### 💥 BREAKING CHANGES -a31567aallocator: [**BREAKING**] Make `Allocator::cursor_ptr` and `data_end_ptr` private (#26081) (overlookmotel) ### 🚀 Features -784e9faminifier: Invert `!0` and `!1` in place for boolean context to `1` and `0` (#26050) (Armano) -1e902ccminifier: Expand fold leading assignments into the var decl (#26142) (Armano) -3ed4f6aminifier: Expand de morgan's optimization to allow move of `!` (#25930) (Armano) -5672585parser: Attach all comments to nodes (#25944) (camc314) ### 🐛 Bug Fixes -4adfb4csemantic: Validate chained continue labels (#26157) (camc314) -b874f48ecmascript: `Math.round` only exact half ties (#26150) (camc314) -a625378minifier: Coerce omitted `indexOf` search argument (#26149) (camc314) -dc7398becmascript: Trim trailing whitespace in string to number (#26148) (camc314) -243b685transformer/object-rest: Lower multiple declarators correctly (#26147) (camc314) -dc09a3aparser: Avoid panic on escaped string export names (#26146) (camc314) -e412cf2linter: Clamp invalid JS plugin locations (#26144) (camc314) -c3dedc9semantic: Skip function body bindings in parameters (#26099) (Dunqing) -e74de61transform-react: Match Babel diagnostic reporting (#26128) (Boshen) -d5163d0parser: Correctly classify unapplied pure annotations (#26084) (camc314) -8531b9blinter/plugins: Alter method for obtaining mutable `Program` when sending AST to JS plugins (#26077) (overlookmotel) -9b51658regular_expression: Allow oversized decimal escape for Annex B (#26070) (leaysgur) -c8de4dfregular_expression: Reject oversized backreferences (#26055) (camc314) ### ⚡ Performance -ac4785adiagnostics: Use fixed ANSI styles (#26130) (Boshen) -07a0793packages/codegen: Flatten output in chunks (#26109) (overlookmotel) -487427apackages/codegen: Faster string flattening (#26108) (overlookmotel) -7785583packages/codegen: Ensure indent strings are flattened (#26107) (overlookmotel) -0dd4db3packages/codegen: Store mapping positions in an `Int32Array` (#26085) (overlookmotel)
DIVERGENCES.md out from AGENTS.md (#26121)
⚓ Oxc
/oʊ ɛks siː/
The Oxidation Compiler is a collection of high-performance tools for JavaScript and TypeScript written in Rust.
Oxc is part of VoidZero's vision for a unified, high-performance toolchain for JavaScript. It powers Rolldown (Vite's bundler) and enables the next generation of ultra-fast development tools that work seamlessly together.
For more information, check out our website at oxc.rs.
* Oxidation is the chemical process that creates rust
🙋 Who's using Oxc?
Rolldown and Nuxt use Oxc for parsing. Rolldown also uses Oxc for transformation and minification. Nova, swc-node, and knip use oxc_resolver for module resolution. Preact, Shopify, ByteDance, and Shopee use oxlint for linting.
🔧 Lint or Format a Codebase
🧰 Build Tooling on Top of Oxc
- Parse JavaScript and TypeScript: Parser
- Transform TypeScript, JSX, and modern JavaScript: Transformer
- Minify JavaScript for production builds: Minifier
- Resolve modules for JavaScript and TypeScript: Resolver
✍️ Contribute
Check out some of the good first issues or ask us on Discord.
See CONTRIBUTING.md for guidance, or read the complete contributing guide on our website →
If you are unable to contribute by code, you can still participate by:
- Add a GitHub Star to the project
- Join us on Discord
- Follow me on X and post about this project
📚 Other Resources
Sponsored By
📖 License
Oxc is free and open-source software licensed under the MIT License.
Thank you to namespace.so for powering our CI/CD pipelines with fast, free macOS and Linux runners.
Oxc ports or copies code from other open source projects, their licenses are listed in Third-party library licenses.