structuredAttrs is enabled

trying https://registry.npmjs.org/@fullcalendar/core/-/core-6.1.20.tgz
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed
100 415.0k 100 415.0k   0      0  4.01M      0                              0