.eslintrc.json

{
  "env": {
    "browser": true,
    "es2020": true,
    "jest": true
  },
  "extends": [
    "plugin:react/recommended",
    "airbnb",
    "plugin:prettier/recommended",
    "prettier"
  ],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaFeatures": {
      "jsx": true
    },
    "ecmaVersion": 11,
    "sourceType": "module"
  },
  "overrides": [
    {
      "files": ["*.ts", "*.tsx"],
      "parserOptions": {
        "project": ["./tsconfig.json"]
      },
      // This is handled by TypeScript
      "rules": {
        "no-undef": "off"
      }
    }
  ],
  "plugins": ["react", "@typescript-eslint", "import", "jsx-a11y"],
  "settings": {
    "import/resolver": {
      "node": {
        "extensions": [".js", ".jsx", ".ts", ".tsx", ".json"]
      },
      "typescript": {}
    }
  },
  "rules": {
    "import/extensions": [
      "error",
      "ignorePackages",
      {
        "js": "never",
        "mjs": "never",
        "jsx": "never",
        "ts": "never",
        "tsx": "never"
      }
    ],
    "react/jsx-filename-extension": [1, { "extensions": [".tsx"] }],
    "import/prefer-default-export": 0,
    "import/no-extraneous-dependencies": [
      "error",
      {
        "devDependencies": true
      }
    ],
    // this is turned off because we need to let typescript plugin to take over
    "no-unused-vars": "off",
    "@typescript-eslint/no-unused-vars": ["error"],
    "camelcase": "off",
    "react/prop-types": 0,
    "no-confusing-arrow": 0,
    "react/jsx-props-no-spreading": 0,
    // Disabled for React17's automatic JSX transform
    "react/jsx-uses-react": "off",
    "react/react-in-jsx-scope": "off",
    // Disable defaults and enable TypeScript-specific rules
    "no-use-before-define": "off",
    "@typescript-eslint/no-use-before-define": ["error"],
    "no-shadow": "off",
    "@typescript-eslint/no-shadow": ["error"],
    "react/require-default-props": "off",
    "no-console": ["warn", { "allow": ["error", "debug"] }],
    "no-plusplus": ["error", { "allowForLoopAfterthoughts": true }],
    "object-shorthand": ["error", "always"],
    "no-return-await": "error"
  }
}