TypeScript - Mixin Class

mixin.ts

type Constructor<T = {}> = new (...args: any[]) => T;

//#region Mixins

// A mixin that adds a property
function Timestampable<TBase extends Constructor>(Base: TBase)
{
    return class extends Base
    {
        timestamp = Date.now();
    };
}

// a mixin that adds a property and methods
function Activatable<TBase extends Constructor>(Base: TBase)
{
    return class extends Base
    {
        isActivated = false;

        activate()
        {
            this.isActivated = true;
        }

        deactivate()
        {
            this.isActivated = false;
        }
    };
}

//#endregion Mixins