Get URL params (querystring), returns object

params.js

// Get URL params (querystring)
if (!location.params) {
  Object.defineProperty(location, 'params', {
    enumerable: false,
    get: function () {
      var search = location.search;
      var all = /(?:[?&;])(?:[^&;#]+)/g;
      var pair = /[?&;]([^&;=#]+)=?([^&;#]*)/;
      var results = {};

      search.match(all).forEach(function (param) {
        var match = pair.exec(param);
        results[match[1]] = match[2];
      });

      return results;
    }
  })
}