The compiler for writing next generation JavaScript.

Supporting Babel

Babel (pronounced ["babble"](https://soundcloud.com/sebmck/how-to-pronounce-babel)) is a community-driven project used by many companies and projects, and is maintained by a group of [volunteers](https://babeljs.io/team). If you'd like to help support the future of the project, please consider: - Giving developer time on the project. (Message us on [Twitter](https://twitter.com/babeljs) or [Slack](https://slack.babeljs.io/) for guidance!) - Giving funds by becoming a sponsor on [Open Collective](https://opencollective.com/babel) or [GitHub](https://github.com/sponsors/babel/) (which goes to our Open Collective account)! ## Sponsors Our top sponsors are shown below! [[Become a sponsor](https://opencollective.com/babel#sponsor)]

## Intro Babel is a tool that helps you write code in the latest version of JavaScript. When your supported environments don't support certain features natively, Babel will help you compile those features down to a supported version. **In** ```js // ES2020 nullish coalescing function greet(input) { return input ?? "Hello world"; } ``` **Out** ```js function greet(input) { return input != null ? input : "Hello world"; } ``` Try it out at our [REPL](https://babel.dev/repl#?browsers=defaults&loose=true&code_lz=GYVwdgxgLglg9mABAcwE4FN1QBQzABxCgEpEBvAKEUQyhFST0KkQH5XEAiACXQBs-cRAHc4qPgBNOAbgoBfIA&shippedProposals=true&sourceType=script&lineWrap=true&presets=env%2Cenv&prettier=true&forceAllTransforms=true). ## FAQ ### Who maintains Babel? Mostly a handful of volunteers, funded by you! Please check out our [team page](https://babeljs.io/team)! ### Is there a Babel song? I'm so glad you asked: [Hallelujah —— In Praise of Babel](SONG.md) by [@angus-c](https://github.com/angus-c), [audio version](https://youtu.be/40abpedBKK8) by [@swyx](https://twitter.com/@swyx). Tweet us your recordings! ### Looking for support? For questions and support please [join or open a GitHub Discussion](https://github.com/babel/babel/discussions), join our [Slack Community](https://slack.babeljs.io/) (you can [sign up here](https://slack.babeljs.io/) for an invite), ask a question on [Stack Overflow](https://stackoverflow.com/questions/tagged/babeljs), or ping us on [Bluesky](https://bsky.app/profile/babel.dev). ### Where are the docs? Check out our website: [babeljs.io](https://babeljs.io/), and report issues/features at [babel/website](https://github.com/babel/website/issues). ### Want to report a bug or request a feature? Please read through our [CONTRIBUTING.md](CONTRIBUTING.md) and fill out the issue template at [babel/issues](https://github.com/babel/babel/issues)! ### Want to contribute to Babel? Check out: - Our [#development](https://babeljs.slack.com/messages/development) Slack channel and say hi! ([sign-up](https://slack.babeljs.io)) - Issues with the [good first issue](https://github.com/babel/babel/labels/good%20first%20issue) and [help wanted](https://github.com/babel/babel/labels/help%20wanted) label. We suggest also looking at the [closed ones](https://github.com/babel/babel/issues?utf8=%E2%9C%93&q=is%3Aclosed+label%3A%22good+first+issue%22) to get a sense of the kinds of issues you can tackle. Some resources: - Our [CONTRIBUTING.md](CONTRIBUTING.md) to get started with setting up the repo. - Our discussions/notes/roadmap: [babel/notes](https://github.com/babel/notes) - Our progress on TC39 proposals: [babel/proposals](https://github.com/babel/proposals) - Our blog which contains release posts and explanations: [/blog](https://babeljs.io/blog) - Our videos page with talks about open source and Babel: [/videos](https://babeljs.io/videos) - Our [podcast](https://podcast.babeljs.io) ### How is the repo structured? The Babel repo is managed as a [monorepo](doc/design/monorepo.md) that is composed of many [npm packages](packages/README.md). ## License [MIT](LICENSE)