import params from "../parameters"; //for server URL
+// TODO: replace by fetch API ?
+// https://www.sitepoint.com/xmlhttprequest-vs-the-fetch-api-whats-best-for-ajax-in-2019/
+
// From JSON (encoded string values!) to "arg1=...&arg2=..."
function toQueryString(data)
{
export function ajax(url, method, data, success, error)
{
let xhr = new XMLHttpRequest();
- if (typeof(data) === "function") //no data
+ if (data === undefined || typeof(data) === "function") //no data
{
error = success;
success = data;
data = {};
}
+ if (!success)
+ success = () => {}; //by default, do nothing
if (!error)
error = errmsg => { alert(errmsg); };
-
xhr.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200)
{