fix: Make index.tsx HMR compatible (#19660)

Fixes #19657
vaadin · Jul 3, 2024 · a8c89b4 · a8c89b4
1 parent ba36f2e
commit a8c89b4
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/flow-server/src/main/resources/com/vaadin/flow/server/frontend/index-react.tsx b/flow-server/src/main/resources/com/vaadin/flow/server/frontend/index-react.tsx
@@ -19,4 +19,8 @@ function App() {
     return <RouterProvider router={router} />;
 }
 
-createRoot(document.getElementById('outlet')!).render(createElement(App));
+const outlet = document.getElementById('outlet')!;
+let root = (outlet as any)._root ?? createRoot(outlet);
+(outlet as any)._root = root;
+root.render(createElement(App));
+