Simple ES2016 async / await demo

async-await.js

async function (t) {

  // getDataAsync could be any function that returns a Promise

  let aPromise = getDataAsync()
  let a = await aPromise

  // We usually don't assign the promise to a variable before we
  //   `await` it, so this process usually looks like,

  let b = await getDataAsync()

  // The values of `a` and `b` are available. The promises have
  //   been resolved for us by `await` so we don't need to call
  //   `.then(...)`.

  doSomething(a, b)

}