.eslintrc.json

{
  "env": {
    "es6": true,
    "node": true
  },
  "extends": "eslint:recommended",
  "parserOptions": {
    "sourceType": "module",
    "ecmaVersion": 2021,
    "impliedStrict": true
  },
  "rules": {
    "indent": [
      "error",
      2,
      {
        "SwitchCase": 1,
        "MemberExpression": 1,
        "VariableDeclarator": { "var": 2, "let": 2, "const": 3 }
      }
    ],
    "linebreak-style": ["error", "unix"],
    "quotes": ["error", "single"],
    "semi": ["error", "always"],
    "eqeqeq": ["error", "always"],
    "no-loop-func": "error",
    "strict": ["error", "global"],
    "block-spacing": ["error", "always"],
    "brace-style": ["error", "1tbs", { "allowSingleLine": true }],
    "camelcase": "error",
    "comma-style": ["error", "last"],
    "comma-spacing": ["error", { "before": false, "after": true }],
    "eol-last": "error",
    "func-call-spacing": ["error", "never"],
    "key-spacing": [
      "error",
      { "beforeColon": false, "afterColon": true, "mode": "strict" }
    ],
    "keyword-spacing": [
      "error",
      {
        "before": true,
        "after": true,
        "overrides": { "function": { "after": false } }
      }
    ],
    "max-len": [
      "error",
      {
        "code": 80,
        "ignoreUrls": true,
        "ignoreTemplateLiterals": true,
        "ignoreRegExpLiterals": true
      }
    ],
    "max-nested-callbacks": ["error", { "max": 5 }],
    "new-cap": [
      "error",
      { "newIsCap": true, "capIsNew": true, "properties": true }
    ],
    "new-parens": "error",
    "no-lonely-if": "error",
    "no-trailing-spaces": "error",
    "no-unneeded-ternary": "error",
    "no-whitespace-before-property": "error",
    "object-curly-spacing": ["error", "always"],
    "operator-assignment": ["error", "always"],
    "operator-linebreak": ["error", "after"],
    "semi-spacing": ["error", { "before": false, "after": true }],
    "space-before-blocks": ["error", "always"],
    "space-before-function-paren": ["error", "never"],
    "space-in-parens": ["error", "never"],
    "space-infix-ops": "error",
    "space-unary-ops": [
      "error",
      { "words": true, "nonwords": false, "overrides": { "typeof": false } }
    ],
    "no-unreachable": "error",
    "no-global-assign": "error",
    "no-self-compare": "error",
    "no-unmodified-loop-condition": "error",
    "no-constant-condition": ["error", { "checkLoops": false }],
    "no-console": "off",
    "no-useless-concat": "error",
    "no-useless-escape": "error",
    "no-shadow-restricted-names": "error",
    "no-use-before-define": "error",
    "arrow-body-style": ["error", "as-needed"],
    "arrow-spacing": "error",
    "arrow-parens": ["error", "as-needed", { "requireForBlockBody": true }],
    "no-confusing-arrow": ["error", { "allowParens": true }],
    "no-useless-computed-key": "error",
    "no-useless-rename": "error",
    "no-var": "error",
    "object-shorthand": ["error", "always"],
    "prefer-arrow-callback": "error",
    "prefer-const": "error",
    "prefer-numeric-literals": "error",
    "prefer-rest-params": "error",
    "prefer-spread": "error",
    "rest-spread-spacing": ["error", "never"],
    "template-curly-spacing": ["error", "never"],
    "handle-callback-err": "error"
  }
}