Bluebird.Promise cancellation

cancellationPromise1.js

import Promise from 'bluebird';

Promise.config({
  cancellation: true,
});

console.log('Experiment A!!!');

const rootPromise1 = new Promise((resolve, reject, onCancel) => {
  console.log('A: rootPromise1 started');

  setTimeout(() => {
    resolve();
  }, 100);

  onCancel(() => {
    console.log('A: rootPromise1 cancelled');
  });

  return Promise.resolve()
    .then(() => new Promise((resolve, reject, onCancel) => {
      console.log('A: subPromise1 started');

      setTimeout(() => {
        resolve();
      }, 100);

      onCancel(() => {
        console.log('A: subPromise1 cancelled');
      });
    }))
    .then(() => new Promise((resolve, reject, onCancel) => {
      console.log('A: subPromise2 started');

      setTimeout(() => {
        resolve();
      }, 100);

      onCancel(() => {
        console.log('A: subPromise2 cancelled');
      });
    }));
});

rootPromise1.cancel();

cancellationPromise2.js

import Promise from 'bluebird';

Promise.config({
  cancellation: true,
});

console.log('Experiment B!!!');
const rootPromise2 = Promise.resolve()
  .then(() => new Promise((resolve, reject, onCancel) => {
    console.log('B: subPromise1 started');

    setTimeout(() => {
      resolve();
    }, 100);

    onCancel(() => {
      console.log('B: subPromise1 cancelled');
    });
  }))
  .then(() => new Promise((resolve, reject, onCancel) => {
    console.log('B: subPromise2 started');

    setTimeout(() => {
      resolve();
    }, 100);

    onCancel(() => {
      console.log('B: subPromise2 cancelled');
    });
  }));

setTimeout(() => {
  rootPromise2.cancel();
}, 150);