ESLint + Prettier + Lint Staged config file

.eslintrc.json

{
  "parser": "babel-eslint",
  "extends": ["airbnb", "prettier", "prettier/react"],
  "plugins": ["prettier"],
  "env": {
    "browser": true,
    "node": true
  },
  "rules": {
    "react/jsx-filename-extension": [1, { "extensions": [".js"] }],
    "no-use-before-define": [
      "error",
      {
        "classes": false,
        "functions": false,
        "variables": true
      }
    ],
    "prettier/prettier": [
      "error",
      {
        "singleQuote": true,
        "printWidth": 100,
        "trailingComma": "all"
      }
    ]
  }
}

.lintstagedrc.json

{
  "*.js": ["eslint --fix", "git add"]
}