npm upgrade
Homereact-is 18 → 19
18.3.1 → 19.3.0. What the package's exports lost, renamed or changed between the two releases, from lurq's extraction of both published tarballs.
react-is 19.3.0 removes or renames exports your code may import.
- Removed
- 2
- Renamed
- 0
- Signature changes
- 0
- Types removed
- 0
- Newly deprecated
- 0
- Added
- 0
Does this break your code?
Run this in your project. It compares both releases against the names your code actually imports, locally, with no account and nothing sent to lurq:
npx lurqrun check-upgrade --upgrade react-is@18.3.1..19.3.0
To have your coding agent check upgrades like this before it writes them, connect lurq to Claude Code, Cursor, VS Code or Codex:
npx lurqrun
Removed
Gone at runtime, with no replacement found under another name. Imports of these fail.
- isAsyncModefunction
- isConcurrentModefunction
An export diff shows what a release removed or re-signatured, not behaviour changes: read the changelog for those. Extracted Oct 17, 2026. react-is on lurq.