.eslintrc.json

{
  "env": {
    "node": true,
    "es2021": true,
    "jest/globals": true
  },
  "plugins": ["jest"],
  "extends": "eslint:recommended",
  "parserOptions": {
    "ecmaVersion": 12,
    "sourceType": "module"
  },
  "rules": {
    "accessor-pairs": "error",
    "no-unused-vars": "error",
    "default-case": "error",
    "eqeqeq": "error",
    "no-extend-native": "error",
    "curly": [
      2,
      "all"
    ],
    "operator-linebreak": [
      2,
      "after"
    ],
    "camelcase": [
      2,
      {
        "properties": "always"
      }
    ],
    "max-len": [
      2,
      80
    ],
    "indent": [
      2,
      2,
      {
        "SwitchCase": 1
      }
    ],
    "quotes": [
      2,
      "single"
    ],
    "no-multi-str": 2,
    "no-mixed-spaces-and-tabs": 2,
    "no-trailing-spaces": 2,
    "space-unary-ops": [
      2,
      {
        "nonwords": false,
        "overrides": {}
      }
    ],
    "one-var": [
      2,
      {
        "uninitialized": "always",
        "initialized": "never"
      }
    ],
    "brace-style": [
      2,
      "1tbs",
      {
        "allowSingleLine": true
      }
    ],
    "keyword-spacing": [
      2,
      {}
    ],
    "space-infix-ops": 2,
    "space-before-blocks": [
      2,
      "always"
    ],
    "eol-last": 2,
    "space-before-function-paren": [
      2,
      {
        "anonymous": "ignore",
        "named": "never"
      }
    ],
    "array-bracket-spacing": [
      2,
      "never",
      {
        "singleValue": true
      }
    ],
    "space-in-parens": [
      2,
      "never"
    ],
    "no-multiple-empty-lines": 2,
    "no-with": 2,
    "no-spaced-func": 2,
    "key-spacing": [
      2,
      {
        "beforeColon": false,
        "afterColon": true
      }
    ],
    "dot-notation": 2,
    "semi": [
      2,
      "always"
    ],
    "valid-jsdoc": 2
  }
}