The Art of Typing in TypeScript Classes

I am working with an interface or abstract class in TypeScript, and I have numerous classes that implement or extend this interface/class. My goal is to create an array containing the constructors of all these subclasses, while still ensuring that the array's type is defined as the interface/superclass. Is there a way to achieve this?

For example, if I define:

export interface Section {
    somePropName: string;
}

or:

export class AbstractSection {
    somePropName: string;
}

And then have:

arrayOfClasses: any[] = [
    SectionSubclass1,
    SectionSubclass2,
    SectionSubclass3,
    SectionSubclass4,
    SectionSubclass5,
];

Is it possible to specify a type for arrayOfClasses other than just any[]? Ideally, I would like to be as precise as possible. While in languages like ActionScript you could use Vector.<Class>, and in Haxe you could use Array<Class>, in TypeScript it seems more challenging to achieve such specificity.

Answer №1

To keep track of classes:

arrayOfClasses: Array<typeof AbstractSection> = [...];

If you prefer storing instances of classes or interface implementations:

arrayOfClasses: AbstractSection[] = [...];

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