After Synchronous Loop inside the Event Loop

afterSynchronousLoop.js

const afterSynchronousLoop =
  queueMicrotask ||
  setImmediate ||
  (function () {
    if (Promise) {
      return function (fn) {
        Promise.resolve().then(fn);
      };
    }
    return function (fn) {
      setTimeout(fn, 0);
    };
  })();

afterSynchronousLoop(() => console.log("Hello, World!"));
console.log("Goodbye, World!");