四、Promise根据id去发送http请求

.then

<script>
        var http01 = Promise.resolve(1001);
        var http02 = Promise.resolve("detail");
        http01.then(res=>{
            console.log(res)
            return res;
        }).then(id=>{
            /* 得到id值发送http请求 */
            http02.then(res=>{
                console.log("detail")
            })
        })
    </script>

await

<script>
        var http01 = Promise.resolve(1001);
        var http02 = Promise.resolve("detail");
        async function show(){
            var id = await http01;
            console.log(id);
            /* 根据id去发送http请求 */
            var detail = await http02;
            console.log(detail)
        }
        show()
    </script>