{"id":6185,"date":"2021-04-30T15:09:38","date_gmt":"2021-04-30T06:09:38","guid":{"rendered":"http:\/\/www.otwo.jp\/blog\/?p=6185"},"modified":"2021-04-30T15:09:38","modified_gmt":"2021-04-30T06:09:38","slug":"js-shorthand","status":"publish","type":"post","link":"https:\/\/www.otwo.jp\/blog\/js-shorthand\/","title":{"rendered":"\u521d\u5fc3\u8005\u3067\u3082\u77e5\u3063\u3066\u304a\u304d\u305f\u3044JavaScript\u306e\u4fbf\u5229\u306a\u30b7\u30e7\u30fc\u30c8\u30cf\u30f3\u30c9"},"content":{"rendered":"<p><img decoding=\"async\" loading=\"lazy\" src=\"http:\/\/www.otwo.jp\/blog\/wp-content\/uploads\/2021\/04\/js_shorthandle.png\" alt=\"\" width=\"700\" height=\"399\" class=\"alignnone size-full wp-image-6228\" srcset=\"https:\/\/www.otwo.jp\/blog\/wp-content\/uploads\/2021\/04\/js_shorthandle.png 700w, https:\/\/www.otwo.jp\/blog\/wp-content\/uploads\/2021\/04\/js_shorthandle-150x86.png 150w, https:\/\/www.otwo.jp\/blog\/wp-content\/uploads\/2021\/04\/js_shorthandle-300x171.png 300w\" sizes=\"(max-width: 700px) 100vw, 700px\" \/><br \/>\n\u3053\u3093\u306b\u3061\u306f\u3001WEB\u306e\u4f50\u91ce\u3067\u3059\u3002<br \/>\n\u4eca\u56de\u306fJavaScript\u306e\u30b7\u30e7\u30fc\u30c8\u30cf\u30f3\u30c9\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u30b7\u30e7\u30fc\u30c8\u30cf\u30f3\u30c9\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u7c21\u7565\u5316\u3057\u305f\u66f8\u304d\u65b9\u306e\u3053\u3068\u3067\u3001\u5b66\u7fd2\u3092\u59cb\u3081\u305f\u3066\u306e\u4eba\u3060\u3068\u77e5\u3089\u306a\u3044\u4eba\u3082\u591a\u3044\u3093\u3058\u3083\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<p>\u7d30\u304b\u3044\u30b7\u30e7\u30fc\u30c8\u30cf\u30f3\u30c9\u306f\u591a\u304f\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u3046\u3044\u3063\u305f\u65b0\u3057\u3044\u767a\u898b\u3092\u3059\u308b\u3068<\/p>\n<div style=\"font-size: 90%; background-color: #e6efe6; padding: 2% 2.5%; border-radius: 10px; line-height: 2.0em;\">\n\u30fb\u3053\u306e\u30b3\u30fc\u30c9\u304b\u3063\u3053\u3044\u3044\u2026\u4f7f\u3063\u3066\u307f\u305f\u3044<br \/>\n\u30fb\u4f7f\u3046\u3068\u30b3\u30fc\u30c9\u306e\u884c\u6570\u304c\u6e1b\u3063\u3066\u30b9\u30c3\u30ad\u30ea\u3059\u308b\n<\/div>\n<p>\u3068\u304b\u52c9\u5f37\u306e\u30e2\u30c1\u30d9\u30fc\u30b7\u30e7\u30f3\u306b\u3082\u7e4b\u304c\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u306f\u500b\u4eba\u7684\u306b\u4f7f\u7528\u983b\u5ea6\u304c\u9ad8\u304f\u3001\u899a\u3048\u3066\u304a\u304f\u3068\u4fbf\u5229\u306a\u3082\u306e\u30923\u3064\u7d39\u4ecb\u3059\u308b\u306e\u3067\u305c\u3072\u899a\u3048\u3066\u3082\u3089\u3048\u305f\u3089\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<div class=\"pageContents\">\n<p class=\"title\">\u3082\u304f\u3058<\/p>\n<dl>\n<dt><a href=\"#step1\">\u5909\u6570\u5ba3\u8a00<\/a><\/dt>\n<dt><a href=\"#step2\">\u95a2\u6570\u5ba3\u8a00<\/a><\/dt>\n<dt><a href=\"#step3\">IF\u6587<\/a><\/dt>\n<\/dl>\n<\/div>\n<h2 