{"id":33594,"date":"2022-01-07T02:08:33","date_gmt":"2022-01-06T17:08:33","guid":{"rendered":"https:\/\/kinqsta.com\/jp\/?p=33594&#038;post_type=knowledgebase&#038;preview_id=33594"},"modified":"2025-10-02T04:49:54","modified_gmt":"2025-10-01T19:49:54","slug":"what-is-javascript","status":"publish","type":"post","link":"https:\/\/kinqsta.com\/jp\/blog\/what-is-javascript\/","title":{"rendered":"JavaScript\u3068\u306f\uff1f\u4e16\u754c\u3067\u6700\u3082\u666e\u53ca\u3057\u3066\u3044\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u8a00\u8a9e\u3092\u7406\u89e3\u3057\u3088\u3046"},"content":{"rendered":"<p>\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u305f\u3068\u3053\u308d\u3001Java\u306e\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u304c\u5fc5\u8981\u3068\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u2500\u3042\u306a\u305f\u306b\u3082\u3001\u304d\u3063\u3068\u8eab\u306b\u899a\u3048\u304c\u3042\u308b\u306f\u305a\u3002<\/p>\n<p>\u30b5\u30a4\u30c8\u306e\u30a4\u30f3\u30bf\u30e9\u30af\u30c6\u30a3\u30d6\u306a\u6a5f\u80fd\u306a\u3069\u3067\u3001Java\u306b\u89aa\u3057\u3093\u3067\u3044\u308b\u65b9\u306f\u591a\u3044\u3068\u601d\u3044\u307e\u3059\u304c\u3001JavaScript\u3068\u306a\u308b\u3068\u3001\u3042\u307e\u308a\u99b4\u67d3\u307f\u304c\u306a\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002\u3080\u3057\u308d\u3053\u306e2\u3064\u304c\u540c\u3058\u3082\u306e\u3060\u3068\u8aa4\u89e3\u3055\u308c\u304c\u3061\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001JavaScript\u3068\u306f\u4f55\u304b\u3001\u305d\u3057\u3066\u3001Java\u3068JavaScript\u306e\u9055\u3044\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002\u3055\u3089\u306b\u3001JavaScript\u306e\u91cd\u8981\u306a\u6a5f\u80fd\u306b\u3082\u89e6\u308c\u307e\u3059\u3002<\/p>\n<p>\u305d\u308c\u3067\u306f\u53c2\u308a\u307e\u3057\u3087\u3046\u3002<\/p>\n<div><\/div><kinsta-auto-toc heading=\"Table of Contents\" exclude=\"last\" list-style=\"arrow\" selector=\"h2\" count-number=\"-1\"><\/kinsta-auto-toc>\n<h3><strong>JavaScript<\/strong><strong>\u306b\u3064\u3044\u3066\u3001<\/strong><a href=\"https:\/\/www.youtube.com\/watch?v=vCWs3oBHLe8\"><strong>\u52d5\u753b\u7248<\/strong><\/a><strong>\u306e\u8aac\u660e\u3082\u3054\u7528\u610f\u3057\u3066\u3044\u307e\u3059\u3002<\/strong><\/h3>\n<kinsta-video src=\"https:\/\/www.youtube.com\/watch?v=vCWs3oBHLe8\"><\/kinsta-video>\n<h2>JavaScript\u3068\u306f\uff1f<\/h2>\n<p>JavaScript\u3068\u306f\u3001\u7c21\u5358\u306b\u8a00\u3048\u3070\u3001\u30a6\u30a7\u30d6\u30da\u30fc\u30b8\u306b\u30a4\u30f3\u30bf\u30e9\u30af\u30c6\u30a3\u30d6\u306a\u6a5f\u80fd\u3084\u52d5\u7684\u30b3\u30f3\u30c6\u30f3\u30c4\u3092\u8ffd\u52a0\u3059\u308b\u3001<a