ESLint + Prettier

.eslintrc.js

module.exports = {
  extends: ['airbnb/base', 'eslint-config-prettier'],
  plugins: ['prettier'],
  rules: {
    'prettier/prettier': 'error',
  },
};

.prettierignore

# Ignore artifacts:
**/dist
**/coverage
**/.vscode
**/.nyc_output
**/.vs
.github
.all-contributorsrc
CONTRIBUTORS.md

.prettierrc

{
  "singleQuote": true,
  "trailingComma": "es5"
}

package.json

{
  "name": "boilerplate",
  "version": "0.0.0",
  "private": true,
  "scripts": {
    "eslint:check": "eslint <path_to_the_folders_to_check>",
    "eslint:fix": "eslint --fix --quiet",
    "eslint:changed:fix": "git diff $(git merge-base master HEAD) --name-only --diff-filter=d \"*.js\" | xargs eslint --fix --quiet",
  },
  "devDependencies": {
    "eslint": "^7.11.0",
    "eslint-config-airbnb": "^18.2.0",
    "eslint-config-prettier": "^6.13.0",
    "eslint-plugin-import": "^2.22.1",
    "eslint-plugin-prettier": "^3.1.4",
    "prettier": "2.1.2"
  }
}