1.5 async和await

<script>
    /* async function getData() {
        var promiseObj = new Promise(function (resolve, reject) {
            setTimeout(function () {
                resolve({
                    msg: '66666'
                })
            }, 2000)
        })
        console.log(1);
        // 用await等待消息，有了结果之后在执行
        var result = await promiseObj;
        console.log(result);
        console.log(2);
    }
    getData();
 */
    // 项目中一般使用一个函数来返回一个promise对象
    function getObj() { 
        var promiseObj = new Promise(function (resolve, reject) {
            setTimeout(function () {
                resolve({
                    msg: '66666'
                })
            }, 2000)
        })
        return promiseObj;
    }
    async function getData2() {
        var result = await getObj();
        console.log(result);
    }
    getData2();
</script>