.eslintrc.json

{
    "env": {
        "es6": true,
        "node": true
   },
    "extends": "eslint:recommended",
    "parserOptions": {
      "ecmaVersion": 8,
      "sourceType": "module"
    },
    "rules": {
    "strict": ["error", "global"],
    "indent": [2, "tab"],
    "curly": [2, "all"],
    "quotes": [2, "single"],
    "max-len": [1, 100],
    "prefer-const": 0,
    "no-console": ["error", { "allow": ["warn", "error", "log"] }],
    "no-mixed-spaces-and-tabs": 2,
    "no-multiple-empty-lines": [1, {"max": 1}],
    "no-new-object": 2,
    "no-trailing-spaces": [2, {"skipBlankLines": false}],
    "no-empty": 2,
    "no-cond-assign": [2, "always"],
    "no-alert": 2,
    "no-caller": 2,
    "no-labels": 2,
    "no-eval": 2,
    "no-fallthrough": 2,
    "default-case": 2,
    "key-spacing": [2, {
      "beforeColon": false,
      "afterColon": true
    }],
    "keyword-spacing": ["error", {"before": true, "after": true}],
    "space-before-function-paren": [2, "always"],
    "space-before-blocks": [2, "always"],
    "eqeqeq": 2,
    "no-unused-vars": ["error", { "args": "none" }],
    "space-in-parens": ["error", "never"]
  }
}