Dev Tools · 2h ago
React 19’s Unstable APIs Create ESLint Headaches for Dev Teams
React 19 introduces new features and a stability classification system that triggers ESLint warnings for previously standard patterns like defaultProps. Teams must decide whether to update code, ignore warnings, or adopt rules strategically. The warnings only appear in development mode and don't affect production builds.
Meridian48 take
The article offers practical guidance but understates the real cost: large codebases face months of refactoring, and the ESLint lag means teams are flying blind until the ecosystem catches up.
react-19eslint-migration