[Snyk] Upgrade org.webjars.npm:react from 16.10.2 to 19.2.7

[mhill-os]

Snyk has created this PR to upgrade org.webjars.npm:react from 16.10.2 to 19.2.7.

ℹ️ Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

---

• The recommended version is 29 versions ahead of your current version.

• The recommended version was released 22 days ago.

Breaking Change Risk

Notice: This assessment is enhanced by AI.

---

Important

• Warning: This PR contains a major version upgrade, and may be a breaking change.
• Check the changes in this PR to ensure they won't cause issues with your project.
• This PR was automatically created by Snyk using the credentials of a real user.

---

Note: You are seeing this because you or someone else with access to this repository has authorized Snyk to open upgrade PRs.

For more information:

• 🧐 View latest project report
• 📜 Customise PR templates
• 🛠 Adjust upgrade PR settings
• 🔕 Ignore this dependency or unsubscribe from future upgrade PRs

[mhill-os]

This is a major upgrade across three significant versions of React (16 → 17 → 18 → 19), introducing substantial breaking changes, new architectural patterns, and requiring a multi-stage migration effort. Direct upgrade is not feasible and will require significant code refactoring.

Key Breaking Changes by Version:

React 17: The "Stepping Stone"

• Event Delegation Change: Events are no longer attached to the document but to the React root container. This was intended to make gradual upgrades safer but can affect code that relies on document-level event listeners.
• New JSX Transform: Removes the need for import React from 'react' in every file, which may require build tool updates.

React 18: Introduction of Concurrency

• New Root API: ReactDOM.render is deprecated. You must switch to the new createRoot API to use React 18, which opts your application into the new concurrent renderer.
• Automatic Batching: State updates are now automatically batched more aggressively (e.g., inside promises and timeouts), which can change application behavior and break code that relied on synchronous re-renders.
• Stricter Strict Mode: Introduces new checks to help prepare for concurrent features, which may reveal new issues in development.

React 19: API Modernization and Removals

• Removal of Deprecated APIs: Support for PropTypes and string refs has been completely removed. Their usage will be ignored or cause errors.
• ref is now a prop: The forwardRef API is often no longer necessary, as ref can be passed down like a regular prop. This requires refactoring existing forwardRef usage.
• New Features: Introduces powerful features like Actions and the use() hook, which simplify async operations and data fetching but represent a new paradigm to learn.

Recommendation:
This upgrade should be treated as a major project, not a routine dependency bump. A direct jump from v16 to v19 is highly likely to fail. We recommend a staged migration:

1. Modernize: Refactor legacy class components to function components with Hooks.
2. Upgrade to v17: Address the event delegation and JSX transform changes.
3. Upgrade to v18: Implement the createRoot API and thoroughly test the application for issues arising from automatic batching and concurrency.
4. Upgrade to v19: First, upgrade to React 18.3 to see deprecation warnings for v19. Then, remove all uses of PropTypes, string refs, and refactor forwardRef implementations before moving to v19.

Notice 🤖: This content was augmented using artificial intelligence. AI-generated content may contain errors and should be reviewed for accuracy before use.

[mhill-os]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues
✅	Licenses	0	0	0	0	0 issues

💻 Catch issues earlier using the plugins for VS Code, JetBrains IDEs, Visual Studio, and Eclipse.