复制
1const promise1 = new Promise((resolve, reject) => {
2  setTimeout(() => {
3    resolve("success");
4    console.log("timer1");
5  }, 1000);
6  console.log("promise1里的内容");
7});
8const promise2 = promise1.then(() => {
9  throw new Error("error!!!");
10});
11console.log("promise1", promise1);
12console.log("promise2", promise2);
13setTimeout(() => {
14  console.log("timer2");
15  console.log("promise1", promise1);
16  console.log("promise2", promise2);
17}, 2000);