fullcalendar - Showing week number in title bar

Question

Is it possible to show the week number in fc-toolbar-title? The default title shows "25 – 30 jan. 2021" and I would like to add " - Week 4" or dynamically the value set by the parameters weekNumbers and weekText.

The following shows "maandag 25 – zaterdag 30 januari 2021", so the week number is still missing:

titleFormat: {
   month: 'long',
   year: 'numeric',
   day: 'numeric',
   weekday: 'long',
   week: 'short'
 }

https://fullcalendar.io/docs/date-formatting

question from:https://stackoverflow.com/questions/65933701/showing-week-number-in-title-bar

Answer 1

Found the reason why in the documentation: "This flag ('week') cannot be combined with any other flags!". But why?!