{"id":29821,"date":"2017-08-15T08:43:28","date_gmt":"2017-08-14T23:43:28","guid":{"rendered":"http:\/\/www.sejuku.net\/blog\/?p=29821"},"modified":"2025-12-29T17:03:12","modified_gmt":"2025-12-29T08:03:12","slug":"%e3%80%90javascript%e5%85%a5%e9%96%80%e3%80%91alert%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%e3%81%be%e3%81%a8%e3%82%81","status":"publish","type":"post","link":"https:\/\/www.sejuku.net\/blog\/29821","title":{"rendered":"\u3010JavaScript\u5165\u9580\u3011alert(\u30a2\u30e9\u30fc\u30c8)\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3053\u308c\u3067\u5b8c\u74a7\u3002\u4f7f\u3044\u65b9\u3092\u7dcf\u307e\u3068\u3081\uff01"},"content":{"rendered":"\n<p>\u30b5\u30a4\u30c8\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u6642\u306b\u3001\u30a8\u30e9\u30fc\u304c\u8d77\u304d\u305f\u3053\u3068\u306a\u3069\u3092\u77e5\u3089\u305b\u308b\u30e1\u30c3\u30bb\u30fc\u30b8\u30dc\u30c3\u30af\u30b9\u304c\u8868\u793a\u3055\u308c\u305f\u7d4c\u9a13\u3092\u3082\u3064\u65b9\u3082\u591a\u3044\u3068\u601d\u3044\u307e\u3059\u3002JavaScript\u3067\u306f\u305d\u306e\u3088\u3046\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u30dc\u30c3\u30af\u30b9\u3092\u8868\u793a\u3059\u308b\u305f\u3081\u306balert(\u30a2\u30e9\u30fc\u30c8)\u3068\u547c\u3070\u308c\u308b\u4ed5\u7d44\u307f\u304c\u5b58\u5728\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><div class=\"box_voice\">\u30a2\u30e9\u30fc\u30c8\u3063\u3066\u4f55\u3060\u308d\u3046\uff1f<br>\u3069\u3046\u3084\u3063\u3066\u4f7f\u3046\u3093\u3060\u308d\u3046\uff1f<\/div><\/p>\n\n\n\n<p>\u305d\u3093\u306a\u7591\u554f\u3092\u89e3\u6d88\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01\u4eca\u56de\u306f\u3001JavaScript\u306e\u30a2\u30e9\u30fc\u30c8\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u306f\u3001\u4e0b\u8a18\u306e\u6d41\u308c\u3067\u89e3\u8aac\u3092\u9032\u3081\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n<div class=\"box01\">\n\n\n\n<ul class=\"wp-block-list\">\n<li><b>\u3010\u57fa\u790e\u3011\u30a2\u30e9\u30fc\u30c8\u3068\u306f\uff1f<\/b><\/li>\n\n\n\n<li><b>\u3010\u57fa\u790e\u3011alert()\u306e\u4f7f\u3044\u65b9<\/b><\/li>\n\n\n\n<li><b>\u3010\u57fa\u790e\u3011\u3044\u308d\u3044\u308d\u306a\u5185\u5bb9\u306e\u30a2\u30e9\u30fc\u30c8\u3092\u51fa\u3057\u3066\u307f\u3088\u3046<\/b><\/li>\n\n\n\n<li><b>\u3010\u767a\u5c55\u3011alert()\u306e\u6d3b\u7528\u65b9\u6cd5<\/b><\/li>\n\n\n\n<li><b>\u3010\u767a\u5c55\u3011alert()\u306b\u9078\u629e\u80a2\u3092\u51fa\u305b\u308b\u30e1\u30bd\u30c3\u30c9\u306a\u3069<\/b><\/li>\n<\/ul>\n\n\n<\/div>\n\n\n\n<p>alert\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u6b63\u3057\u304f\u7406\u89e3\u3057\u3001\u5fc5\u8981\u306a\u5834\u9762\u3067\u4f7f\u3044\u3053\u306a\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u3061\u3083\u3044\u307e\u3057\u3087\u3046\uff01<\/p>\n\n\n\n<p>\u3053\u308c\u304b\u3089Javascript\u306e\u30b9\u30ad\u30eb\u3092\u5411\u4e0a\u3055\u305b\u3066\u3044\u304d\u305f\u3044\u65b9\u306b\u5411\u3051\u3066\u3001\u304a\u3059\u3059\u3081\u306eJavascript\u5b66\u7fd2\u30b5\u30a4\u30c816\u9078\u3092\u5225\u3067\u7d39\u4ecb\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u305d\u3061\u3089\u3082\u305c\u3072\u53c2\u8003\u306b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n            <a href=\"https:\/\/www.sejuku.net\/blog\/227918\" class=\"blog-card-anchor\">\n                <div class=\"blog-card\">\n                <div class=\"blog-card-content\">\n                    <div class=\"blog-card-thumbnail\">\n                    <img decoding=\"async\" class=\"blog-card-thumbnail-img\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2023\/11\/howto-03-1-150x85.png\">\n                    <\/div>\n                    <div class=\"blog-card-title-wrap\">\n                    <div class=\"blog-card-title\">Javascript\u306e\u304a\u3059\u3059\u3081\u5b66\u7fd2\u30b5\u30a4\u30c816\u9078\uff01\u9078\u3076\u30b3\u30c4\u3084\u6ce8\u610f\u70b9\u3092\u89e3\u8aac<\/div>\n                    <div class=\"blog-card-update-date\">\u66f4\u65b0\u65e5\uff1a2025\u5e7412\u670826\u65e5<\/div>\n                    <\/div>\n                <\/div>\n                <\/div>\n            <\/a>\n            \n\n\n\n<p>\u306a\u304a\u3001\u4f11\u65e5\u3084\u3075\u3068\u7a7a\u3044\u305f\u3059\u304d\u307e\u6642\u9593\u306b\u53ce\u5165\u304c\u5897\u3084\u305b\u308b\u30b9\u30ad\u30eb\u3092\u8eab\u306b\u3064\u3051\u305f\u3044\u4eba\u306f\u3001\u305c\u3072<strong>\u300c<a href=\"https:\/\/lp.sejuku.net\/lp1_blog_02\/?cid=lp_text_cta\">\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2<\/a>\u300d<\/strong>\u3092\u304a\u8a66\u3057\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<p>\u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u3067\u306f\u73fe\u5f79\u30a8\u30f3\u30b8\u30cb\u30a2\u3068\u5b66\u7fd2\u30b3\u30fc\u30c1\u306e2\u540d\u4f53\u5236\u3067\u5b66\u7fd2\u3092\u30b5\u30dd\u30fc\u30c8\u3002\u67085~10\u4e07\u5186\u306e\u53ce\u5165\u7372\u5f97\u3092\u898b\u636e\u3048\u3001\u30b9\u30ad\u30eb\u306e\u7fd2\u5f97\u304b\u3089\u4ed5\u4e8b\u306e\u53d6\u308a\u65b9\u30fb\u9032\u3081\u65b9\u307e\u3067\u4e00\u8cab\u3057\u3066\u5b66\u3079\u307e\u3059\u3002<\/p>\n\n<p>\u53d7\u8b1b\u6599\u304c<strong><span class=\"swl-marker mark_yellow\">\u6700\u592780%OFF\u306b\u306a\u308b\u300c\u7d66\u4ed8\u91d1\u30b3\u30fc\u30b9\u300d<\/span><\/strong>\u3082\u63d0\u4f9b\u4e2d\u3002\u672a\u7d4c\u9a13\u304b\u3089\u526f\u696d\u3067\u53ce\u5165\u3092\u5897\u3084\u3057\u305f\u3044\u4eba\u306f\u3001\u305c\u3072\u4e00\u5ea6\u304a\u8a66\u3057\u304f\u3060\u3055\u3044\u3002<\/p>\n\n<p class=\"has-text-align-center u-mb-ctrl u-mb-0\">\uff3c \u30aa\u30f3\u30e9\u30a4\u30f3\u3067\u76f8\u8ac7\u53ef\u80fd \uff0f<a href=\"https:\/\/lp.sejuku.net\/lp1_blog_02?cid=pro_howto_normal_pr_Normal_sbid-3286\"><\/a><\/p>\n\n<div class=\"swell-block-button is-style-btn_shiny\" data-id=\"d34d364c\"><a href=\"https:\/\/lp.sejuku.net\/lp1_blog_02\/?cid=lp_text_cta\" class=\"swell-block-button__link\"><span>\u516c\u5f0f\u30b5\u30a4\u30c8\u3067\u8a73\u7d30\u3092\u898b\u308b<\/span><\/a><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\u30a2\u30e9\u30fc\u30c8\u3068\u306f\uff1f<\/h2>\n\n\n\n<p>\u30a2\u30e9\u30fc\u30c8\u3068\u306f\u3001<b>\u4efb\u610f\u306e\u30c6\u30ad\u30b9\u30c8\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u3067\u753b\u9762\u306b\u8868\u793a\u3059\u308b<\/b>\u3053\u3068\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u6b21\u306e\u3088\u3046\u306a\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u3092\u898b\u305f\u3053\u3068\u304c\u3042\u308b\u4eba\u3082\u3044\u308b\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n\n\n\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-44176\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/02\/javascript-alert-img1.jpg\" alt=\"javascript-alert-img1\" width=\"600\" height=\"300\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/02\/javascript-alert-img1.jpg 600w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/02\/javascript-alert-img1-150x75.jpg 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/02\/javascript-alert-img1-300x150.