fetch方法ajax请求

<script>
    let bt = document.querySelector("input");
    let mydiv = document.querySelector("div");
    let xhr = "null";
    // fetch为全局对象的方法，非js库
    bt.onclick = function () {
        fetch("http://localhost:8000/", {
            method: "post",
            headers: {
                name: "lilee"
            },
            body: "password=999&name=wang"

        }).then(function (r) {
            return r.text();
        }).then((r) => {
            console.log(r);
        })
    }

</script>