.eslintrc.js

module.exports = {
  env: { es6: true, node: true, jest: true },
  extends: ["eslint:recommended", "plugin:import/errors", "prettier", "plugin:sonarjs/recommended"],
  parser: "@typescript-eslint/parser",
  parserOptions: {
    ecmaVersion: 2018,
    ecmaFeatures: { modules: true },
    sourceType: "module",
  },
  plugins: ["import", "notice", "sonarjs"],
  rules: {
    // possible errors
    "for-direction": "error",
    "no-prototype-builtins": "error",
    "no-template-curly-in-string": "error",
    "no-unsafe-negation": "error",

    // best practices
    "array-callback-return": "error",
    "block-scoped-var": "error",
    complexity: "error",
    "consistent-return": "error",
    eqeqeq: ["error", "smart"],
    "guard-for-in": "error",
    "no-alert": "error",
    "no-caller": "error",
    "no-div-regex": "error",
    "no-eval": "error",
    "no-extend-native": "error",
    "no-extra-bind": "error",
    "no-extra-label": "error",
    "no-floating-decimal": "error",
    "no-implied-eval": "error",
    "no-iterator": "error",
    "no-labels": "error",
    "no-lone-blocks": "error",
    "no-loop-func": "error",
    "no-new": "error",
    "no-new-func": "error",
    "no-new-wrappers": "error",
    "no-proto": "error",
    "no-restricted-properties": "error",
    "no-return-assign": "error",
    "no-return-await": "error",
    "no-self-compare": "error",
    "no-sequences": "error",
    "no-throw-literal": "error",
    "no-unmodified-loop-condition": "error",
    "no-unused-expressions": "error",
    "no-useless-call": "error",
    "no-useless-concat": "error",
    "no-useless-escape": "error",
    "no-useless-return": "error",
    "no-void": "error",
    "no-with": "error",
    radix: "error",
    "require-await": "error",
    "wrap-iife": "error",
    yoda: "error",

    // stylistic
    camelcase: "warn",
    "consistent-this": ["warn", "that"],
    "func-name-matching": "error",
    "func-style": ["warn", "declaration", { allowArrowFunctions: true }],
    "lines-between-class-members": ["error", "always", { exceptAfterSingleLine: true }],
    "max-depth": "warn",
    "max-lines": ["warn", 1000],
    "max-params": ["warn", 4],
    "no-array-constructor": "warn",
    "no-bitwise": "warn",
    "no-lonely-if": "error",
    "no-multi-assign": "warn",
    "no-nested-ternary": "warn",
    "no-new-object": "warn",
    "no-underscore-dangle": "warn",
    "no-unneeded-ternary": "warn",
    "one-var": ["warn", "never"],
    "operator-assignment": "warn",
    "padding-line-between-statements": "error",

    // es2015
    "no-duplicate-imports": "error",
    "no-useless-computed-key": "error",
    "no-useless-rename": "error",
    "no-var": "error",
    "object-shorthand": "error",
    "prefer-arrow-callback": "error",
    "prefer-const": "error",
    "prefer-destructuring": ["warn", { object: true, array: false }],
    "prefer-numeric-literals": "warn",
    "prefer-rest-params": "warn",
    "prefer-spread": "warn",

    // disabled because of the usage of typescript-eslint-parser
    // https://github.com/eslint/typescript-eslint-parser/issues/77
    "no-undef": "off",
    "no-unused-vars": "off",

    // import
    "import/extensions": "error",
    "import/first": "error",
    "import/newline-after-import": "error",
    "import/no-absolute-path": "error",
    "import/no-amd": "error",
    "import/no-deprecated": "error",
    "import/no-duplicates": "error",
    "import/no-mutable-exports": "error",
    "import/no-named-as-default": "error",
    "import/no-named-as-default-member": "error",
    "import/no-named-default": "error",
    "import/order": [
      "error",
      {
        groups: ["builtin", "external", ["index", "sibling"], ["parent", "internal"]],
        "newlines-between": "never",
      },
    ],

    // does not properly work with ts
    "import/no-unresolved": "off",

    // notice
    "notice/notice": ["error", { templateFile: "scripts/file-header.ts" }],

    // sonarjs
    "sonarjs/cognitive-complexity": "warn",
  },
};