{"id":73434,"date":"2023-10-20T08:00:14","date_gmt":"2023-10-19T23:00:14","guid":{"rendered":"https:\/\/apricot-design.com\/?post_type=staffblog&p=73434"},"modified":"2025-08-19T11:16:51","modified_gmt":"2025-08-19T02:16:51","slug":"javascript-arrow-functions","status":"publish","type":"staffblog","link":"https:\/\/apricot-design.com\/staffblog\/staffblog\/javascript-arrow-functions\/","title":{"rendered":"\u3010JavaScript\u3011\u30a2\u30ed\u30fc\u95a2\u6570\u5f0f\u306b\u3064\u3044\u3066"},"content":{"rendered":"

\u4eca\u56de\u306f\u4fbf\u5229\u306a\u306e\u306b\u3064\u3044\u4f7f\u7528\u3059\u308b\u3053\u3068\u3092\u5fd8\u308c\u3066\u3057\u307e\u3046
\nJavaScript\u306e\u300c\u30a2\u30ed\u30fc\u95a2\u6570\u5f0f\u300d\u3092\u5099\u5fd8\u9332\u7684\u306a\u5f62\u3067\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n

\u30a2\u30ed\u30fc\u95a2\u6570\u5f0f<\/span><\/h3>\n

\u30a2\u30ed\u30fc\u95a2\u6570\u5f0f\u306fES6\u304b\u3089\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u69cb\u6587\u3067\u3059\u3002
\n\u5f93\u6765\u306e\u95a2\u6570\u5f0f\u3092\u7c21\u7565\u5316\u3057\u3066\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u30a2\u30ed\u30fc\u95a2\u6570\u5f0f<\/div>\n
https:\/\/developer.mozilla.org\/ja\/docs\/Web\/JavaScript\/Reference\/Functions\/Arrow_functions#Description<\/a><\/div>\n

\u4f7f\u7528\u65b9\u6cd5<\/h4>\n
\u5f93\u6765\u306e\u7121\u540d\u95a2\u6570<\/div>\n
(function (a) {
\n\u3000\u3000return a + 10;
\n});<\/code><\/div>\n
\u30a2\u30ed\u30fc\u95a2\u6570\u5f0f<\/div>\n
a => a + 10;<\/code><\/div>\n

\u3068\u3066\u3082\u7c21\u7565\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u306d\u3002<\/p>\n

\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u7279\u5fb4<\/h4>\n
\u30fb\u5f15\u6570\u304c\u4e00\u3064\u306e\u5834\u5408\u306f()\u3092\u7701\u7565\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/div>\n
\u4f8b<\/div>\n
\u5f93\u6765\u306e\u7121\u540d\u95a2\u6570<\/div>\n
(function (a) {
\n\u3000\u3000return a + 10;
\n});<\/code><\/div>\n
\u30a2\u30ed\u30fc\u95a2\u6570\u5f0f<\/div>\n
a => a + 10;<\/code><\/div>\n

\u305f\u3060\u3057\u5f15\u6570\u304c\u8907\u6570\u306e\u5834\u5408\u306f()\u304c\u5fc5\u9808\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u00d7\u3053\u308c\u306f\u9593\u9055\u3044<\/div>\n
a, b => a + b + 10;<\/code><\/div>\n
\u3007\u5f15\u6570\u304c\u8907\u6570\u306e\u5834\u5408\u306f()\u304c\u5fc5\u8981<\/div>\n
(a, b) => a + b + 10;<\/code><\/div>\n

\u3061\u306a\u307f\u306b\u4e0a\u8a18\u95a2\u6570\u306e\u5f93\u6765\u306e\u8a18\u8ff0\u306f\u3053\u3046\u3067\u3059\u3002<\/p>\n

\u5f93\u6765\u306e\u7121\u540d\u95a2\u6570<\/div>\n
(function (a, b) {
\n\u3000\u3000return a + b + 10;
\n});<\/code><\/div>\n

