.eslintrc.json

{
  "parserOptions": {
    "ecmaVersion": 2016,
    "sourceType": "module",
    "ecmaFeatures": {
      "jsx": true,
      "impliedStrict": true
    }
  },
  "env": {
    "browser": true,
    "node": true
  },
  "rules": {
    "no-cond-assign": [
      "error",
      "except-parens"
    ],
    "no-console": "warn",
    "no-constant-condition": "warn",
    "no-control-regex": "warn",
    "no-debugger": "warn",
    "no-dupe-args": "error",
    "no-dupe-keys": "error",
    "no-duplicate-case": "error",
    "no-empty-character-class": "error",
    "no-empty": "error",
    "no-ex-assign": "error",
    "no-extra-boolean-cast": "error",
    "no-extra-semi": "error",
    "no-func-assign": "error",
    "no-inner-declarations": [
      "error",
      "both"
    ],
    "no-invalid-regexp": "error",
    "no-irregular-whitespace": "error",
    "no-negated-in-lhs": "error",
    "no-obj-calls": "error",
    "no-regex-spaces": "error",
    "no-sparse-arrays": "error",
    "no-unreachable": "error",
    "use-isnan": "error",
    "valid-typeof": "error",
    "no-unexpected-multiline": "error",
    "complexity": [
      "warn",
      10
    ],
    "consistent-return": "error",
    "dot-notation": "error",
    "dot-location": [
      "error",
      "property"
    ],
    "eqeqeq": "error",
    "no-caller": "error",
    "no-labels": "error",
    "no-eval": "error",
    "no-extend-native": "error",
    "no-extra-bind": "error",
    "no-fallthrough": "warn",
    "no-implied-eval": "error",
    "no-invalid-this": "warn",
    "no-iterator": "error",
    "no-lone-blocks": "error",
    "no-loop-func": "error",
    "no-multi-spaces": "error",
    "no-multi-str": "error",
    "no-native-reassign": "error",
    "no-new-func": "error",
    "no-new-wrappers": "error",
    "no-new": "error",
    "no-octal": "error",
    "no-param-reassign": [
      "error",
      {
        "props": false
      }
    ],
    "no-process-env": "error",
    "no-proto": "error",
    "no-redeclare": "error",
    "no-return-assign": [
      "error",
      "except-parens"
    ],
    "no-script-url": "error",
    "no-self-compare": "error",
    "no-unused-expressions": ["warn", {"allowShortCircuit": true}],
    "no-useless-call": "error",
    "no-void": "error",
    "no-with": "error",
    "no-catch-shadow": "error",
    "no-label-var": "error",
    "no-shadow-restricted-names": "error",
    "no-undef": "error",
    "no-use-before-define": [
      "error",
      "nofunc"
    ],
    "no-mixed-requires": "error",
    "no-new-require": "error",
    "brace-style": [
      "error",
      "1tbs",
      {
        "allowSingleLine": true
      }
    ],
    "camelcase": [
      "error",
      {
        "properties": "always"
      }
    ],
    "comma-spacing": [
      "error",
      {
        "after": true
      }
    ],
    "comma-style": "error",
    "consistent-this": [
      "error",
      "\"self\""
    ],
    "indent": [
      "error",
      4
    ],
    "key-spacing": [
      "error",
      {
        "afterColon": true
      }
    ],
    "new-cap": [
      "error",
      {
        "newIsCap": true,
        "capIsNew": true
      }
    ],
    "no-mixed-spaces-and-tabs": "error",
    "no-multiple-empty-lines": [
      "error",
      {
        "max": 2
      }
    ],
    "no-new-object": "error",
    "no-spaced-func": "error",
    "no-unneeded-ternary": "error",
    "operator-linebreak": [
      "error",
      "after"
    ],
    "semi": [
      "error",
      "always"
    ],
    "keyword-spacing": "error",
    "space-before-blocks": [
      "error",
      "always"
    ],
    "space-before-function-paren": [
      "error",
      "never"
    ],
    "space-in-parens": [
      "error",
      "never"
    ],
    "space-unary-ops": [
      "error",
      {
        "words": true
      }
    ],
    "arrow-spacing": [
      "error",
      {
        "before": true,
        "after": true
      }
    ],
    "constructor-super": "error",
    "no-class-assign": "error",
    "no-const-assign": "error",
    "no-this-before-super": "error",
    "no-var": "error",
    "prefer-const": "error",
    "prefer-spread": "error",
    "require-yield": "error"
  }
}