第 10 题：常见异步笔试题，请写出代码的运行结果
请写出下面代码的运行结果
js
async function async1() {
console.log("async1 start");
await async2();
console.log("async1 end");
}
async function async2() {
console.log("async2");
}
console.log("script start");
setTimeout(function () {
console.log("setTimeout");
}, 0);
async1();
new Promise(function (resolve) {
console.log("promise1");
resolve();
}).then(function () {
console.log("promise2");
});
console.log("script end");参考答案：
js
// script start
// async1 start
// async2
// promise1
// script end
// async1 end
// promise2
// undefined
// setTimeout