Eslint Setup

.eslintignore

/node_modules
/coverage
/flow-typed/npm
/src/registerServiceWorker.js
*.json

.eslintrc.json

{
  "parserOptions": {
    "ecmaVersion": 6,
    "sourceType": "module",
    "ecmaFeatures": {
      "modules": true
    }
  },
  "parser": "babel-eslint",
  "extends": ["plugin:flowtype/recommended", "plugin:react/recommended"],
  "plugins": ["babel", "flowtype", "react"],
  "env": {
    "browser": true,
    "node": true
  },
  "globals": {
    "fetch": false,
    "FormData": false,
    "ImageSource": false,
    "Map": false,
    "Set": false,
    "StyleSet": false,
    "ReactNode": false,
    "Promise": false,
    "navigator": false,
    "describe": false,
    "it": false,
    "expect": false,
    "jest": false,
    "beforeAll": false,
    "beforeEach": false
  },
  "rules": {
    "flowtype/delimiter-dangle": [1, "always-multiline"],
    "flowtype/no-dupe-keys": 2,
    "flowtype/object-type-delimiter": [1, "semicolon"],
    "flowtype/semi": 1,
    "flowtype/type-id-match": [1, "^[A-Z]"],
    "no-cond-assign": 1,
    "no-console": 0,
    "no-constant-condition": 1,
    "comma-dangle": [
      1,
      {
        "arrays": "always-multiline",
        "objects": "always-multiline",
        "imports": "always-multiline",
        "exports": "always-multiline",
        "functions": "always-multiline"
      }
    ],
    "no-control-regex": 1,
    "no-debugger": 1,
    "no-dupe-keys": 1,
    "no-dupe-args": 1,
    "no-duplicate-case": 1,
    "no-empty": 0,
    "no-empty-character-class": 1,
    "no-ex-assign": 1,
    "no-extra-boolean-cast": 1,
    "no-extra-semi": 1,
    "no-func-assign": 1,
    "no-inner-declarations": 0,
    "no-invalid-regexp": 1,
    "no-negated-in-lhs": 1,
    "no-obj-calls": 1,
    "no-regex-spaces": 1,
    "no-reserved-keys": 0,
    "no-sparse-arrays": 1,
    "no-unreachable": 1,
    "use-isnan": 1,
    "valid-jsdoc": 0,
    "valid-typeof": 1,

    "block-scoped-var": 0,
    "complexity": 0,
    "consistent-return": 0,
    "curly": 1,
    "default-case": 0,
    "dot-notation": 0,
    "eqeqeq": [1, "allow-null"],
    "guard-for-in": 1,
    "no-alert": 1,
    "no-caller": 1,
    "no-div-regex": 1,
    "no-else-return": 0,
    "no-eq-null": 0,
    "no-eval": 1,
    "no-extend-native": 1,
    "no-extra-bind": 1,
    "no-fallthrough": 1,
    "no-floating-decimal": 1,
    "no-implied-eval": 1,
    "no-labels": 1,
    "no-iterator": 1,
    "no-lone-blocks": 1,
    "no-loop-func": 0,
    "no-multi-str": 0,
    "no-native-reassign": 0,
    "no-new": 1,
    "no-new-func": 1,
    "no-new-wrappers": 1,
    "no-octal": 1,
    "no-octal-escape": 1,
    "no-proto": 1,
    "no-redeclare": 1,
    "no-return-assign": 1,
    "no-script-url": 1,
    "no-self-compare": 1,
    "no-sequences": 1,
    "no-unused-expressions": 0,
    "no-void": 1,
    "no-warning-comments": 0,
    "no-with": 1,
    "radix": 1,
    "vars-on-top": 0,
    "wrap-iife": 0,
    "yoda": 1,
    "strict": 0,

    "no-catch-shadow": 1,
    "no-delete-var": 1,
    "no-label-var": 1,
    "no-shadow": 0,
    "no-shadow-restricted-names": 1,
    "no-undef": 1,
    "no-undefined": 0,
    "no-undef-init": 0,
    "no-unused-vars": 1,
    "no-use-before-define": 0,

    "handle-callback-err": 1,
    "no-mixed-requires": 1,
    "no-new-require": 1,
    "no-path-concat": 1,
    "no-process-exit": 0,
    "no-restricted-modules": 1,
    "no-sync": 0,

    "jsx-quotes": [1, "prefer-double"],
    "react/jsx-closing-bracket-location": [1],

    "react/jsx-indent": 0,
    "react/jsx-tag-spacing": [
      1,
      {
        "beforeSelfClosing": "always"
      }
    ],
    "react/jsx-equals-spacing": 1,
    "react/jsx-curly-spacing": [1, "never"],

    "key-spacing": 1,
    "comma-spacing": 1,
    "no-multi-spaces": 1,
    "brace-style": [
      1,
      "1tbs",
      {
        "allowSingleLine": false
      }
    ],
    "camelcase": [1, {"properties": "never"}],
    "consistent-this": [1, "self"],
    "eol-last": 1,
    "func-names": 0,
    "func-style": 0,
    "new-cap": 0,
    "new-parens": 1,
    "no-nested-ternary": 0,
    "no-array-constructor": 1,
    "no-lonely-if": 0,
    "no-new-object": 1,
    "no-spaced-func": 1,
    "semi-spacing": 1,
    "no-ternary": 0,
    "no-trailing-spaces": 1,
    "no-underscore-dangle": 0,

    "no-mixed-spaces-and-tabs": 1,
    "indent": 0,
    "quotes": [
      1,
      "single",
      {"avoidEscape": true, "allowTemplateLiterals": true}
    ],
    "quote-props": [1, "as-needed"],
    "semi": 1,
    "sort-vars": 0,
    "keyword-spacing": 1,
    "space-before-blocks": 1,
    "space-before-function-paren": [
      1,
      {
        "anonymous": "never",
        "named": "never",
        "asyncArrow": "always"
      }
    ],
    "babel/object-curly-spacing": [1, "never"],
    "array-bracket-spacing": [1, "never"],
    "space-in-parens": 1,
    "space-infix-ops": 1,
    "space-unary-ops": 1,
    "max-nested-callbacks": 0,
    "one-var": [1, "never"],
    "wrap-regex": 0,
    "arrow-parens": 1,
    "arrow-spacing": 1,
    "constructor-super": 1,
    "generator-star-spacing": 0,
    "no-class-assign": 1,
    "no-const-assign": 1,
    "no-dupe-class-members": 1,
    "no-this-before-super": 1,
    "no-var": 0,
    "object-shorthand": 0,
    "prefer-arrow-callback": 1,
    "prefer-const": 0,
    "prefer-reflect": 0,
    "prefer-spread": 0,
    "prefer-template": 0,
    "require-yield": 0,
    "max-depth": 0,

    "max-params": 0,
    "max-statements": 0,
    "no-bitwise": 0,
    "no-plusplus": 0
  }
}