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><div class=\"img-caption\">\u753b\u50cf\uff1a\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30b5\u30f3\u30d7\u30eb<\/div><\/p>\n\n\n\n<p>\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u3078\u4f55\u3089\u304b\u306e\u6ce8\u610f\u559a\u8d77\u3067\u3042\u3063\u305f\u308a\u78ba\u8a8d\u3092\u6c42\u3081\u308b\u3088\u3046\u306a\u76ee\u7684\u3067\u4f7f\u308f\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002\u7279\u6b8a\u306a\u4f7f\u3044\u65b9\u3068\u3057\u3066\u306f\u3001\u7c21\u6613\u7684\u306a\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30c7\u30d0\u30c3\u30b0\u306b\u5229\u7528\u3055\u308c\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">alert\uff08\u30a2\u30e9\u30fc\u30c8\uff09\u306e\u4f7f\u3044\u65b9<\/h2>\n\n\n\n<p>alert()\u30e1\u30bd\u30c3\u30c9\u3068\u306f\u3001\u5148\u307b\u3069\u89e3\u8aac\u3057\u305f\u30a2\u30e9\u30fc\u30c8\u3092\u51fa\u3059\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u3002\u3053\u3053\u304b\u3089\u306f\u3001\u5b9f\u969b\u306balert()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u305f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u624b\u6cd5\u3092\u8a73\u3057\u304f\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">alert()\u306e\u66f8\u304d\u65b9<\/h3>\n\n\n\n<p>\u307e\u305a\u3001alert()\u306e\u57fa\u672c\u7684\u306a\u69cb\u6587\u3092\u5b66\u7fd2\u3057\u3066\u66f8\u304d\u65b9\u3092\u899a\u3048\u307e\u3057\u3087\u3046\uff01\u3068\u3001\u8a00\u3063\u3066\u3082\u5b9f\u306f\u3059\u3054\u304f\u7c21\u5358\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u8a18\u8ff0\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">alert( \u753b\u9762\u306b\u8868\u793a\u3055\u305b\u305f\u3044\u5024 )<\/pre>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u5f15\u6570\u3078\u5024\u3092\u6307\u5b9a\u3059\u308b\u3060\u3051\u3067\u3001\u4efb\u610f\u306e\u5024\u3092\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u8868\u793a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u5024\u306f\u3001\u6587\u5b57\u5217\u3084\u6570\u5024\u306a\u3069<b>\u3055\u307e\u3056\u307e\u306a\u5024\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd<\/b>\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u305f\u3060\u3057\u3001\u8868\u793a\u3055\u308c\u308b\u30dc\u30bf\u30f3\u306a\u3069\u306f\u81ea\u52d5\u7684\u306b\u751f\u6210\u3055\u308c\u3066\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6587\u5b57\u5217\u30fb\u6570\u5024\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u51fa\u529b<\/h3>\n\n\n\n<p>\u307e\u305a\u306f\u4e00\u756a\u57fa\u672c\u3001\u6587\u5b57\u5217\u3092\u51fa\u529b\u3057\u3066\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u8868\u793a\u3055\u305b\u3066\u307f\u307e\u3057\u3087\u3046\uff01\u5148\u307b\u3069\u306e\u69cb\u6587\u306b\u5f53\u3066\u306f\u3081\u308b\u3068\u3001\u6b21\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3067\u8868\u793a\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">alert('\u30a2\u30e9\u30fc\u30c8\u306e\u30e1\u30c3\u30bb\u30fc\u30b8')<\/pre>\n\n\n\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-38918\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re1.jpg\" alt=\"javascript-alert-tutorial-re1\" width=\"600\" height=\"300\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re1.jpg 600w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re1-150x75.jpg 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re1-300x150.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><div class=\"img-caption\">\u753b\u50cf\uff1a\u5b9f\u884c\u7d50\u679c<\/div><\/p>\n\n\n\n<p>alert()\u306e\u5f15\u6570\u3078\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u8868\u793a\u3055\u305b\u305f\u3044\u6587\u5b57\u5217\u3092\u6307\u5b9a\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u306d\u3002\u6570\u5024\u3092\u8868\u793a\u3055\u305b\u305f\u3044\u5834\u5408\u3082\u307e\u3063\u305f\u304f\u540c\u3058\u624b\u9806\u3067\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">alert(123456789);<\/pre>\n\n\n\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-38919\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re2.jpg\" alt=\"javascript-alert-tutorial-re2\" width=\"600\" height=\"300\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re2.jpg 600w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re2-150x75.jpg 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re2-300x150.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><div class=\"img-caption\">\u753b\u50cf\uff1a\u5b9f\u884c\u7d50\u679c<\/div><\/p>\n\n\n\n<p>\u6ce8\u610f\u70b9\u3068\u3057\u3066\u3001<b>\u6587\u5b57\u5217\u306e\u5834\u5408\u306f\u300c&#8221;\u300d\u304b\u300c&#8217;\u300d\u3067\u3001\u5024\u3092\u56f2\u3080\u5fc5\u8981\u304c\u3042\u308b<\/b>\u3068\u3044\u3046\u70b9\u3060\u3051\u5fd8\u308c\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\uff01<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong><span class=\"swl-inline-color has-swl-main-color\">\uff3c\u3000\u73fe\u5f79\u30a8\u30f3\u30b8\u30cb\u30a2\u30681on1\u30ec\u30c3\u30b9\u30f3\u304c\u53ef\u80fd\uff01\uff0f<\/span><\/strong><br>    <a class=\"sc_button2\" href=\"https:\/\/www.sejuku.net\/terakoya\/lp3\/?cid=btn_article_plus\">\u516c\u5f0f\u30b5\u30a4\u30c8\u3067\u8a73\u7d30\u3092\u898b\u308b<\/a>\n    <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5909\u6570\u3092\u4f7f\u3063\u3066\u30e1\u30c3\u30bb\u30fc\u30b8\u51fa\u529b\u3059\u308b\u65b9\u6cd5<\/h3>\n\n\n\n<p>alert\u306b\u306f\u5909\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u3053\u3061\u3089\u306f\u5177\u4f53\u7684\u306a\u30b5\u30f3\u30d7\u30eb\u3092\u307f\u3066\u9802\u3051\u308c\u3070\u5206\u304b\u308a\u3084\u3059\u3044\u304b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">var warn = \"\u5185\u5bb9\u306b\u9593\u9055\u3044\u304c\u306a\u3044\u304b\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\";\nalert(warn);<\/pre>\n\n\n\n<p>\u4e0a\u8a18\u3092\u958b\u767a\u8005\u30c4\u30fc\u30eb\u306e\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u6253\u3061\u8fbc\u3080\u3068\u5909\u6570warn\u306b\u8a2d\u5b9a\u3057\u305f\u6587\u5b57\u5217\u304c\u30a2\u30e9\u30fc\u30c8\u3068\u3057\u3066\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u308b\u304b\u3068\u601d\u3044\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3057\u3066\u3001\u5909\u6570\u3092\u7528\u3044\u3066\u30a2\u30e9\u30fc\u30c8\u8868\u793a\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">alert\uff08\u30a2\u30e9\u30fc\u30c8\uff09\u306e\u30c0\u30a4\u30a2\u30ed\u30b0\u306f\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3067\u304d\u306a\u3044<\/h3>\n\n\n\n<p>alert()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u3044\u308b\u3068\u3001\u3064\u3044\u3064\u3044\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3092\u3057\u305f\u304f\u306a\u308b\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\uff1f\u3088\u304f\u3042\u308b\u8cea\u554f\u3068\u3057\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><div