A delay function that can be used with async-await

await-delay.js

const delay = ms => new Promise(resolve => setTimeout(resolve, ms));

// Sample code using `delay`
const test = async () => {
  const time = () => console.log((new Date).toLocaleTimeString());
  time();
  await delay(1000);
  time();
  await delay(3000);
  time();
};

test();