{"id":2032,"date":"2025-06-16T08:15:34","date_gmt":"2025-06-16T08:15:34","guid":{"rendered":"https:\/\/satokotadesign.com\/blog\/?p=2032"},"modified":"2025-06-16T08:15:34","modified_gmt":"2025-06-16T08:15:34","slug":"js_countdown-timer","status":"publish","type":"post","link":"https:\/\/satokotadesign.com\/blog\/js_countdown-timer\/","title":{"rendered":"JavaScript\u3067\u6b8b\u308a\u6642\u9593\u3092\u30ab\u30a6\u30f3\u30c8\u30c0\u30a6\u30f3\u8868\u793a\uff5c\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u6e1b\u308b\u6587\u5b57\u6f14\u51fa\u306e\u5b9f\u88c5\u65b9\u6cd5"},"content":{"rendered":"<h2 class=\"sc_heading solid blue\"><span class=\"sc_title\">\u6587\u5b57\u304c\u30ab\u30a6\u30f3\u30c8\u30c0\u30a6\u30f3\u3059\u308b\u300c\u6b8b\u308a\u6642\u9593\u300d\u8868\u793a\u3092JavaScript\u3067\u5b9f\u88c5\u3057\u3088\u3046<\/span><\/h2>\n<p>\u3053\u3093\u306b\u3061\u306f\uff01\u9759\u5ca1\u770c\u6d5c\u677e\u5e02\u3067WEB\u30c7\u30b6\u30a4\u30ca\u30fc\u3092\u3057\u3066\u3044\u307e\u3059\u5c0f\u7027\u3067\u3059\u3002<\/p>\n<p>\u671f\u9593\u9650\u5b9a\u306e\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u3084\u30bb\u30fc\u30eb\u3001\u3042\u308b\u3044\u306f\u30d5\u30a9\u30fc\u30e0\u306e\u5236\u9650\u6642\u9593\u306a\u3069\u3001\u300c\u3042\u3068\u3007\u3007\u79d2\u3067\u7d42\u4e86\u300d\u300c\u6b8b\u308a3\u5206\u3067\u3059\u300d\u3068\u3044\u3063\u305f\u30ab\u30a6\u30f3\u30c8\u30c0\u30a6\u30f3\u8868\u793a\u306f\u3001Web\u4e0a\u3067\u3088\u304f\u898b\u304b\u3051\u307e\u3059\u3088\u306d\u3002<\/p>\n<p>\u3053\u306e\u3088\u3046\u306a\u201c\u6b8b\u308a\u6642\u9593\u201d\u306e\u8868\u793a\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u884c\u52d5\u3092\u5f8c\u62bc\u3057\u3057\u305f\u308a\u3001<span class=\"sc_marker-animation\">\u7dca\u6025\u6027\u3092\u6f14\u51fa\u3059\u308b\u306e\u306b\u3068\u3066\u3082\u52b9\u679c\u7684<\/span>\u3002<\/p>\n<p>\u3057\u304b\u3082\u3001JavaScript\u3092\u4f7f\u3048\u3070\u7c21\u5358\u306b\u5b9f\u88c5\u53ef\u80fd\uff01<br \/>\n\u4eca\u56de\u306f\u3001\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u3067\u6587\u5b57\u304c\u6e1b\u3063\u3066\u3044\u304f\u30ab\u30a6\u30f3\u30c8\u30c0\u30a6\u30f3\u30bf\u30a4\u30de\u30fc\u3092\u3001\u521d\u5fc3\u8005\u306e\u65b9\u3067\u3082\u3059\u3050\u4f7f\u3048\u308b\u5f62\u3067\u4e01\u5be7\u306b\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h2 class=\"sc_heading solid blue\"><span class=\"sc_title\">\u6b8b\u308a\u6642\u9593\u306e\u30ab\u30a6\u30f3\u30c8\u30c0\u30a6\u30f3\u3063\u3066\u3001\u3069\u3053\u3067\u4f7f\u3048\u308b\uff1f<\/span><\/h2>\n<p>\u30ab\u30a6\u30f3\u30c8\u30c0\u30a6\u30f3\u8868\u793a\u306e\u6d3b\u7528\u30b7\u30fc\u30f3\u306f\u5e45\u5e83\u304f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5834\u6240\u3067\u52b9\u679c\u3092\u767a\u63ee\u3057\u307e\u3059\u3002<\/p>\n<div class=\"sc_frame_wrap inline blue\">\n<div class=\"sc_frame no-title\"        >\n<div class=\"sc_designlist ul fa_check