Multiple inheritance workarounds

Question

I'm trying to discover a pattern for combining multiple interfaces into one abstract class. Presently I can combine multiple interfaces via implements, but an interface cannot declare a constructor. When I must introduce a constructor I'm forced to use an abstract class. When I use a abstract class I must re-declare the entire composite interface! Surely I'm missing something?

interface ILayerInfo {
    a: string;
}

interface ILayerStatic {
    b(): string;
}

class Layer implements ILayerInfo, ILayerStatic {
    constructor(info: ILayerInfo);
    a: string;
    b(): string;
}

ANSWER: Use new:

interface Layer extends ILayerInfo, ILayerStatic {
    new(info: ILayerInfo);
}

// usage: new Layer({ a: "" });

Answer 1

Here's a sample of a solution for inheriting multiple interfaces:

type ShowAllWithTypography =  TypographyClampProps & ShowAllProps

interface Props extends ShowAllWithTypography