异步笔试题请写出下面代码的运行结果

类别：js / 日期：2023-03-07 / 浏览：242 / 评论：0

async function async1() {
    console.log('async1 start')
    await async2()
    console.log('async1 end')
}
async function async2() {
    console.log('async2')
}
console.log('scriptstart ')
setTimeout(function () {
    console.log('setTimeout')
}, 0)
async1()
new Promise(function (resolve) {
    console.log('promise1')
    resolve()
}).then(function () {
    console.log('promise2')
})
console.log('script end')