I am new to the Dart Programming language and I am having problem locating where I can learn the current Syntax of the Dart language as regards things like CONSTRUCTORS, CLASSES, FUNCTIONS, VARIABLES and so on. My visit to the following is not yielding the result I need : https://dart.dev/guides ; https://dart.dev/tutorials ; https://pub.dev/packages/dartdoc and many others of the "dart.dev family" websites.
Please note, using https://dartpad.dev/? to run code syntaxes I see on other tutorial sites, indicates that such code styles (or Syntaxes) are outdated. So I need where, I can follow the latest updates.
My visit to hyperkill.org shows that they are not treating Dart programming for now, therefore any suggestion of other site with updated code styles is welcome. Thank you