.eslintrc.json

{
  "env": {
    "browser": true
  },
  "globals": { "DG": false, "Raphael": false, "$": false, "SC": false, "sc_require": false,
                "sc_super": false, "static_url": false, "NO": false, "YES": false,
                "module": false, "require": false },
  "plugins": ["react", "react-hooks"],
  "extends": [ "eslint:recommended", "plugin:react/recommended", "plugin:json/recommended-with-comments" ],
  "settings": {
    "react": {
      "createClass": "createReactClass", // Regex for Component Factory to use,
                                         // default to "createReactClass"
      "pragma": "React",  // Pragma to use, default to "React"
      "version": "detect" // React version. "detect" automatically picks the version you have installed.
                          // You can also use `16.0`, `16.3`, etc, if you want to override the detected value.
                          // default to latest and warns if missing
                          // It will default to "detect" in the future
    }
  },
  "rules": {
    // possible errors
    "no-console": "off",    // 19 console statements
    "no-extra-parens": "off",   // liberal use of extra parens
    "no-prototype-builtins": "off", // 8 calls to hasOwnProperty
    "no-template-curly-in-string": "error",
    "no-unreachable": "error",
    "no-unsafe-negation": "error",

    // best practices
    "array-callback-return": "error",
    "block-scoped-var": "warn",
    "consistent-return": "off", // liberal use of inconsistent returns, e.g. SproutCore properties
    "dot-notation": ["warn", { "allowKeywords": false }],
    "eqeqeq": ["error", "allow-null"],
    "no-alert": "error",
    "no-caller": "error",
    "no-eval": "error",
    "no-extra-bind": "off", // 18 extra binds
    "no-global-assign": "error",
    "no-invalid-this": "error",
    "no-loop-func": "warn",
    "no-new-wrappers": "error",
    "no-proto": "error",
    "no-sequences": "error",
    "no-unmodified-loop-condition": "error",
    "no-unused-expressions": ["error", { "allowShortCircuit": true }],
    "no-useless-call": "error",
    "no-useless-concat": "warn",
    "no-useless-escape": "off", // 34 unnecessary escapes
    "no-useless-return": "error",
    "no-with": "error",
    "radix": "error",
    "wrap-iife": ["warn", "any"],

    // strict mode
    "strict": "off",

    // variables
    "no-shadow-restricted-names": "error",
    "no-unused-vars": ["warn", { "vars": "all", "args": "none" }],
    "no-use-before-define": "off",  // 169 used before defined

    // node.js/CommonJS
    "no-mixed-requires": "warn",

    // stylistic issues
    "eol-last": "off",  // 13 files missing final EOLs
    "func-name-matching": "error",
    "new-cap": ["warn", { "capIsNew": false }],
    "new-parens": "warn",
    "no-bitwise": "warn",
    "no-lonely-if": "off",  // 8 lonely ifs
    "no-underscore-dangle": "off",  // liberal use of leading underscores
    "no-unneeded-ternary": "warn",
    "no-whitespace-before-property": "warn",
    "quote-props": ["error", "as-needed", { "keywords": true, "unnecessary": false }],
    "quotes": "off",
    "semi": ["error", "always"],

    "react/display-name": "off",
    "react-hooks/rules-of-hooks": "error", // Checks rules of Hooks
    "react-hooks/exhaustive-deps": "warn" // Checks effect dependencies
  }
}