wrapper that makes an asynchronous service run sequentially in the order it was called

Setup

npm i -S sequenced-promise

const sequencedPromise = require('sequenced-promise')

const delay = (time, msg = '') => new Promise((resolve, reject) => setTimeout(() => {
  if (msg.toString().startsWith('err')) return reject(new Error(msg))
  return resolve(msg)
}, time))
const sequencedLog = sequencedPromise(delay)

Example 1

sequencedLog(600, 1).then(console.log, console.log)
sequencedLog(500, 2).then(console.log, console.log)
sequencedLog(400, 3).then(console.log, console.log)
delay(1200).then(() => consolePromise(100, 4).then(console.log, console.log))

1
2
3
4

Example 2

sequencedLog(600, 1).then(console.log, console.log)
sequencedLog(500, 'err2').then(console.log, console.log)
sequencedLog(400, 3).then(console.log, console.log)
delay(1200).then(() => consolePromise(100, 4).then(console.log, console.log))

1
err2
err2
4