CODEWITHSUNDEEP
typescript
great stone
great stone

Reputation: 45

Typescript: create a method, returning the type of which was determined depending on the class

I want to set a method in the parent class, the return value of which would be determined depending on the type of the value field.

class A {
   protected value: string;
   public getValue(): this['value'] { .... }
}

class B extends A {
   protected value: number;
}

new B().getValue() - should be a number

How can I do this? I tried to do it as shown above, but it doesn't work

Upvotes: 0

Views: 48

Answers (1)

rishabhsharma
rishabhsharma

Reputation: 71

You can use generic classes/ functions from typescript to solve this.

class A<T> { value: T; getValue(): T }

You can read about it here: https://www.typescriptlang.org/docs/handbook/generics.html

Upvotes: 1

Related Questions