Convert wizard es6 files to js

app/assets/javascripts/wizard/lib/ajax.js

@@ -0,0 +1,24 @@
+import { run } from "@ember/runloop";
+import getUrl from "discourse-common/lib/get-url";
+import { Promise } from "rsvp";
+import jQuery from "jquery";
+
+let token;
+
+export function getToken() {
+  if (!token) {
+    token = $('meta[name="csrf-token"]').attr("content");
+  }
+
+  return token;
+}
+
+export function ajax(args) {
+  return new Promise((resolve, reject) => {
+    args.headers = { "X-CSRF-Token": getToken() };
+    args.success = data => run(null, resolve, data);
+    args.error = xhr => run(null, reject, xhr);
+    args.url = getUrl(args.url);
+    jQuery.ajax(args);
+  });
+}