{"id":115359,"date":"2021-12-20T06:00:01","date_gmt":"2021-12-19T21:00:01","guid":{"rendered":"https:\/\/anthem00.xsrv.jp\/2023_new_tcd\/?p=115359"},"modified":"2022-05-26T22:13:59","modified_gmt":"2022-05-26T13:13:59","slug":"javascript-eslint","status":"publish","type":"post","link":"https:\/\/anthem00.xsrv.jp\/2023_new_tcd\/2021\/12\/javascript-eslint.html","title":{"rendered":"\u3010JavaScript\u306e\u5fdc\u7528\u3011\u69cb\u6587\u30c1\u30a7\u30c3\u30af\u30c4\u30fc\u30eb -ESLint"},"content":{"rendered":"

\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u884c\u3046\u969b\u306b\u3001\u65e5\u9803\u304b\u3089\u4e00\u8cab\u6027\u306e\u3042\u308b\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u308b\u3088\u3046\u306b\u610f\u8b58\u3059\u308b\u3053\u3068\u306f\u5927\u5207\u3067\u3059\u3002
\n\u3057\u304b\u3057\u3001\u3059\u3079\u3066\u624b\u4f5c\u696d\u3067\u30b3\u30fc\u30c9\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u306e\u306f\u624b\u9593\u304c\u304b\u304b\u308b\u305f\u3081\u3001\u3042\u308b\u7a0b\u5ea6\u898f\u6a21\u306e\u5927\u304d\u3044\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3067\u3042\u308c\u3070\u69cb\u6587\u30c1\u30a7\u30c3\u30af\u30c4\u30fc\u30eb\u306a\u3069\u3092\u5c0e\u5165\u3059\u308b\u3068\u52b9\u7387\u7684\u3067\u3059\u3002<\/p>\n

\u305d\u3053\u3067\u4eca\u56de\u306f\u3001ESLint\u3068\u3044\u3046JavaScript\u306e\u69cb\u6587\u30c1\u30a7\u30c3\u30af\u30c4\u30fc\u30eb\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

ESLint<\/strong><\/h2>\n

ESLint\u3068\u306f\u3001JavaScript\u3067\u66f8\u304b\u308c\u305f\u30b3\u30fc\u30c9\u306e\u69cb\u6587\u3092\u691c\u8a3c\u3059\u308b\u305f\u3081\u306e\u30c4\u30fc\u30eb\u3067\u3059\u3002
\nESLint\u3092\u4f7f\u3046\u3068\u3001\u4e00\u5b9a\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u306b\u6cbf\u3063\u3066\u30b3\u30fc\u30c9\u304c\u66f8\u304b\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u81ea\u52d5\u3067\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u898f\u7d04\u306b\u6cbf\u3063\u3066\u3044\u306a\u3044\u5834\u5408\u306b\u306f\u30a8\u30e9\u30fc\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002
\n\u30b3\u30fc\u30c9\u306e\u4e00\u8cab\u6027\u3092\u9ad8\u3081\u306a\u304c\u3089\u3001\u30d0\u30b0\u3092\u56de\u907f\u3067\u304d\u308b\u3053\u3068\u304cESLint\u306e\u30e1\u30ea\u30c3\u30c8\u3067\u3059\u3002<\/p>\n

\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u306f\u81ea\u5206\u3067\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u304c\u3001Airbnb\u3084Google\u306a\u3069\u304c\u516c\u958b\u3057\u3066\u3044\u308b\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n

>>ESLint<\/a><\/p>\n

ESLint\u3092\u5c0e\u5165\u3059\u308b<\/strong><\/h2>\n

\u3067\u306f\u3001\u65e9\u901fESLint\u3092\u5c0e\u5165\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n

ESLint\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/strong><\/h3>\n

\u307e\u305a\u306f\u3001\u4efb\u610f\u306e\u540d\u524d\u3067\u30d5\u30a9\u30eb\u30c0\u3092\u4f5c\u6210\u3057\u3001\u305d\u306e\u4e2d\u306beslint\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u307e\u3059\u3002<\/p>\n

