{"id":3407,"date":"2022-07-21T02:56:20","date_gmt":"2022-07-20T17:56:20","guid":{"rendered":"https:\/\/engineering.webstudio168.jp\/?p=3407"},"modified":"2022-07-21T02:56:21","modified_gmt":"2022-07-20T17:56:21","slug":"javascript-formatdate","status":"publish","type":"post","link":"https:\/\/engineering.webstudio168.jp\/blog\/blog\/2022\/07\/21\/javascript-formatdate\/","title":{"rendered":"\u3010\u30b3\u30d4\u30daOK\u3011JavaScript\u306e\u6c4e\u7528\u30e1\u30bd\u30c3\u30c9\u300cformatDate\u300d\u5168\u30b3\u30fc\u30c9\u63b2\u8f09\uff01\u65e5\u4ed8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306a\u3093\u3066\u7c21\u5358\u3067\u3059"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u3044\u308f\u3086\u308b\u300cformatDate\u300d\u306fJavaScript\u306eDate\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6307\u5b9a\u3057\u305f\u3044\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306b\u5909\u63db\u3059\u308b\u969b\u306b\u975e\u5e38\u306b\u4fbf\u5229\u306a\u6c4e\u7528\u30b3\u30fc\u30c9\u3067\u3059\u3002JavaScript\u6a19\u6e96\u306e\u95a2\u6570\u3067\u306f\u306a\u304f\u3001\u81ea\u524d\u3067\u5ba3\u8a00\u3057\u5b9f\u884c\u3059\u308b\u6d41\u308c\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3068\u3048\u3070YYYYMMDD\u5f62\u5f0f\u3067\u3042\u308c\u3070\u3001\u5f15\u6570\u306bDate\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u4e00\u7dd2\u306b\u6e21\u3057\u3066\u3042\u3052\u308b\u3068\u3001Date\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u81ea\u52d5\u7684\u306bYYYYMMDD\u306e\u65e5\u4ed8\u306b\u5909\u63db\u3055\u308c\u3066\u8fd4\u3057\u3066\u304f\u308c\u308b\u3068\u3044\u3063\u305f\u512a\u308c\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u662f\u975e\u3001\uff11\u30b5\u30a4\u30c8\u306b\uff11\u3053\u5b9f\u88c5\u3057\u3066\u304a\u304f\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002\u30b3\u30fc\u30c9\u306e\u96e3\u6613\u5ea6\u3082\u304b\u306a\u308a\u4f4e\u3044\u306e\u3067\u3001\u307e\u308b\u307e\u308b\u30b3\u30d4\u30da\u3067\u3082\u554f\u984c\u306a\u304f\u52d5\u4f5c\u3059\u308b\u3053\u3068\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6481058887327275\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-6481058887327275\" data-ad-slot=\"6649918654\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script>\n\n\n\n<h2 class=\"wp-block-heading\">formatDate\u5168\u6587\u63b2\u8f09<\/h2>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"formatDate.js\" data-lang=\"JavaScript\"><code>function formatDate (date, format) {\n  format = format.replace(\/yyyy\/g, date.getFullYear());\n  format = format.replace(\/MM\/g, (&#39;0&#39; + (date.getMonth() + 1)).slice(-2));\n  format = format.replace(\/dd\/g, (&#39;0&#39; + date.getDate()).slice(-2));\n  format = format.replace(\/HH\/g, (&#39;0&#39; + date.getHours()).slice(-2));\n  format = format.replace(\/mm\/g, (&#39;0&#39; + date.getMinutes()).slice(-2));\n  format = format.replace(\/ss\/g, (&#39;0&#39; + date.getSeconds()).slice(-2));\n  format = format.replace(\/SSS\/g, (&#39;00&#39; + date.getMilliseconds()).slice(-3));\n  return format;\n};<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ed5\u7d44\u307f\u306f\u5b9f\u306b\u7c21\u5358\u3067\u3001Date\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5e74\u3001\u6708\u3001\u65e5\u306a\u3069\u3092<code>replace()<\/code>\u3067\u7f6e\u63db\u3057\u3066\u3044\u308b\u3060\u3051\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5229\u7528\u3059\u308b\u969b\u306f\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3092\u307e\u308b\u307e\u308b\u30b3\u30d4\u30fc\u3057\u3066\u3001\u3054\u81ea\u8eab\u306ejs\u30d5\u30a1\u30a4\u30eb\u7b49\u306b\u5f35\u308a\u4ed8\u3051\u3066\u304f\u3060\u3055\u3044\u3002\u4f7f\u3044\u65b9\u306f\u4e0b\u8a18\u306e\u3088\u3046\u306bformatDate\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3066\u3042\u3052\u308b\u3060\u3051\u3067OK\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"formatDate-do.js\" data-lang=\"JavaScript\"><code>\/\/ 