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

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

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

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

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

true extends false · Issue #28654 · microsoft/TypeScript · GitHub

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

typesVersions should not be affected by `types: ` · Issue #28304 · microsoft/TypeScript · GitHub

TSC2417 - Incorrectly extending other class (which is not the case) · Issue #18643 · microsoft/TypeScript · GitHub

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

Module not found when extending a class otherwise same code without extending no error · Issue #51260 · microsoft/TypeScript · GitHub

Error TS2506 when class extends class in module with same name · Issue #3602 · microsoft/TypeScript · GitHub

TSC2417 - Incorrectly extending other class (which is not the case) · Issue #18643 · microsoft/TypeScript · GitHub