requestAnimationFrame

Question

What does the code snippet to the right output by console.log?

Snippet

console.log(1)

setTimeout(() => {
  console.log(2)
}, 100)

requestAnimationFrame(() => {
  console.log(3)
})

requestAnimationFrame(() => {
  console.log(4)
  setTimeout(() => {
    console.log(5)
  }, 10)
})

const end = Date.now() + 200;
while (Date.now() < end) {
}

console.log(6)

Source

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