SOURCE

// 按顺序依次发送三个请求
const p1 = () => new Promise((resolve) => setTimeout(() => {
    resolve("p1");
}, 1000))
const p2 = () => new Promise((resolve) => setTimeout(() => {
    resolve("p2");
}, 1000))
const p3 = () => new Promise((resolve) => setTimeout(() => {
    resolve("p3");
}, 1000))


const fn = async () => {
    const res1 = await p1()
    console.log(res1)
    const res2 = await p2()
    console.log(res2)
    const res3 = await p3()
    console.log(res3)

    // console.log(res1, res2, res3)
}
fn()