class=\"box_voice\">\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u8868\u793a\u3055\u308c\u308b\u30a2\u30a4\u30b3\u30f3\u306f\u3069\u3046\u3059\u308c\u3070\u5909\u66f4\u3067\u304d\u307e\u3059\u304b\uff1f<br>\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u306e\u30bf\u30a4\u30c8\u30eb\u30c6\u30ad\u30b9\u30c8\u306f\u3069\u3046\u3059\u308c\u3070\u5909\u66f4\u3067\u304d\u307e\u3059\u304b\uff1f<br>\u30dc\u30bf\u30f3\u306e\u30c6\u30ad\u30b9\u30c8\u306f\u3069\u3046\u3059\u308c\u3070\u5909\u66f4\u3067\u304d\u307e\u3059\u304b\uff1f<\/div><\/p>\n\n\n\n<p>\u7d50\u8ad6\u304b\u3089\u7533\u3057\u307e\u3059\u3068\u3001\u3053\u308c\u3089\u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u306f\u3059\u3079\u3066\u51fa\u6765\u307e\u305b\u3093\uff01\u306a\u305c\u306a\u3089\u3001alert()\u30e1\u30bd\u30c3\u30c9\u306f\u3042\u304f\u307e\u3067\u3082\u7279\u5b9a\u306e\u5024\uff08\u30e1\u30c3\u30bb\u30fc\u30b8\uff09\u3092\u30e6\u30fc\u30b6\u30fc\u306b\u78ba\u8a8d\u3057\u3066\u3082\u3089\u3046\u7528\u9014\u306b\u7279\u5316\u3057\u3066\u3044\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3082\u3057\u3001\u305d\u308c\u3067\u3082\u81ea\u7531\u306b\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3057\u305f\u3044\uff01\u3068\u8003\u3048\u308b\u306a\u3089\u3070HTML\u3001CSS\u3001JavaScript\u3067\u72ec\u81ea\u306b\u30c0\u30a4\u30a2\u30ed\u30b0\u3092\u4f5c\u6210\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u72ec\u81ea\u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306f\u3001\u6b21\u306e\u8a18\u4e8b\u3067\u30bc\u30ed\u304b\u3089\u4f5c\u308b\u65b9\u6cd5\u3092\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u308b\u306e\u3067\u305c\u3072\u53c2\u8003\u306b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n\n\n\n\n\n\n<p class=\"has-text-align-center\"><strong><span class=\"swl-inline-color has-swl-main-color\">\uff3c\u3000\u73fe\u5f79\u30a8\u30f3\u30b8\u30cb\u30a2\u30681on1\u30ec\u30c3\u30b9\u30f3\u304c\u53ef\u80fd\uff01\uff0f<\/span><\/strong><br>    <a class=\"sc_button2\" href=\"https:\/\/www.sejuku.net\/terakoya\/lp3\/?cid=btn_article_plus\">\u516c\u5f0f\u30b5\u30a4\u30c8\u3067\u8a73\u7d30\u3092\u898b\u308b<\/a>\n    <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">alert\uff08\u30a2\u30e9\u30fc\u30c8\uff09\u306e\u6d3b\u7528\u4e8b\u4f8b<\/h2>\n\n\n\n<p>alert()\u306e\u51fa\u3057\u65b9\u3084\u7279\u6027\u304c\u308f\u304b\u3063\u305f\u3068\u3053\u308d\u3067\u3001\u6587\u5b57\u3084\u6570\u5024\u306a\u3069\u8272\u3005\u306a\u4e2d\u8eab\u3092\u5165\u308c\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8a08\u7b97\u7d50\u679c\u3092\u51fa\u529b<\/h3>\n\n\n\n<p>alert()\u306e\u5f15\u6570\u306f\u8a08\u7b97\u5f0f\u3092\u633f\u5165\u3059\u308b\u3053\u3068\u3067\u3001<b>\u81ea\u52d5\u7684\u306b\u8a08\u7b97\u3055\u308c\u305f\u7d50\u679c\u3092\u8868\u793a\u3059\u308b\u6a5f\u80fd<\/b>\u304c\u3042\u308a\u307e\u3059\u3002\u6b21\u306e\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">alert(10 + (10 * 2) );<\/pre>\n\n\n\n<p>[\u5b9f\u884c\u7d50\u679c]<br><img decoding=\"async\" class=\"alignnone size-full wp-image-38920\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re3.jpg\" alt=\"javascript-alert-tutorial-re3\" width=\"600\" height=\"300\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re3.jpg 600w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re3-150x75.jpg 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re3-300x150.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/p>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\u4e00\u822c\u7684\u306a\u8a08\u7b97\u5f0f\u3092\u5f15\u6570\u306b\u6307\u5b9a\u3059\u308b\u3060\u3051\u3067\u8a08\u7b97\u7d50\u679c\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u307e\u305f\u3001\u8a08\u7b97\u7d50\u679c\u306b\u5c0f\u6570\u70b9\u304c\u542b\u307e\u308c\u308b\u5834\u5408\u3082\u554f\u984c\u306a\u304f\u8868\u793a\u3055\u308c\u307e\u3059\uff01<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">alert(10 *20 \/ 3 );<\/pre>\n\n\n\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-38921\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re4.jpg\" alt=\"javascript-alert-tutorial-re4\" width=\"600\" height=\"300\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re4.jpg 600w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re4-150x75.jpg 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re4-300x150.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><div class=\"img-caption\">\u753b\u50cf\uff1a\u5b9f\u884c\u7d50\u679c<\/div><\/p>\n\n\n\n<p>\u610f\u56f3\u7684\u306b\u8a08\u7b97\u7d50\u679c\u3092\u30e6\u30fc\u30b6\u30fc\u306b\u898b\u305b\u305f\u3044\u5834\u5408\u306b\u306f\u3001alert()\u306f\u52b9\u679c\u7684\u306a\u65b9\u6cd5\u3068\u8a00\u3048\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6587\u5b57\u5217\u3092\u9023\u7d50\u3057\u3066\u51fa\u529b<\/h3>\n\n\n\n<p>\u6b21\u306b\u3001<b>\u6587\u5b57\u5217\u3092\u9023\u7d50\u3057\u3066\u8868\u793a\u3059\u308b\u65b9\u6cd5<\/b>\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01\u5358\u7d14\u306a\u6587\u5b57\u5217\u3092\u9023\u7d50\u3059\u308b\u5834\u5408\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">alert('\u4eca\u65e5\u306f' + '\u826f\u3044\u5929\u6c17' + '\u3067\u3059\u306d');<\/pre>\n\n\n\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-38922\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re5.jpg\" alt=\"javascript-alert-tutorial-re5\" width=\"600\" height=\"300\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re5.jpg 600w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re5-150x75.jpg 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re5-300x150.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><div class=\"img-caption\">\u753b\u50cf\uff1a\u5b9f\u884c\u7d50\u679c<\/div><\/p>\n\n\n\n<p>\u6587\u5b57\u5217\u540c\u58eb\u3092\u300c+\u300d\u3067\u7e4b\u3052\u3066\u3044\u304f\u3060\u3051\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\u306d\u3002\u307e\u305f\u3001\u5909\u6570\u3084\u6570\u5024\u306a\u3069\u3092\u6df7\u5728\u3055\u305b\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\uff01\u6b21\u306e\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">var num1 = 15;\nvar num2 = 2;\n\nvar str = '\u8a08\u7b97\u5f0f';\n\nalert(str + '\uff0815\u27152\uff09\u306e\u7b54\u3048\uff1a'+ num1 * num2);<\/pre>\n\n\n\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-38923\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re6.jpg\" alt=\"javascript-alert-tutorial-re6\" width=\"600\" height=\"300\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re6.jpg 600w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re6-150x75.jpg 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/12\/javascript-alert-tutorial-re6-300x150.