2022\u5e747\u670821\u65e52\u66427\u520632\u79d28\u30df\u30ea\u79d2\nvar sampleDate = new Date(2022, 6, 21, 2, 7, 32, 8);\n\nconsole.log(formatDate(sampleDate, &#39;yyyyMMdd&#39;));<\/code><\/pre><\/div>\n\n\n\n<script>\nfunction formatDate (date, format) {\n  format = format.replace(\/yyyy\/g, date.getFullYear());\n  format = format.replace(\/MM\/g, ('0' + (date.getMonth() + 1)).slice(-2));\n  format = format.replace(\/dd\/g, ('0' + date.getDate()).slice(-2));\n  format = format.replace(\/HH\/g, ('0' + date.getHours()).slice(-2));\n  format = format.replace(\/mm\/g, ('0' + date.getMinutes()).slice(-2));\n  format = format.replace(\/ss\/g, ('0' + date.getSeconds()).slice(-2));\n  format = format.replace(\/SSS\/g, ('00' + date.getMilliseconds()).slice(-3));\n  return format;\n};\n\/\/ 2022\u5e747\u670821\u65e52\u66427\u520632\u79d28\u30df\u30ea\u79d2\nvar sampleDate = new Date(2022, 6, 21, 2, 7, 32, 8);\nconsole.log(formatDate(sampleDate, 'yyyyMMdd'));\n<\/script>\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6481058887327275\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-6481058887327275\" data-ad-slot=\"6649918654\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f7f\u7528\u4e0a\u306e\u6ce8\u610f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u306f\u3001Date\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5ba3\u8a00\u3059\u308b\u969b\u306b\u9055\u548c\u611f\u304c\u3042\u3063\u305f\u306e\u5206\u304b\u308a\u307e\u3057\u305f\u304b\u306d\uff1f\uff1f<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"newDate.js\" data-lang=\"JavaScript\"><code>var sampleDate = new Date(2022, 6, 21, 2, 7, 32, 8);<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">7\u670821\u65e5\u3092\u6307\u5b9a\u3057\u3066\u3044\u308b\u3093\u3067\u3059\u304c\u3001\u4e0a\u8a18\u30bd\u30fc\u30b9\u3067\u306f\u300c2022, <strong>6<\/strong>, 21\u300d\u306b\u306a\u3063\u3066\u3044\u308b\u3093\u3067\u3059\u306d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u306f\u300c\u6708\u300d\u306b\u95a2\u3057\u3066\u306fDate\u6307\u5b9a\u3059\u308b\u969b\u306b\u305d\u306e\u6708\u30de\u30a4\u30ca\u30b9\uff11\u3092\u6307\u5b9a\u3057\u3066\u3042\u3052\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001formatDate\u30e1\u30bd\u30c3\u30c9\u5185\u306b\u3042\u308b\u3001<code>date.getMonth()<\/code>\u306e\u4ed5\u69d8\u306b\u3088\u308b\u3082\u306e\u3067\u6b62\u3080\u7121\u3057\u306a\u306e\u3067\u3059\u3002date.getMonth()\u306f\u30011\u6708\u306f0\u6708\u30012\u6708\u306f1\u6708\u3001\u3068\u3044\u3063\u305f\u3088\u3046\u306b1\u6708\uff08\u3064\u304d\uff09\u30ba\u30ec\u308b\u6027\u8cea\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u30ba\u30ec\u304c\u306a\u305c\u8d77\u3053\u308b\u306e\u304b\u306e\u7406\u7531\u3067\u3059\u304c\u3001\u8af8\u8aac\u3042\u308a\u3001\u300c\u6642\u3001\u5206\u3001\u79d2\u300d\u306a\u3069\u306f\u300c0\u300d\u304b\u3089\u59cb\u307e\u308b\u305f\u3081\u3001\u30bc\u30ed\u306b\u5408\u308f\u305b\u305f\u3068\u3044\u3046\u3082\u306e\u3084\u3001\u305d\u3082\u305d\u3082\u82f1\u8a9e\u3067\u300c\u6708\u300d\u306e\u8868\u8a18\u306f\u300cJanuary\u300d\u300cFebruary\u300d\u306a\u306e\u3067\u6570\u5b57\u306b\u7f6e\u304d\u63db\u3048\u308b\u611f\u899a\u304c\u306a\u304b\u3063\u305f\u305f\u3081\u3001\u300c0\u304b\u308911\u300d\u3067\u6708\u3092\u8868\u73fe\u3057\u305f\u306a\u3069\u306e\u7406\u7531\u304c\u3042\u308b\u3088\u3046\u3067\u3059\u3002\u3067\u3059\u304c\u3001\u6700\u3082\u6709\u529b\u3060\u308d\u3046\u3068\u601d\u308f\u308c\u308b\u306e\u306fBrendan Eich\u6c0f\u3068\u3044\u3046JavaScript\u306e\u4f5c\u6210\u8005\u304c\u300cJS&#8217;s Date is a copy of Java&#8217;s JDK1.0 (1995) java.util.Date. Made it look like