.eslintrc.json

{
    "env": {
          "node": true,
          "es6": true
    },
    "parserOptions": {
      "ecmaVersion": 2017
    },
    "rules": {
          /* Possible Errors */
          "no-extra-boolean-cast": "error",

          /* Best Practices */
          "eqeqeq":"error",
          "no-empty-function":"error",
          "no-eval": "error",
          "no-useless-concat": "error",
          "no-useless-return": "error",
          "no-with": "error",
          "prefer-promise-reject-errors": "warn",

          /* Strict Mode */
          "strict": "off",

          /* Variables */
          "no-unused-vars": "error",
          "no-use-before-define": "error",

          /* Node.js and CommonJS */
          "callback-return": "error",
          "handle-callback-err":"error",
          "no-path-concat":"error",
          "no-process-exit":"error",

          /* Stylistic Issues */
          "array-bracket-spacing": "error",
          "block-spacing": "error",
          "brace-style": ["error", "1tbs", { "allowSingleLine": true }],
          "camelcase": "off",
          "comma-dangle":"error",
          "comma-spacing": ["error", { "before": false, "after": true }],
          "comma-style": ["error", "last"],
          "eol-last":"error",
          "func-call-spacing": ["error", "never"],
          "indent": ["error", 4, {"MemberExpression": 0}],
          "linebreak-style": ["warn", "unix"],
          "max-depth": ["error", 3],
          "max-nested-callbacks": ["error", 4],
          "new-parens": "error",
          "newline-per-chained-call": "warn",
          "no-mixed-spaces-and-tabs": "error",
          "no-multiple-empty-lines": ["error", { "max": 1, "maxEOF": 1 }],
          "no-tabs": "error",
          "no-trailing-spaces": "error",
          "no-whitespace-before-property": "off",
          "object-curly-spacing": ["error", "always"],

          "object-property-newline": "warn",
          "padded-blocks": ["error", "never"],
          "quotes": ["warn", "single"],
          "semi":["error", "never"],
          "space-before-function-paren": "error",
          "switch-colon-spacing": ["error", {"after": true, "before": false}],

          /* ECMAScript 6 */
          "arrow-body-style": ["error", "always"],
          "arrow-parens": ["error", "always"],
          "arrow-spacing": ["error", { "before": true, "after": true }],
          "prefer-const":"warn"

    }
  }