mvc ajax unobtrusive before submit .net core

@page@model IndexModel<form method="post" data-ajax="true" data-ajax-method="post" data-ajax-complete="completed">    Name: <input type="text" name="name" /><br>    <input type="submit"/></form>@section scripts{     <script src="~/lib/jquery-ajax-unobtrusive/jquery.unobtrusive-ajax.min.js"></script>    <script>        completed = function (xhr) {            alert(`Hi ${xhr.responseText}!`);        };    </script>}