href=\"https:\/\/kinqsta.com\/blog\/scripting-languages\/\">\u4eba\u6c17\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u8a00\u8a9e<\/a>\u3067\u3059\u3002\u3088\u304f\u77e5\u3089\u308c\u3066\u3044\u308bJavaScript\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u4f8b\u3068\u3057\u3066\u306f\u3001\u30d5\u30a9\u30fc\u30e0\u3001\u30d5\u30a9\u30c8\u30ae\u30e3\u30e9\u30ea\u30fc\u3001\u753b\u50cf\u30b9\u30e9\u30a4\u30c9\u30b7\u30e7\u30fc\u3001\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001JavaScript\u306f\u308f\u308a\u3068\u76f4\u611f\u7684\u3067\u308f\u304b\u308a\u3084\u3059\u304f\u3001\u5b66\u7fd2\u3057\u3084\u3059\u3044\u306e\u304c\u7279\u5fb4\u3067\u3059\u3002\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u5236\u4f5c\u521d\u5fc3\u8005\u306e\u65b9\u304c\u6700\u521d\u306b\u5b66\u3076\u306e\u306b\u3074\u3063\u305f\u308a\u3067\u3059\u3002<\/p>\n<p>JavaScript\u306f\u3001\u9ad8\u5ea6\u306b\u30a4\u30f3\u30bf\u30e9\u30af\u30c6\u30a3\u30d6\u306a\u30b5\u30a4\u30c8\u306e\u6a5f\u80fd\u3092\u5b9f\u73fe\u3059\u308b\u3001\u4e00\u756a\u6700\u5f8c\u306e\u30ec\u30a4\u30e4\u30fc\u3067\u3059\u3002<a href=\"https:\/\/kinqsta.com\/blog\/html-vs-html5\/\">HTML<\/a>\u306f\u3001\u30da\u30fc\u30b8\u306e\u57fa\u672c\u69cb\u9020\u3092\u898f\u5b9a\u3057\u307e\u3059\u3002<a href=\"https:\/\/kinqsta.com\/jp\/blog\/wordpress-css\/#what-is-css-editing\">CSS<\/a>\u306f\u30b9\u30bf\u30a4\u30eb\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30b5\u30a4\u30c8\u306e\u898b\u305f\u76ee\u3092\u53f8\u308a\u307e\u3059\u3002\u305d\u3057\u3066\u3001JavaScript\u306f\u4e00\u7a2e\u306e\u30b9\u30d1\u30a4\u30b9\u3067\u3059\u3002<\/p>\n<p>JavaScript\u3092\u5b66\u3076\u969b\u306b\u306f\u3001HTML\u3001CSS\u3001JavaScript\u306e\u95a2\u4fc2\u3092\u7406\u89e3\u3057\u3001\u305d\u308c\u3089\u304c\u3069\u306e\u3088\u3046\u306b\u7d44\u307f\u5408\u308f\u3055\u308a\u30b5\u30a4\u30c8\u304c\u8868\u793a\u3055\u308c\u308b\u306e\u304b\u3092\u77e5\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>JavaScript\u306f\u4f55\u306b\u4f7f\u3046\u306e\u304b<\/h2>\n<p>JavaScript\u306b\u306f<a href=\"https:\/\/www.learnacademy.org\/blog\/javascript-used-for\/\">\u69d8\u3005\u306a\u7528\u9014<\/a>\u304c\u3042\u308a\u307e\u3059\u3002\u30a4\u30f3\u30bf\u30e9\u30af\u30c6\u30a3\u30d6\u306aWeb\u30da\u30fc\u30b8\u3084\u30e2\u30d0\u30a4\u30eb\u30a2\u30d7\u30ea\u3067\u3001\u4e00\u5ea6\u306f\u4f53\u611f\u3057\u305f\u3053\u3068\u304c\u3042\u308b\u306f\u305a\u3067\u3059\u3002JavaScript\u306e\u6700\u3082\u5178\u578b\u7684\u306a\u7528\u9014\u304c\u3001\u30a4\u30f3\u30bf\u30e9\u30af\u30c6\u30a3\u30d6\u306a\u30d5\u30a9\u30fc\u30e0\u3084\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306a\u3069\u306e\u8981\u7d20\u306e\u5b9f\u88c5\u3067\u3059\u3002\u3082\u3061\u308d\u3093\u3001\u305d\u308c\u4ee5\u5916\u306b\u3082\u5e45\u5e83\u3044\u6d3b\u7528\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30a6\u30a7\u30d6\u30d6\u30e9\u30a6\u30b6\u30d9\u30fc\u30b9\u306e\u30b2\u30fc\u30e0<\/strong>\uff1a2D\u30013D\u30b2\u30fc\u30e0<\/li>\n<li><strong>\u30e2\u30d0\u30a4\u30eb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u958b\u767a<\/strong>\uff1a\u7aef\u672b\u306e\u6a5f\u7a2e\u3092\u9078\u3070\u306a\u3044\u306e\u3067\u4fbf\u5229<\/li>\n<li><strong>\u30d7\u30ec\u30bc\u30f3\u30c6\u30fc\u30b7\u30e7\u30f3<\/strong>\uff1a\u30a6\u30a7\u30d6\u30d9\u30fc\u30b9\u306e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u30b9\u30e9\u30a4\u30c9\u306e\u4f5c\u6210<\/li>\n<\/ul>\n<p>JavaScript\u306f\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30b5\u30a4\u30c9\u3067\u6a5f\u80fd\u3059\u308b\u3053\u3068\u304c\u307b\u3068\u3093\u3069\u3067\u3059\u304c\u3001Web\u30b5\u30fc\u30d0\u30fc\u306e\u4f5c\u6210\u306a\u3069\u3001\u30b5\u30fc\u30d0\u30fc\u30b5\u30a4\u30c9\u3067\u3082\u6d3b\u8e8d\u3057\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_99433\" aria-describedby=\"caption-attachment-99433\" style=\"width: 