Response 对象

    <button>得到所有的省份数据</button>
    <script>
        let req;
        function getRequestInfo() {
            if (!req) {
                const url = "http://101.132.72.36:5100/api/local";
                req = new Request(url, {});
                console.log(req);
            }
            return req.clone(); //克隆一个全新的request对象，配置一致
        }
        async function getProvinces() {
            // const resp = await fetch(getRequestInfo())
            const resp = new Response(`[
                {"id":1, "name":"北京"},
                {"id":2, "name":"天津"}
            ]`, {
                ok: true,
                status: 200
            })
            const result = await getJSON(resp);
            console.log(result)
        }
        async function getJSON(resp) {
            const json = await resp.json();
            return json;
        }
        document.querySelector("button").onclick = function() {
            getProvinces();
        }
    </script>