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feat(deps): update react monorepo to v19 - #1816

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Note

This PR body was truncated due to platform limits.

This PR contains the following updates:

Package Change Age Confidence
react (source) ^18.3.1 → ^19.3.1 age confidence
react (source) 18.3.1 → 19.3.1 age confidence
react-dom (source) ^18.3.1 → ^19.3.1 age confidence
react-dom (source) 18.3.1 → 19.3.1 age confidence

Release Notes

react/react (react)

v19.3.1: 19.3.1 (October 14th, 2026)

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React Server Components

v19.3.0

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New React Features
New React DOM Features
  • browser(): a new react-dom API that returns a usable which errors during server rendering and resolves in the browser. use(browser()) inside a <Suspense> boundary marks a subtree as browser-only without reporting a recoverable error (@​gnoff: #​37143, #​37241)
    • Added an onBrowserBailout option to the react-dom/server APIs to observe when a subtree defers to the browser (@​gnoff #​37193)
Notable changes
All Changes
React
React DOM
React Server
React Server Components

v19.2.9: 19.2.9 (October 14th, 2026)

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React Server Components

v19.2.8: 19.2.8 (July 21st, 2026)

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React Server Components

v19.2.7

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React Server Components

v19.2.6

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React Server Components

v19.2.5

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React Server Components

v19.2.4

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React Server Components

v19.2.3

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React Server Components

v19.2.2

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React Server Components

v19.2.1

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React Server Components

v19.2.0

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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

v19.1.10: 19.1.10 (October 14th, 2026)

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React Server Components

v19.1.9: 19.1.9 (July 21st, 2026)

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React Server Components

v19.1.8

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React Server Components
  • Fixed missing FormData entries in Server Actions which regressed in 19.1.7 ([@​unstubbable](https://redirect.

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📦 Bundle Size Report

Metric Current Previous Change Status
Total (gzip) 240.49 kB 240.49 kB 0 B (0%) 🟢
Total (raw) 665.44 kB 665.44 kB 0 B (0%) 🟢
CSS (gzip) 22.01 kB 22.01 kB 0 B (0%) 🟢
CSS (raw) 114.74 kB 114.74 kB 0 B (0%) 🟢

Size Limits

  • ✅ Total gzipped: 240.49 kB / 350 kB (68.7%)
  • ✅ Total raw: 665.44 kB / 850 kB (78.3%)
  • ✅ CSS gzipped: 22.01 kB / 25 kB (88.1%)

Largest Files (Top 5)

  1. index.esm-wIkXrqU6.js - 11.4 kB (0 B (0%))
  2. styles.css - 11.01 kB (0 B (0%))
  3. index.css - 11.01 kB (0 B (0%))
  4. internals-vBPqpOAQ.js - 6.14 kB (0 B (0%))
  5. hooks-tRFcXUMh.js - 5.77 kB (0 B (0%))
View All Files (307 total)
File Size (gzip) Change
index.esm-wIkXrqU6.js 11.4 kB 0 B (0%)
styles.css 11.01 kB 0 B (0%)
index.css 11.01 kB 0 B (0%)
internals-vBPqpOAQ.js 6.14 kB 0 B (0%)
hooks-tRFcXUMh.js 5.77 kB 0 B (0%)
sdk.gen-D_5dqKZ5.js 5.63 kB 0 B (0%)
index.js 5.6 kB 0 B (0%)
flows/Onboarding/hooks.js 4.67 kB 0 B (0%)
utils-CHvFwoQn.js 4.43 kB 0 B (0%)
FieldSetField-DL8fBWct.js 4.43 kB 0 B (0%)

✅ Bundle size check passed

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Deploy preview for remote-flows ready!

Project:remote-flows
Status: ✅  Deploy successful!
Preview URL:https://remote-flows-qasgtiy8t-remotecom.vercel.app
Latest Commit:c30bfd0

Deployed with vercel-action

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Deploy preview for adp-cost-calculator ready!

Project:adp-cost-calculator
Status: ✅  Deploy successful!
Preview URL:https://adp-cost-calculator-cu1ndv2ed-remotecom.vercel.app
Latest Commit:c30bfd0

Deployed with vercel-action

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Cursor Bugbot has reviewed your changes and found 2 potential issues.

Fix All in Cursor

❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, have a team admin enable autofix in the Cursor dashboard.

Reviewed by Cursor Bugbot for commit c30bfd0. Configure here.

Comment thread package.json
"react": "^18.3.1",
"react-dom": "^18.3.1"
"react": "^19.3.1",
"react-dom": "^19.3.1"

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Peer range drops React 18

High Severity

The react and react-dom peers now require ^19.3.1 only, so React 18 hosts no longer satisfy them. This package is consumed externally, and the feat(deps) title would ship that as a minor without a BREAKING CHANGE note or migration guide.

Fix in Cursor Fix in Web

Triggered by project rule: Code Review Guidelines

Reviewed by Cursor Bugbot for commit c30bfd0. Configure here.

Comment thread pnpm-lock.yaml
react-dom@19.3.1:
resolution: {integrity: sha512-Y0bARz53lhEC1NMCASs0/j+faB/zqt3R8hpvg1e8+61ZVJ4UL0UdC4cBbXfZMcIuhrfgeILTLe+ZeBCavQPtKQ==}
peerDependencies:
react: ^18.3.1

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Flagpack rejects React 19

Medium Severity

react-flagpack@2.0.6 still peers react at ^16.8 || ^17 || ^18, so installing this library on React 19 can fail peer resolution. Cost Calculator estimation results import Flag from that package.

Additional Locations (2)
Fix in Cursor Fix in Web

Reviewed by Cursor Bugbot for commit c30bfd0. Configure here.

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