.eslintrc

{
  "env": {
    "browser": true,
    "commonjs": true,
    "es2021": true,
    "jest": true,
    "node": true
  },
  "extends": [
    "eslint:recommended"
  ],
  "plugins": [
    "prefer-arrow"
  ],
  "parserOptions": {
    "ecmaVersion": 12
  },
  "rules": {
    "no-console": "error",
    "no-inline-comments": "error",
    "quotes": [
      "error",
      "double"
    ],
    "indent": [
      "error",
      2
    ],
    "arrow-parens": "error",
    "arrow-spacing": "error",
    "arrow-body-style": "error",
    "no-confusing-arrow": "error",
    "prefer-arrow-callback": "warn",
    "key-spacing": ["error", { "mode": "strict", "beforeColon": false, "afterColon": true }],
    "keyword-spacing": [
      "error",
      {
        "after": true,
        "before": true
      }
    ],
    "no-duplicate-imports": "error",
    "rest-spread-spacing": "error",
    "no-useless-rename": "error",
    "no-irregular-whitespace": "error",
    "comma-style": [
      "error",
      "last"
    ],
    "no-var": "error",
    "prefer-const": "error",
    "comma-dangle": [
      "error",
      "only-multiline"
    ],
    "quote-props": [
      "error",
      "as-needed"
    ],
    "no-multi-spaces": "error",
    "semi": [
      "error",
      "always"
    ],
    "prefer-arrow/prefer-arrow-functions": [
      "error",
      {
        "disallowPrototype": true,
        "singleReturnOnly": false,
        "classPropertiesAllowed": false
      }
    ],
    "no-multiple-empty-lines": [
      "error",
      {
        "max": 1
      }
    ],
    "space-before-blocks": "error",
    "space-infix-ops": "error",
    "spaced-comment": "error",
    "func-style": [
      "error",
      "expression"
    ],
    "no-trailing-spaces": [
      2,
      {
        "skipBlankLines": true
      }
    ],
    "eol-last": [
      "error",
      "always"
    ],
    "object-curly-spacing": [
      "error",
      "always"
    ],
    "curly": [
      "error",
      "multi-line"
    ],
    "lines-between-class-members": [
      "error",
      "always"
    ],
    "linebreak-style": [
      "error",
      "unix"
    ],
    "no-underscore-dangle": 0,
    "nonblock-statement-body-position": [
      "error",
      "beside"
    ],
    "comma-spacing": [
      "error",
      {
        "before": false,
        "after": true
      }
    ]
  }
}