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Running ESLint

With your config in place, run ESLint as you normally would.

Lint your code​

npx eslint src/

Auto-fix​

npx eslint src/ --fix

Add scripts to package.json​

For convenience, add these to your package.json:

{
  "scripts": {
    "lint": "eslint src/",
    "lint:fix": "eslint src/ --fix"
  }
}

Then run:

npm run lint
npm run lint:fix

What gets enforced​

Out of the box, uglier enforces:

  • No semicolons (ASI)
  • Double quotes
  • 2-space indentation
  • No spaces after control keywords (if(x) not if (x))
  • Arrow parens only when needed (x => not (x) =>)
  • 1TBS brace style
  • Mandatory blank lines after control statements
  • No internal object spacing ({a: 1} not { a: 1 })
  • 80 character max line length
  • JSDoc documentation requirements (when using lints-jsdoc)

All of these can be customized — see Customization.