typescript-design-patterns | Designs Pattern In TypeScript | Architecture library

There are several problems with this approach.

Classes are first-class citizens in TypeScript, alternative approaches to inheritance can make type safety much less straightforward.

Object.create is low-level tool, it isn't a good idea to use it unless you know what you're doing and why. The actual mistake here is that wrong prototype was chosen (Employee instead of Employee.prototype), so name property refers to function name property, which is read-only and shouldn't be reassigned. A proper way to implement clone would be: