Introducing Lynx: A High‑Performance Cross‑Platform Framework for Native and Web UI

Scalable, Efficient Delivery of Native Experience

For digital‑native users, native performance is essential; Lynx provides a solution that lets developers write once and run on both mobile native and web, reducing duplication and accelerating delivery.

Empowering the Web Community

Building on the evolution of web‑based cross‑platform tools such as PhoneGap, React Native, and Flutter, Lynx adopts a Web‑first mindset while adding constraints and extensions to support native‑level UI.

Using Standard HTML and CSS

Lynx supports modern CSS features—animations, transitions, selectors, variables, gradients, clipping and masking—allowing developers to leverage familiar web styling for native‑grade interfaces.

Architecture: Main Thread and Background Thread

Lynx separates user scripts into a dedicated main‑thread runtime (PrimJS) for UI‑critical tasks and a background runtime for other code, enabling two key techniques: Instant First‑Frame Rendering (IFR) and Main Thread Script (MTS) for ultra‑responsive interactions.

Open‑Source Release

The engine, built by ByteDance and used extensively in TikTok, is now open‑source on GitHub. The ecosystem includes ReactLynx (the first front‑end framework), Rspeedy/Rspack build tools, module‑federation support, and Lynx for Web, making the platform adaptable to many environments.

Future Outlook

Lynx aims to become a meta‑infrastructure for cross‑platform development, encouraging community contributions and expanding to desktop, TV, and IoT platforms.