a4ebe29b3f
* refactor: parseMaybeUnary => parseUnary * refactor: extract shouldExitDescending method * refactor: add parseUpdate * refactor: avoid comparing with hardcoded token value * refactor: add ParseNewOrNewTarget * refactor: add parseCoverCallAndAsyncArrowHead * add parseBind * refactor: polish parseTaggedTemplateExpression interface * refactor: add parseMember method * refactor: add parseSuper method * refactor: add parseAsyncArrowUnaryFunction method * fix: disallow line break before async binding arrow * refactor: simplify tt.name logic * refactor: add parseDo method * refactor: misc * refactor: rename parseObjectMember by parsePropertyDefinition * refactor: unify set/get/async keyword parsing in ObjectMethod * refactor: misc * refactor: add parseArrayLike method * refactor: move fsharp epilogure and prologue inside parseObjectLike * fixup * refactor: rename parseFunctionExpression to parseFunctionOrFunctionSent * refactor: remove redundant logic * refactor: rename parseClassPropertyName by parseClassElementName * refactor: avoid unecessary lookahead when parsing tt._export * fix: export-default-from should support escaped async as export binding * address review comments * parseUnary -> parseMaybeUnary
The compiler for writing next generation JavaScript.
Supporting Babel
Babel (pronounced "babble") is a community-driven project used by many companies and projects, 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 Twitter or Slack for guidance!)
- Giving funds by becoming a sponsor on Open Collective or Patreon!
Sponsors
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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
// ES2020 nullish coalescing
function greet(input) {
return input ?? "Hello world";
}
Out
function greet(input) {
return input != null ? input : "Hello world";
}
Try it out at our REPL.
FAQ
Who maintains Babel?
Mostly a handful of volunteers, funded by you! Please check out our team page!
Is there a Babel song?
I'm so glad you asked: Hallelujah —— In Praise of Babel by @angus-c, audio version by @swyx. Tweet us your recordings!
Looking for support?
For questions and support please join our Slack Community (you can sign-up here for an invite), ask a question on Stack Overflow, or ping us on Twitter.
Where are the docs?
Check out our website: babeljs.io, and report issues/features at babel/website.
Want to report a bug or request a feature?
Please read through our CONTRIBUTING.md and fill out the issue template at babel/issues!
Want to contribute to Babel?
Check out:
- Our #development Slack channel and say hi (signup)!
- Issues with the good first issue and help wanted label. We suggest also looking at the closed ones to get a sense of the kinds of issues you can tackle.
Some resources:
- Our CONTRIBUTING.md to get started with setting up the repo.
- Our discussions/notes/roadmap: babel/notes
- Our progress on TC39 proposals: babel/proposals
- Our blog which contains release posts and explanations: /blog
- Our videos page with talks about open source and Babel: /videos
- Our podcast
How is the repo structured?
The Babel repo is managed as a monorepo that is composed of many npm packages.