.eslintrc.json

{
  "extends": [
    "eslint:recommended",
    "plugin:import/errors",
    "plugin:jest/recommended"
  ],
  "parser": "babel-eslint",
  "parserOptions": {
    "ecmaVersion": 7,
    "sourceType": "module",
    "codeFrame": false
  },
  "env": {
    "es6": true,
    "node": true,
    "jest": true
  },
  "rules": {
    "no-constant-condition": "off",
    "no-empty": ["error", {
      "allowEmptyCatch": true
    }],
    "array-callback-return": "error",
    "curly": "error",
    "dot-location": ["error", "property"],
    "eqeqeq": "error",
    "no-alert": "error",
    "no-caller": "error",
    "no-eval": "error",
    "no-extend-native": "error",
    "no-floating-decimal": "error",
    "no-implicit-globals": "error",
    "no-implicit-coercion": "error",
    "no-implied-eval": "error",
    "no-iterator": "error",
    "no-loop-func": "error",
    "no-multi-spaces": "error",
    "no-proto": "error",
    "no-return-assign": "error",
    "no-return-await": "error",
    "no-self-compare": "error",
    "no-sequences": "error",
    "no-throw-literal": "error",
    "no-useless-call": "error",
    "no-useless-concat": "error",
    "no-useless-escape": "error",
    "no-useless-return": "error",
    "no-void": "error",
    "no-warning-comments": "warn",
    "no-with": "error",
    "prefer-promise-reject-errors": "error",
    "wrap-iife": "error",
    "yoda": "error",
    "no-undef-init": "error",
    "no-use-before-define": [
      "error",
      {
        "functions": false,
        "classes": false,
        "variables": true
      }
    ],
    "global-require": "error",
    "array-bracket-spacing": "error",
    "block-spacing": "error",
    "brace-style": "error",
    "camelcase": "error",
    "comma-dangle": ["error", {
      "arrays": "always-multiline",
      "objects": "always-multiline",
      "imports": "never",
      "exports": "never",
      "functions": "never"
    }],
    "comma-spacing": "error",
    "comma-style": "error",
    "computed-property-spacing": "error",
    "consistent-this": ["error", "self"],
    "eol-last": "error",
    "func-call-spacing": "error",
    "indent": ["error", 2, {
      "SwitchCase": 1
    }],
    "jsx-quotes": "error",
    "key-spacing": "error",
    "keyword-spacing": "error",
    "linebreak-style": "error",
    "lines-around-directive": "error",
    "max-depth": ["error", 4],
    "max-len": ["error", {
      "code": 80,
      "ignoreStrings": true
    }],
    "max-params": ["error", 5],
    "new-cap": "error",
    "new-parens": "error",
    "no-lonely-if": "error",
    "no-mixed-operators": "error",
    "no-multi-assign": "error",
    "no-multiple-empty-lines": ["error", {
      "max": 2,
      "maxEOF": 0
    }],
    "no-nested-ternary": "error",
    "no-tabs": "error",
    "no-trailing-spaces": "error",
    "no-unneeded-ternary": "error",
    "no-whitespace-before-property": "error",
    "object-curly-spacing": ["error", "always"],
    "one-var-declaration-per-line": "error",
    "operator-linebreak": ["error", "after"],
    "quote-props": ["error", "as-needed"],
    "quotes": ["error", "single"],
    "semi": ["error", "never"],
    "space-before-blocks": ["error", "always"],
    "space-before-function-paren": ["error", {
      "anonymous": "never",
      "named": "never",
      "asyncArrow": "always"
    }],
    "space-in-parens": "error",
    "space-infix-ops": "error",
    "space-unary-ops": ["error", {
      "words": true,
      "nonwords": false
    }],
    "spaced-comment": "error",
    "template-tag-spacing": "error",
    "unicode-bom": "error",
    "arrow-parens": "error",
    "arrow-spacing": "error",
    "generator-star-spacing": ["error", "after"],
    "no-class-assign": "error",
    "no-confusing-arrow": "error",
    "no-duplicate-imports": "error",
    "no-new-symbol": "error",
    "no-useless-computed-key": "error",
    "no-useless-constructor": "error",
    "no-var": "error",
    "prefer-arrow-callback": ["error", {
      "allowNamedFunctions": true
    }],
    "prefer-rest-params": "error",
    "prefer-template": "error",
    "rest-spread-spacing": "error",
    "symbol-description": "error",
    "template-curly-spacing": "error",
    "yield-star-spacing": "error",
    "import/newline-after-import": ["error", {
      "count": 2
    }],
    "import/order": ["error"]
  }
}