宏微任务，代码输出顺序

宏微任务，代码输出顺序，答案见评论区

async function async1() {
    console.log(1);
    await async2(); 
    console.log(2);
}
async function async2() {
    console.log(3);
}
async1();
setTimeout(() => console.log(4), 0);
new Promise(resolve => {
    resolve();
    console.log(5);
}).then(() => {
    console.log(6);
    Promise.resolve().then(()=>{
    console.log(7);
    });
});
console.log(8);