<p align="center"> <a href="https://swc.rs/"> <img alt="swc" src="https://raw.githubusercontent.com/swc-project/logo/master/swc.png" width="546"> </a> </p> <p align="center"> Make the web (development) faster. </p> <p align="center"> <a href="https://www.npmjs.com/package/@swc/core"> <img alt="downloads (@swc/core)" src="https://img.shields.io/npm/dm/@swc/core?label=downloads%20%28%40swc%2Fcore%29"> </a> <a href="https://www.npmjs.com/package/@swc/counter?activeTab=dependents"> <img alt="downloads (3rd party)" src="https://img.shields.io/npm/dm/@swc/counter?label=downloads%20%283rd%20party%29"> </a> </p> <p align="center"> <a href="https://crates.io/crates/swc_ecma_parser"> <img alt="undefined" src="https://img.shields.io/crates/d/swc_ecma_parser.svg?label=crates.io%20downloads"> </a> <a href="https://github.com/swc-project/swc/releases/latest"> <img alt="GitHub release (latest SemVer)" src="https://img.shields.io/github/v/release/swc-project/swc"> </a> </p> <p align="center"> <img alt="GitHub code size in bytes" src="https://img.shields.io/github/languages/code-size/swc-project/swc"> <a href="https://github.com/swc-project/swc/blob/main/package.json#L22"> <img alt="node-current (scoped)" src="https://img.shields.io/node/v/@swc/core"> </a> </p> <p align="center"> <a href="https://discord.com/invite/GnHbXTdZz6"> <img alt="Discord" src="https://img.shields.io/discord/889779439272075314"> </a> </p>

SWC (stands for Speedy Web Compiler) is a super-fast TypeScript / JavaScript compiler written in Rust. It's a library for Rust and JavaScript at the same time. If you are using SWC from Rust, see rustdoc and for most users, your entry point for using the library will be parser.

Also, SWC tries to ensure that

If you select the latest version of each crates, it will work

for rust users.

MSRV of crates is currently 1.73.

To update all SWC crates you use, you can run curl https://raw.githubusercontent.com/swc-project/swc/main/scripts/update-all-swc-crates.sh | bash -s. This script will update all dependencies to the latest version and run cargo build to ensure that everything works. Note that you need

• jq
• cargo upgrade

command to run the script.

---

If you are using SWC from JavaScript, please refer to docs on the website.

Documentation

Check out the documentation in the website.

Features

Please see comparison with babel.

Performance

Please see benchmark results on the website.

<h2 align="center">Supporting swc</h2> <p align="center"> <a href="https://opencollective.com/swc"> <img src="https://raw.githubusercontent.com/swc-project/swc-sponsor-images/main/sponsors.svg" alt="Sponsors"> </a> </p>

SWC is a community-driven project, and is maintained by a group of volunteers. If you'd like to help support the future of the project, please consider:

• Giving developer time on the project. (Message us on Discord (preferred) or Github discussions for guidance!)
• Giving funds by becoming a sponsor (see https://opencollective.com/swc)!

Contributing

See CONTRIBUTING.md. You may also find the architecture documentation useful (ARCHITECTURE.md).

License

SWC is primarily distributed under the terms of the Apache License (Version 2.0).

See LICENSE for details.