es6 async await
const getData = () => new Promise(resolve => setTimeout(() => resolve("data"), 1000)) async function test() { const data = await getData() console.log('data: ', data); const data2 = await getData() console.log('data2: ', data2); return 'success' } // 这样的一个函数 应该再1秒后打印data 再过一秒打印data2 最后打印success test().then(res => console.log(res))