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><div class=\"img-caption\">\u753b\u50cf\uff1a\u5b9f\u884c\u7d50\u679c<\/div><\/p>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u6570\u5024\u3084\u6587\u5b57\u5217\u3092\u5909\u6570\u306b\u683c\u7d0d\u3057\u3066\u3044\u307e\u3059\u3002\u305d\u308c\u305e\u308c\u306e\u5909\u6570\u3092alert()\u306e\u5f15\u6570\u306b\u5f53\u3066\u306f\u3081\u308b\u3053\u3068\u3067\u3001\u4e0a\u8a18\u306e\u3088\u3046\u306a\u7d50\u679c\u306b\u306a\u308b\u308f\u3051\u3067\u3059\uff01\u5b9f\u969b\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3044\u3066\u3082\u3001\u5909\u6570\u3084\u6587\u5b57\u5217\u306e\u9023\u7d50\u306f\u3088\u304f\u4f7f\u3046\u624b\u6cd5\u306a\u306e\u3067\u6163\u308c\u3066\u304a\u304f\u3088\u3046\u306b\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>JavaScript\u306e\u6587\u5b57\u5217\u306e\u9023\u7d50\u306b\u3064\u3044\u3066\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u6d3b\u7528\u4e8b\u4f8b\u3092\u4e0b\u8a18\u306e\u8a18\u4e8b\u306b\u8a73\u3057\u304f\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002\u3053\u3061\u3089\u3082\u305c\u3072\u53c2\u8003\u306b\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n\n\n            <a href=\"https:\/\/www.sejuku.net\/blog\/21149\" class=\"blog-card-anchor\">\n                <div class=\"blog-card\">\n                <div class=\"blog-card-content\">\n                    <div class=\"blog-card-thumbnail\">\n                    <img decoding=\"async\" class=\"blog-card-thumbnail-img\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2017\/04\/JS-21149-150x85.jpg\">\n                    <\/div>\n                    <div class=\"blog-card-title-wrap\">\n                    <div class=\"blog-card-title\">\u3010JavaScript\u5165\u9580\u3011join\u3084+\u6f14\u7b97\u5b50\u3067\u914d\u5217\u3084\u6587\u5b57\u5217\u3092\u9023\u7d50\u30fb\u7d50\u5408\u3059\u308b<\/div>\n                    <div class=\"blog-card-update-date\">\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n                    <\/div>\n                <\/div>\n                <\/div>\n            <\/a>\n            \n\n\n\n<p class=\"has-text-align-center\"><strong><span class=\"swl-inline-color has-swl-main-color\">\uff3c\u3000\u73fe\u5f79\u30a8\u30f3\u30b8\u30cb\u30a2\u30681on1\u30ec\u30c3\u30b9\u30f3\u304c\u53ef\u80fd\uff01\uff0f<\/span><\/strong><br>    <a class=\"sc_button2\" href=\"https:\/\/www.sejuku.net\/terakoya\/lp3\/?cid=btn_article_plus\">\u516c\u5f0f\u30b5\u30a4\u30c8\u3067\u8a73\u7d30\u3092\u898b\u308b<\/a>\n    <\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6539\u884c\u3092\u542b\u3080\u6587\u5b57\u5217\u3092\u51fa\u529b\u3059\u308b\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u5148\u307b\u3069\u306e\u4f8b\u3067\u306f\uff11\u884c\u3067\u8868\u793a\u3057\u3066\u3044\u307e\u3057\u305f\u304c\u3001\u5b9f\u969b\u306b\u306f\u8907\u6570\u884c\u306b\u308f\u305f\u3063\u3066\u5185\u5bb9\u3092\u8a18\u8ff0\u3057\u305f\u3044\u3053\u3068\u304c\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u3002\u305d\u306e\u5834\u5408\u306f\u3001\u6539\u884c\u3092\u5165\u308c\u308b\u7b87\u6240\u306b\u300cn\u300d\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3067\u601d\u3044\u901a\u308a\u306e\u6539\u884c\u3092\u5165\u308c\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">alert(\u201c \u5165\u529b\u30a8\u30e9\u30fc\u3002n\u3042\u306a\u305f\u306e\u5165\u529b\u3057\u305f\u5185\u5bb9\u306b\u8aa4\u308a\u304c\u3042\u308a\u307e\u3059\u3002n\u96fb\u8a71\u756a\u53f7\u306e\u7b87\u6240\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u201d);<\/pre>\n\n\n\n<p>\u4e0a\u8a18\u306e\u30b5\u30f3\u30d7\u30eb\u3082\u305c\u3072\u3001\u304a\u624b\u5143\u306e\u74b0\u5883\u3067\u5b9f\u969b\u306b\u52d5\u304d\u3092\u78ba\u8a8d\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u30c0\u30a4\u30a2\u30ed\u30b0\u3067\u6539\u884c\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306f\u4e0b\u8a18\u306e\u8a18\u4e8b\u3067\u3082\u8a73\u3057\u304f\u89e3\u8aac\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u305c\u3072\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n            <a href=\"https:\/\/www.sejuku.net\/blog\/55631\" class=\"blog-card-anchor\">\n                <div class=\"blog-card\">\n                <div class=\"blog-card-content\">\n                    <div class=\"blog-card-thumbnail\">\n                    <img decoding=\"async\" class=\"blog-card-thumbnail-img\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/05\/image-34-150x86.jpg\">\n                    <\/div>\n                    <div class=\"blog-card-title-wrap\">\n                    <div class=\"blog-card-title\">\u3010JavaScript\u5165\u9580\u3011\u6587\u5b57\u5217\u3092\u6539\u884c\u3059\u308b\u65b9\u6cd5(\u6539\u884c\u30b3\u30fc\u30c9\/\u300c\\n\u300d\/\u7f6e\u63db)<\/div>\n                    <div class=\"blog-card-update-date\">\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n                    <\/div>\n                <\/div>\n                <\/div>\n            <\/a>\n            \n\n\n\n<h3 class=\"wp-block-heading\">\u914d\u5217\u30fb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u51fa\u529b<\/h3>\n\n\n\n<p>\u4eca\u5ea6\u306f\u3001\u914d\u5217\u3084\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5024\u3092alert()\u3067\u51fa\u529b\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01\u57fa\u672c\u7684\u306b\u306f\u3053\u308c\u307e\u3067\u5b66\u3093\u3060\u5185\u5bb9\u3068\u540c\u3058\u3067\u3059\u304c\u3001\u914d\u5217\u3084\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u8907\u6570\u306e\u30c7\u30fc\u30bf\u3092\u4fdd\u6301\u3057\u3066\u3044\u308b\u306e\u3067\u30eb\u30fc\u30d7\u51e6\u7406\u306e\u4e2d\u3067alert()\u3092\u5b9f\u884c\u3059\u308b\u306e\u304c\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u6b21\u306e\u30b5\u30f3\u30d7\u30eb\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">var array = ['\u30ea\u30f3\u30b4', '\u30d0\u30ca\u30ca', '\u30e1\u30ed\u30f3', '\u30a4\u30c1\u30b4'];\n  \narray.forEach(function(data) {\n    alert(data);\n});\n<\/pre>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u914d\u5217\u3092forEach()\u3067\u30eb\u30fc\u30d7\u51e6\u7406\u3055\u305b\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u306d\u3002\u3053\u306e\u30eb\u30fc\u30d7\u306e\u4e2d\u3067\u3042\u308c\u3070\u3001\u914d\u5217\u306e\u5024\u3092\u53d6\u5f97\u3057\u3084\u3059\u3044\u306e\u3067alert()\u306b\u305d\u306e\u307e\u307e\u5909\u6570\u3092\u8a2d\u5b9a\u3059\u308c\u3070\u51fa\u529b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u540c\u3058\u3088\u3046\u306b\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3082\u4f8b\u3048\u3070for-in\u6587\u306a\u3069\u3092\u4f7f\u3063\u3066\u51fa\u529b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">var