snapshot of https://github.com/jitsi/jitsi-meet.git @ fd1749dd28f4138aa80234fc7f311b19aaffa0e7 (2026-09-15)

react/features/multi-screen/subscriber.web.ts

@@ -0,0 +1,18 @@
+import StateListenerRegistry from '../base/redux/StateListenerRegistry';
+
+import { getSecondScreenSignature, refreshSecondScreens } from './functions.web';
+
+/**
+ * Re-applies the second-screen sources whenever what they should render changes
+ * — most importantly when the active speaker switches (the {@code role: 'stage'}
+ * source resolves to a different track), so the window's {@code srcObject} is
+ * swapped in place without ever re-opening it.
+ */
+StateListenerRegistry.register(
+    /* selector */ state => getSecondScreenSignature(state),
+    /* listener */ (signature, store) => {
+        if (signature) {
+            refreshSecondScreens(store);
+        }
+    }
+);