Contributing

Install

$ yarn

Build the publish Babel sources:

# One time build
$ yarn run build

# Watch
$ yarn run build-watch

Run the webpack-dev-server on http://localhost:8080

$ yarn start

Basics:

# Everything
$ yarn run check

# ... which really runs
$ yarn run lint
$ yarn run test

And E2E tests (you must be on node@8+):

$ yarn run test-e2e

(Only for project administrators)

We use an npm version release workflow:

Run npm version patch (or minor|major|ACTUAL_VERSION_NUMBER) which runs tests/lint, builds all files we need to publish, mutates package.json, and does all the requisite git stuff.
Run npm publish and publish to npm if all is well.
Run git push && git push --tags