* add partial application syntax and some tests remove unnecessary error message and hasPartial function from parseNewArguments add types for PartialExpression Update the tests rename PartialExpression to Partial move Partial from expressions to types and rename to ArgumentPlaceholder add tests for ArgumentPlaceholder in babel-generator rename Partial to ArgumentPlaceholder update the tests remove alias from the type and undo changes in generated folder adds a nice error message better definition for the type auto-generated files update the conditional for allowPlaceholder message and tests update CallExpression definition to accept ArgumentPlaceholder change description clean up indent ArgumentPlaceholder entry and revert unwanted changes * add Partial Application Plugin * update unwrapArguments function and add replacePlaceholders. * update the tests * remove unnecessary clone * update readme and description an package.json * put options.json one level up and add test for not assigned and chained * add await to fix the test * use Promise in the test instead of async await * remove unnecessary method test [#9474] * push sequenceExpressions to an array [#9474]
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 (see below)!
Open Collective Sponsors
Become a sponsor and get your logo on our README on Github with a link to your site. [Become a sponsor]
Patreon Sponsors
Become a sponsor and get your logo on our README on Github with a link to your site. [Become a sponsor]
Bronze
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
// ES2015 arrow function
[1, 2, 3].map((n) => n + 1);
Out
[1, 2, 3].map(function(n) {
return n + 1;
});
Try it out at our REPL.
FAQ
Who maintains Babel?
Mostly a handful of volunteers, funded by you! Please check out our team page!
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.
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!
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 CONTRIBUTING.md to get started with setting up the repo.
- If you have already joined Slack, join our #development channel and say hi!
- Check out the 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.
- Our discussions/notes/roadmap: babel/notes
- Our progress on TC39 proposals: babel/proposals
How is the repo structured?
The Babel repo is managed as a monorepo that is composed of many npm packages.

