Fix live chart connection with Reflex 0.10

news/526.bugfix.md

@@ -0,0 +1 @@
+Connect the XY chart namespace explicitly when Reflex 0.10 pre-creates the shared Socket.IO manager with auto-connect disabled, restoring live chart rendering.

package.json

@@ -8,6 +8,8 @@
   },
   "devDependencies": {
     "playwright": "1.61.1",
+    "socket.io": "4.8.4",
+    "socket.io-client": "4.8.4",
     "typescript": "^7.0.2",
     "vite": "^8.1.5"
   },

python/reflex_xy/assets/XYChart.jsx

@@ -83,6 +83,11 @@ function xySocket() {
   });
   sharedSocket.on("connect", () => dbg("xy namespace connected"));
   sharedSocket.on("connect_error", (e) => dbg("xy connect_error", String(e)));
+  // Reflex 0.10 pre-creates the shared manager with autoConnect: false.
+  // Activate this namespace explicitly; io() inherits the manager's setting
+  // even when the app plane has already opened its transport. An active
+  // legacy socket may already have its CONNECT packet in flight.
+  if (!sharedSocket.active) sharedSocket.connect();
   return sharedSocket;
 }