obj = {name: '\u592a\u90ce', age: 30, area: 'Tokyo'};\n  \nfor(var item in obj) {\n    alert(obj[item]);\n}\n<\/pre>\n\n\n\n<p>for-in\u6587\u306e\u30eb\u30fc\u30d7\u51e6\u7406\u3067\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u540d\u3092\u53d6\u5f97\u3067\u304d\u308b\u306e\u3067\u305d\u308c\u3092\u5229\u7528\u3057\u3066\u5024\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong><span class=\"swl-inline-color has-swl-main-color\">\uff3c\u3000\u73fe\u5f79\u30a8\u30f3\u30b8\u30cb\u30a2\u30681on1\u30ec\u30c3\u30b9\u30f3\u304c\u53ef\u80fd\uff01\uff0f<\/span><\/strong><br>    <a class=\"sc_button2\" href=\"https:\/\/www.sejuku.net\/terakoya\/lp3\/?cid=btn_article_plus\">\u516c\u5f0f\u30b5\u30a4\u30c8\u3067\u8a73\u7d30\u3092\u898b\u308b<\/a>\n    <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u521d\u5fc3\u8005\u306f\u5b66\u7fd2\u30b5\u30a4\u30c8\u3092\u767b\u9332\u3059\u308b\u306e\u304c\u304a\u3059\u3059\u3081<\/h2>\n\n\n\n<p>\u521d\u5fc3\u8005\u304c\u52b9\u7387\u7684\u306b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u5b66\u7fd2\u3059\u308b\u306b\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u5b66\u7fd2\u30b5\u30a4\u30c8\u3092\u4f7f\u3046\u306e\u304c\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u7121\u6599\u3067\u4f7f\u7528\u3067\u304d\u308b\u3082\u306e\u3067\u3042\u308c\u3070\u3001\u4f59\u8a08\u306a\u8cbb\u7528\u3092\u304b\u3051\u308b\u3053\u3068\u306a\u304f\u52b9\u7387\u7684\u306b\u52c9\u5f37\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u4ed6\u306e\u4eba\u3088\u308a\u3082\u65e9\u304f\u30b9\u30ad\u30eb\u30a2\u30c3\u30d7\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u7121\u6599\u3067\u73fe\u5834\u3067\u6d3b\u8e8d\u3057\u3066\u3044\u308b\u30d7\u30ed\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u306b\u76f8\u8ac7\u304c\u3067\u304d\u308b\u5b66\u7fd2\u30b5\u30a4\u30c8\u306a\u3069\u3082\u3042\u308b\u305f\u3081\u3001\u6c17\u306b\u306a\u3063\u305f\u65b9\u306f\u305c\u3072\u5229\u7528\u3057\u3066\u307f\u308b\u3068\u3088\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong><span class=\"swl-inline-color has-swl-main-color\">\uff3c\u3000\u73fe\u5f79\u30a8\u30f3\u30b8\u30cb\u30a2\u30681on1\u30ec\u30c3\u30b9\u30f3\u304c\u53ef\u80fd\uff01\uff0f<\/span><\/strong><br>    <a class=\"sc_button2\" href=\"https:\/\/www.sejuku.net\/terakoya\/lp3\/?cid=btn_article_plus\">\u4f8d\u30c6\u30e9\u30b3\u30e4\u306e\u8a73\u7d30\u3092\u898b\u308b<\/a>\n    <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">alert\uff08\u30a2\u30e9\u30fc\u30c8\uff09\u3092\u3082\u3063\u3068\u6d3b\u7528\u3057\u3088\u3046<\/h2>\n\n\n\n<p>\u3053\u308c\u307e\u3067\u306falert()\u3092\u76f4\u63a5\u5b9f\u884c\u3057\u3066\u3044\u307e\u3057\u305f\u304c\u3001\u5b9f\u969b\u306b\u306f<b>\u4f55\u3089\u304b\u306e\u30a2\u30af\u30b7\u30e7\u30f3\u306b\u3088\u3063\u3066\u5b9f\u884c\u3059\u308b<\/b>\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u30dc\u30bf\u30f3\u8981\u7d20\u3084\u30ea\u30f3\u30af\u3092\u30e6\u30fc\u30b6\u30fc\u304c\u30af\u30ea\u30c3\u30af\u3057\u305f\u6642\u306b\u8868\u793a\u3055\u305b\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p>\u305d\u3093\u306a\u30a2\u30af\u30b7\u30e7\u30f3\u3068\u306e\u7d44\u307f\u5408\u308f\u305b\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\uff01<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30af\u30ea\u30c3\u30af\u3092\u3057\u305f\u3089\u30a2\u30e9\u30fc\u30c8\u3092\u51fa\u3059<\/h3>\n\n\n\n<p>\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u6642\u306b\u30a2\u30e9\u30fc\u30c8\u3092\u51fa\u3059\u5834\u5408\u3001\u5c5e\u6027\u306bonclick\u3092\u4ed8\u4e0e\u3057\u3066JavaScript\u306e\u95a2\u6570\u3092\u5b9f\u884c\u3059\u308b\u969b\u306balert()\u3092\u5b9f\u884c\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u6b21\u306e\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">&lt;body&gt;\n&lt;button onclick=\"clickEvent()\"&gt;\u30dc\u30bf\u30f3&lt;\/button&gt;\n\n&lt;script&gt;\n    function clickEvent() {\n        alert('\u30af\u30ea\u30c3\u30af\u3055\u308c\u307e\u3057\u305f');\n    }\n&lt;\/script&gt;\n&lt;\/body&gt;<\/pre>\n\n\n\n<p>\u4eca\u56de\u306e\u5834\u5408\u300cclickEvent()\u300d\u3068\u3044\u3046\u95a2\u6570\u3092\u4f5c\u6210\u3057\u3001alert()\u3092\u5b9f\u884c\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002HTML\u5074\u3067\u306f\u3001button\u8981\u7d20\u306bonclick\u5c5e\u6027\u3092\u4ed8\u4e0e\u3057\u3066JavaScript\u306e\u95a2\u6570\u3092\u6307\u5b9a\u3057\u3001\u30af\u30ea\u30c3\u30af\u6642\u306b\u95a2\u6570\u304c\u52d5\u304f\u4ed5\u69d8\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u305d\u306e\u305f\u3081\u3001\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u3067alert\u304c\u8868\u793a\u3055\u308c\u308b\u308f\u3051\u3067\u3059\u3002\u307e\u305f\u3001\u30ea\u30f3\u30af\u8981\u7d20\u306e\u5834\u5408\u3082\u540c\u3058\u8003\u3048\u65b9\u3067\u4f5c\u308b\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\uff01<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">&lt;body&gt;\n&lt;a href=\"#\" onclick=\"clickEvent()\"&gt;\u30ea\u30f3\u30af&lt;\/a&gt;\n\n&lt;script&gt;\n    function clickEvent() {\n        alert('\u30af\u30ea\u30c3\u30af\u3055\u308c\u307e\u3057\u305f');\n    }\n&lt;\/script&gt;\n&lt;\/body&gt;<\/pre>\n\n\n\n<p>\u5148\u307b\u3069\u3068\u540c\u3058\u3067\u3001a\u8981\u7d20\u306bonclick\u5c5e\u6027\u3092\u4ed8\u4e0e\u3057\u3066\u95a2\u6570\u3092\u6307\u5b9a\u3059\u308b\u3060\u3051\u3067\u3059\u3002JavaScript\u306e\u95a2\u6570\u306f\u5148\u307b\u3069\u3068\u307e\u3063\u305f\u304f\u540c\u3058\u3067\u3059\u306d\u3002\u5fdc\u7528\u6b21\u7b2c\u3067\u306f\u3001\u30d5\u30a9\u30fc\u30e0\u8981\u7d20\u306e\u9001\u4fe1\u30dc\u30bf\u30f3\u306bonclick\u3067\u95a2\u6570\u3092\u6307\u5b9a\u3057\u3066alert\u3092\u78ba\u8a8d\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3088\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30de\u30a6\u30b9\u30aa\u30fc\u30d0\u30fc\u3057\u305f\u3089\u30a2\u30e9\u30fc\u30c8\u3092\u51fa\u3059<\/h3>\n\n\n\n<p>\u30af\u30ea\u30c3\u30af\u3060\u3051\u3067\u306a\u304f\u3001<b>\u30de\u30a6\u30b9\u30aa\u30fc\u30d0\u30fc\u3057\u305f\u6642\u306b\u30a2\u30e9\u30fc\u30c8\u3092\u51fa\u3059<\/b>\u3068\u3044\u3046\u4ed5\u69d8\u306b\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002\u5148\u307b\u3069\u4f7f\u3063\u305fonclick\u5c5e\u6027\u306e\u4ee3\u308f\u308a\u306b\u3001onMouseOver\u5c5e\u6027\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">&lt;body&gt;\n&lt;button