JS syncing promises code sample

syncing_promises.js

# https://twitter.com/josh_cheek/status/1377767258601181189
node -e '
const sleep = n => new Promise(resolve => setTimeout(resolve, n))

!async function() {
  const start = Date.now()
  const val1  = sleep(1000).then(() => console.log({ line: 5, at: Date.now()-start }))
  const val2  = sleep(1500).then(() => console.log({ line: 6, at: Date.now()-start }))
  const val3  = sleep(500 ).then(() => console.log({ line: 7, at: Date.now()-start }))
  await Promise.all([val1, val2, val3]) // <-- IS THERE ANYTHING BETTER THAN THIS YET?!?!!?!?
  console.log({ line: 9, at: Date.now()-start })
}()'