.eslintrc

{
  "parserOptions": {
    "sourceType": "module",
    "ecmaVersion": 2017
  },
  "env": {
    "browser": true,
    "es6": true,
    "node": true
  },
  "extends": [
    "eslint:recommended"
  ],
  "rules": {
    "arrow-spacing": "error",
    "brace-style": [
      "error",
      "1tbs",
      {
        "allowSingleLine": true
      }
    ],
    "comma-dangle": [
      "error",
      "never"
    ],
    "comma-spacing": [
      "error",
      {
        "before": false,
        "after": true
      }
    ],
    "complexity": [
      "warn",
      10
    ],
    "computed-property-spacing": [
      "error",
      "never"
    ],
    "consistent-return": "warn",
    "indent": "off",
    "indent-legacy": [
      "error",
      2
    ],
    "dot-notation": "warn",
    "eol-last": [
      "error",
      "always"
    ],
    "func-call-spacing": [
      "error",
      "never"
    ],
    "key-spacing": [
      "error",
      {
        "mode": "minimum",
        "beforeColon": false,
        "afterColon": true
      }
    ],
    "linebreak-style": [
      "error",
      "unix"
    ],
    "max-len": [
      "warn",
      100
    ],
    "max-lines": [
      "warn",
      {
        "max": 250,
        "skipBlankLines": true,
        "skipComments": true
      }
    ],
    "max-params": [
      "warn",
      4
    ],
    "max-statements": [
      "warn",
      30
    ],
    "new-parens": "error",
    "no-compare-neg-zero": "warn",
    "no-else-return": "warn",
    "no-empty": [
      "error",
      {
        "allowEmptyCatch": true
      }
    ],
    "no-floating-decimal": "error",
    "no-labels": "error",
    "no-lonely-if": "error",
    "no-multiple-empty-lines": [
      "error",
      {
        "max": 2,
        "maxBOF": 0,
        "maxEOF": 1
      }
    ],
    "no-multi-spaces": "off",
    "no-multi-str": "error",
    "no-nested-ternary": "error",
    "no-unused-vars": [
      "warn",
      "all"
    ],
    "no-useless-concat": "error",
    "no-var": "error",
    "object-curly-spacing": [
      "error",
      "always"
    ],
    "object-curly-newline": [
      "error",
      {
        "multiline": true,
        "consistent": true
      }
    ],
    "object-property-newline": [
      "error",
      {
        "allowMultiplePropertiesPerLine": true
      }
    ],
    "operator-linebreak": [
      "error",
      "before"
    ],
    "prefer-promise-reject-errors": "error",
    "prefer-const": "warn",
    "radix": [
      "error",
      "always"
    ],
    "semi": [
      "error",
      "always"
    ],
    "semi-style": [
      "error",
      "last"
    ],
    "semi-spacing": [
      "error",
      {
        "before": false,
        "after": true
      }
    ],
    "space-before-function-paren": [
      "error",
      "never"
    ],
    "spaced-comment": [
      "error",
      "always"
    ],
    "space-unary-ops": [
      "error",
      {
        "words": false,
        "nonwords": false
      }
    ],
    "strict": [
      "warn",
      "global"
    ],
    "quotes": [
      "warn",
      "single",
      {
        "allowTemplateLiterals": true
      }
    ],
    "quote-props": [
      "error",
      "as-needed"
    ],
    "valid-jsdoc": [
      "warn",
      {
        "requireReturn": false
      }
    ],
    "wrap-iife": [
      "error",
      "inside"
    ]
  }
}