Example of async/await: http://forum.shakacode.com/t/promises-tips-and-articles/302/5?u=justin

async-await.js

var longFn = function(x) {
	return new Promise(function(res, rej) {
      if (x) {	
       setTimeout(res(x), 1000);
      } else {
       rej("ERROR from not passing in a value to longFn"); 
      }
	});
};

async function f(inputToAsync) {
  console.log("f() starting with param: ", inputToAsync);
  let result;
  try { 
    result = await longFn(inputToAsync);
  } catch (err) {
    console.log("THROWING err: " + err);
    throw err;
  }
  return "RETURN VALUE FROM ASYNC function: " + inputToAsync;
}

var p = f("INPUT TO ASYNC FUNCTION");
console.log("1: return value of async function is ", p);

p.then(
  res => console.log("1: FINISHED: got back: " + res)
).catch( 
  err => console.log("1: GOT ERROR: err")
);  
                     

var p = f(false);
console.log("2: return value of async function is ", p);

p.then(
  res => console.log("2: FINISHED: got back: " + res)
).catch( 
  err => console.log("2: GOT ERROR: err")
);