.eslintrc

{
  "extends": [
    "eslint:recommended",
    "plugin:react/recommended",
    "plugin:flowtype/recommended",
    "plugin:import/errors",
    "plugin:import/warnings"
  ],
  "env": {
    "browser": true,
    "es6": true,
    "jest": true,
    "commonjs": true
  },
  "plugins": ["flowtype", "import", "react"],
  "parser": "babel-eslint",
  "parserOptions": {
    "ecmaVersion": 8,
    "sourceType": "module",
    "ecmaFeatures": {
      "jsx": true
    }
  },
  "rules": {
    "accessor-pairs": "error",
    "array-bracket-newline": [
      "error",
      {
        "minItems": 2,
        "multiline": true
      }
    ],
    "array-bracket-spacing": ["warn", "always"],
    "array-callback-return": "error",
    "array-element-newline": [
      "warn",
      {
        "minItems": 2,
        "multiline": true
      }
    ],
    "arrow-body-style": ["error", "as-needed"],
    "arrow-parens": ["warn", "as-needed"],
    "arrow-spacing": "error",
    "block-spacing": "error",
    "brace-style": "warn",
    "camelcase": "error",
    "comma-dangle": ["warn", "always"],
    "comma-spacing": "warn",
    "comma-style": "error",
    "computed-property-spacing": "error",
    "constructor-super": "error",
    "curly": ["warn", "multi-or-nest"],
    "dot-location": ["error", "property"],
    "dot-notation": "error",
    "eol-last": "error",
    "eqeqeq": "error",
    "func-call-spacing": "warn",
    "func-names": ["error", "as-needed"],
    "func-style": [
      "error",
      "declaration",
      {
        "allowArrowFunctions": true
      }
    ],
    "function-paren-newline": [
      "warn",
      {
        "minItems": 4
      }
    ],
    "import/no-duplicates": "error",
    "import/extensions": [
      "error",
      "always",
      {
        "js": "never",
        "jsx": "never"
      }
    ],
    "indent": [
      "warn",
      2,
      {
        "FunctionDeclaration": {
          "parameters": "first"
        },
        "FunctionExpression": {
          "parameters": "first"
        },
        "CallExpression": {
          "arguments": "first"
        },
        "ArrayExpression": "first",
        "ObjectExpression": "first",
        "ImportDeclaration": "first"
      }
    ],
    "jsx-quotes": ["error", "prefer-single"],
    "key-spacing": [
      "warn",
      {
        "align": {
          "beforeColon": true,
          "afterColon": true,
          "on": "colon"
        }
      }
    ],
    "keyword-spacing": "warn",
    "lines-around-directive": "error",
    "lines-between-class-members": "warn",
    "max-statements-per-line": [
      "error",
      {
        "max": 2
      }
    ],
    "new-cap": [
      "error",
      {
        "capIsNew": false
      }
    ],
    "newline-per-chained-call": "warn",
    "no-bitwise": "error",
    "no-class-assign": "error",
    "no-compare-neg-zero": "error",
    "no-cond-assign": "error",
    "no-const-assign": "error",
    "no-constant-condition": "error",
    "no-dupe-args": "error",
    "no-dupe-class-members": "error",
    "no-dupe-keys": "error",
    "no-duplicate-case": "error",
    "no-empty": "error",
    "no-empty-character-class": "error",
    "no-empty-function": "error",
    "no-empty-pattern": "error",
    "no-eq-null": "error",
    "no-ex-assign": "error",
    "no-extra-bind": "error",
    "no-extra-boolean-cast": "warn",
    "no-extra-parens": [
      "warn",
      "all",
      {
        "ignoreJSX": "multi-line"
      }
    ],
    "no-extra-semi": "error",
    "no-floating-decimal": "warn",
    "no-func-assign": "error",
    "no-global-assign": "error",
    "no-invalid-regexp": "error",
    "no-labels": "error",
    "no-lone-blocks": "error",
    "no-lonely-if": "warn",
    "no-loop-func": "error",
    "no-mixed-spaces-and-tabs": "error",
    "no-multi-assign": "error",
    "no-multi-spaces": ["off", { "exceptions": { "Property": true } }],
    "no-multi-str": "error",
    "no-multiple-empty-lines": [
      "warn",
      {
        "max": 1,
        "maxBOF": 0
      }
    ],
    "import/no-named-as-default": "off",
    "no-negated-condition": "error",
    "no-new-func": "error",
    "no-new-object": "error",
    "no-new-wrappers": "error",
    "no-obj-calls": "error",
    "no-octal": "error",
    "no-redeclare": "error",
    "no-regex-spaces": "error",
    "no-return-await": "error",
    "no-self-assign": "error",
    "no-self-compare": "error",
    "no-shadow-restricted-names": "error",
    "no-spaced-func": "warn",
    "no-sparse-arrays": "error",
    "no-template-curly-in-string": "error",
    "no-this-before-super": "error",
    "no-trailing-spaces": "warn",
    "no-undef": "error",
    "no-undef-init": "error",
    "no-undefined": "error",
    "no-unexpected-multiline": "error",
