.eslintrc

{
  "parserOptions": {
    "ecmaVersion": 2018,
    "sourceType":  "module"
  },
  "extends": "eslint:recommended",
  "rules": {
    "no-alert": "error",
    "no-array-constructor": "error",
    "no-caller": "error",
    "no-catch-shadow": "error",
    "no-console": "error",
    "no-eval": "error",
    "no-extend-native": "error",
    "no-extra-bind": "error",
    "no-implied-eval": "error",
    "no-iterator": "error",
    "no-label-var": "error",
    "no-labels": "error",
    "no-lone-blocks": "error",
    "no-loop-func": "error",
    "no-multi-str": "error",
    "no-native-reassign": "error",
    "no-new": "error",
    "no-new-func": "error",
    "no-new-object": "error",
    "no-new-wrappers": "error",
    "no-octal-escape": "error",
    "no-proto": "error",
    "no-return-assign": "error",
    "no-script-url": "error",
    "no-sequences": "error",
    "no-shadow": "error",
    "no-shadow-restricted-names": "error",
    "no-spaced-func": "error",
    "no-undef-init": "error",
    "no-unused-expressions": "error",
    "no-unused-vars": ["error", { "ignoreRestSiblings" : true }],
    "no-with": "error",
    "camelcase": "error",
    "comma-spacing": "error",
    "consistent-return": "error",
    "eqeqeq": "error",
    "semi": "error",
    "semi-spacing": ["error", {"before": false, "after": true}],
    "space-infix-ops": "error",
    "space-unary-ops": ["error", { "words": true, "nonwords": false }],
    "yoda": ["error", "never"],
    "brace-style": ["error", "stroustrup", { "allowSingleLine": false }],
    "eol-last": "error",
    "indent": ["error", 4, { "SwitchCase": 1 }],
    "key-spacing": ["error", { "align": "value" }],
    "max-nested-callbacks": ["error", 3],
    "new-parens": "error",
    "newline-after-var": ["error", "always"],
    "no-lonely-if": "error",
    "no-multiple-empty-lines":  ["error", { "max": 2 }],
    "no-nested-ternary": "error",
    "no-underscore-dangle": "off",
    "no-unneeded-ternary": "error",
    "object-curly-spacing": ["error", "always"],
    "operator-assignment": ["error", "always"],
    "quotes": ["error", "single", "avoid-escape"],
    "keyword-spacing" : "error",
    "space-before-blocks": ["error", "always"],
    "prefer-const": "error",
    "no-path-concat": "error",
    "no-undefined": "error",
    "strict": "off",
    "curly": ["error", "multi-or-nest"],
    "dot-notation": "off",
    "no-else-return": "error",
    "one-var": ["error", "never"],
    "no-multi-spaces": ["error", {
      "exceptions": {
        "VariableDeclarator": true,
        "AssignmentExpression": true
      }
    }],
    "radix": "error",
    "no-extra-parens": "error",
    "new-cap": ["error", { "capIsNew": false }],
    "space-before-function-paren": ["error", "always"],
    "no-use-before-define" : ["error", "nofunc"],
    "handle-callback-err": "off"
  },
  "env": {
    "node": true
  }
}