JavaScript Output: Promise/SetTimeout/Scoping

Promise channing Output

Challenge 1

(async function () {
  console.log(1);
  setTimeout(() => console.log(2), 0)
  Promise.resolve().then(() => console.log(3))
  setTimeout(() => console.log(4), 0)
  console.log(5)
  Promise.resolve().then(() => console.log(6))
  Promise.reject().catch(() => console.log(7))
  console.log(8)
})()

OUTPUT,

Challenge 2

With async/await, it changes the output pattern -

(async function () {
  console.log(1);
  setTimeout(() => console.log(2), 0)
  Promise.resolve().then(() => console.log(3))
  setTimeout(() => console.log(4), 0)
  console.log(5)
  await Promise.resolve().then(() => console.log(6))
  Promise.reject().catch(() => console.log(7))
  console.log(8)
})()

Challenge 3

const promise = new Promise((resolve, reject) => {
    reject(new Error('Some error occurred'));
  })
  promise.catch(error => console.log(error.message));
  promise.catch(error => console.log(error.message));

OUTPUT,

Some error occurred
Some error occurred

Challenge 4

const promise = new Promise((resolve, reject) => {
    reject(new Error('Some…