.eslintrc.json

{
  "extends": [
    "eslint:recommended"
  ],
  "parserOptions": {
    "ecmaVersion": 2020
  },
  "env": {
    "node": true,
    "es6": true
  },
  "rules": {
    "comma-style": "error",
    "indent": [
      "error",
      2,
      {
        "SwitchCase": 1,
        "VariableDeclarator": 2
      }
    ],
    "keyword-spacing": "error",
    "no-whitespace-before-property": "error",
    "no-buffer-constructor": "warn",
    "no-console": "off",
    "no-multi-spaces": "error",
    "no-constant-condition": "off",
    "func-call-spacing": "error",
    "no-trailing-spaces": "error",
    "no-undef": "error",
    "no-unneeded-ternary": "error",
    "no-const-assign": "error",
    "no-useless-rename": "error",
    "no-dupe-keys": "error",
    "space-in-parens": [
      "error",
      "never"
    ],
    "spaced-comment": [
      "error",
      "always",
      {
        "block": {
          "markers": [
            "!"
          ],
          "balanced": true
        }
      }
    ],
    "key-spacing": [
      "error",
      {
        "beforeColon": false,
        "afterColon": true
      }
    ],
    "comma-spacing": [
      "error",
      {
        "before": false,
        "after": true
      }
    ],
    "array-bracket-spacing": 1,
    "arrow-spacing": [
      "error",
      {
        "before": true,
        "after": true
      }
    ],
    "object-curly-spacing": [
      "error",
      "always"
    ],
    "comma-dangle": [
      "error",
      "never"
    ],
    "no-unreachable": "error",
    "quotes": [
      "error",
      "single"
    ],
    "quote-props": [
      "error",
      "as-needed"
    ],
    "semi": "error",
    "no-extra-semi": "error",
    "semi-spacing": "error",
    "no-spaced-func": "error",
    "no-throw-literal": "error",
    "space-before-blocks": "error",
    "space-before-function-paren": [
      "error",
      "never"
    ],
    "space-infix-ops": "error",
    "space-unary-ops": "error",
    "no-var": "warn",
    "prefer-const": "warn",
    "strict": [
      "error",
      "global"
    ],
    "no-restricted-globals": [
      "error",
      {
        "name": "context",
        "message": "Don't use Mocha's global context"
      }
    ],
    "no-prototype-builtins": "off"
  }
}