Run N Promises sequentially, irrespective of whether the previous promise passed or failed.

seqpromise.js

const run = () => +new Date()

let arr = Array.from({length: 100}, run)

arr.reduce((x, y) => {
  x.then(result => {
    console.log(x)
    return y
  }, err => {
    console.error(err)
    return y
  })
})