.eslintrc.json

{
  "env": {
    "browser": true,
    "es2022": true
  },
  "extends": [
    "eslint:recommended",
    "plugin:react/recommended",
    "plugin:@typescript-eslint/recommended",
    "next/core-web-vitals"
  ],
  "overrides": [],
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "ecmaVersion": "latest",
    "sourceType": "module"
  },
  "plugins": [
    "react",
    "@typescript-eslint",
    "unused-imports"
  ],
  "rules": {
    "indent": [
      "error",
      2,
      {
        "SwitchCase": 1
      }
    ],
    "linebreak-style": [
      "error",
      "unix"
    ],
    "quotes": [
      "error",
      "single"
    ],
    "semi": [
      "error",
      "always"
    ],
    "comma-dangle": [
      "error",
      "always-multiline"
    ],
    "object-curly-spacing": [
      "error",
      "always"
    ],
    "sort-imports": [
      "error",
      {
        "ignoreDeclarationSort": true
      }
    ],
    "@typescript-eslint/ban-ts-comment": [
      "error",
      {
        "ts-ignore": "allow-with-description"
      }
    ],
    "import/order": [
      "error",
      {
        "groups": [
          "builtin", // 組み込みモジュール
          "external", // npmでインストールした外部ライブラリ
          "internal", // 自作モジュール
          [
            "parent",
            "sibling"
          ],
          "object",
          "type",
          "index"
        ],
        "newlines-between": "always", // グループ毎にで改行を入れる
        "pathGroupsExcludedImportTypes": [
          "builtin"
        ],
        "alphabetize": {
          "order": "asc", // 昇順にソート
          "caseInsensitive": true // 小文字大文字を区別する 
        }
      }
    ],
    "unused-imports/no-unused-imports": "error"
  }
}