JENKINS-70913 Remove Prototype Ajax.Request usage from UpdateCenter (#7894)

core/src/main/resources/hudson/model/UpdateCenter/update-center.js

@@ -14,33 +14,39 @@ Behaviour.specify(
 
 function refresh() {
   window.setTimeout(function () {
-    new Ajax.Request("./body", {
-      onSuccess: function (rsp) {
-        var div = document.createElement("div");
-        div.innerHTML = rsp.responseText;
+    fetch("./body", {
+      method: "post",
+      headers: crumb.wrap({}),
+    }).then((rsp) => {
+      if (rsp.ok) {
+        rsp.text().then((responseText) => {
+          var div = document.createElement("div");
+          div.innerHTML = responseText;
 
-        var rows = div.children[0].rows;
-        for (var i = 0; i < rows.length; i++) {
-          var row = rows[i];
-          var target = document.getElementById(row.id);
-          if (target == null) {
-            document.getElementById("log").appendChild(row);
-          } else {
-            var tcell = target.cells[1];
-            var scell = row.cells[1];
-            if (scell.id != tcell.id) {
-              tcell.innerHTML = scell.innerHTML;
-              tcell.id = scell.id;
+          var rows = div.children[0].rows;
+          for (var i = 0; i < rows.length; i++) {
+            var row = rows[i];
+            var target = document.getElementById(row.id);
+            if (target == null) {
+              document.getElementById("log").appendChild(row);
+            } else {
+              var tcell = target.cells[1];
+              var scell = row.cells[1];
+              if (scell.id !== tcell.id) {
+                tcell.innerHTML = scell.innerHTML;
+                tcell.id = scell.id;
+              }
             }
           }
-        }
-        var scheduleDiv = document.getElementById("scheduleRestartBlock");
-        scheduleDiv.innerHTML = div.lastElementChild.innerHTML;
-        Behaviour.applySubtree(scheduleDiv);
-        refresh();
-      },
+          var scheduleDiv = document.getElementById("scheduleRestartBlock");
+          scheduleDiv.innerHTML = div.lastElementChild.innerHTML;
+          Behaviour.applySubtree(scheduleDiv);
+          refresh();
+        });
+      }
     });
   }, 5000);
 }
+
 window.scrollTo(0, 10000);
 refresh();