.eslintrc

{
  "parser": "babel-eslint",
  "extends": ["eslint:recommended", "plugin:react/recommended", "prettier", "prettier/react"],
  "plugins": ["prettier", "react", "emotion"],
  "parserOptions": {
    "ecmaVersion": 2018,
    "sourceType": "module",
    "ecmaFeatures": {
      "jsx": true
    }
  },
  "env": {
    "browser": true,
    "es6": true,
    "node": true,
    "jest": true
  },
  "globals": {
    "spyOn": true
  },
  "settings": {
    "react": {
      "version": "detect"
    }
  },
  "rules": {
    "no-console": "off",
    "no-inner-declarations": "off",
    "valid-jsdoc": "off",
    "require-jsdoc": "off",
    "quotes": ["error", "single"],
    "import/no-unresolved": "off",
    "react/jsx-pascal-case": "off",
    "import/order": "off",
    "babel/camelcase": "off",
    "jsx-a11y/label-has-for": "off",
    "max-lines-per-function": "off",
    "consistent-return": ["error"],
    "no-extra-semi": "error",
    "arrow-body-style": ["error", "as-needed", { "requireReturnForObjectLiteral": true }],
    "react/display-name": "off",
    "jsx-quotes": ["error", "prefer-double"],
    "object-curly-spacing": ["error", "always"],
    "no-duplicate-imports": "error",

    // http://eslint.org/docs/rules/array-callback-return
    "array-callback-return": "error",

    // http://eslint.org/docs/rules/curly
    "curly": ["error", "all"],

    // http://eslint.org/docs/rules/no-eval
    "no-eval": "error",

    // http://eslint.org/docs/rules/no-implied-eval
    "no-implied-eval": "error",

    // http://eslint.org/docs/rules/no-param-reassign
    "no-param-reassign": ["error", { "props": true }],

    // http://eslint.org/docs/rules/no-return-assign
    "no-return-assign": "error",

    // http://eslint.org/docs/rules/no-self-compare
    "no-self-compare": "error",

    // http://eslint.org/docs/rules/radix
    "radix": "error",

    // http://eslint.org/docs/rules/no-array-constructor
    "no-array-constructor": "error",

    // http://eslint.org/docs/rules/no-new-wrappers
    "no-new-wrappers": "error",

    // http://eslint.org/docs/rules/no-cond-assign
    "no-cond-assign": "error",

    // http://eslint.org/docs/rules/no-use-before-define
    "no-use-before-define": ["error", { "functions": false }],

    // https://eslint.org/docs/rules/no-undef
    "no-undef": "error",

    // http://eslint.org/docs/rules/eqeqeq
    "eqeqeq": "error",

    // http://eslint.org/docs/rules/no-new-object
    "no-new-object": "error",

    // https://eslint.org/docs/rules/no-nested-ternary
    "no-nested-ternary": "error",

    // http://eslint.org/docs/rules/no-unused-vars
    "no-unused-vars": ["error", { "ignoreRestSiblings": true }],

    // http://eslint.org/docs/rules/no-var
    "no-var": "error",

    // http://eslint.org/docs/rules/prefer-const
    "prefer-const": "error",

    // https://eslint.org/docs/rules/prefer-arrow-callback
    "prefer-arrow-callback": "error",

    // http://eslint.org/docs/rules/new-cap
    "new-cap": [
      "error",
      {
        "capIsNewExceptions": [
          "Collection",
          "DropTarget",
          "DragDropContext",
          "DragSource",
          "Map",
          "List",
          "OrderedMap",
          "OrderedSet",
          "Record",
          "Seq",
          "Set"
        ]
      }
    ],

    // https://eslint.org/docs/rules/object-shorthand
    "object-shorthand": ["error", "properties"],

    // https://eslint.org/docs/rules/no-useless-computed-key
    "no-useless-computed-key": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-undef.md
    "react/jsx-no-undef": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-direct-mutation-state.md
    "react/no-direct-mutation-state": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/react-in-jsx-scope.md
    "react/react-in-jsx-scope": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-boolean-value.md
    "react/jsx-boolean-value": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-duplicate-props.md
    "react/jsx-no-duplicate-props": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-key.md
    "react/jsx-key": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-uses-react.md
    "react/jsx-uses-react": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-uses-vars.md
    "react/jsx-uses-vars": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-unknown-property.md
    "react/no-unknown-property": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/prop-types.md
    "react/prop-types": "off",
    // "react/prop-types": [
    //   "error",
    //   {
    //     "ignore": ["children", "className"]
    //   }
    // ],

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-no-target-blank.md
    "react/jsx-no-target-blank": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-string-refs.md
    "react/no-string-refs": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/boolean-prop-naming.md
    "react/boolean-prop-naming": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/forbid-foreign-prop-types.md
    "react/forbid-foreign-prop-types": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-is-mounted.md
    "react/no-is-mounted": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-render-return-value.md
    "react/no-render-return-value": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/void-dom-elements-no-children.md
    "react/void-dom-elements-no-children": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-typos.md
    "react/no-typos": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-access-state-in-setstate.md
    "react/no-access-state-in-setstate": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-unescaped-entities.md
    "react/no-unescaped-entities": ["error", { "forbid": [">", "}"] }],

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-unused-prop-types.md
    "react/no-unused-prop-types": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-find-dom-node.md
    "react/no-find-dom-node": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/prefer-es6-class.md
    "react/prefer-es6-class": "error",

    // https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-deprecated.md
    "react/no-deprecated": "error",
    "emotion/jsx-import": "error",
    "emotion/no-vanilla": "error",
    "emotion/import-from-emotion": "error",
    "emotion/styled-import": "error"
  },
  "overrides": [
    {
      "files": ["packages/**/gatsby-browser.js", "packages/gatsby/cache-dir/**/*"],
      "env": {
        "browser": true
      },
      "globals": {
        "___loader": false,
        "___emitter": false
      }
    }
  ]
}