angular - How to use chain calls Promise?

Now in .then section I all another promise http request:

.then(result => { this.service().then(data => {}); });

Is it a correct way to use chained promises?

Answer

Almost! You need to return the promise in the function, either like this:

.then(result => { return this.service().then(data => {}); });

or like this:

.then(result => this.service().then(data => {}));