.eslintrc

{
  "root": true,
  "parserOptions": {
    "ecmaVersion": 2020,
    "sourceType": "script",
    "ecmaFeatures": {
      "impliedStrict": true
    }
  },
  "env": {
    "browser": true,
    "node": false,
    "es6": true
  },
  "extends": [
    "eslint:recommended"
  ],
  "plugins": [],
  "rules": {
    "no-tabs": "warn",
    "indent": ["warn", 2, { "SwitchCase": 1 }],
    "eol-last": "off",
    "no-undef": "warn",
    "semi": ["error", "always"],
    "no-console": "off",
    "no-useless-escape": "off",
    "no-empty": "off",
    "camelcase": ["warn", { "properties": "never" }],
    "no-var": ["error"],
    "prefer-const": ["error"],
    "block-spacing": ["warn", "always"],
    "comma-spacing": ["warn", { "before": false, "after": true }],
    "comma-style": ["warn", "last"],
    "comma-dangle": ["warn", "never"],
    "curly": ["warn"],
    "brace-style": ["warn", "1tbs", { "allowSingleLine": true }],
    "no-mixed-operators": ["warn", { "allowSamePrecedence": true }],
    "operator-linebreak": ["warn", "after"],
    "object-curly-newline": ["warn", { "consistent": true }],
    "object-curly-spacing": ["warn", "always"],
    "array-bracket-newline": ["warn", "consistent"],
    "array-element-newline": ["warn", "consistent"],
    "semi-spacing": "warn",
    "space-before-blocks": ["warn", "always"],
    "space-infix-ops": ["warn", { "int32Hint": false }],
    "space-unary-ops": "warn",
    "no-mixed-spaces-and-tabs": "warn",
    "no-whitespace-before-property": "warn",
    "switch-colon-spacing": "error",
    "key-spacing": ["warn"],
    "keyword-spacing": ["warn", { "before": true }],
    "space-before-function-paren": [
      "warn",
      { "anonymous": "always", "named": "never", "asyncArrow": "always" }
    ],
    "no-unused-vars": ["error", { "vars": "all", "args": "none" }],
    "no-unsafe-optional-chaining": "error",
    "quotes": ["warn", "single", { "avoidEscape": true }],
    "no-param-reassign": "error",

    "no-prototype-builtins": "off"
  },

  "globals": {
    "chrome": "readonly"
  }
}