Problem Statement
Mixins typically use…
Explanation
A mixin takes a base class and returns a new class with extra behavior. It’s composition: `const WithX = <TBase extends Constructor>(Base: TBase) => class extends Base { … }`.
Code Solution
SolutionRead Only
type Ctor<T = {}> = new (...args: any[]) => T;
function WithTimestamp<TBase extends Ctor>(Base: TBase){
return class extends Base { timestamp = Date.now(); };
}
class Model {}
class TimedModel extends WithTimestamp(Model) {}