Gnome desktop ui element's name

Hello there, I’m looking for an official documentation about the name of the different elements of the gnome desktop. Where can I find such information ? Thanks !

For applications you can look into libadwaita library

$ adwaita-1-demo

For desktop (gnome-shell) you can look into help app (yelp)

GNOME help > Visual overview of GNOME

Although, developer usually go into GNOME gitlab and inspect the source codes themselves.