小编yuq*_*ang的帖子

new Promise(resolve => {
    new Promise(resolve1 => {
        console.log(1)
        resolve1()
      })
      .then(() => {
        console.log(2)
      })
      .then(() => {
        console.log(3)
      })
    resolve()
  })
  .then(() => {
    console.log(4)
  })