.eslintrc.json

{
    "env": {
        "browser": true,
        "es6": true,
        "mocha": true
    },
    "extends": [
        "airbnb-base",
        "plugin:prettier/recommended"
    ],
    "globals": {
        "Atomics": "readonly",
        "SharedArrayBuffer": "readonly"
    },
    "parserOptions": {
        "ecmaVersion": 2018,
        "sourceType": "module"
    },
    "plugins": [
      "prettier"
    ],
    "rules": {
      "no-underscore-dangle": "off",
      // "import/prefer-default-export": "off",
      // "import/no-default-export": "error",

      // enhance linting speed
      "import/no-cycle": "off",

      "import/order": ["error", {
        "groups": [["builtin", "external"], "internal", ["parent", "sibling"], "index"],
        "newlines-between": "always"
      }],
      "import/no-extraneous-dependencies": ["error", {
        "devDependencies": ["**/*.test.js", "**/*.spec.js", "modules/testUtilities/*.js", "docs/**"]
      }],
      // "import/no-internal-modules": "off",
      // "no-restricted-imports": ["error", "@material-ui/core", "@material-ui/icons", "i18next", "react-i18next"],

      // should allowShortCircuit and allowTernary be true?
      "no-unused-expressions": ["error", { "allowShortCircuit": true, "allowTernary": true  }],

      "no-console": ["error", { "allow": ["info", "warn", "error"] }],
      "lines-between-class-members": ["error", "always", { "exceptAfterSingleLine": true }],

      // Why?
      // "no-undef": "off",

      "prettier/prettier": "error"
    }
}