图文并茂了解event loop执行

event概念就不细讲了；只看面试题；啊～知识分享真的太难了；佩服掘金博客大神，感谢他们的分享

async function f1() {
  console.log(1)
  await f2()
  console.log(2)
}
async function f2() {
  console.log(3)
}
console.log(4)
setTimeout(() => {
  console.log(5)
}, 0)

f1()
new Promise(function (resolve, reject) {
  console.log(6)
  resolve()
}).then(function () {
  console.log(7)
})
console.log(8)

看上述代码，请输入打印顺序；