Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The yearOfWeek accessor property of Temporal.PlainDateTime instances returns an integer representing the year to be paired with the weekOfYear of this date, or undefined if the calendar does not have a well-defined week system. It is calendar-dependent.
The set accessor of yearOfWeek is undefined. You cannot change this property directly.
For general information and more examples, see Temporal.PlainDate.prototype.yearOfWeek.