typescript variable with generic extending

Question

I have a predefined interface:

export declare interface Type<T> extends Function {
    new (...args: any[]): T;
}

I would like to have a class attribute that constraint the generic type. Something like this:

public componentType: Type<any extends MyComponentType>;

Is it possible ? Because I did not find the solution on Typescript doc and I can't find a syntax that is working.

Thanks.

Maybe stackoverflow.com/questions/26652179/… can give you an answer — Mathieu Guyot
– Mathieu Guyot, Commented Feb 18, 2020 at 16:03

rkesters · Accepted Answer · 2020-02-18 17:30:15Z

0

Does this do what you want

export declare interface Type<A,T extends A = A> extends Function {
    new (...args: any[]): T;
}

class MyComponentType {

}

class MyComponentType2 extends MyComponentType{

}

class foo {
    public componentType: Type<MyComponentType>;

    constructor() {
        this.componentType = MyComponentType2;
    }
}

answered Feb 18, 2020 at 17:30

rkesters

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MHogge · Accepted Answer · 2020-02-19 08:24:39Z

0

The answer is the comment made by @Josh Wulf on the original post.

public componentType: Type<MyComponentType>

answered Feb 19, 2020 at 8:24

MHogge

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