\n
$ mkdir eslint-test\r\n$ cd eslint-test\r\n$ yarn add eslint --dev\r\n\r\n[1\/4] 🔍 Resolving packages...\r\n[2\/4] 🚚 Fetching packages...\r\n[3\/4] 🔗 Linking dependencies...\r\n[4\/4] 🔨 Building fresh packages...\r\n...\r\n✨ Done in 2.17s.<\/code><\/pre>\n<\/div>\n
\u6b21\u306b\u3001\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3067ESLint\u306e\u8a2d\u5b9a\u7528\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n
\n
$ yarn run eslint --init<\/code><\/pre>\n<\/div>\n
\u3059\u308b\u3068\u3001\u69d8\u3005\u306a\u8cea\u554f\u3092\u805e\u304b\u308c\u307e\u3059\u3002
\n\u57fa\u672c\u7684\u306b\u306f\u76ee\u7684\u3084\u597d\u307f\u306b\u3088\u3063\u3066\u9078\u629e\u3059\u308c\u3070\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002
\n\u4eca\u56de\u306f\u3001JavaScript\u3067Airbnb\u306e\u898f\u7d04\u3092\u9069\u7528\u3059\u308b\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u7b54\u3048\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n
\n
? How would you like to use ESLint?<\/code><\/pre>\n<\/div>\n
\u300cTo check syntax, find problems, and enforce code style\u300d\u3092\u9078\u629e<\/p>\n
\n
? What type of modules does your project use?<\/code><\/pre>\n<\/div>\n
\u300cNone of these\u300d\u3092\u9078\u629e<\/p>\n
\n
? Which framework does your project use?<\/code><\/pre>\n<\/div>\n
\u300cNone of these\u300d\u3092\u9078\u629e<\/p>\n
\n
? Does your project use TypeScript?<\/code><\/pre>\n<\/div>\n
\u300cNo\u300d\u3092\u9078\u629e<\/p>\n
\n
? Where does your code run?<\/code><\/pre>\n<\/div>\n
\u300cBrowser\u300d\u3092\u9078\u629e<\/p>\n
\n
? How would you like to define a style for your project?<\/code><\/pre>\n<\/div>\n
\u300cUse a popular style guide\u300d\u3092\u9078\u629e<\/p>\n
\n
? Which style guide do you want to follow?<\/code><\/pre>\n<\/div>\n
\u300cAirbnb\u300d\u3092\u9078\u629e<\/p>\n
\n
? What format do you want your config file to be in?<\/code><\/pre>\n<\/div>\n
\u300cJavaScript\u300d\u3092\u9078\u629e<\/p>\n
\n
? Would you like to install them now with npm?<\/code><\/pre>\n<\/div>\n
\u300cYes\u300d\u3092\u9078\u629e<\/p>\n
\u5b8c\u4e86\u3059\u308b\u3068\u3001.eslintrc.js\u3068\u3044\u3046\u30d5\u30a1\u30a4\u30eb\u304c\u4f5c\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n
\n
✔ How would you like to use ESLint? \u00b7 style\r\n✔ What type of modules does your project use? \u00b7 none\r\n✔ Which framework does your project use? \u00b7 none\r\n✔ Does your project use TypeScript? \u00b7 No \/ Yes\r\n✔ Where does your code run? \u00b7 browser\r\n✔ How would you like to define a style for your project? \u00b7 guide\r\n✔ Which style guide do you want to follow? \u00b7 airbnb\r\n✔ What format do you want your config file to be in? \u00b7 JavaScript\r\nChecking peerDependencies of eslint-config-airbnb-base@latest\r\n...\r\nSuccessfully created .eslintrc.js file in ...\/eslint-test\r\n✨ Done in 347.62s.<\/code><\/pre>\n<\/div>\n
.eslintrc\u30d5\u30a1\u30a4\u30eb\u306e\u4e2d\u306b\u306f\u3001ESLint\u306e\u898f\u7d04\u8a2d\u5b9a\u304c\u66f8\u304b\u308c\u3066\u3044\u307e\u3059\u3002
\n\u72ec\u81ea\u306e\u3082\u306e\u3092\u8a2d\u5b9a\u3057\u305f\u308a\u3001\u65e2\u5b58\u306e\u3082\u306e\u3092\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n
\n
module.exports = {\r\n  env: {\r\n    browser: true,\r\n    es2021: true,\r\n  },\r\n  extends: [\r\n    'airbnb-base',\r\n  ],\r\n  parserOptions: {\r\n    ecmaVersion: 13,\r\n  },\r\n  rules: {\r\n  },\r\n};\r\n<\/code><\/pre>\n<\/div>\n
\u3053\u308c\u3067Airbnb\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u304c\u53cd\u6620\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
ESLint\u3067\u69cb\u6587\u30c1\u30a7\u30c3\u30af<\/strong><\/h3>\n
\u3055\u3044\u3054\u306b\u3001ESLint\u3092\u4f7f\u3063\u3066\u69cb\u6587\u30c1\u30a7\u30c3\u30af\u3092\u884c\u306a\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
VSCode\u306e\u3088\u3046\u306a\u30a8\u30c7\u30a3\u30bf\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u81ea\u52d5\u7684\u306b.eslintrc\u5185\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u898f\u7d04\u304c\u9069\u7528\u3055\u308c\u308b\u305f\u3081\u3001\u9593\u9055\u3044\u304c\u3042\u308c\u3070\u4fee\u6b63\u7b87\u6240\u304c\u8868\u793a\u3055\u308c\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n
\u307e\u305a\u306f\u3001package.json\u30d5\u30a1\u30a4\u30eb\u306escripts\u306b\u4ee5\u4e0b\u3092\u8ffd\u8a18\u3057\u3066\u3001eslint\u306e\u30b3\u30de\u30f3\u30c9\u3092\u8a2d\u5b9a\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\n
{\r\n  ...\r\n  \"scripts\": {\r\n    \"eslint\": \"eslint .\"\r\n  }\r\n}<\/code><\/pre>\n<\/div>\n
\u3053\u308c\u3067eslint\u30b3\u30de\u30f3\u30c9\u3092\u5165\u529b\u3059\u308b\u3068\u3001ESLint\u304c\u5b9f\u884c\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
\u6b21\u306b\u3001index.js\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u66f8\u304d\u307e\u3059\u3002<\/p>\n
\n
const test = \"test\"<\/code><\/pre>\n<\/div>\n
\u3067\u306f\u3001ESLint\u3092\u8d70\u3089\u305b\u3066\u307f\u307e\u3059\u3002<\/p>\n
\n
$ yarn run eslint<\/code><\/pre>\n<\/div>\n
\u3059\u308b\u3068\u30014\u4ef6\u306e\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n
\n
$ eslint .\r\n\r\neslint-test\/index.js\r\n  1:7 error 'test' is assigned a value but never used       no-unused-vars\r\n  1:14 error Strings must use singlequote                   quotes\r\n  1:20 error Newline required at end of file but not found  eol-last\r\n  1:20 error Missing semicolon                              semi<\/code><\/pre>\n<\/div>\n
\u30a8\u30e9\u30fc\u5185\u5bb9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n