ESlint and Prettier for React apps (Bonus - Next.js and TypeScript)

.eslintignore

node_modules

.eslintrc.js

module.exports = {
    root: true,
    parser: '@typescript-eslint/parser',
    parserOptions: {
        ecmaVersion: 2020,
        sourceType: 'module',
        ecmaFeatures: {
            jsx: true
        }
    },
    settings: {
        react: {
            version: 'detect'
        }
    },
    env: {
        browser: true,
        amd: true,
        node: true
    },
    plugins: ['simple-import-sort'],
    extends: [
        'eslint:recommended',
        'plugin:@typescript-eslint/eslint-recommended',
        'plugin:@typescript-eslint/recommended',
        'plugin:react/recommended',
        'plugin:jsx-a11y/recommended',
        'prettier/@typescript-eslint',
        'plugin:prettier/recommended'
    ],
    rules: {
        'prettier/prettier': ['error', {}, { usePrettierrc: true }],
        'react/react-in-jsx-scope': 'off',
        'react/prop-types': 'off',
        '@typescript-eslint/explicit-function-return-type': 'off',
        'simple-import-sort/sort': 'error',
        'jsx-a11y/anchor-is-valid': [
            'error',
            {
                components: ['Link'],
                specialLink: ['hrefLeft', 'hrefRight'],
                aspects: ['invalidHref', 'preferButton']
            }
        ]
    }
};

.prettierignore

node_modules

.prettierrc

{
    "semi": true,
    "tabWidth": 4,
    "printWidth": 100,
    "singleQuote": true,
    "trailingComma": "none",
    "jsxBracketSameLine": true
}

install_commands.sh

npm i -D eslint \
         prettier \
         eslint-plugin-react \
         eslint-plugin-react-hooks \
         eslint-config-prettier \
         eslint-plugin-prettier \
         eslint-plugin-jsx-a11y 
        
# TypeScript dependencies
npm i -D @typescript-eslint/eslint-plugin \
         @typescript-eslint/parser \

# Import sort plugin
npm i -D eslint-plugin-simple-import-sort

# Husky and lint-staged
npm i -D husky lint-staged

package.json

{
    "scripts": {
    "lint": "eslint --fix .",
    "format": "prettier --write './**/*.{js,jsx,ts,tsx,css,md,json}' --config ./.prettierrc"
    },
    "husky": {
    "hooks": {
      "pre-commit": "lint-staged"
    }
  },
  "lint-staged": {
    "./**/*.{js,jsx,ts,tsx}": [
      "eslint --fix",
    ]
  }
}