What does the ‘override’ keyword enforce that was not enforced before TypeScript 4.3?

Question

TypeScript Professional — Medium

What does the ‘override’ keyword enforce that was not enforced before TypeScript 4.3?

Accepted Answer

The 'override' keyword in TypeScript 4.3 enforces that a method marked as such must exist in a base class; any attempt to rename or delete the base method will result in a compile error.