async + await

async.md

asynctest.js

function foo() {
  return 'bar'
}

async function afoo() {
  return 'bar'
}

async function main() {
  console.log('foo()')
  console.log(foo())
  console.log('\r\n')
  console.log('await foo()')
  console.log(await foo())
  console.log('\r\n')
  console.log('afoo()')
  console.log(afoo())
  console.log('\r\n')
  console.log('await afoo()')
  console.log(await afoo())
}

main()

output:

$ node asynctest.js
foo()
bar


await foo()
bar


afoo()
Promise { 'bar' }


await afoo()
bar