onmouseover=\"mouseoverEvent()\"&gt;\u30dc\u30bf\u30f3&lt;\/button&gt;\n\n&lt;script&gt;\n    function mouseoverEvent() {\n        alert('\u30ab\u30fc\u30bd\u30eb\u304c\u4e57\u308a\u307e\u3057\u305f');\n    }\n&lt;\/script&gt;\n&lt;\/body&gt;<\/pre>\n\n\n\n<p>\u30af\u30ea\u30c3\u30af\u3068\u540c\u3058\u3088\u3046\u306b\u30e1\u30bd\u30c3\u30c9\u3092\u4f5c\u6210\u3057\u3001HTML\u306b\u5c5e\u6027\u3092\u4ed8\u4e0e\u3059\u308b\u3060\u3051\u3067\u3059\u3002\u30b2\u30fc\u30e0\u306a\u3069\u3092\u4f5c\u308b\u6642\u306b\u3061\u3087\u3063\u3068\u4f7f\u3048\u305d\u3046\u306a\u30c6\u30af\u30cb\u30c3\u30af\u3067\u3059\u306d\u3002<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong><span class=\"swl-inline-color has-swl-main-color\">\uff3c\u3000\u73fe\u5f79\u30a8\u30f3\u30b8\u30cb\u30a2\u30681on1\u30ec\u30c3\u30b9\u30f3\u304c\u53ef\u80fd\uff01\uff0f<\/span><\/strong><br>    <a class=\"sc_button2\" href=\"https:\/\/www.sejuku.net\/terakoya\/lp3\/?cid=btn_article_plus\">\u516c\u5f0f\u30b5\u30a4\u30c8\u3067\u8a73\u7d30\u3092\u898b\u308b<\/a>\n    <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">alert\uff08\u30a2\u30e9\u30fc\u30c8\uff09\u3092\u4f7f\u3063\u3066\u30c7\u30d0\u30c3\u30b0\u3057\u3066\u307f\u3088\u3046<\/h2>\n\n\n\n<p>alert()\u306e\u5177\u4f53\u7684\u306a\u4f7f\u7528\u4f8b\u3068\u3057\u3066\u3001\u30c7\u30d0\u30c3\u30b0\u306b\u4f7f\u7528\u3059\u308b\u3068\u3044\u3046\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002\u30c7\u30d0\u30c3\u30b0\u3068\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u6b63\u3057\u304f\u52d5\u4f5c\u3057\u3066\u3044\u308b\u304b\uff1f\u307e\u305f\u306f\u539f\u56e0\u4e0d\u660e\u306e\u30a8\u30e9\u30fc\u3092\u5206\u6790\u30fb\u89e3\u6d88\u3059\u308b\u305f\u3081\u306e\u884c\u70ba\u306e\u3053\u3068\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u306a\u305calert()\u3067\u30c7\u30d0\u30c3\u30b0\u3092\u3059\u308b\u306e\u304b\u3001\u3069\u306e\u3088\u3046\u306b\u884c\u306a\u3046\u306e\u304b\u3092\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">alert()\u3067\u30c7\u30d0\u30c3\u30b0\u3092\u884c\u3046\u7406\u7531<\/h3>\n\n\n\n<p>\u307e\u305a\u306f\u3001alert()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u305f\u30c7\u30d0\u30c3\u30b0\u306e\u7279\u5fb4\u3092\u78ba\u8a8d\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002\u4e00\u822c\u7684\u306b\u30c7\u30d0\u30c3\u30b0\u3067\u3088\u304f\u4f7f\u308f\u308c\u308b\u306e\u306fconsole.log()\u3068\u3044\u3046\u3001\u30d6\u30e9\u30a6\u30b6\u306e\u958b\u767a\u8005\u30c4\u30fc\u30eb\u306b\u3042\u308b\u30b3\u30f3\u30bd\u30fc\u30eb\u30ed\u30b0\u3092\u6d3b\u7528\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n<p>console.log()\u3092\u4f7f\u3048\u3070\u5927\u62b5\u306e\u30b1\u30fc\u30b9\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u308f\u3051\u3067\u3059\u304c\u3001\u521d\u5b66\u8005\u306e\u5834\u5408\u306falert()\u3067\u30c7\u30d0\u30c3\u30b0\u3092\u3059\u308b\u306e\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002\u306a\u305c\u306a\u3089\u3001alert()\u304c\u5b9f\u884c\u3055\u308c\u308b\u3068\u3001\u305d\u306e\u6642\u70b9\u3067\u51e6\u7406\u304c\u4e00\u6642\u505c\u6b62\u3055\u308c\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n\n\n\n<p>alert()\u306f\u5b9f\u884c\u3055\u308c\u308b\u3068\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u304c\u8868\u793a\u3055\u308c\u3066\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u30b9\u30c8\u30c3\u30d7\u3057\u307e\u3059\u3088\u306d\uff1f\u9ad8\u901f\u306b\u51e6\u7406\u304c\u884c\u308f\u308c\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u9014\u4e2d\u3067\u6b62\u3081\u308b\u3053\u3068\u3067\u3001\u4eca\u306e\u72b6\u614b\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u7c21\u5358\u306a\u65b9\u6cd5\u3068\u3057\u3066\u5229\u7528\u3067\u304d\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">alert()\u3092\u4f7f\u3063\u305f\u30c7\u30d0\u30c3\u30b0\u306e\u65b9\u6cd5<\/h3>\n\n\n\n<p>\u305d\u308c\u3067\u306f\u3001\u5b9f\u969b\u306balert()\u3092\u4f7f\u3063\u305f\u30c7\u30d0\u30c3\u30b0\u3092\u3084\u3063\u3066\u307f\u307e\u3057\u3087\u3046\uff01\u4f8b\u3048\u3070\u3001for\u6587\u3092\u4f7f\u3063\u3066\u7e70\u308a\u8fd4\u3057\u8a08\u7b97\u51e6\u7406\u3092\u3057\u305f\u5834\u5408\u306b\u3001\u305d\u306e\u4e2d\u8eab\u304c\u3069\u306e\u3088\u3046\u306b\u5909\u5316\u3057\u3066\u3044\u308b\u306e\u304b\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u6b21\u306e\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">for(var i=0; i&lt;5; i++) {\n \n    var num = i * 2;\n\n    alert( num );\n \n}<\/pre>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001for\u6587\u3092\u4f7f\u3063\u3066\u7c21\u5358\u306a\u30eb\u30fc\u30d7\u51e6\u7406\u3092\u8a18\u8ff0\u3057\u3066\u3044\u307e\u3059\u3002for\u6587\u306e\u521d\u671f\u5024\u300ci\u300d\u306b2\u3092\u639b\u3051\u3066\u5076\u6570\u3092\u4f5c\u308a\u3001\u305d\u306e\u5024\u3092\u300cnum\u300d\u306b\u4ee3\u5165\u3057\u3066\u3044\u307e\u3059\u3088\u306d\u3002\u305d\u306e\u3059\u3050\u3042\u3068\u306balert()\u3092\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3067\u30011\u56de\u306e\u7e70\u308a\u8fd4\u3057\u51e6\u7406\u306e\u300cnum\u300d\u306e\u4e2d\u8eab\u3092alert()\u3067\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u308b\u308f\u3051\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u305f\u3060\u3057\u3001\u3053\u308c\u306f\u3042\u304f\u307e\u3067\u5b66\u7fd2\u7528\u306a\u306e\u3067\u3001\u5927\u304d\u306a\u30eb\u30fc\u30d7\u51e6\u7406\u3067\u5229\u7528\u3059\u308b\u3068\u6bce\u56de\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u304c\u8868\u793a\u3055\u308c\u308b\u306e\u3067\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002\u305d\u306e\u3088\u3046\u306a\u5834\u5408\u306f\u3001console.log()\u3092\u4f7f\u3046\u65b9\u304c\u52b9\u679c\u7684\u3067\u3057\u3087\u3046\u3002console.log()\u306b\u3064\u3044\u3066\u3082\u3063\u3068\u77e5\u308a\u305f\u3044\u65b9\u306f\u3001\u4e0b\u8a18\u306e\u8a18\u4e8b\u3082\u4f75\u305b\u3066\u8aad\u3093\u3067\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n            <a href=\"https:\/\/www.sejuku.net\/blog\/27205\" class=\"blog-card-anchor\">\n                <div class=\"blog-card\">\n                <div class=\"blog-card-content\">\n                    <div class=\"blog-card-thumbnail\">\n                    <img decoding=\"async\" class=\"blog-card-thumbnail-img\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/07\/js_eye-150x86.jpg\">\n                    <\/div>\n                    <div class=\"blog-card-title-wrap\">\n                    <div class=\"blog-card-title\">\u30c7\u30d0\u30c3\u30b0\u306b\u5927\u6d3b\u8e8d! JavaScript\u306econsole.log\u3067\u5024\u3092\u8868\u793a\u3057\u3088\u3046<\/div>\n                    <div class=\"blog-card-update-date\">\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n                    <\/div>\n                <\/div>\n                <\/div>\n            <\/a>\n            \n\n\n\n<p class=\"has-text-align-center\"><strong><span class=\"swl-inline-color has-swl-main-color\">\uff3c\u3000\u73fe\u5f79\u30a8\u30f3\u30b8\u30cb\u30a2\u30681on1\u30ec\u30c3\u30b9\u30f3\u304c\u53ef\u80fd\uff01\uff0f<\/span><\/strong><br>    <a class=\"sc_button2\" href=\"https:\/\/www.sejuku.net\/terakoya\/lp3\/?cid=btn_article_plus\">\u516c\u5f0f\u30b5\u30a4\u30c8\u3067\u8a73\u7d30\u3092\u898b\u308b<\/a>\n    <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">alert\uff08\u30a2\u30e9\u30fc\u30c8\uff09\u306e\u985e\u4f3c\u30e1\u30bd\u30c3\u30c9<\/h2>\n\n\n\n<p>\u3053\u3053\u304b\u3089\u306f\u3001alert()\u306e\u985e\u4f3c\u30e1\u30bd\u30c3\u30c9\u306b\u3064\u3044\u3066\u3082\u89e6\u308c\u3066\u304a\u304d\u307e\u3057\u3087\u3046\uff01alert()\u306f\u30e6\u30fc\u30b6\u30fc\u306b\u78ba\u8a8d\u3092\u6c42\u3081\u308b\u3060\u3051\u3067\u3057\u305f\u304c\u3001\u30e6\u30fc\u30b6\u30fc\u304b\u3089\u306e\u300cYes\u300d\u300cNo\u300d\u306b\u3088\u308b\u8fd4\u7b54\u3067\u6761\u4ef6\u5206\u5c90\u3057\u305f\u308a\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4e00\u822c\u7684\u306b\u306f\u3001confirm()\u3084prompt()\u30e1\u30bd\u30c3\u30c9\u304c\u3088\u304f\u4f7f\u308f\u308c\u308b\u306e\u3067\u305d\u308c\u305e\u308c\u306e\u8a73\u3057\u3044\u4f7f\u3044\u65b9\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">confirm():\u300cYes\u300d\u300cNo\u300d\u3067\u5206\u5c90<\/h3>\n\n\n\n<p>\u307e\u305a\u306f\u3001confirm()\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u3044\u65b9\u304b\u3089\u5b66\u7fd2\u3092\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002confirm()\u306falert()\u3068\u9055\u3063\u3066\u3001<b>\u300cOK\uff08Yes\uff09\u300d\u300c\u30ad\u30e3\u30f3\u30bb\u30eb\uff08No\uff09\u300d\u30dc\u30bf\u30f3\u304c\u8868\u793a\u3055\u308c\u308b\u30e1\u30bd\u30c3\u30c9<\/b>\u3067\u3059\u3002<\/p>\n\n\n\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-44177\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/02\/javascript-alert-img2.jpg\" alt=\"javascript-alert-img2\" width=\"600\" height=\"300\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/02\/javascript-alert-img2.jpg 600w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/02\/javascript-alert-img2-150x75.jpg 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/02\/javascript-alert-img2-300x150.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><div class=\"img-caption\">\u753b\u50cf\uff1a\u30a2\u30e9\u30fc\u30c8\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30b5\u30f3\u30d7\u30eb<\/div><\/p>\n\n\n\n<p>OK\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068true\u3001\u30ad\u30e3\u30f3\u30bb\u30eb\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068false\u304c\u8fd4\u308a\u5024\u3068\u3057\u3066\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u4ed5\u7d44\u307f\u3092\u5229\u7528\u3059\u308c\u3070\u3001\u6b21\u306e\u3088\u3046\u306a\u6761\u4ef6\u5206\u5c90\u304c\u8a18\u8ff0\u3067\u304d\u307e\u3059\uff01<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">var result = confirm('\u30ed\u30b0\u30a4\u30f3\u3057\u307e\u3059\u304b\uff1f');\n\nif( result ) {\n\n    console.log('\u30ed\u30b0\u30a4\u30f3\u3057\u307e\u3057\u305f');\n\n}\nelse {\n\n    console.log('\u30ed\u30b0\u30a4\u30f3\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f');\n\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001confirm()\u306b\u3088\u3063\u3066\u53d6\u5f97\u3057\u305f\u8fd4\u308a\u5024\u3092\u5909\u6570\u300cresult\u300d\u306b\u4ee3\u5165\u3057\u3066\u307e\u3059\u3088\u306d\uff1f\u3053\u308c\u3092IF\u6587\u306e\u6761\u4ef6\u5f0f\u306b\u5fdc\u7528\u3059\u308b\u3053\u3068\u3067\u3001<b>\u30e6\u30fc\u30b6\u30fc\u306e\u300cYes\u300d\u300cNo\u300d\u306b\u3088\u308b\u53cd\u5fdc\u3092\u53d7\u3051\u53d6\u3063\u3066\u51e6\u7406\u3092\u5206\u5c90\u3067\u304d\u308b<\/b>\u3068\u3044\u3046\u308f\u3051\u3067\u3059\u3002<\/p>\n\n\n\n<p>confirm\u306e\u8a73\u3057\u3044\u4f7f\u3044\u65b9\u306f\u4e0b\u8a18\u306e\u8a18\u4e8b\u3067\u89e3\u8aac\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u305c\u3072\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n\n\n\n<h3 class=\"wp-block-heading\">prompt():\u5165\u529b\u30dc\u30c3\u30af\u30b9\u3092\u51fa\u3059<\/h3>\n\n\n\n<p>\u6b21\u306b\u3001prompt()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u305f\u624b\u6cd5\u3092\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01prompt()\u306f<b>\u6587\u5b57\u5217\u3092\u5165\u529b\u3057\u3066\u3082\u3089\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u30e1\u30bd\u30c3\u30c9<\/b>\u3067\u3059\u3002<\/p>\n\n\n\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-44178\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/02\/javascript-alert-img3.jpg\" alt=\"javascript-alert-img3\" width=\"600\" height=\"300\" srcset=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/02\/javascript-alert-img3.jpg 600w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/02\/javascript-alert-img3-150x75.jpg 150w, https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/02\/javascript-alert-img3-300x150.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><div class=\"img-caption\">\u753b\u50cf\uff1a\u5165\u529b\u30dc\u30c3\u30af\u30b9<\/div><\/p>\n\n\n\n<p>OK\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u5165\u529b\u3055\u308c\u305f\u6587\u5b57\u5217\u304c\u53d6\u5f97\u3067\u304d\u3001\u30ad\u30e3\u30f3\u30bb\u30eb\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068null\u304c\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u4ed5\u7d44\u307f\u3092\u5229\u7528\u3059\u308c\u3070\u3001\u6b21\u306e\u3088\u3046\u306a\u6761\u4ef6\u5206\u5c90\u304c\u5b9f\u73fe\u3067\u304d\u307e\u3059\uff01<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">var result = prompt('\u4e86\u89e3\u3000\u3068\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044');\n\nif( result === '\u4e86\u89e3') {\n    console.log('\u4e86\u89e3\u3068\u5165\u529b\u3055\u308c\u307e\u3057\u305f');\n}\nelse {\n    console.log('\u4e86\u89e3\u3068\u5165\u529b\u3055\u308c\u307e\u305b\u3093\u3067\u3057\u305f');\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u5165\u529b\u3057\u305f\u6587\u5b57\u5217\u3092\u6761\u4ef6\u5f0f\u306b\u5fdc\u7528\u3057\u3001\u6307\u5b9a\u306e\u6587\u5b57\u5217\u3068\u5408\u81f4\u3059\u308b\u304b\u3069\u3046\u304b\u3067\u51e6\u7406\u3092\u5206\u5c90\u3057\u3066\u3044\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u4f55\u3082\u5165\u529b\u3055\u308c\u3066\u3044\u306a\u3044\u300c\u7a7a\u6587\u5b57\u300d\u306e\u5834\u5408\u3068\u300c\u30ad\u30e3\u30f3\u30bb\u30eb\u30dc\u30bf\u30f3\u300d\u304c\u30af\u30ea\u30c3\u30af\u3055\u308c\u305f\u5834\u5408\u306e\u51e6\u7406\u3092\u66f8\u304f\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">var result = prompt('\u6587\u5b57\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044');\n\nif( result ) {\n\n    console.log('\u6587\u5b57\u304c\u5165\u529b\u3055\u308c\u307e\u3057\u305f');\n\n}\nelse {\n\n    console.log('\u6587\u5b57\u304c\u5165\u529b\u3055\u308c\u307e\u305b\u3093\u3067\u3057\u305f');\n\n}<\/pre>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001prompt()\u306b\u3088\u3063\u3066\u53d6\u5f97\u3057\u305f\u8fd4\u308a\u5024\u3092\u5909\u6570\u300cresult\u300d\u306b\u4ee3\u5165\u3057\u3066\u3044\u308b\u306e\u304c\u308f\u304b\u308a\u307e\u3059\u306d\u3002\u3053\u306e\u3088\u3046\u306b\u3001prompt()\u30e1\u30bd\u30c3\u30c9\u306e\u5834\u5408\u3082\u30e6\u30fc\u30b6\u30fc\u304b\u3089\u306e\u53cd\u5fdc\u3092\u6d3b\u7528\u3057\u305f\u5206\u5c90\u51e6\u7406\u304c\u66f8\u304d\u3084\u3059\u3044\u306e\u3067\u3059\u3002\u6d3b\u7528\u306e\u5e45\u304c\u5e83\u304c\u308a\u305d\u3046\u3067\u3059\u306d\u3002<\/p>\n\n\n\n<p>prompt\u306e\u8a73\u3057\u3044\u4f7f\u3044\u65b9\u306f\u4e0b\u8a18\u306e\u8a18\u4e8b\u3067\u89e3\u8aac\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u305c\u3072\u4f75\u305b\u3066\u78ba\u8a8d\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n            <a href=\"https:\/\/www.sejuku.net\/blog\/56114\" class=\"blog-card-anchor\">\n                <div class=\"blog-card\">\n                <div class=\"blog-card-content\">\n                    <div class=\"blog-card-thumbnail\">\n                    <img decoding=\"async\" class=\"blog-card-thumbnail-img\" src=\"https:\/\/www.sejuku.net\/blog\/wp-content\/uploads\/2018\/06\/image1-150x86.jpg\">\n                    <\/div>\n                    <div class=\"blog-card-title-wrap\">\n                    <div class=\"blog-card-title\">\u3010JavaScript\u5165\u9580\u3011prompt\u3067\u30e6\u30fc\u30b6\u30fc\u306e\u5165\u529b\u3092\u53d7\u3051\u4ed8\u3051\u308b\u65b9\u6cd5<\/div>\n                    <div class=\"blog-card-update-date\">\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n                    <\/div>\n                <\/div>\n                <\/div>\n            <\/a>\n            \n\n\n\n<p class=\"has-text-align-center\"><strong><span class=\"swl-inline-color has-swl-main-color\">\uff3c\u3000\u73fe\u5f79\u30a8\u30f3\u30b8\u30cb\u30a2\u30681on1\u30ec\u30c3\u30b9\u30f3\u304c\u53ef\u80fd\uff01\uff0f<\/span><\/strong><br>    <a class=\"sc_button2\" href=\"https:\/\/www.sejuku.net\/terakoya\/lp3\/?cid=btn_article_plus\">\u516c\u5f0f\u30b5\u30a4\u30c8\u3067\u8a73\u7d30\u3092\u898b\u308b<\/a>\n    <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">alert\uff08\u30a2\u30e9\u30fc\u30c8\uff09\u306e\u4f7f\u3044\u65b9\u307e\u3068\u3081<\/h2>\n\n\n\n<p>\u6700\u5f8c\u306b\u3001alert()\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u3066\u304a\u304d\u307e\u3059\uff01\u307e\u305a\u3001\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u3057\u3066\u4efb\u610f\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u51fa\u529b\u3059\u308b\u306b\u306f\u6b21\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">alert('\u30a2\u30e9\u30fc\u30c8\u306e\u30e1\u30c3\u30bb\u30fc\u30b8')\n<\/pre>\n\n\n\n<p>\u3053\u308c\u3067\u5b9f\u884c\u3059\u308b\u3068\u3001\u753b\u9762\u306b\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u3067\u30a2\u30e9\u30fc\u30c8\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\u3002alert()\u306e\u5f15\u6570\u306b\u306f\u5909\u6570\u3082\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">var warn = \"\u30c6\u30ad\u30b9\u30c8\u6587\u5b57\";\n\nalert(warn);\n<\/pre>\n\n\n\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001\u6587\u5b57\u5217\u304c\u683c\u7d0d\u3055\u308c\u305f\u5909\u6570\u300cwarn\u300d\u3092alert()\u306e\u5f15\u6570\u306b\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u306d\u3002\u307e\u305f\u3001\u4ed6\u306b\u3082\u6570\u5024\u3001\u8a08\u7b97\u5f0f\u3001\u6539\u884c\u30b3\u30fc\u30c9\u306a\u3069\u3082\u542b\u3081\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\uff01<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">alert(10 *20 \/ 3 );\n\nalert('\u4eca\u65e5\u306fn\u826f\u3044\u5929\u6c17\u3067\u3059');  \n<\/pre>\n\n\n\n<p>alert()\u306e\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u30c0\u30a4\u30a2\u30ed\u30b0\u306f\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3067\u304d\u307e\u305b\u3093\u304c\u3001\u985e\u4f3c\u30e1\u30bd\u30c3\u30c9\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3088\u308a\u9ad8\u5ea6\u306a\u4f7f\u3044\u65b9\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4f8b\u3048\u3070\u3001\u300cYes \/ No\u300d\u3067\u6761\u4ef6\u5206\u5c90\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308bconfirm()\u3084\u3001\u30e6\u30fc\u30b6\u30fc\u306b\u4efb\u610f\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u5165\u529b\u3057\u3066\u3082\u3089\u3046\u3053\u3068\u3067\u6761\u4ef6\u5206\u5c90\u53ef\u80fd\u306aprompt()\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u307e\u3068\u3081<\/h2>\n\n\n\n<p>\u3044\u304b\u304c\u3067\u3057\u305f\u304b\uff1f\u30a2\u30e9\u30fc\u30c8\u8868\u793a\u306e\u4f5c\u308a\u65b9\u81ea\u4f53\u306f\u3068\u3066\u3082\u7c21\u5358\u3067\u3059\u306d\uff01<\/p>\n\n\n\n<p>\u3057\u304b\u3057\u3001\u3069\u306e\u3088\u3046\u306a\u5834\u9762\u3067\u4f7f\u7528\u3059\u308b\u304b\u306f\u304d\u3061\u3093\u3068\u8a2d\u8a08\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3042\u307e\u308a\u306b\u591a\u304f\u306e\u7b87\u6240\u3067\u8a2d\u5b9a\u3059\u308b\u3068\u3001\u30e6\u30fc\u30b6\u5074\u3067\u30dd\u30c3\u30d7\u30a2\u30c3\u30d7\u306e\u51e6\u7406\u304c\u624b\u9593\u306b\u306a\u308a\u4e0d\u4fbf\u3068\u611f\u3058\u3066\u3057\u307e\u3046\u6050\u308c\u3082\u3042\u308b\u304b\u3089\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u305d\u306e\u305f\u3081\u3001\u521d\u5b66\u8005\u306e\u65b9\u306f\u305d\u306e\u3053\u3068\u3092\u982d\u306b\u5165\u308c\u3066\u8a2d\u8a08\u3059\u308b\u3053\u3068\u3092\u30aa\u30b9\u30b9\u30e1\u3057\u307e\u3059\u3002\u305c\u3072\u30a2\u30e9\u30fc\u30c8\u3092\u6d3b\u7528\u3057\u3066\u3001\u697d\u3057\u3044JavaScript\u751f\u6d3b\u3092\u9001\u3063\u3066\u304f\u3060\u3055\u3044\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30b5\u30a4\u30c8\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u6642\u306b\u3001\u30a8\u30e9\u30fc\u304c\u8d77\u304d\u305f\u3053\u3068\u306a\u3069\u3092\u77e5\u3089\u305b\u308b\u30e1\u30c3\u30bb\u30fc\u30b8\u30dc\u30c3\u30af\u30b9\u304c\u8868\u793a\u3055\u308c\u305f\u7d4c\u9a13\u3092\u3082\u3064\u65b9\u3082\u591a\u3044\u3068\u601d\u3044\u307e\u3059\u3002JavaScript\u3067\u306f\u305d\u306e\u3088\u3046\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u30dc\u30c3\u30af\u30b9\u3092\u8868\u793a\u3059\u308b\u305f\u3081\u306balert(\u30a2\u30e9\u30fc\u30c8)\u3068\u547c\u3070\u308c\u308b\u4ed5 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