d3a7cd5e8d
* update benchmark babel parser version * perf: replace generic __clone by specific methods baseline 256 length-1 named export: 4_704 ops/sec ±1.59% (0.213ms) baseline 512 length-1 named export: 2_426 ops/sec ±0.52% (0.412ms) baseline 1024 length-1 named export: 1_118 ops/sec ±1.23% (0.895ms) baseline 2048 length-1 named export: 556 ops/sec ±0.77% (1.799ms) current 256 length-1 named export: 7_073 ops/sec ±33.67% (0.141ms) current 512 length-1 named export: 4_441 ops/sec ±0.79% (0.225ms) current 1024 length-1 named export: 2_142 ops/sec ±1.09% (0.467ms) current 2048 length-1 named export: 943 ops/sec ±2.12% (1.06ms) * breaking: remove Node#__clone in Babel 8 * test: use t.cloneNode
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 GitHub (which goes to our Open Collective account)!
Sponsors
Our top sponsors are shown below! [Become a 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
// 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! (sign-up)
- 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.