code: function (selector, context) {
      if (typeof selector === 'string') {
        if (context) {
          var cont;
          if (context.jquery) {
            cont = context[0];
            if (!cont) {
              return context;
            }
          } else {
            cont = context;
          }
          return $(cont.querySelectorAll(selector));
        }
  
        return $(document.querySelectorAll(selector));
      }
  
      return $(selector, context);
    }
docs: private Fast Selector wrapper, returns jQuery object. Only use where getElementById is not available.