代码输出 ~~~ async function async1() { console.log('async1 start'); await async2(); console.log('async1 end'); } async function async2() { console.log('async2'); } console.log('script start'); setTimeout(() => { console.log('setTimeout'); }, 0) async1(); new Promise((resolve) => { console.log('promise1'); resolve(); }).then(() => { console.log('promise2'); }) console.log('script end'); ~~~