\u30a2\u30ed\u30fc\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u30e1\u30ea\u30c3\u30c8<\/h4>\n
\u2460\u95a2\u6570\u3092\u77ed\u304f\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b
\n\u2461\u95a2\u6570\u5b9a\u7fa9\u6642\u306bthis\u304c\u6c7a\u307e\u308b<\/div>\n

\u2460\u306b\u3064\u3044\u3066\u306f\u524d\u8ff0\u306e\u8aac\u660e\u3067\u7406\u89e3\u3067\u304d\u305f\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

\u2461\u306b\u3064\u3044\u3066\u306f\u7406\u89e3\u304c\u96e3\u3057\u3044\u3068\u3053\u308d\u306a\u306e\u3067\u3001\u79c1\u81ea\u8eab\u3082\u52c9\u5f37\u3057\u306a\u304a\u3057\u3064\u3064\u8aac\u660e\u3092\u66f8\u3044\u3066\u3044\u3053\u3046\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

\u305d\u3082\u305d\u3082\u3001JavaScript\u306ethis\u3068\u306f\u4f55\u306a\u306e\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n

\u3068\u3066\u3082\u7c21\u5358\u306b\u8aac\u660e\u3059\u308b\u3068\u3001this\u306f\u300e\u547c\u3073\u51fa\u3057\u305f\u5834\u6240\u3084\u65b9\u6cd5\u306b\u3088\u3063\u3066\u4e2d\u8eab\u304c\u5909\u308f\u308b\u5909\u6570\u300f<\/span>\u3067\u3059\u3002
\n\u306a\u306e\u3067\u3001this\u304c\u4f55\u306a\u306e\u304b\u306f\u305d\u306e\u90fd\u5ea6\u5909\u308f\u308a\u307e\u3059\u3002
\n\uff08\u4eca\u56de\u306f\u30a2\u30ed\u30fc\u95a2\u6570\u3068\u305d\u308c\u4ee5\u5916\u306e\u95a2\u6570\uff08\u30e1\u30bd\u30c3\u30c9\u542b\u3080\u203b\uff09\u3067\u306ethis\u306e\u8a71\u3092\u3057\u307e\u3059\uff09<\/p>\n

\u203b\u30e1\u30bd\u30c3\u30c9\u306f\u95a2\u6570\u3092\u5024\u306b\u6301\u3064\u30d7\u30ed\u30d1\u30c6\u30a3<\/p>\n

\u30a2\u30ed\u30fc\u95a2\u6570\u306ethis<\/div>\n

\u21d2\u95a2\u6570\u5b9a\u7fa9\u6642\u306b\u6c7a\u3081\u308b\u4e8b\u304c\u3067\u304d\u308b<\/p>\n

\u305d\u308c\u4ee5\u5916\u306e\u95a2\u6570\uff08\u30e1\u30bd\u30c3\u30c9\u542b\u3080\uff09\u306ethis<\/div>\n

\u21d2\u95a2\u6570\u3092\u5b9f\u884c\u3059\u308b\u3068\u304d\u306b\u6c7a\u307e\u308b<\/p>\n

\u30a2\u30ed\u30fc\u95a2\u6570\u4ee5\u5916\u306ethis\u306e\u300c\u95a2\u6570\u3092\u5b9f\u884c\u3059\u308b\u3068\u304d\u306b\u6c7a\u307e\u308b\u300d\u306f\u82e5\u5e72\u554f\u984c\u304c\u3042\u308a\u3001
\n\u5b9f\u884c\u3057\u305f\u6642\u306bthis\u304c\u6c7a\u307e\u308b\u306e\u3067\u4e88\u671f\u305b\u306c\u6319\u52d5\u3092\u8fd4\u3059\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002
\n\uff08\u305f\u3060\u3057\u3053\u308c\u304c\u5fc5\u8981\u306a\u5834\u5408\u3082\u3042\u308a\u307e\u3059\uff09<\/p>\n

