Docs now explain more cases where compiler adoption should be incremental.
Frontend changelog digest
May 4 - May 10, 2026. Useful releases, risky migrations, and noisy updates from the Frontend channel.
Frontend updates in 2026-w19
Production build fixes target route generation and CSS ordering.
Incremental rebuilds are faster in projects with many imported CSS files.
Added new utilities: container size, scrollbar (width, colors, gutter), zoom, tab, and expanded @variant support for stacked and compound variants.
The beta includes narrower inference for common conditional patterns.
Introduced GA release separating alerts into Monitors and Alerts for finer-grained tracking.
Patched high‑severity vulnerabilities including DoS via server components, middleware/proxy bypasses, SSRF in WebSocket upgrades, and cache poisoning in React Server Component responses.
Address multiple high, moderate, and low severity security advisories (DoS, SSRF, XSS, cache poisoning, and middleware proxy bypass)
Patched multiple high‑severity security vulnerabilities (DoS, SSRF, proxy bypass, cache poisoning, XSS) across Server Components, Middleware, and Image Optimization.
Patched high‑severity vulnerabilities such as denial‑of‑service, proxy bypass, SSRF, and cache exhaustion across server components, middleware, and caching layers.
Enhanced type safety (hardening) for React Server Components.
Strengthen type safety for React Server Components.
Hardens TypeScript types for React Server Components.
Application Metrics reach General Availability with high‑cardinality, trace‑connected data.
Introduces Snapshots in Early Access for image storage, diffing, and CI integration
Cross-Event Querying is now generally available