javascript+jquery로 데이터보낼때 예시

let index = {
    init: function () {
        $("#btn-save").on("click", () => {
            this.save();
        });
    },

    save: function () {
        let data = {
            username: $("#username").val(),
            password: $("#password").val(),
            email: $("#email").val()
        };
        $.ajax({
            type: "POST",
            url: "/auth/joinProc",
            data: JSON.stringify(data),
            contentType: "application/json; charset=utf-8",
            dataType: "json"
        }).done(function (resp){
            if (resp.status === 500) {
                alert("회원가입에 실패하였습니다");
            }
            else{
                alert("회원가입에 성공하였습니다");
                location.href="/";
            }
        }).fail(function (error){
            alert(JSON.stringify(error));
        });

    },
};

index.init();