const p1 = new Promise(function (resolve, reject) {
  setTimeout(() => reject(new Error('fail')), 3000)
})

const p2 = new Promise(function (resolve, reject) {
  setTimeout(() => resolve(p1), 1000)
})

p2
  .then(result => console.log(result))
  .catch(error => console.log(error))
// Error: fail

初學Promise，看了阮一峰老師的教程，這里看不懂，為什么p1的狀態(tài)決定p2的狀態(tài)，按我理解不是直接console.log(p1)么