blue\">\n<ul>\n<li>EC\u30b5\u30a4\u30c8\u306e\u5546\u54c1\u30da\u30fc\u30b8\uff08\u30bf\u30a4\u30e0\u30bb\u30fc\u30eb\uff09<\/li>\n<li>\u7533\u8fbc\u30fb\u4e88\u7d04\u30d5\u30a9\u30fc\u30e0\uff08\u6b8b\u308a\u6642\u9593\u5236\u9650\u3042\u308a\uff09<\/li>\n<li>\u30a4\u30d9\u30f3\u30c8\u30fb\u30e9\u30a4\u30d6\u914d\u4fe1\u30da\u30fc\u30b8\uff08\u958b\u59cb\u307e\u3067\u306e\u30ab\u30a6\u30f3\u30c8\uff09<\/li>\n<li>\u30af\u30a4\u30ba\u3084\u8a66\u9a13\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u5236\u9650\u6642\u9593<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001<span class=\"sc_marker-animation\">\u300c\u6642\u9593\u306b\u5236\u9650\u304c\u3042\u308b\u300d\u3053\u3068\u3092\u53ef\u8996\u5316\u3059\u308b\u3060\u3051\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u96c6\u4e2d\u529b\u3084\u884c\u52d5\u610f\u6b32\u304c\u30b0\u30c3\u3068\u4e0a\u304c\u308b<\/span>\u3093\u3067\u3059\u3002<\/p>\n<h2 class=\"sc_heading solid blue\"><span class=\"sc_title\">\u57fa\u672c\u306e\u30ab\u30a6\u30f3\u30c8\u30c0\u30a6\u30f3\uff1a\u3042\u3068\u3007\u3007\u79d2<\/span><\/h2>\n<p>\u6700\u3082\u30b7\u30f3\u30d7\u30eb\u306a\u300c\u3007\u3007\u79d2\u5f8c\u306b\u7d42\u4e86\u300d\u3068\u3044\u3046\u5f62\u5f0f\u304b\u3089\u59cb\u3081\u307e\u3057\u3087\u3046\u3002<br \/>\n1\u79d2\u3054\u3068\u306b <span class=\"fontbackground\" style=\"background:;\">remaining<\/span> \u306e\u5024\u3092\u6e1b\u3089\u3057\u306a\u304c\u3089\u3001HTML\u306e\u8868\u793a\u3082\u66f4\u65b0\u3002<br \/>\n0\u79d2\u306b\u306a\u3063\u305f\u3089 <span class=\"fontbackground\" style=\"background:;\">clearInterval() <\/span>\u3067\u6b62\u3081\u3066\u3001\"\u7d42\u4e86\"\u306e\u6587\u5b57\u3092\u8868\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p class=\"codepen\" data-height=\"300\" data-default-tab=\"html,result\" data-slug-hash=\"GgJBpVr\" data-pen-title=\"Untitled\" data-user=\"ekwwawpb-the-styleful\" style=\"height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n  <span>See the Pen <a href=\"https:\/\/codepen.io\/ekwwawpb-the-styleful\/pen\/GgJBpVr\"><br \/>\n  Untitled<\/a> by \u5c0f\u7027\u8ce2 (<a href=\"https:\/\/codepen.io\/ekwwawpb-the-styleful\">@ekwwawpb-the-styleful<\/a>)<br \/>\n  on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n<\/p>\n<p><script async src=\"https:\/\/public.codepenassets.com\/embed\/index.js\"><\/script><\/p>\n<h2 class=\"sc_heading solid blue\"><span class=\"sc_title\">\u5fdc\u7528\uff1a\u5206\u30fb\u79d2\u5f62\u5f0f\u306b\u3059\u308b\uff08\u6b8b\u308a2:59\u306a\u3069\uff09<\/span><\/h2>\n<p>\u3082\u3046\u5c11\u3057\u5b9f\u7528\u7684\u306b\u3001\u300c\u6b8b\u308a 2\u520630\u79d2\u300d\u306a\u3069\u3068\u8868\u793a\u3057\u305f\u3044\u5834\u5408\u306f\u3053\u3061\u3089\u3002<br \/>\n<span class=\"fontbackground\" style=\"background:;\">padStart(2, '0') <\/span>\u3092\u4f7f\u3063\u3066\u3001\u79d2\u6570\u304c\u300c00\u301c09\u300d\u306b\u306a\u308b\u3068\u304d\u3082\u898b\u3084\u3059\u304f\u8868\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p