         * State change events handler
         * @private
         */
        function _onChangeState() {
            _parse.call($this)
        }

        // Check if history api is supported
        if (History.pushState) {
            /**
             * Attach state change events
             */
            _states.forEach(function (state) {
                var _lowerState = state.toLowerCase();
                if (History[state]) {
                    // Save a copy of the original state event
                    History[_prefix + state] = History[state];
                    // Override original state event
                    History[state] = function () {
                        History[_prefix + state].apply(History, arguments);
                        Window.dispatchEvent(new CustomEvent(_lowerState));
                    }
                }
                Window.addEventListener(_lowerState, _onChangeState)
            })
        }
    }

    /**
     * Initialize SearchObject within location
     * @type {_parse|SearchObject}
     */
    Location[_objectName] = _parse.call(new SearchObject)

})(
    // Global object
    window,

    // History object
    history,

    // Location object
    location,

    // Object name
    'searchObject',

    // Override method prefix
    '__',

    // Override states
    [
        'pushState',
        'replaceState',
        'popState'
    ]
);

SearchObject.min.js

/*
 Semen Kamenetskiy <skamenetskiy@live.com>
 @link https://gist.github.com/skamenetskiy/398a7512960e827b4ab2
*/
(function(e,d,f,k,g,l){function h(){var c,a,b;a=f.search.substring(1);for(c in this)this.hasOwnProperty(c)&&delete this[c];if(0<a.length)for(b=a.split("&"),c=0;c<b.length;c++)a=b[c].split("="),this[a[0]]=decodeURIComponent(a[1]);return this}f[k]=h.call(new function(){function c(){h.call(a)}var a=this;d.pushState&&l.forEach(function(b){var a=b.toLowerCase();d[b]&&(d[g+b]=d[b],d[b]=function(){d[g+b].apply(d,arguments);e.dispatchEvent(new CustomEvent(a))});e.addEventListener(a,c)})})})(window,history,
location,"searchObject","__",["pushState","replaceState","popState"]);