求解一道promise笔试题
let promise1 = Promise.resolve()
.then(res => console.log(1))
.then(res => console.log(2))
let promise2 = new Promise(resolve => {
setTimeout(() => {
console.log(6)
resolve()
})
}).then(res => console.log(3))
async function main() {
console.log(4)
console.log(await Promise.all([promise2, promise1]))
console.log(5)
return { obj: 5 }
}
let promise3 = Promise.resolve()
.then(res => console.log(8))
.then(res => console.log(9))
console.log(typeof main())
碰到了一道前端promise的笔试题，有点绕，想不明白，有哪个大佬能讲解一下吗？🤣🤣
运行结果如下：
我还在畏畏缩缩准备八股算法