Promise nesting

promise-nesting.js

Promise = require('bluebird');

promiseOfA.then((a) => {
  return usesAPromisesB(a).then((b) => {
    return usesAAndB(a, b);
  });
});

// or

let promiseOfB = promiseOfA.then((a) => {
  return usesAPromisesB(a);
});

Promise.join(promiseOfA, promiseOfB, (a, b) => usesAAndB(a, b));