.eslintrc.json

{
  "env": {
    "es2021": true,
    "mocha": true,
    "node": true
  },
  "extends": "eslint:recommended",
  "rules": {
    "array-bracket-spacing": "error",
    "comma-dangle": ["error", "never"],
    "comma-style": ["error", "last"],
    "consistent-this": ["error", "self"],
    "curly": ["error", "all"],
    "eol-last": ["error", "always"],
    "guard-for-in": "error",
    "indent": ["error", 4, { "SwitchCase": 1 }],
    "keyword-spacing": ["error", { "before": true, "after": true }],
    "linebreak-style": ["error", "unix"],
    "max-params": ["error", 5],
    "new-cap": ["error", { "newIsCap": true, "capIsNew": true, "properties": true }],
    "no-eval": "error",
    "no-multiple-empty-lines": ["error", { "max": 2, "maxEOF": 1 }],
    "no-trailing-spaces": "error",
    "no-var": "error",
    "one-var": ["error", { "uninitialized": "always", "initialized": "never" }],
    "padding-line-between-statements": [
      "error",
      { "blankLine": "always", "prev": ["const", "let", "var"], "next": "*" },
      { "blankLine": "any", "prev": ["const", "let", "var"], "next": ["const", "let", "var"]}
    ],
    "prefer-const": "error",
    "quotes": ["error", "single"],
    "semi": ["error", "always"],
    "space-before-blocks": ["error", "always"],
    "space-before-function-paren": ["error", { "named": "never" }],
    "space-in-parens": ["error", "never"],
    "space-infix-ops": "error",
    "space-unary-ops": ["error", { "words": false, "nonwords": false }],
    "strict": ["error", "global"],
    "wrap-iife": ["error", "inside"]
  }
}