.eslintrc

{
  "env": {
    "browser": true,
    "es2021": true
  },
  "extends": [
    "eslint:recommended",
    "plugin:react/recommended",
    "plugin:@typescript-eslint/recommended"
  ],
  "overrides": [
  ],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaVersion": "latest",
    "sourceType": "module"
  },
  "plugins": [
    "react",
    "@typescript-eslint"
  ],
  "rules": {
    // Possible Errors
    "for-direction": "error",
    "getter-return": [
      "warn"
    ],
    "no-await-in-loop": "warn",
    "no-compare-neg-zero": "error",
    "no-cond-assign": [
      "warn",
      "always"
    ],
    "no-console": [
      "warn"
    ],
    "no-constant-condition": "error",
    "no-control-regex": "error",
    "no-debugger": "error",
    "no-dupe-args": "error",
    "no-dupe-keys": "error",
    "no-duplicate-case": "error",
    "no-empty": [
      "error"
    ],
    "no-empty-character-class": "error",
    "no-ex-assign": "error",
    "no-extra-boolean-cast": "error",
    "no-extra-parens": [
      "off"
    ],
    "no-extra-semi": "error",
    "no-func-assign": "error",
    "no-inner-declarations": [
      "error",
      "both"
    ],
    "no-invalid-regexp": [
      "error"
    ],
    "no-irregular-whitespace": [
      "error"
    ],
    // 文字列もチェックしたほうが安全かなあ
    "no-obj-calls": "error",
    "no-regex-spaces": "warn",
    "no-sparse-arrays": "error",
    "no-template-curly-in-string": "error",
    "no-unexpected-multiline": "error",
    "no-unreachable": "error",
    "no-unsafe-finally": "error",
    "no-unsafe-negation": "error",
    "use-isnan": "error",
    "valid-jsdoc": [
      "warn"
    ],
    "valid-typeof": [
      "error"
    ],
    // Best Practices
    "accessor-pairs": [
      "warn"
    ],
    "array-callback-return": [
      "warn",
      {
        "allowImplicit": true
      }
    ],
    "block-scoped-var": "warn",
    "class-methods-use-this": [
      "warn"
    ],
    "complexity": [
      "warn",
      {
        "max": 20
      }
    ],
    "consistent-return": [
      "error"
    ],
    "curly": [
      "error"
    ],
    "default-case": [
      "error"
    ],
    "dot-location": [
      "error",
      "property"
    ],
    "dot-notation": [
      "error"
    ],
    "eqeqeq": [
      "error",
      "smart"
    ],
    "guard-for-in": "off",
    "no-alert": "warn",
    "no-caller": "error",
    "no-case-declarations": "warn",
    "no-div-regex": "error",
    "no-else-return": [
      "error",
      {
        "allowElseIf": false
      }
    ],
    "no-empty-function": [
      "warn"
    ],
    "no-empty-pattern": "error",
    "no-eval": [
      "error"
    ],
    "no-extend-native": [
      "error"
    ],
    "no-extra-bind": "error",
    "no-extra-label": "error",
    "no-fallthrough": [
      "error",
      {
        "commentPattern": "break[\\s\\w]*omitted | no\\s?break"
      }
    ],
    "no-floating-decimal": "error",
    "no-global-assign": [
      "error"
    ],
    "no-implicit-coercion": [
      "off"
    ],
    "no-implicit-globals": [
      "off"
    ],
    "no-implied-eval": [
      "error"
    ],
    "no-invalid-this": "error",
    "no-iterator": "error",
    "no-labels": "error",
    "no-lone-blocks": "error",
    "no-loop-func": "error",
    "no-multi-spaces": [
      "warn",
      {
        "exceptions": {
          "Property": true,
          "VariableDeclarator": true,
          "ImportDeclaration": true
        }
      }
    ],
    "no-multi-str": "error",
    "no-new": "error",
    "no-new-func": "error",
    "no-new-wrappers": "error",
    "no-octal": "error",
    "no-octal-escape": "error",
    "no-param-reassign": [
      "warn"
    ],
    "no-proto": "error",
    "no-redeclare": [
      "error"
    ],
    "no-restricted-properties": "off",
    "no-return-assign": "error",
    "no-return-await": "warn",
    "no-script-url": "error",
    "no-self-assign": [
      "error"
    ],
    "no-self-compare": "error",
    "no-sequences": [
      "warn"
    ],
    "no-throw-literal": "error",
    "no-unmodified-loop-condition": "error",
    "no-unused-expressions": [
      "error"
    ],
    "no-unused-labels": "error",
    "no-useless-call": "error",
    "no-useless-concat": "error",
    "no-useless-escape": "error",
    "no-useless-return": "error",
    "no-void": "error",
    "no-warning-comments": "warn",
    "no-with": "error",
    "prefer-promise-reject-errors": [
      "error",
      {
        "allowEmptyReject": true
      }
    ],
    "radix": "error",
    "require-await": "warn",
    "vars-on-top": "warn",
    "wrap-iife": [
      "warn",
      "inside"
    ],
    "yoda": [
      "error",
      "never",
      {
        "exceptRange": true
      }
    ],
    "react/no-children-prop": "warn",
    "prefer-const": "warn",

    "no-prototype-builtins": "off",
    "react/no-unescaped-entities": "off"
  }
}