Extends a Class will make losing and corrupted types in a child class. · Issue #42541 · microsoft/TypeScript · GitHub

When we add types on properties base class, if a child class extends this base class, we will lost types and get corrupted behavior. Actually is seem affected by keyof T, i not tested all others types, but this one make coruptions. From

instanceof is broken when class extends Error type · Issue #13965 · microsoft/TypeScript · GitHub

Broken inferred recursive types · Issue #43817 · microsoft/TypeScript · GitHub

playground using inheritance example doesn't run in Edge for some reason · Issue #21597 · microsoft/TypeScript · GitHub

extends` TS error: Inferred type of this node exceeds the maximum length the compiler will serialize with `declaration: true` in `tsconfig` · Issue #16536 · prisma/prisma · GitHub

Support final classes (non-subclassable) · Issue #8306 · microsoft/ TypeScript · GitHub

Incorrect transpiled constructor of derived classes · Issue #12123 · microsoft/TypeScript · GitHub

5.1 regression from 5.0: JavaScript heap out of memory (Type instantiation is excessively deep and possibly infinit) · Issue #54542 · microsoft/ TypeScript · GitHub

Support override keyword on class methods · Issue #2000 · microsoft/ TypeScript · GitHub

Support override keyword on class methods · Issue #2000 · microsoft/ TypeScript · GitHub

BUG [TS2416]: Incorrect error reporting · Issue #42858 · microsoft/ TypeScript · GitHub

Inherited typing for class property initializers · Issue #10570 · microsoft/ TypeScript · GitHub