babel-preset-github

GitHub.com's official Babel preset for transpiling JavaScript. Current version 3.2.1 (released 2019, last updated 2019-08-08). Based on `@babel/preset-env` with curated set of plugins used by GitHub.com, including support for ES2018+ and some non-standard features. Targets GitHub's browser support matrix by default, but supports custom browserlist targets. Limited release cadence and narrow scope (primarily for internal GitHub usage). Minimal community adoption outside GitHub.