Sleep that passes data

sleep.js

const sleep = (dur) => (data) =>
  new Promise((res) =>
    setTimeout(() => res(data), dur)
  )

const yay = () => Promise.resolve('sleepy')
  .then(sleep(1000))
  .then((status) => console.log(`I am so ${status}!`))

yay()
// -> I am so sleepy!