Mixins

Mixins

// Disposable Mixin
class Disposable {
  isDisposed: boolean;
  dispose() {
    this.isDisposed = true;
  }
}
// Activatable Mixin
class Activatable {
  isActive: boolean;
  activate() {
    this.isActive = true;
  }
  deactivate() {
    this.isActive = false;
  }
}
class SmartObject implements Disposable, Activatable {
  constructor() {
    setInterval(() => console.log(this.isActive + " : " + this.isDisposed), 500);
  }
  interact() {
    this.activate();
  }
  // Disposable
  isDisposed: boolean = false;
  dispose: () => void;
  // Activatable
  isActive: boolean = false;
  activate: () => void;
  deactivate: () => void;
}
applyMixins(SmartObject, [Disposable, Activatable]);
let smartObj = new SmartObject();
setTimeout(() => smartObj.interact(), 1000);
function applyMixins(derivedCtor: any, baseCtors: any[]) {
  baseCtors.forEach(baseCtor => {
    Object.getOwnPropertyNames(baseCtor.prototype).forEach(name => {
      derivedCtor.prototype[name] = baseCtor.prototype[name];
    });
  });
}