react-resizable-panels-v4

Building resizable split-pane layouts in Next.js without hydration errors requires an SSR-safe approach using a server-driven defaultLayout and client persistence via onLayoutChanged. This pattern prevents layout shifts during hydration.

The best way to persist resizable panel sizes is using cookie-backed persistence combined with the onLayoutChanged callback. This allows you to save layout state on the client and restore it deterministically on the server.

Yes, react-resizable-panels v4 supports conditional panel mount and unmount. You can manage dynamic layouts using imperative panelRef and groupRef handles alongside hooks like useDefaultLayout.

Yes, you can create nested resizable panel groups for complex multi-pane dashboards. The v4 API supports nesting to build advanced interfaces like code editors or email clients with split-pane views.

To set deterministic default layouts in an SSR environment, use the useDefaultLayout hook to establish a server-driven initial state. This ensures panels render correctly before client-side hydration takes over.

Resizable panel group sizes reset during Next.js route navigation if persistence is not configured. Implementing cookie-backed persistence with onLayoutChanged ensures your layout state is maintained across server transitions.