ESLint + Prettier

.prettierignore

# Ignore artifacts:
build
coverage

.prettierrc

{
  "printWidth": 100,
  "bracketSpacing": true,
  "trailingComma": "all",
  "tabWidth": 2,
  "semi": false,
  "singleQuote": true
}

eslint.config.mjs

import globals from 'globals'
import pluginJs from '@eslint/js'
import tseslint from 'typescript-eslint'
import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended'

/** @type {import('eslint').Linter.Config[]} */
export default [
  { files: ['**/*.{js,mjs,cjs,ts}'] },
  { languageOptions: { globals: globals.browser } },
  pluginJs.configs.recommended,
  ...tseslint.configs.recommended,
  eslintPluginPrettierRecommended,
]

package.json

{
  "name": "my-app",
  "version": "0.0.1",
  "description": "My app",
  "main": "index.js",
  "author": "Tiago Guedes",
  "devDependencies": {
    "@eslint/js": "^9.18.0",
    "eslint": "^9.18.0",
    "eslint-config-prettier": "^10.0.1",
    "eslint-plugin-prettier": "^5.2.2",
    "prettier": "3.4.2",
    "typescript-eslint": "^8.20.0"
    ...
  },
  ...
}