React Native 0.84 makes Hermes V1 the default JavaScript engine, delivering automatic performance improvements and reduced memory usage. The release enables precompiled iOS binaries by default to speed up build times, continues removing Legacy Architecture code from both platforms, and requires Node.js 22.11 minimum. Additional updates include React 19.2.3, ESLint v9 Flat Config support, enhanced accessibility features, improved URL API compliance, and support for additional image formats like HEIC and HEIF.
Table of contents
Hermes V1 as Default Precompiled Binaries on iOS by Default Legacy Architecture Components Removed Node.js 22 Minimum Other Changes Deprecations Acknowledgements Upgrade to 0.84 Sort: