Broken calendar

[kamuffe]

Bug Description

Hi Stefan.

After updating FullCalendar from 6.2.2 to 6.3.1 the following things are broken:

• weekday translations are not correct anymore
• snapduration (configured as 00:05) takes no effect
• in general it seams that all options which were set initially don't work

With the same release we updated Vaadin from 24.8.1 to 24.8.6. But we reverted Vaadin an the issues persist. So the Vaadin version seems not related.

Example Code

The calendar is configured like the following:

fullCalendar.setLocale( Locale.GERMANY );
setViewType( CalendarViewImpl.TIME_GRID_WEEK );
fullCalendar.setFirstDay( DayOfWeek.MONDAY );
fullCalendar.setTimezone( Timezone.getSystem() );

The systems runs in Europe/Berlin
I also added the following:

fullCalendar.addBrowserTimezoneObtainedListener( event ->
{
	logger.info( "Timezone retrieved from Client: {}", event.getTimezone() );
	fullCalendar.setTimezone( event.getTimezone() );
} );

Which prints:
Timezone retrieved from Client: Timezone{clientSideValue='Europe/Berlin', zoneId=Europe/Berlin}

The day headlines should printed in german localization which was the case before the update.

Might be related to #203 where you mentioned lifecycle issues?

Afterwards at some point I transfered the element from Lit to a normal HTML Element, which led to some change in the lifecycle and init process. This broke my previous options change.

Screenshots

[stefanuebe]

I tested the mentioned settings in the 24 BasicDemo.java with Vaadin 24.8.7 and the latest state of main. It works for me.

fullCalendar.setSnapDuration("00:05");
fullCalendar.setNowIndicatorShown(true);
fullCalendar.setLocale(Locale.GERMANY);
fullCalendar.changeView(CalendarViewImpl.TIME_GRID_WEEK);
//        fullCalendar.setFirstDay(DayOfWeek.MONDAY);
fullCalendar.setTimezone(Timezone.getSystem());

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Regarding the localization settings: Using your sample correctly sets the locale and timezone as expected (I do not even need to manually override the first day of week)

I explicitly set the Locale to US before starting the application, and the calendar defaults to UTC, so when I do not apply your settings the calendar shows english names and 2 hours earlier as the "now" indicator.

public static void main(String[] args) throws Throwable {
    Locale.setDefault(Locale.US);
    SpringApplication.run(Application.class, args);
}

17:33, German time

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Also 5 minute slot based snapping works.

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I assume you had double checked by deleting the usual candiates (node_modules, generated frontend files, etc)? Can you give me some more details about your setup?