id=\"step1\">\u5909\u6570\u5ba3\u8a00<\/h2>\n<p>\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u3059\u308b\u4e0a\u3067\u5fc5\u305a\u66f8\u304f\u3053\u3068\u306b\u306a\u308b\u5909\u6570\u5ba3\u8a00\u3067\u3059\u3002<br \/>\n1\u30641\u3064\u306f\u5c0f\u3055\u3044\u3082\u306e\u3067\u3059\u304c\u3001\u4f7f\u3046\u3053\u3068\u304c\u591a\u3044\u3082\u306e\u306a\u306e\u3067\u3057\u3063\u304b\u308a\u899a\u3048\u3066\u6642\u77ed\u3092\u76ee\u6307\u3057\u307e\u3057\u3087\u3046\uff01<\/p>\n<h3>\u901a\u5e38<\/h3>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-python\"><code>\/\/ \u8907\u6570\u306e\u5909\u6570\u3092\u4f5c\u6210\r\nlet a;\r\nlet b = \"test\";\r\n\r\n\/\/ \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\r\nlet c = new Object();\r\nlet c2 = new Object({\"name\":\"yamada\", \"age\":25});\r\n\r\n\/\/ \u914d\u5217\u3092\u4f5c\u6210\r\nlet d = new Array();\r\nlet d2 = new Array(\"\u30ea\u30f3\u30b4\", \"\u30d0\u30ca\u30ca\");\r\n<\/code><\/pre>\n<\/div>\n<h3>\u30b7\u30e7\u30fc\u30c8\u30cf\u30f3\u30c9<\/h3>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-python\"><code>\/\/ \u8907\u6570\u306e\u5909\u6570\u3092\u4f5c\u6210\r\nlet a, b = \"test\";  \/\/ console => a:undefined b:test\r\nlet a2 = b2 = \"test\";  \/\/ console => a2:test b2:test\r\n\r\n\/\/ \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\r\nlet c = {};\r\nlet c2 = {\"name\":\"yamada\", \"age\":25};\r\n\r\n\/\/ \u914d\u5217\u3092\u4f5c\u6210\r\nlet d = [];\r\nlet d2 = [\"\u30ea\u30f3\u30b4\", \"\u30d0\u30ca\u30ca\", \"\u30e1\u30ed\u30f3\"];\r\n<\/code><\/pre>\n<\/div>\n<h2 id=\"step2\">\u95a2\u6570\u5ba3\u8a00<\/h2>\n<p>&#8220;function&#8221;\u304b\u3089\u59cb\u307e\u308b\u95a2\u6570\u5ba3\u8a00\u306b\u3082\u30b7\u30e7\u30fc\u30c8\u30cf\u30f3\u30c9\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n\u7d30\u304b\u3044\u9055\u3044\u306f\u591a\u304f\u3042\u308a\u307e\u3059\u304c\u3001\u76ee\u306b\u3059\u308b\u3053\u3068\u3082\u591a\u3044\u3082\u306e\u306a\u306e\u3067\u899a\u3048\u3066\u304a\u304f\u3068\u4f55\u304b\u3068\u4fbf\u5229\u3067\u3059\u3002<\/p>\n<h3>\u901a\u5e38<\/h3>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-python\"><code>function display_alert(arg){\r\n  alert(arg);\r\n}\r\ndisplay_alert(\"\u30a2\u30e9\u30fc\u30c8\u3092\u8868\u793a\u3057\u307e\u3059\");\r\n<\/code><\/pre>\n<\/div>\n<h3>\u30b7\u30e7\u30fc\u30c8\u30cf\u30f3\u30c9<\/h3>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-python\"><code>display_alert = (arg) => {\r\n  alert(arg);\r\n}\r\ndisplay_alert(\"\u30a2\u30e9\u30fc\u30c8\u3092\u8868\u793a\u3057\u307e\u3059\");\r\n<\/code><\/pre>\n<\/div>\n<p>\u30b7\u30e7\u30fc\u30c8\u30cf\u30f3\u30c9\u306e\u65b9\u306f\u30a2\u30ed\u30fc\u95a2\u6570\u3068\u547c\u3070\u308c\u308b\u66f8\u5f0f\u3067\u3059\u3002<br \/>\n\u7d30\u304b\u3044\u9055\u3044\u306b\u3064\u3044\u3066\u306f\u4e0b\u8a18\u306e\u30b5\u30a4\u30c8\u304c\u89e3\u8aac\u3057\u3066\u304f\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u5c11\u3057\u96e3\u3057\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u4e00\u5ea6\u8aad\u3093\u3067\u304a\u304f\u3053\u3068\u3092\u30aa\u30b9\u30b9\u30e1\u3057\u307e\u3059\u3002<\/p>\n<div