Next.js Loading Lab

Proxy (middleware) vs Loading vs Streaming

proxy:disabled

Entrance

Wikipedia Summary Viewer

Optimistic Transition

Wikipedia Summary

Search a topic

Enter a keyword and open the summary page. The UI is identical across modes—only the navigation/rendering strategy differs.

mode: Optimistic Transition

Tip: try a proper noun (city, mountain, framework…).

Examples:

Lab tip: enable proxy + set 2000–3000ms delay to feel the difference.