Jak na žádost o příspěvek v javascriptu pomocí ajax

ajax post volání

<script>window.onload = function(){
    let aData = {"profile": "developer", "to": "[email protected]"};
	console.log(FormData);
    $.ajax({
        type: "POST",
        url: "/api/saveProfile",
        data: JSON.stringify(aData),
        contentType: "application/json",  
            success: function(){
               alert("Request was successful");
            }
        });
};