Linting & formatting

This project uses ESLint, Stylelint, Markdownlint, and Prettier to catch errors and avoid bikeshedding by enforcing a common code style.

Languages

• JavaScript is linted by ESLint and formatted by Prettier
• HTML (in templates and JSX) is linted by ESLint
• CSS is linted by Stylelint and formatted by Prettier
• Markdown is linted by Markdownlint and formatted by Prettier
• JSON is formatted by Prettier

Scripts

There are a few different contexts in which the linters run.

Terminal

# Lint all files, fixing many violations automatically
yarn lint

See package.json to update.

Pre-commit

Staged files are automatically linted and tested before each commit. See lint-staged.config.js to update.

Editor

In supported editors, all files will be linted and formatted on-save. See editors.md for details.

Configuration

This project ships with opinionated defaults, and each tools configuration is in the following config files:

• ESLint
  • .eslintrc.js
  • .eslintignore
• Stylelint
  • stylelint.config.js
• Markdownlint
  • .markdownlintrc
• Prettier
  • .prettierrc
  • .prettierignore

FAQ

So many configuration files! Why not move more of this to package.json?

• Moving all possible configs to package.json can make it really packed, so that quickly navigating to a specific config becomes difficult.
• When split out into their own file, many tools provide the option of exporting a config from JS. I do this wherever possible, because dynamic configurations are simply more powerful, able to respond to environment variables and much more.