code: function(url) {
      var dir;
      if (typeof url === "string" && url) {
        dir = url.split("#")[0].split("?")[0];
        dir = url.slice(0, url.lastIndexOf("/") + 1);
      }
      return dir;
    }
docs: Get the URL path's parent directory.
  
  @returns String or `undefined`
  @private