Fix ajax for challenge creation

[vchess.git] / client / src / utils / ajax.js

diff --git a/client/src/utils/ajax.js b/client/src/utils/ajax.js
index 01ea849..5b46078 100644 (file)
--- a/client/src/utils/ajax.js
+++ b/client/src/utils/ajax.js
@@ -17,15 +17,16 @@ 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)
                {