My favorite from this week is json-render. Looks like the technology made a full circle: from the backend driven UIs we came to the LLM driven UIs. Now the requirements to a good design system are even higher.
Article
Deep dive into React's Transition APIs for text editors—explains how useDeferredValue can deprioritize non-critical UI updates like preview panes; practical example with React ProseMirror showing how to keep the main editor snappy while secondary views catch up later.
Library&tools
Remotion allows users to create videos from code. It can be really handy for generation videos in some pipelines. Or to generate simple presentations without using complex video editing software.
New library from the Vercel team that allows to render JSON responses from LLM into the React components. LLM-driven UI!
All-in-one TypeScript framework for building AI agents and applications—includes workflows, RAG, memory, MCP, and evals; comes with a local dev server, observability dashboard, and cloud deployment. 20.5K+ GitHub stars and growing fast. Now stable version 1.0.
High-performance diff library for arrays and objects with streaming support for large datasets—zero dependencies, move detection, and top-tier benchmarks (10k items in ~2ms); useful for state comparison and data synchronization.
Full-featured ORM supporting Postgres, MySQL, SQLite, Oracle, MS SQL, and even Cloudflare D1—rich querying model, Active Record pattern, and no code generation needed for IntelliSense; works in browser too via Express plugin.
TypeScript CSS API with compile-time validation—compose design systems using variables, selectors, and themes; generates static CSS at build time with optional runtime for dynamic variants. Framework agnostic and works with Vite.
Other
Collection of pure CSS optical illusions by Alvaro Montoro on CodePen—demonstrates what you can achieve with creative CSS without any JavaScript; fun inspiration for pushing the boundaries of styling.