Typescript promiseAllObj. Like Promise.all but for objects. Similar to bluebird.props.

promiseAllObj.ts

// Like Promise.all, but for objects of {key: Promise}
const promsieAllObj = async <T>(obj: Record<string, Promise<T>>): Promise<Record<string, T>> => {
  const arr = Object.entries(obj).map(([key, value]) => value.then(res => [key, res]));
  return Object.assign(
    {},
    ...(await Promise.all(arr).then(res => res.map(([k, v]) => ({ [k as string]: v as T }))))
  );
};