.eslintrc.js

module.exports = {
    "extends": "google",
    "parserOptions": {
        "ecmaVersion": 2017,
        "ecmaFeatures": {
            "legacyDecorators": true
        },
        "sourceType": "module"
    },
    "env": {
        "commonjs": true,
        "es6": true,
        "node": true,
        "mocha": true
    },
    "rules": {
        "max-len": ["error", {
            "code": 140,
            "tabWidth": 4,
            "ignoreRegExpLiterals": true,
            "ignoreTemplateLiterals": true,
            "ignoreStrings": true,
            "ignoreUrls": true,
            "ignoreTrailingComments": true,
            "ignoreComments": true,
            "ignorePattern": "^\\s*var\\s.+=\\s*require\\s*\\("
        }],
        "no-invalid-this": 0,
        "capIsNew": 0,
        "require-jsdoc": 0,
        "new-cap": 0,
        "valid-jsdoc": 0,
        "no-console": ["warn"],
        "arrow-spacing": 2,
        "arrow-parens": 2,
        "semi": 2,
        "no-dupe-class-members": 2,
        "no-new-wrappers": 2,
        "space-before-blocks": 2,
        "array-bracket-spacing": 2,
        "object-curly-spacing": 0,
        "comma-style": 2,
        "block-spacing": 2,
        "no-multiple-empty-lines": 2,
        "key-spacing": 2,
        "computed-property-spacing": 2,
        "comma-spacing": 2,
        "spaced-comment": 2,
        "space-in-parens": 2,
        "space-infix-ops": 2,
        "nonblock-statement-body-position": 2,
        "brace-style": 2,
        "no-mixed-operators": 2,
        "no-param-reassign": 2,
        "no-duplicate-imports": 2,
        "prefer-arrow-callback": 2,
        "no-alert": 2,
        "no-array-constructor": 2,
        "no-caller": 2,
        "no-catch-shadow": 2,
        "no-extend-native": 2,
        "no-extra-bind": 2,
        "no-implied-eval": 2,
        "no-iterator": 2,
        "no-label-var": 2,
        "no-labels": 2,
        "no-lone-blocks": 2,
        "no-loop-func": 2,
        "no-multi-spaces": 2,
        "no-multi-str": 2,
        "no-native-reassign": 2,
        "no-new": 2,
        "no-new-func": 2,
        "no-new-object": 2,
        "no-octal-escape": 2,
        "no-proto": 2,
        "no-return-assign": 2,
        "no-script-url": 2,
        "no-sequences": 2,
        "no-shadow": 2,
        "no-shadow-restricted-names": 2,
        "no-spaced-func": 2,
        "no-trailing-spaces": 2,
        "no-undef-init": 2,
        "no-underscore-dangle": 0,
        "no-unused-expressions": 2,
        "no-use-before-define": 2,
        "no-with": 2,
        "camelcase": 2,
        "consistent-return": 2,
        "curly": [2, "all"],
        "dot-notation": [2, { "allowKeywords": true }],
        "eol-last": 2,
        "no-extra-parens": [2, "functions"],
        "eqeqeq": 2,
        "new-parens": 2,
        "space-unary-ops": [2, { "words": true, "nonwords": false }],
        "yoda": [2, "never"],
        "no-eval": ["error", {"allowIndirect": true}],
        "indent": [
            "error", 4, {
              "CallExpression": {
                "arguments": 2,
              },
              "FunctionDeclaration": {
                "body": 1,
                "parameters": "first",
              },
              "FunctionExpression": {
                "body": 1,
                "parameters": "first",
              },
              "ArrayExpression": "first",
              "ObjectExpression": 1,
              "SwitchCase": 1,
              "ignoredNodes": [
                "ConditionalExpression",
                "MemberExpression"
              ],
            },
          ]
    },
};