Dart? Version 1 was a lot like Javascript/Typescript in one spec (a dynamic language with optional unsound typing). Version 2 uses sound typing, but you can sti

Dart? Version 1 was a lot like Javascript/Typescript in one spec (a dynamic language with optional unsound typing). Version 2 uses sound typing, but you can still let variables unannoted (and the compiler will infer type "dynamic") for scripts.