class=\"codepen\" data-height=\"300\" data-default-tab=\"html,result\" data-slug-hash=\"raVrOXR\" data-pen-title=\"Untitled\" data-user=\"ekwwawpb-the-styleful\" style=\"height: 300px; box-sizing: border-box; display: flex; align-items: center; justify-content: center; border: 2px solid; margin: 1em 0; padding: 1em;\">\n  <span>See the Pen <a href=\"https:\/\/codepen.io\/ekwwawpb-the-styleful\/pen\/raVrOXR\"><br \/>\n  Untitled<\/a> by \u5c0f\u7027\u8ce2 (<a href=\"https:\/\/codepen.io\/ekwwawpb-the-styleful\">@ekwwawpb-the-styleful<\/a>)<br \/>\n  on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<\/span>\n<\/p>\n<p><script async src=\"https:\/\/public.codepenassets.com\/embed\/index.js\"><\/script><\/p>\n<h2 class=\"sc_heading solid blue\"><span class=\"sc_title\">\u3055\u3089\u306b\u9032\u5316\uff1a\u30ab\u30a6\u30f3\u30c8\u7d42\u4e86\u5f8c\u306b\u753b\u9762\u9077\u79fb\u3084\u975e\u8868\u793a\u3082\u53ef\u80fd<\/span><\/h2>\n<p>\u7d42\u4e86\u6642\u306b\u300c\u3042\u308a\u304c\u3068\u3046\u30da\u30fc\u30b8\u300d\u3078\u9077\u79fb\u3057\u305f\u3044\u5834\u5408\u3084\u3001\u30bf\u30a4\u30de\u30fc\u3092\u975e\u8868\u793a\u306b\u3057\u305f\u3044\u3068\u304d\u306f\u3001<span class=\"fontbackground\" style=\"background:;\">clearInterval<\/span> \u306e\u5f8c\u306b\u4ee5\u4e0b\u3092\u8ffd\u52a0\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"line-numbers\" ><code class=\"language-js\">\/\/ \u30da\u30fc\u30b8\u9077\u79fb\r\nwindow.location.href = &quot;\/thanks.html&quot;;\r\n\r\n\/\/ \u8981\u7d20\u3092\u975e\u8868\u793a\r\ncountdownEl.parentElement.style.display = &quot;none&quot;;\r\n<\/code><\/pre>\n<p>\u30e6\u30fc\u30b6\u30fc\u4f53\u9a13\u306b\u5fdc\u3058\u3066\u3001\u30d0\u30ca\u30fc\u975e\u8868\u793a\u30fb\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u8868\u793a\u30fb\u30d5\u30a9\u30fc\u30e0\u7121\u52b9\u5316\u306a\u3069\u3082\u81ea\u5728\u306b\u8a2d\u8a08\u3067\u304d\u307e\u3059\uff01<\/p>\n<h2 class=\"sc_heading solid blue\"><span class=\"sc_title\">\u6ce8\u610f\u70b9\uff1a\u6642\u9593\u306e\u4fe1\u983c\u6027\u3068\u6574\u5408\u6027<\/span><\/h2>\n<p>JavaScript\u306f\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30b5\u30a4\u30c9\uff08\u95b2\u89a7\u8005\u306e\u30d6\u30e9\u30a6\u30b6\uff09\u3067\u52d5\u304f\u305f\u3081\u3001\u60aa\u610f\u3042\u308b\u30e6\u30fc\u30b6\u30fc\u304c\u30bf\u30a4\u30de\u30fc\u3092\u7121\u8996\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<br \/>\n\u305d\u306e\u305f\u3081\u3001<span class=\"sc_marker-animation\">\u91cd\u8981\u306a\u671f\u9650\uff08\u652f\u6255\u3044\u3001\u7533\u8fbc\u7de0\u5207\u306a\u3069\uff09\u306f\u5fc5\u305a\u30b5\u30fc\u30d0\u30fc\u5074\u3067\u3082\u30c1\u30a7\u30c3\u30af\u3059\u308b<\/span>\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2 class=\"sc_heading solid blue\"><span class=\"sc_title\">\u307e\u3068\u3081\uff1a\u30ab\u30a6\u30f3\u30c8\u30c0\u30a6\u30f3\u306f\u201c\u4eca\u201d\u52d5\u304b\u3059\u529b\u3092\u6301\u3063\u3066\u3044\u308b<\/span><\/h2>\n<p>\u300c\u3042\u3068\u4f55\u5206\u300d\u300c\u3042\u306810\u79d2\u300d\u3068\u3044\u3063\u305f\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306e\u30ab\u30a6\u30f3\u30c8\u30c0\u30a6\u30f3\u306f\u3001<br \/>\nWeb\u30b5\u30a4\u30c8\u306b\u7dca\u5f35\u611f\u3068\u884c\u52d5\u559a\u8d77\u3092\u3082\u305f\u3089\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n<p>JavaScript\u306a\u3089\u3001\u307b\u3093\u306e\u6570\u884c\u3067\u5b9f\u88c5\u3067\u304d\u3066\u3001\u3057\u304b\u3082\u898b\u305f\u76ee\u306b\u3082\u76f4\u611f\u7684\u3002<br \/>\n<mark>\u30e6\u30fc\u30b6\u30fc\u306e\u6ce8\u76ee\u3092\u5f15\u304d\u305f\u3044\u30fb\u884c\u52d5\u3092\u4fc3\u3057\u305f\u3044<\/mark>\u3068\u304d\u306f\u3001\u305c\u3072\u3053\u306e\u30ab\u30a6\u30f3\u30c8\u30c0\u30a6\u30f3\u6f14\u51fa\u3092\u8a66\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n<p>&nbsp;<\/p>\n<h2 class=\"sc_heading solid red\"><span class=\"sc_title\">satokotadesign\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u5b9f\u65bd\u4e2d\uff01<\/span><\/h2>\n<div class=\"campaign_bnr\" style=\"margin:0 5%;\"><a href=\"https:\/\/hamameshi.jp\/\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" src=\"https:\/\/satokotadesign.com\/img\/bnr-hamameshi.webp\" alt=\"\u6d5c\u677e\u5e02\u306e\u98f2\u98df\u5e97\u9650\u5b9a\uff5c\u30db\u30fc\u30e0\u30da\u30fc\u30b8\u7121\u6599\u4f5c\u6210\u30b5\u30fc\u30d3\u30b9\" style=\"border: 3px solid #00a08c;border-radius: 20px;\"><\/a><\/div>\n<div class=\"campaign_bnr\" style=\"margin:0 5%;\"><a href=\"https:\/\/satokotadesign.com\/contact\/\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" data-src=\"https:\/\/satokotadesign.com\/img\/bnr-onayami.png\" alt=\"\u3076\u3063\u3061\u3083\u3051\u7121\u6599\u76f8\u8ac7\u4f1a\uff01\u30db\u30fc\u30e0\u30da\u30fc\u30b8\u5236\u4f5c\u306e\u60a9\u307f\u8a71\u3057\u3066\u307f\u307e\u305b\u3093\u304b\uff1f\" style=\"border: 3px solid #f02025;border-radius: 20px;\" class=\"lazyload\" \/><\/a><\/div>\n<div class=\"campaign_bnr\"  style=\"margin:0 5%;\"><a href=\"https:\/\/satokotadesign.com\/contact\/\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" data-src=\"https:\/\/satokotadesign.com\/img\/bnr-kansyasai.png\" alt=\"satokotadesign4\u5468\u5e74\u8a18\u5ff5\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\" style=\"border: 3px solid #4183fe;border-radius: 20px;\" class=\"lazyload\" \/><\/a><\/div>\n<p><figure id=\"attachment_475\" aria-describedby=\"caption-attachment-475\" style=\"width: 1500px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/satokotadesign.com\/\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" data-src=\"https:\/\/satokotadesign.com\/blog\/wp-content\/uploads\/2022\/10\/bnr.jpg\" alt=\"\u9759\u5ca1\u770c\u6d5c\u677e\u5e02\u3067\u30db\u30fc\u30e0\u30da\u30fc\u30b8\u5236\u4f5c\u306a\u3089satokotadesign\" width=\"1500\" height=\"500\" class=\"size-full wp-image-475 lazyload\" data-srcset=\"https:\/\/satokotadesign.com\/blog\/wp-content\/uploads\/2022\/10\/bnr.jpg 1500w, https:\/\/satokotadesign.com\/blog\/wp-content\/uploads\/2022\/10\/bnr-500x167.jpg 500w, 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