.eslintrc.json

{
  "env": {
    "browser": true,
    "es6": true
  },
  "extends": ["airbnb"],
  "globals": {
    "Atomics": "readonly",
    "SharedArrayBuffer": "readonly"
  },
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaFeatures": {
      "jsx": true
    },
    "ecmaVersion": 2018,
    "sourceType": "module"
  },
  "settings": {
    "import/resolver": {
      "node": {
        "extensions": [".js", ".jsx", ".ts", ".tsx"]
      }
    }
  },
  "plugins": ["react", "@typescript-eslint"],
  "rules": {
    "react/jsx-filename-extension": [1, { "extensions": [".js", ".jsx"] }],
    "react/prefer-stateless-function": [0, { "ignorePureComponents": false }],
    "indent": ["error", 2],
    "linebreak-style": ["error", "unix"],
    "quotes": ["error", "single"],
    "semi": ["error", "always"],
    "no-console": ["error", { "allow": ["error"] }],
    "no-dupe-args": "error",
    "no-dupe-keys": "error",
    "no-empty": "error",
    "no-extra-semi": "error",
    "no-func-assign": "error",
    "no-irregular-whitespace": "error",
    "no-sparse-arrays": "error",
    "no-unexpected-multiline": "error",
    "no-unreachable": "error",
    "class-methods-use-this": "error",
    "curly": "error",
    "eqeqeq": "error",
    "no-invalid-this": "error",
    "keyword-spacing": "error",
    "space-before-blocks": "error"
  },
  "overrides": [
    {
      "files": [
        "**/*.spec.js",
        "**/*.spec.jsx",
        "**/*.test.js",
        "**/*.test.jsx"
      ],
      "env": {
        "jest": true
      }
    }
  ]
}