class=\"externalLink in_content\"><a href=\"https:\/\/qiita.com\/suin\/items\/a44825d253d023e31e4d\" target=\"_blank\" rel=\"noopener noreferrer\">JavaScript: \u901a\u5e38\u306e\u95a2\u6570\u3068\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u9055\u3044\u306f\u300c\u66f8\u304d\u65b9\u3060\u3051\u300d\u3067\u306f\u306a\u3044\u3002\u7570\u306a\u308b\u6027\u8cea\u304c10\u500b\u307b\u3069\u3042\u308b\u3002<\/a><\/div>\n<p>\u500b\u4eba\u7684\u306b\u4e00\u756a\u6ce8\u610f\u3057\u305f\u3044\u9055\u3044\u306f\u3001<span style=\"color:red;\">\u30b3\u30fc\u30eb\u3067\u304d\u308b\u5834\u6240\u304c\u5909\u308f\u308b<\/span>\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u5c11\u3057\u96e3\u3057\u3044\u8a71\u306b\u306a\u308a\u307e\u3059\u304c\u3001JavaScript\u306b\u306f\u51e6\u7406\u304c\u958b\u59cb\u3055\u308c\u308b\u6642\u70b9\u3067\u4f7f\u3048\u308b\u95a2\u6570\u3068\u3001\u4f7f\u3048\u306a\u3044\u95a2\u6570\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n\u30a2\u30ed\u30fc\u95a2\u6570\u306f\u5f8c\u8005\u3067\u3001\u5b9f\u884c\u3067\u304d\u308b\u30bf\u30a4\u30df\u30f3\u30b0\u306f\u30b3\u30fc\u30c9\u304c\u8aad\u307f\u8fbc\u307e\u308c\u305f\u5f8c\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n\u306a\u306e\u3067\u30b3\u30fc\u30c9\u4e0a\u3001\u30a2\u30ed\u30fc\u95a2\u6570\u3088\u308a\u3082\u4e0a\u3067\u95a2\u6570\u3092\u30b3\u30fc\u30eb\u3059\u308b\u3068[is not defined]\u3068\u3057\u3066\u95a2\u6570\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u3068\u30a8\u30e9\u30fc\u304c\u51fa\u3066\u3057\u307e\u3046\u306e\u3067\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2 id=\"step3\">IF\u6587<\/h2>\n<p>\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u57fa\u672c\u3068\u3082\u8a00\u3048\u308bif\u6587\u3067\u3059\u304c\u3001\u304b\u306a\u308a\u7701\u7565\u3057\u3066\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u76ee\u306b\u3059\u308b\u6a5f\u4f1a\u3082\u591a\u3044\u306e\u3067\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n<h3>\u901a\u5e38<\/h3>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-python\"><code>let name = \"sano\";\r\nif(name == \"sano\"){\r\n  alert(\"\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\");\r\n}else{\r\n  alert(\"\u30c7\u30b6\u30a4\u30ca\u30fc\");\r\n}\r\n<\/code><\/pre>\n<\/div>\n<h3>\u30b7\u30e7\u30fc\u30c8\u30cf\u30f3\u30c9<\/h3>\n<div class=\"hcb_wrap\">\n<pre class=\"prism line-numbers lang-python\"><code>let name = \"sano\";\r\n(name == \"sano\")? alert(\"\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\"): alert(\"\u30c7\u30b6\u30a4\u30ca\u30fc\");\r\n\r\n\/\/ \u5206\u5c90\u5f8c\u306e\u5024\u3092\u5909\u6570\u306b\u5165\u308c\u308b\u4f7f\u3044\u65b9\r\nlet job = (name == \"sano\")? \"WEB\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\": \"\u30c7\u30b6\u30a4\u30ca\u30fc\";\r\n\r\n\/\/ ()\u3082\u7701\u7565\u3067\u304d\u308b\r\nlet job2 = name == \"sano\"? \"WEB\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\": \"\u30c7\u30b6\u30a4\u30ca\u30fc\";\r\n<\/code><\/pre>\n<\/div>\n<p>\u901a\u5e38\u306e\u66f8\u304d\u65b9\u3060\u3068\u5358\u7d14\u306aif\u6587\u3067\u30825\u884c\u306f\u4f7f\u3046\u3053\u3068\u306b\u306a\u308b\u306e\u3067\u3001\u3069\u3046\u3057\u3066\u3082\u30b3\u30fc\u30c9\u304c\u9577\u304f\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<br \/>\n\u3057\u304b\u3057\u30b7\u30e7\u30fc\u30c8\u30cf\u30f3\u30c9\u3092\u4f7f\u3046\u3053\u3068\u30671\u884c\u306b\u306a\u308a\u3001\u30b9\u30c3\u30ad\u30ea\u3057\u305f\u3053\u3068\u3067\u53ef\u8aad\u6027\u3082\u9ad8\u307e\u308a\u307e\u3059\u3002<\/p>\n<hr style=\"margin-top: 50px;\"><\/hr>\n<p>\u3044\u304b\u304c\u3060\u3063\u305f\u3067\u3057\u3087\u3046\u304b\u3002<br \/>\n\u4eca\u56de\u306f\u521d\u6b69\u7684\u306a\u30b7\u30e7\u30fc\u30c8\u30cf\u30f3\u30c9\u306e\u7d39\u4ecb\u3067\u3057\u305f\u304c\u3001\u8abf\u3079\u3066\u307f\u308b\u3068\u4ed6\u306b\u3082\u305f\u304f\u3055\u3093\u3042\u308b\u306e\u3067\u9762\u767d\u3044\u3068\u601d\u3044\u307e\u3059\u3002<br \/>\n\u30b3\u30fc\u30c9\u306f\u77ed\u3051\u308c\u3070\u826f\u3044\u3063\u3066\u3082\u306e\u3067\u3082\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u5c11\u3057\u3067\u3082\u53c2\u8003\u306a\u308c\u3070\u5b09\u3057\u3044\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3001WEB\u306e\u4f50\u91ce\u3067\u3059\u3002 \u4eca\u56de\u306fJavaScript\u306e\u30b7\u30e7\u30fc\u30c8\u30cf\u30f3\u30c9\u306b\u3064\u3044\u3066\u7d39\u4ecb\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002 \u30b7\u30e7\u30fc\u30c8\u30cf\u30f3\u30c9\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u7c21\u7565\u5316\u3057\u305f\u66f8\u304d\u65b9\u306e\u3053\u3068\u3067\u3001\u5b66\u7fd2\u3092\u59cb\u3081\u305f\u3066\u306e\u4eba\u3060\u3068\u77e5\u3089\u306a\u3044\u4eba\u3082\u591a\u3044\u3093\u3058\u3083\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002 [&hellip;]<\/p>\n","protected":false},"author":25,"featured_media":6227,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[8],"tags":[42,94],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.otwo.jp\/blog\/wp-json\/wp\/v2\/posts\/6185"}],"collection":[{"href":"https:\/\/www.otwo.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.otwo.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.otwo.jp\/blog\/wp-json\/wp\/v2\/users\/25"}],"replies":[{"embeddable":true,"href":"https:\/\/www.otwo.jp\/blog\/wp-json\/wp\/v2\/comments?post=6185"}],"version-history":[{"count":44,"href":"https:\/\/www.otwo.jp\/blog\/wp-json\/wp\/v2\/posts\/6185\/revisions"}],"predecessor-version":[{"id":6232,"href":"https:\/\/www.otwo.jp\/blog\/wp-json\/wp\/v2\/posts\/6185\/revisions\/6232"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.otwo.jp\/blog\/wp-json\/wp\/v2\/media\/6227"}],"wp:attachment":[{"href":"https:\/\/www.otwo.jp\/blog\/wp-json\/wp\/v2\/media?parent=6185"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.otwo.jp\/blog\/wp-json\/wp\/v2\/categories?post=6185"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.otwo.jp\/blog\/wp-json\/wp\/v2\/tags?post=6185"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}