AngularJS $q style deferred from a native Promise, in TypeScript

Deferred.ts

class Deferred<T = any> {
  resolve: (value?: T | PromiseLike<T>) => void;
  reject: (reason?: any) => void;

  promise = new Promise<T>((resolve, reject) => {
    this.resolve = resolve;
    this.reject = reject;
  });

  then = this.promise.then.bind(this.promise);
  catch = this.promise.catch.bind(this.promise);
}