.eslintrc.json

{
    "extends": [
      "eslint:recommended"
    ],
    "parserOptions": {
      "ecmaVersion": 6,
      "sourceType": "module"
    },
    "env": {
      "browser": true,
      "node": true,
      "es6": true
    },
    "globals": {
    },
    "plugins": [
    ],
    "rules": {
      "brace-style": "error",
      "comma-spacing": "error",
      "eqeqeq": "error",
      "func-call-spacing": "error",
      "indent": ["error", 2, {
        "MemberExpression": 1,
        "SwitchCase" : 1,
        "VariableDeclarator": { "var": 2, "let": 2, "const": 3 }
      }],
      "key-spacing": "error",
      "keyword-spacing": "error",
      "no-array-constructor": "error",
      "no-extra-parens": "error",
      "no-extra-semi": "error",
      "no-multi-spaces": "error",
      "no-unused-vars": ["error", {
        "args": "none"
      }],
      "no-useless-escape": "off",
      "no-whitespace-before-property": "error",
      "object-curly-spacing": ["error", "always"],
      "object-shorthand": ["error", "methods"],
      "semi": ["error", "always"],
      "semi-spacing": "error",
      "space-before-function-paren": ["error", "never"],
      "space-in-parens": "error",
      "space-infix-ops": "error",

      "no-var": 1,
      "no-console": "off",
      "max-nested-callbacks": [1, 3],
      "max-len": [1, 200, 2],
      "max-params": [1, 4],
      "max-statements": [1, 60],
      "no-underscore-dangle": 0
    }
  }