    "no-unmodified-loop-condition": "error",
    "no-unneeded-ternary": "error",
    "no-unreachable": "error",
    "no-unsafe-negation": "error",
    "no-unused-vars": "error",
    "no-use-before-define": "error",
    "no-useless-computed-key": "error",
    "no-useless-concat": "error",
    "no-useless-constructor": "error",
    "no-useless-escape": "error",
    "no-useless-rename": "error",
    "no-useless-return": "error",
    "no-var": "error",
    "no-whitespace-before-property": "error",
    "nonblock-statement-body-position": ["error", "beside"],
    "object-curly-newline": [
      "warn",
      {
        "multiline": true
      }
    ],
    "object-curly-spacing": ["warn", "always"],
    "object-property-newline": "warn",
    "object-shorthand": [
      "error",
      "always",
      {
        "avoidExplicitReturnArrows": true,
        "avoidQuotes": true
      }
    ],
    "one-var-declaration-per-line": ["warn", "always"],
    "operator-linebreak": "error",
    "padded-blocks": ["warn", "never"],
    "padding-line-between-statements": [
      "warn",
      {
        "blankLine": "always",
        "prev": ["const", "let", "var"],
        "next": "*"
      },
      {
        "blankLine": "any",
        "prev": ["const", "let", "var"],
        "next": ["const", "let", "var"]
      },
      {
        "blankLine": "always",
        "prev": ["expression"],
        "next": "*"
      },
      {
        "blankLine": "always",
        "prev": ["*"],
        "next": "expression"
      }
    ],
    "prefer-arrow-callback": "error",
    "prefer-const": "error",
    "prefer-destructuring": [
      "error",
      {
        "array": true,
        "object": true
      },
      {
        "enforceForRenamedProperties": false
      }
    ],
    "prefer-rest-params": "error",
    "prefer-spread": "error",
    "prefer-template": "warn",
    "quote-props": ["error", "as-needed"],
    "quotes": [
      "warn",
      "single",
      {
        "allowTemplateLiterals": true,
        "avoidEscape": true
      }
    ],
    "react/destructuring-assignment": ["error", "always"],
    "react/display-name": "off",
    "react/jsx-boolean-value": "error",
    "react/jsx-curly-brace-presence": [
      "error",
      {
        "props": "never",
        "children": "never"
      }
    ],
    "react/jsx-curly-spacing": [
      "warn",
      {
        "when": "always"
      }
    ],
    "react/jsx-equals-spacing": "warn",
    "react/jsx-first-prop-new-line": "error",
    "react/jsx-indent": ["warn", 2],
    "react/jsx-indent-props": ["warn", 2],
    "react/jsx-key": "error",
    "react/jsx-max-props-per-line": ["warn", { "maximum": 3 }],
    "react/jsx-no-duplicate-props": "error",
    "react/jsx-no-undef": "error",
    "react/jsx-pascal-case": "error",
    "react/jsx-sort-default-props": "error",
    "react/jsx-sort-props": [
      "warn",
      {
        "ignoreCase": true
      }
    ],
    "react/jsx-tag-spacing": "error",
    "react/jsx-uses-react": "error",
    "react/jsx-uses-vars": "error",
    "react/jsx-wrap-multilines": "error",
    "react/no-access-state-in-setstate": "error",
    "react/no-array-index-key": "warn",
    "react/no-deprecated": "error",
    "react/prop-types": "off",
    "react/no-direct-mutation-state": "error",
    "react/no-this-in-sfc": "error",
    "react/no-unescaped-entities": "error",
    "react/no-unknown-property": "error",
    "react/require-render-return": "error",
    "react/self-closing-comp": "error",
    "react/sort-comp": "error",
    "react/style-prop-object": "error",
    "require-await": "off",
    "rest-spread-spacing": ["error", "never"],
    "semi-spacing": "warn",
    "semi-style": "error",
    "semi": "warn",
    "sort-imports": "error",
    "sort-keys": [
      "error",
      "asc",
      {
        "caseSensitive": true,
        "natural": true
      }
    ],
    "sort-vars": "error",
    "space-before-blocks": "warn",
    "space-before-function-paren": "warn",
    "space-in-parens": ["warn", "always"],
    "space-infix-ops": "warn",
    "space-unary-ops": "error",
    "switch-colon-spacing": "error",
    "template-curly-spacing": ["error", "never"],
    "template-tag-spacing": "error",
    "use-isnan": "error",
    "valid-typeof": [
      "error",
      {
        "requireStringLiterals": true
      }
    ],
    "vars-on-top": "error",
    "yoda": "error"
  },
  "overrides": [
    {
      "files": ["server/**/*.js"],
      "env": { "node": true },
      "excludedFiles": "**/*.test.*",
      "rules": {
        "func-names": "off"
      }
    }
  ],
  "root": true,
  "settings": {
    "polyfills": ["fetch", "promise"],
    "import/resolver": {
      "babel-module": {},
      "webpack": {}
    }
  }
}