async 和 await 是 ES7 引入的新语法,能够更加不便的异步操作
async 关键字用在函数上 (async 函数的返回值是 promise 实例对象)
await 必须跟 async 同时应用。
例子:
// 获取数据 1
getDatas1() {return new Promise((resolve, reject) => {
this.$http
.get(window.SITE_CONFIG.apiURL + "/static/queryStatic", {
params: {dictType: "accept_promotion",},
})
.then((res) => {
let result = res.body.data;
this.ycslArr1 = result;
resolve("嘿嘿嘿 1")
})
.catch(() => {});
});
},
// 获取数据 2
getDatas2() {return new Promise((resolve, reject) => {
this.$http
.post(window.SITE_CONFIG.apiURL + "/service656", {
machineCode: "SfJjeyP0xmnS6h8R",
url: "/power/getItemCountByOnlineDepth/1.0",
postdata: {},})
.then((res) => {let result = JSON.parse(res.body.result).data;
this.wbsdData2.pop();
resolve("嘿嘿嘿 222");
})
.catch(() => {});
});
},
async query() {let ret1 = await this.getDatas1();
var ret2 = await this.getDatas2();
console.log("ret1????", ret1, ret2); // 嘿嘿嘿 1, 嘿嘿嘿 222
},