async.js

const sleep = (ms) => {
  return new Promise((resolve) => {
    setTimeout(resolve, ms);
  });
};

const queryDb = async (success) => {
  await sleep(3000);
  if (!success) {
    throw new TypeError();
  }
  console.log("database queried");
};

const init = async () => {
  console.log("before");
  await queryDb(true);
  console.log("after");

  console.log("before 2");
  await queryDb(false);
  console.log("after 2");
};

init();
// before
// database queried
// after
// before 2
// /home/myazici/async.js:10
//     throw new TypeError();
//           ^
//
// TypeError
//     at queryDb (/home/myazici/async.js:10:11)
//     at async init (/home/myazici/async.js:21:3)