Implementation of interfaces typescript

Question

interface A {
(obj? : any) : any;
func1() : void;
func2() :void;
}

How do I write a class B that would implement A? How would I implement the parametrized constructor?

Possible duplicate of Implementing TypeScript interface with bare function signature plus other fields — toskv
– toskv, Commented Dec 30, 2015 at 20:21
The variable needs a typedef. And so when I mention that it's of any particular type, either of type A or of type"any" I get errors — Amol Agrawal
– Amol Agrawal, Commented Dec 30, 2015 at 22:02

Guillaume · Accepted Answer · 2015-12-31 15:34:02Z

1

An interface cannot, by definition, contain a constructor. You have to move it in your implemented class :

interface A {
    func1(): void;
    func2(): void;
}

class B implements A {
    constructor(obj? : any) {

    }

    func1() {

    }

    func2() {

    }
}

answered Dec 31, 2015 at 15:34

Guillaume

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