.eslintrc

{
  "env": {
    "commonjs": true,
    "es6": true,
    "node": true,
    "mocha": true
  },
  "extends": "eslint:recommended",
  "parserOptions": {
    "ecmaVersion": 2018
  },
  "rules": {
    "array-bracket-newline": ["warn", "consistent"],
    "array-bracket-spacing": ["warn", "never"],
    "array-element-newline": ["warn", "consistent"],
    "arrow-body-style": ["warn", "as-needed"],
    "arrow-parens": ["warn", "as-needed"],
    "arrow-spacing": ["warn", { "before": true, "after": true }],
    "block-spacing": ["warn", "always"],
    "brace-style": ["warn", "1tbs", { "allowSingleLine": true }],
    "camelcase": ["warn", { "properties": "always" }],
    "comma-dangle": ["warn", "never"],
    "comma-spacing": ["warn", { "before": false, "after": true }],
    "comma-style": ["warn", "last"],
    "computed-property-spacing": ["warn", "never"],
    "curly": "warn",
    "dot-notation": ["warn", { "allowKeywords": true, "allowPattern": "^[a-z]+(_[a-z]+)+$" }],
    "eol-last": ["warn", "always"],
    "eqeqeq": ["warn", "smart"],
    "func-call-spacing": ["warn", "never"],
    "function-call-argument-newline": ["warn", "consistent"],
    "function-paren-newline": ["warn", "consistent"],
    "implicit-arrow-linebreak": ["warn", "beside"],
    "indent": ["warn", 2, { "SwitchCase": 1 }],
    "key-spacing": ["warn", { "beforeColon": false, "afterColon": true, "mode": "strict" }],
    "keyword-spacing": ["warn", { "before": true, "after": true }],
    "lines-between-class-members": ["warn", "always"],
    "max-len": ["warn", { "code": 120 }],
    "new-parens": ["warn", "always"],
    "no-dupe-else-if": "warn",
    "no-else-return": ["warn", { "allowElseIf": true }],
    "no-lonely-if": "warn",
    "no-multi-spaces": "warn",
    "no-multiple-empty-lines": ["warn", { "max": 1, "maxEOF": 0, "maxBOF": 0 }],
    "no-trailing-spaces": ["warn", { "skipBlankLines": false, "ignoreComments": false }],
    "no-unneeded-ternary": "warn",
    "no-useless-return": "warn",
    "no-var": "warn",
    "no-whitespace-before-property": "warn",
    "no-control-regex": "off",
    "nonblock-statement-body-position": ["warn", "beside"],
    "object-curly-newline": ["warn", { "consistent": true }],
    "object-curly-spacing": ["warn", "always", { "objectsInObjects": true }],
    "object-property-newline": ["warn", { "allowAllPropertiesOnSameLine": true }],
    "operator-assignment": "warn",
    "operator-linebreak": ["warn", "after"],
    "padded-blocks": ["warn", "never"],
    "padding-line-between-statements": ["warn", { "blankLine": "always", "prev": "*", "next": "return" }],
    "prefer-const": "warn",
    "quote-props": ["warn", "as-needed"],
    "quotes": ["warn", "single"],
    "rest-spread-spacing": ["warn", "never"],
    "semi": ["warn", "always"],
    "semi-spacing": ["warn", { "before": false, "after": true }],
    "semi-style": ["warn", "last"],
    "space-before-blocks": ["warn", "always"],
    "space-before-function-paren": ["warn", { "named": "never" }],
    "space-in-parens": ["warn", "never"],
    "space-infix-ops": "warn",
    "space-unary-ops": ["warn", { "words": true, "nonwords": false }],
    "spaced-comment": "warn",
    "strict": "warn",
    "switch-colon-spacing": ["warn", { "after": true, "before": false }],
    "yoda": ["warn", "never"]
  }
}