- Backported bug fixes for core and Turbopack, including adapter output handling, server actions in standalone mode, and layout segment optimization.
- Updated documentation: Core Changes post‑release amendments and fixed broken Activity Patterns demo link in the preserving UI state guide.
- Improved Turbopack with lazy metadata require, respect for {eval:true} in worker thread constructors, and a fix for the webpack loader runner layer.
ReactJS changelog digest
Mar 16 - Mar 22, 2026. Useful releases, risky migrations, and noisy updates from the ReactJS channel.
No matching updates in this bucket.
ReactJS updates in 2026-w12
- Add LRU disk cache and images.maximumDiskCacheSize option to next/image (feature).
- Fix pages router to restore Content‑Length and ETag headers for /next/data/ JSON responses (bugfix).
- Backport bug fixes without including pending canary features (minor).
- Fixed multiple Node.js extension bugs: added disabled process stubs, AES‑128 key/IV validation, improved DNS compatibility, robust process.title handling, async write callback fix, reserved‑device path handling, IPv6 multicast interface ...
- Implemented a select fallback on macOS to prevent failures
- Added graceful shutdown via SIGTERM for watch and optimized WebIDL dictionary converters
- Add Vite 8 support and skip full reload for server‑only modules in @tailwindcss/vite
- Improve canonicalization handling (calc(var) expressions, large spacing values, empty‑list bug) and fix crashes related to @property rules
- Prevent crashes when candidate classes contain prototype properties
- Added cloneable resource registry for structured clone, upgraded V8 to 146.8.0 with foreground task ownership, and introduced auto‑detection of CJS vs ESM in Deno eval.
- Expanded Node.js compatibility layer with new APIs (MIMEType, ChildProcess improvements, IPv6 multicast, FileHandle support, TLS fixes) and added CPU profiler flamegraph generation.
- Fixed numerous runtime panics, module loading issues, signal handling, structuredClone support, and applied performance optimizations across core, NAPI, and web extensions.
- Provides Windows installation instructions for Bun v1.3.11.
- Announces upgrade path and links to the release notes.
- Credits 15 contributors for the release.
- Backported bug fixes from the canary branch.
- Patched HTTP proxy to prevent request smuggling (CVE-2026-29057).
- Acknowledged contributions from @ztanner.
- Fixed multiple security vulnerabilities (CVE‑2026‑27977‑27980, CVE‑2026‑29057) and prevented request smuggling and unsafe websocket connections.
- Resolved hanging streaming fetch calls, ensured maxPostponedStateSize compliance, and applied server‑action transforms to node modules in route handlers.
- Added LRU disk cache and configurable maximumDiskCacheSize to next/image.
- Added custom configuration options for uptime monitors
- Allows users to define criteria for what constitutes a successful check
- Added alert creation capability to Metrics open beta
- Users can now define and receive alerts based on metric data