.eslintrc

{
  "plugins": [
    "babel"
  ],
  "parser": "babel-eslint",
  "parserOptions": {
    "ecmaVersion": 2017,
    "allowImportExportEverywhere": true,
    "sourceType": "module",
    "ecmaFeatures": {
      "experimentalObjectRestSpread": true
    }
  },
  "env": {
    "es6": true,
    "browser": true,
    "node": true,
    "mocha": true
  },
  "overrides": [
    {
      "files": ["**/__tests__/*.js"],
      "env": {
        "jest": true
      },
      "plugins": [
        "jest"
      ]
    }
  ],
  "rules": {
    "array-callback-return": "warn",
    "camelcase": "warn",
    "comma-dangle": "warn",
    "curly": "warn",
    "default-case": [
      "warn",
      {
        "commentPattern": "^no default$"
      }
    ],
    "dot-location": [
      "warn",
      "property"
    ],
    "eol-last": "warn",
    "eqeqeq": [
      "warn",
      "always"
    ],
    "indent": [
      "warn",
      2,
      {
        "SwitchCase": 1
      }
    ],
    "guard-for-in": "warn",
    "keyword-spacing": "warn",
    "new-parens": "warn",
    "no-array-constructor": "warn",
    "no-caller": "warn",
    "no-cond-assign": [
      "warn",
      "always"
    ],
    "no-const-assign": "warn",
    "no-control-regex": "warn",
    "no-delete-var": "warn",
    "no-dupe-args": "warn",
    "no-dupe-class-members": "warn",
    "no-dupe-keys": "warn",
    "no-duplicate-case": "warn",
    "no-empty-character-class": "warn",
    "no-empty-pattern": "warn",
    "no-eval": "warn",
    "no-ex-assign": "warn",
    "no-extend-native": "warn",
    "no-extra-bind": "warn",
    "no-extra-label": "warn",
    "no-fallthrough": "warn",
    "no-func-assign": "warn",
    "no-global-assign": "warn",
    "no-implied-eval": "warn",
    "no-invalid-regexp": "warn",
    "no-iterator": "warn",
    "no-label-var": "warn",
    "no-labels": [
      "warn",
      {
        "allowLoop": false,
        "allowSwitch": false
      }
    ],
    "no-lone-blocks": "warn",
    "no-loop-func": "warn",
    "no-mixed-operators": [
      "warn",
      {
        "groups": [
          [
            "&",
            "|",
            "^",
            "~",
            "<<",
            ">>",
            ">>>"
          ],
          [
            "==",
            "!=",
            "===",
            "!==",
            ">",
            ">=",
            "<",
            "<="
          ],
          [
            "&&",
            "||"
          ],
          [
            "in",
            "instanceof"
          ]
        ],
        "allowSamePrecedence": false
      }
    ],
    "no-multi-str": "warn",
    "no-new-func": "warn",
    "no-new-object": "warn",
    "no-new-symbol": "warn",
    "no-new-wrappers": "warn",
    "no-obj-calls": "warn",
    "no-octal": "warn",
    "no-octal-escape": "warn",
    "no-redeclare": "warn",
    "no-regex-spaces": "warn",
    "no-restricted-syntax": [
      "warn",
      "LabeledStatement",
      "WithStatement"
    ],
    "no-script-url": "warn",
    "no-self-assign": "warn",
    "no-self-compare": "warn",
    "no-sequences": "warn",
    "no-shadow-restricted-names": "warn",
    "no-sparse-arrays": "warn",
    "no-template-curly-in-string": "warn",
    "no-this-before-super": "warn",
    "no-throw-literal": "warn",
    "no-undef": "warn",
    "no-unexpected-multiline": "warn",
    "no-unreachable": "warn",
    "no-unsafe-negation": "warn",
    "no-unused-expressions": "warn",
    "no-unused-labels": "warn",
    "no-unused-vars": [
      "warn",
      {
        "vars": "local",
        "args": "none",
        "ignoreRestSiblings": true
      }
    ],
    "no-use-before-define": [
      "warn",
      "nofunc"
    ],
    "no-useless-computed-key": "warn",
    "no-useless-concat": "warn",
    "no-useless-constructor": "warn",
    "no-useless-escape": "warn",
    "no-useless-rename": [
      "warn",
      {
        "ignoreDestructuring": false,
        "ignoreImport": false,
        "ignoreExport": false
      }
    ],
    "no-with": "warn",
    "no-whitespace-before-property": "warn",
    "object-curly-spacing": [
      "warn",
      "always"
    ],
    "operator-assignment": [
      "warn",
      "always"
    ],
    "radix": "warn",
    "require-yield": "warn",
    "rest-spread-spacing": [
      "warn",
      "never"
    ],
    "semi": "warn",
    "strict": [
      "warn",
      "never"
    ],
    "unicode-bom": [
      "warn",
      "never"
    ],
    "use-isnan": "warn",
    "valid-typeof": "warn"
  }
}