index.js

console.log('timeout0')

new Promise((resolve, reject) => {
  resolve('resolved')
}).then((res) => console.log(res))

new Promise((resolve, reject) => {
  setTimeout(() => {
    resolve('timeout resolved')
  })
}).then((res) => console.log(res))
process.nextTick(() => {
  console.log('nextTick1')
  process.nextTick(() => {
    console.log('nextTick2')
  })
})

process.nextTick(() => {
  console.log('nextTick3')
})

console.log('sync')

setTimeout(() => {
  console.log('timeout2')
}, 0)