.eslintrc.json

{
  "plugins": ["jsdoc", "prefer-arrow", "prettier"],
  "parserOptions": {
    "sourceType": "module",
    "ecmaVersion": 12
  },
  "env": {
    "browser": true
  },
  "overrides": [
    {
      "files": ["*.spec.js"],
      "rules": {
        "no-magic-numbers": 0,
        "no-undefined": 0
      },
      "env": {
        "browser": false,
        "jest": true
      }
    },
    {
      "files": ["sandbox.js"],
      "rules": {
        "no-magic-numbers": 0,
        "no-console": 0,
        "no-unused-expressions": 0,
        "no-lone-blocks": 0,
        "jsdoc/require-jsdoc": 0,
        "no-undefined": 0
      },
      "env": {
        "jest": true
      }
    }
  ],
  "ignorePatterns": ["dev-scripts/*.js"],
  "extends": ["eslint:recommended", "airbnb-base", "prettier"],
  "rules": {
    "no-var": 1,
    "prefer-const": 1,
    "no-extra-parens": 1,
    "no-unreachable-loop": 1,
    "eqeqeq": 1,
    "no-implicit-coercion": 1,
    "no-implicit-globals": 1,
    "no-lone-blocks": 1,
    "no-return-assign": 1,
    "no-unused-expressions": 1,
    "no-useless-computed-key": 1,
    "no-useless-rename": 1,
    "no-label-var": 1,
    "no-shadow": 1,
    "no-undefined": 1,
    "arrow-parens": 1,
    "arrow-body-style": 0,
    "no-confusing-arrow": 1,
    "vars-on-top": 0,
    "no-plusplus": 0,
    "no-warning-comments": 1,
    "prefer-destructuring": 1,
    "no-restricted-syntax": [
      0,
      {
        "selector": "ForInStatement"
      },
      {
        "selector": "ForOfStatement"
      }
    ],

    "prettier/prettier": 1,

    "prefer-arrow/prefer-arrow-functions": ["warn"],

    "jsdoc/check-alignment": 1,
    "jsdoc/check-indentation": 1,
    "jsdoc/check-line-alignment": 1,
    "jsdoc/check-param-names": 1,
    "jsdoc/check-syntax": 1,
    "jsdoc/check-tag-names": 1,
    "jsdoc/check-types": 1,
    "jsdoc/check-values": 1,
    "jsdoc/empty-tags": 1,
    "jsdoc/newline-after-description": 1,
    "jsdoc/no-bad-blocks": 1,
    "jsdoc/no-undefined-types": 1,
    "jsdoc/require-description": 1,
    "jsdoc/require-hyphen-before-param-description": 1,
    "jsdoc/require-jsdoc": 1,
    "jsdoc/require-param": 1,
    "jsdoc/require-param-description": 1,
    "jsdoc/require-param-name": 1,
    "jsdoc/require-param-type": 1,
    "jsdoc/require-returns": 1,
    "jsdoc/require-returns-check": 1,
    "jsdoc/require-returns-description": 1,
    "jsdoc/require-returns-type": 1,
    "jsdoc/require-throws": 1,
    "jsdoc/require-yields": 1,
    "jsdoc/require-yields-check": 1,
    "jsdoc/valid-types": 1,

    "import/prefer-default-export": 0,
    "import/extensions": [1, { "js": "always" }]
  }
}