extend Promise.all() in order to accept plain object

promiseAllObject.js

const assign = (obj, key, value) => Object.assign({}, obj, { [key]: value });

const promiseAllObject = obj => {
  const keys = Object.keys(obj);
    
  return Promise.all(Object.values(obj))
    .then(results => results.map((val, i) => [keys[i], val]))
    .then(results => results.reduce((res, val) => assign(res, ...val), {}));
}

// Example:

const delay = (cb, time) => new Promise((res) => setTimeout(() => res(cb()), time));

const promises = {
  foo: delay(() => 'foo', 1000),
  bar: delay(() => 'bar', 2000),
};

promiseAllObject(promises).then(console.log)
/* 2s after...
{
  bar: "bar",
  foo: "foo"
}
*/