allsettled

gistfile1.txt

const allSettled = (promises) => {
  return Promise.all(
    promises.map( 
      (promise) => {
        const res = (value) => {
          return { state: 'resolved', value: value }
        }
        const rej = (reason) => {
          return { state: 'rejected', reason: reason }
        }

        return promise.then(res, rej)
    })
  )
}