code: function(key, queryString) {
        var queryString = (queryString || (main.location ? main.location.search : null) || '').substring(1)
        return inject(queryString.split('&'), null, function(value, pair){
          parts = pair.split('=')
          return parts[0] == key ? parts[1].replace(/%20|\+/gmi, ' ') : value
        })
      }
docs: Query against the current query strings keys
  or the queryString specified.
  
  @param  {string} key
  @param  {string} queryString
  @return {string, null}
  @api private