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https://github.com/babel/babel

🐠 Babel is a compiler for writing next generation JavaScript.
https://github.com/babel/babel

ast babel compiler es2015 es6 flavortown javascript

Last synced: 4 days ago
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🐠 Babel is a compiler for writing next generation JavaScript.

Host: GitHub
URL: https://github.com/babel/babel
Owner: babel
License: mit
Created: 2014-09-28T13:38:23.000Z (about 10 years ago)
Default Branch: main
Last Pushed: 2024-10-28T17:06:51.000Z (about 2 months ago)
Last Synced: 2024-10-29T15:29:28.665Z (about 1 month ago)
Topics: ast, babel, compiler, es2015, es6, flavortown, javascript
Language: TypeScript
Homepage: https://babel.dev
Size: 116 MB
Stars: 43,223
Watchers: 805
Forks: 5,639
Open Issues: 779
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
- Security: SECURITY.md

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README

        


  

    

  





  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%2C%20not%20ie%2011&loose=true&code_lz=GYVwdgxgLglg9mABAcwE4FN1QBQzABxCgEpEBvAKEUQyhFST0KkQH5XEAiACXQBs-cRAHc4qPgBNOAbgoBfIA&shippedProposals=true&sourceType=script&lineWrap=true&presets=env%2Cenv&prettier=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 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 [Twitter](https://twitter.com/babeljs).

### 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)