My question: when the update from WP (5.9.1) is out, is it then obsolete?

ok

Can i implement the javascript for the normal menu?
I use now the Megamenu and style the submenu new. Works also

sicherheitseinstellungen vom youtube/browser

i have tested several elemnts…. video with lightbox, link with lightbox

Firefox darf diese eingebettete Seite nicht öffnen

Zu Ihrem Schutz erlaubt http://www.youtube.com es Firefox nicht, diese Seite anzuzeigen, wenn sie in eine andere Seite eingebettet ist. Zur Anzeige der Seite muss diese in einem neuen Tab geöffnet werden.

thats are single checkboxes. i think of multiple

an input field from type radio.
and multiple chechboxes are also good

on my installation the error appears. you have access to my site. i have delted my loop-index.php and tested. same error!

no i dont modify anything.

it helps.

but llok at my other topic

found the error.
i have german date format in child overriden
with

add_filter('avf_datepicker_date_placeholder', 'new_date_placeholder');
function new_date_placeholder() {
$placeholder = "dd.mm.yyyy";
return $placeholder;
}
add_filter('avf_datepicker_dateformat', 'new_date_format');
function new_date_format() {
$date_format = "dd.mm.yyyy";
return $date_format;
}

but correct is

 add_filter('avf_datepicker_date_placeholder', 'new_date_placeholder');
function new_date_placeholder() {
$placeholder = "dd.mm.yy";
return $placeholder;
}
add_filter('avf_datepicker_dateformat', 'new_date_format');
function new_date_format() {
$date_format = "dd.mm.yy";
return $date_format;
}

ok. when i change to make small header on fixed header. the class is there.
but is it right?