\u30a2\u30ed\u30fc\u95a2\u6570\u306f\u300c\u95a2\u6570\u5b9a\u7fa9\u6642\u306b\u6c7a\u3081\u308b\u4e8b\u304c\u3067\u304d\u308b\u300d\u306e\u3067\u3001\u5b9f\u884c\u3059\u308b\u307e\u3067this\u304c\u4f55\u304b\u308f\u304b\u3089\u306a\u3044\u554f\u984c\u3092\u56de\u907f\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u30a2\u30ed\u30fc\u95a2\u6570\u304c\u3069\u306ethis\u3092\u53c2\u7167\u3059\u308b\u304b\u306f<\/p>\n

\u30fb\u5916\u5074\u306e\u95a2\u6570\u30b9\u30b3\u30fc\u30d7\u304b\u3089\u898b\u305f\u300cthis\u300d\u3092\u53c2\u7167
\n\u30fb\u95a2\u6570\u30b9\u30b3\u30fc\u30d7\u306e\u4e2d\u306b\u3044\u306a\u3051\u308c\u3070\u3001window\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6307\u3059<\/div>\n

\u3053\u308c\u306a\u3089\u95a2\u6570\u5b9f\u884c\u6642\u306b\u6c7a\u307e\u308b\u3088\u308a\u3082\u3001this\u306e\u4e2d\u8eab\u304c\u60f3\u50cf\u3057\u3084\u3059\u3044\u3067\u3059\u306d\u25ce<\/p>\n

\u53c2\u8003<\/div>\n

\u30a2\u30ed\u30fc\u95a2\u6570\u304c\u4fbf\u5229\u306a\u7406\u7531\u3068\u4f7f\u3044\u3069\u3053\u308d<\/p>\n

https:\/\/qiita.com\/10mi8o\/items\/2da84ab650f4caffdeea<\/a><\/div>\n

\u95a2\u6570\u3068\u30b9\u30b3\u30fc\u30d7<\/p>\n

https:\/\/jsprimer.net\/basic\/function-scope\/<\/a><\/div>\n

JavaScript\u3001\u30a2\u30ed\u30fc\u95a2\u6570\u306ethis\u306b\u3064\u3044\u3066\u3002<\/p>\n

https:\/\/fuuno.net\/nani\/nani20\/nani20.html<\/a><\/div>\n","protected":false},"featured_media":78040,"parent":0,"menu_order":0,"template":"","blog_cat":[25],"blog_tag":[],"blog_recommendation_ct":[],"writing-ct":[16],"class_list":["post-73434","staffblog","type-staffblog","status-publish","has-post-thumbnail","hentry","blog_cat-web","writing-ct-sasayama-sayaka"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/apricot-design.com\/staffblog\/wp-json\/wp\/v2\/staffblog\/73434","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/apricot-design.com\/staffblog\/wp-json\/wp\/v2\/staffblog"}],"about":[{"href":"https:\/\/apricot-design.com\/staffblog\/wp-json\/wp\/v2\/types\/staffblog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/apricot-design.com\/staffblog\/wp-json\/wp\/v2\/media\/78040"}],"wp:attachment":[{"href":"https:\/\/apricot-design.com\/staffblog\/wp-json\/wp\/v2\/media?parent=73434"}],"wp:term":[{"taxonomy":"blog_cat","embeddable":true,"href":"https:\/\/apricot-design.com\/staffblog\/wp-json\/wp\/v2\/blog_cat?post=73434"},{"taxonomy":"blog_tag","embeddable":true,"href":"https:\/\/apricot-design.com\/staffblog\/wp-json\/wp\/v2\/blog_tag?post=73434"},{"taxonomy":"blog_recommendation_ct","embeddable":true,"href":"https:\/\/apricot-design.com\/staffblog\/wp-json\/wp\/v2\/blog_recommendation_ct?post=73434"},{"taxonomy":"writing-ct","embeddable":true,"href":"https:\/\/apricot-design.com\/staffblog\/wp-json\/wp\/v2\/writing-ct?post=73434"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}