$(document).ready(() => { $("#registerForm").submit(() => { $.ajax({ type: "POST", url: "/api/register", data: JSON.stringify({ username: $("#username").val(), password: $("#password").val(), inviteToken: $("#inviteToken").val() }), contentType: 'application/json', success: function() { window.location.href = "/index"; }, error: function(xhr) { alert (xhr.responseText); } }) }) });