From fe0ddc5824d4ce64ac377118af04eebc1d0be735 Mon Sep 17 00:00:00 2001
From: Dave <Dave>
Date: Fri, 23 Jan 2026 19:19:54 -0500
Subject: [PATCH] feature/IO-3499-React-19 - Checkpoint

---
 client/src/index.jsx | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/client/src/index.jsx b/client/src/index.jsx
index e19836f19..6a87f770e 100644
--- a/client/src/index.jsx
+++ b/client/src/index.jsx
@@ -16,6 +16,7 @@ import "./utils/CleanAxios";
 // import * as amplitude from "@amplitude/analytics-browser";
 import { PostHogProvider } from "posthog-js/react";
 import posthog from "posthog-js";
+import { StrictMode } from "react";
 
 window.global ||= window;
 
@@ -77,6 +78,18 @@ function App() {
   );
 }
 
-ReactDOM.createRoot(document.getElementById("root")).render(<App />);
+const rootEl = document.getElementById("root");
+
+if (!rootEl) throw new Error('Missing root element: <div id="root" />');
+
+const appTree = import.meta.env.DEV ? (
+  <StrictMode>
+    <App />
+  </StrictMode>
+) : (
+  <App />
+);
+
+ReactDOM.createRoot(rootEl).render(appTree);
 
 reportWebVitals();