typescript restrict count of object's properties

Question

Is it possible to restrict the count of object properties, say I want to restrict object have only one string propery (with any name), I can do:

{[index: stri         


        

Answer 1

Most likely no. The best solution that comes to my mind is wrapping an Object (or Map) with you custom class with methods set(key: string, val: any) and get(key: string) that can disallow adding new items to the underlying collection under certain circumstances.