Java&#8230;\u300d\u3068\u30c4\u30a4\u30fc\u30c8\u3057\u3066\u3044\u308b\u3053\u3068\u304b\u3089\u3001Java\u306eutil.Date\u3068\u540c\u69d8\u306e\u4ed5\u69d8\u3092\u63a1\u7528\u3057\u305f\u3053\u3068\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3044\u305a\u308c\u306b\u305b\u3088\u3001getMonth()\u306f0\u304b\u308911\u306e\u6570\u5b57\u304c\u8fd4\u3063\u3066\u304f\u308b\u3053\u3068\u306b\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\u306d\u3002<\/p>\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6481058887327275\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-6481058887327275\" data-ad-slot=\"6649918654\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script>\n\n\n\n<h2 class=\"wp-block-heading\">formatDate\u306e\u4f7f\u7528\u65b9\u6cd5<\/h2>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"formatDate-do-2.js\" data-lang=\"JavaScript\"><code>\/\/ 2022\u5e747\u670821\u65e52\u66427\u520632\u79d28\u30df\u30ea\u79d2\nvar sampleDate = new Date(2022, 6, 21, 2, 7, 32, 8);\n\nconsole.log(formatDate(sampleDate, &#39;yyyyMMdd&#39;));\nconsole.log(formatDate(sampleDate, &#39;yyyyMMdd&#39;));\nconsole.log(formatDate(sampleDate, &#39;yyyyMMddHHmmssSSS&#39;));\nconsole.log(formatDate(sampleDate, &#39;yyyy\/MM\/dd&#39;));\nconsole.log(formatDate(sampleDate, &#39;yyyy-MM-dd&#39;));\nconsole.log(formatDate(sampleDate, &#39;HH:mm&#39;));\nconsole.log(formatDate(sampleDate, &#39;HH:mm:ss:SSS&#39;));<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u307e\u305a\u3001Date\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">formatDate()\u306e\u7b2c\u4e00\u5f15\u6570\u306b\u4f5c\u6210\u3057\u305fDate\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u3001\u7b2c\u4e8c\u5f15\u6570\u306b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u578b\u3092\u5165\u308c\u307e\u3059\u3002\u305d\u308c\u305e\u308c\u5b9f\u884c\u3059\u308b\u3068\u3001\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u578b\u306b\u6e96\u3058\u305f\u65e5\u4ed8\u306e\u5f62\u306b\u306a\u3063\u3066\u8fd4\u3063\u3066\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u96e3\u3057\u3044\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u306d\u3002\u30e9\u30a4\u30bb\u30f3\u30b9\u3082\u4f55\u3082\u306a\u3044\u306e\u3067\u3069\u3093\u3069\u3093\u4f7f\u3063\u3066OK\u3067\u3059\u306e\u3067\u7a4d\u6975\u7684\u306b\u53d6\u308a\u5165\u308c\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6481058887327275\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-6481058887327275\" data-ad-slot=\"6649918654\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script>\n","protected":false},"excerpt":{"rendered":"<p>\u3044\u308f\u3086\u308b\u300cformatDate\u300d\u306fJavaScript\u306eDate\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6307\u5b9a\u3057\u305f\u3044\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306b\u5909\u63db\u3059\u308b\u969b\u306b\u975e\u5e38\u306b\u4fbf\u5229\u306a\u6c4e\u7528\u30b3\u30fc\u30c9\u3067\u3059\u3002JavaScript\u6a19\u6e96\u306e\u95a2\u6570\u3067\u306f\u306a\u304f\u3001\u81ea\u524d\u3067\u5ba3\u8a00\u3057\u5b9f\u884c\u3059\u308b\u6d41\u308c\u3068\u306a\u308a\u307e\u3059\u3002  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3425,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[55,43],"tags":[8,87,39,48,16],"class_list":["post-3407","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-javascript","category-43","tag-javascript","tag-87","tag-39","tag-48","tag-16"],"_links":{"self":[{"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/posts\/3407","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/comments?post=3407"}],"version-history":[{"count":17,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/posts\/3407\/revisions"}],"predecessor-version":[{"id":3424,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/posts\/3407\/revisions\/3424"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/media\/3425"}],"wp:attachment":[{"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/media?parent=3407"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/categories?post=3407"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/tags?post=3407"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}