axios.post('getsomething').then(
?? ?res => {
?? ??? ?// 進(jìn)行一些操作
?? ?}
)

// 假設(shè)這是我們要請(qǐng)求的數(shù)據(jù)
function getSomething(n) {
    return new Promise(resolve => {
        // 模擬1s后返回?cái)?shù)據(jù)
        setTimeout(() => resolve(222), 1000);
    });
}
function requestSomething() {
    console.log(111);
    getSomething().then(res => console.log(res));
    console.log(333);
}
requestSomething() //這個(gè)時(shí)候會(huì)輸出 111，333，222
// 如果想要等數(shù)據(jù)返回后再執(zhí)行后面的代碼，那么就要使用 async/await
async function requestSomething() {
    console.log(111);
    // 這時(shí)something會(huì)等到異步請(qǐng)求的結(jié)果回來后才進(jìn)行賦值，同時(shí)不會(huì)執(zhí)行之后的代碼
    const something = await getSomething();
	console.log(something)
    console.log(333);
}
requestSomething() //這個(gè)時(shí)候會(huì)輸出 111，222，333

 axios.defaults.baseURL = 'http://localhost:3000';
        async function queryData() {
            var ret = await axios.get('/data');
            var ret1 = await axios.get('/data1');
            var ret2 = await axios.get('/data2');
            return [ret, ret1, ret2];
        }
        console.log(queryData());

	axios.get('http://localhost:3000/adata')
    .then(function(ret){
      // 注意data屬性是固定的用法，用于獲取后臺(tái)的實(shí)際數(shù)據(jù)
      // console.log(ret.data)
      console.log(ret)
    })

  		// async總結(jié) 
        //1, 有async標(biāo)識(shí)的函數(shù)稱之為 異步函數(shù),
        //2, 有async關(guān)鍵字出現(xiàn),await可以不出現(xiàn)
        //3, 有await出現(xiàn),async必須出現(xiàn)
        axios.defaults.baseURL = 'http://localhost:3000';
        async function queryDate() {
            // await的作用就是將異步函數(shù)變成同步操作
            var ret = await axios.get('/adata')
            console.log(ret.data);
        }
        queryDate();

 axios.defaults.baseURL = 'http://localhost:3000/';
    async function queryData() {
      var info = await axios.get('async1');
      console.log(info.data);
      var ret = await axios.get('async2?info=' + info.data);
      return ret.data;
    }
    queryData().then(function (data) {
      console.log(data)
    })