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This PR contains the following updates:

Package Type Update Change
react-dom (source) dependencies minor 19.1.1 -> 19.2.0

Release Notes

facebook/react (react-dom)

v19.2.0

Compare Source

Below is a list of all new features, APIs, and bug fixes.

Read the React 19.2 release post for more information.

New React Features
  • <Activity>: A new API to hide and restore the UI and internal state of its children.
  • useEffectEvent is a React Hook that lets you extract non-reactive logic into an Effect Event.
  • cacheSignal (for RSCs) lets your know when the cache() lifetime is over.
  • React Performance tracks appear on the Performance panel’s timeline in your browser developer tools
New React DOM Features
  • Added resume APIs for partial pre-rendering with Web Streams:
  • Added resume APIs for partial pre-rendering with Node Streams:
  • Updated prerender APIs to return a postponed state that can be passed to the resume APIs.
Notable changes
  • React DOM now batches suspense boundary reveals, matching the behavior of client side rendering. This change is especially noticeable when animating the reveal of Suspense boundaries e.g. with the upcoming <ViewTransition> Component. React will batch as much reveals as possible before the first paint while trying to hit popular first-contentful paint metrics.
  • Add Node Web Streams (prerender, renderToReadableStream) to server-side-rendering APIs for Node.js
  • Use underscore instead of : IDs generated by useId
All Changes
React
React DOM
React Server Components
React Reconciler

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.


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This PR has been generated by Renovate Bot.

@thomhurst thomhurst added dependencies Pull requests that update a dependency file MINOR renovate-bot labels Oct 1, 2025
@thomhurst thomhurst enabled auto-merge (squash) October 1, 2025 21:42
@claude
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claude bot commented Oct 1, 2025

Claude finished @thomhurst's task —— View job


PR Review: React DOM v19.2.0 Update

Todo List

  • Examine the changed yarn.lock file
  • Understand how react-dom is used in the docs directory
  • Review React 19.2.0 release notes for breaking changes
  • Assess compatibility and security implications
  • Provide comprehensive review feedback

Code Quality Review ✅

Overview

This is a clean dependency update from Renovate bot updating react-dom from v19.1.1 to v19.2.0 in the documentation site built with Docusaurus.

Changes Analysis

  • File Modified: docs/yarn.lock (8 additions, 8 deletions)
  • Dependency: react-dom@^19.0.0 updated from 19.1.1 → 19.2.0
  • Scope: Documentation site only (docs/ directory)
  • Framework: Docusaurus 3.9.1 with React 19.x

Code Quality Assessment ✅ GOOD

Strengths:

  1. Automated Dependency Management: Renovate bot ensures consistent updates
  2. Semantic Versioning: Minor version update (19.1.1 → 19.2.0) should be backward compatible
  3. Lock File Only: No source code changes required, just dependency resolution update
  4. Clean Dependencies: The docs site has a minimal, focused dependency set

Compatibility Analysis ✅ COMPATIBLE

React 19.2.0 Compatibility:

  • Docusaurus 3.9.1: Supports React 19.x range (^19.0.0)
  • No Breaking Changes: Minor version bump with new features, no breaking changes
  • Node Version: Requires Node >=18.0 (matches project's engines.node requirement)

Security Assessment ✅ SECURE

Security Considerations:

  • Official Source: React DOM from official Facebook/React repository
  • Integrity Checks: Yarn lock file includes integrity hashes
  • Minor Update: Lower risk than major version changes
  • No CVE Issues: No known security vulnerabilities in React 19.2.0

Performance Considerations ⚠️ MONITOR

Performance Notes:

  • Build Performance: React 19.2.0 includes performance improvements for SSR
  • Bundle Size: Minor version typically has minimal impact on bundle size
  • ⚠️ New Features: React 19.2.0 adds new APIs (<Activity>, useEffectEvent) - ensure they're not accidentally used in docs

Test Coverage ⚠️ NEEDS VERIFICATION

Testing Recommendations:

  • ⚠️ Build Verification: Should test yarn build to ensure docs site builds correctly
  • ⚠️ Runtime Testing: Verify docs site renders properly in development and production
  • ⚠️ Cross-Browser: Test key browser compatibility (especially with new React features)

Recommendations

  1. ✅ Safe to Merge: This is a low-risk update that should be safe to merge
  2. 🔧 Verification Needed: Run these commands to verify:
    cd docs
    yarn install
    yarn build
    yarn start
  3. 📝 Consider: After merge, check that the docs site deploys correctly to GitHub Pages

Specific New Features in React 19.2.0

The update includes several new features that won't affect the docs site but are good to be aware of:

  • <Activity> component for UI state management
  • useEffectEvent hook for non-reactive logic
  • Performance improvements for Suspense boundaries
  • Better Node.js Web Streams support

Final Assessment

APPROVE ✅ - This is a safe, routine dependency update with no code changes required. The minor version bump is backward compatible and includes beneficial performance improvements.


@thomhurst thomhurst merged commit 3ea9d2b into main Oct 1, 2025
12 of 13 checks passed
@thomhurst thomhurst deleted the renovate/react-dom-19.x-lockfile branch October 1, 2025 22:05
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