How do you properly return multiple values from a promise?

Question

I\'ve recently run into a certain situation a couple of times, which I didn\'t know how to solve properly. Assume the following code:

somethingAsync()
  .the         


        

Answer 1

Simply return a tuple:

async add(dto: TDto): Promise {
console.log(`${this.storeName}.add(${dto})`);
return firebase.firestore().collection(this.dtoName)
  .withConverter(this.converter)
  .add(dto)
  .then(d => [d.update(this.id, d.id), d.id] as [any, string])
  .then(x => this.get(x[1]));

}