fix: add root cache existence check when returning data (#7873)

HerbertsVaadin · web-flow · commit 725469d66658 · 2025-08-20T12:13:45.000+03:00
diff --git a/vaadin-grid-flow-parent/vaadin-grid-flow/src/main/resources/META-INF/resources/frontend/gridConnector.js b/vaadin-grid-flow-parent/vaadin-grid-flow/src/main/resources/META-INF/resources/frontend/gridConnector.js
@@ -931,7 +931,7 @@
           if ((cache[root] && cache[root][page]) || page < lastRequestedRange[0] || +page > lastRequestedRangeEnd) {
             delete rootPageCallbacks[page];
 
-            if (cache[root][page]) {
+            if (cache[root] && cache[root][page]) {
               // Cached data is available, resolve the callback
               callback(cache[root][page]);
             } else {