1024px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-99433 size-large\" src=\"https:\/\/kinqsta.com\/wp-content\/uploads\/2021\/07\/dinosaur-gameover-1024x358.png\" alt=\"JavaScript\u3092\u4f7f\u3063\u305fWeb\u30d6\u30e9\u30a6\u30b6\u30b2\u30fc\u30e0\u306e\u4f8b\uff08\u6050\u7adc\u3092\u52d5\u304b\u3059\u30b2\u30fc\u30e0\uff09\" width=\"1024\" height=\"358\"><figcaption id=\"caption-attachment-99433\" class=\"wp-caption-text\">JavaScript\u3092\u4f7f\u3063\u305fWeb\u30d6\u30e9\u30a6\u30b6\u30b2\u30fc\u30e0\u306e\u4f8b\uff08\u6050\u7adc\u3092\u52d5\u304b\u3059\u30b2\u30fc\u30e0\uff09<\/figcaption><\/figure>\n<h2>Java\u3068JavaScript\u306e\u9055\u3044<\/h2>\n<p>\u307e\u305a\u3001\u6ce8\u610f\u3057\u3066\u3044\u305f\u3060\u304d\u305f\u3044\u70b9\u304b\u3089\u3002\u300cJava\u300d\u3068\u3044\u3046\u8a00\u8449\u304c\u5171\u901a\u3057\u3066\u3044\u308b\u3082\u306e\u306e\u3001Java\u3068JavaScript\u306f\u5b8c\u5168\u306a\u308b\u5225\u7269\u3067\u3059\u3002Java\u3082JavaScript\u3082\u3001Web\u30da\u30fc\u30b8\u3084Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u958b\u767a\u3059\u308b\u305f\u3081\u306e\u8a00\u8a9e\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u4e21\u8005\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u660e\u78ba\u306a\u9055\u3044\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/strong>\uff1aJava\u306f<a href=\"https:\/\/kinqsta.com\/blog\/python-object-oriented-programming\/\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e<\/a>\u3067\u3059\u3002\u4e00\u65b9\u3067\u3001JavaScript\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30d9\u30fc\u30b9\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u8a00\u8a9e\u3067\u3059\u3002<\/li>\n<li><strong>\u69cb\u6587<\/strong>\uff1aJavaScript\u306e\u69cb\u6587\u306f\u3001Java\u307b\u3069\u6b63\u5f0f\u3067\u306f\u306a\u304f\u3001\u69cb\u9020\u5316\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002\u305d\u306e\u305f\u3081\u3001\u591a\u304f\u306e\u4eba\u306b\u3068\u3063\u3066\u3088\u308a\u5206\u304b\u308a\u3084\u3059\u3044\u3082\u306e\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/li>\n<li><strong>\u30b3\u30f3\u30d1\u30a4\u30eb<\/strong>\uff1aJava\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u8a00\u8a9e\u3067\u3059\u304c\u3001JavaScript\u306f\u5b9f\u884c\u6642\u306b\u4e00\u884c\u305a\u3064\u89e3\u91c8\u3055\u308c\u308b\u30a4\u30f3\u30bf\u30d7\u30ea\u30bf\u8a00\u8a9e\u3067\u3059\u3002\u30b3\u30f3\u30d1\u30a4\u30eb\u8a00\u8a9e\u306e\u65b9\u304c\u9ad8\u901f\u3067\u3059\u304c\u3001\u30a4\u30f3\u30bf\u30d7\u30ea\u30bf\u8a00\u8a9e\u306e\u65b9\u304c\u3001\u67d4\u8edf\u6027\u304c\u9ad8\u3044\u50be\u5411\u306b\u3042\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u74b0\u5883<\/strong>\uff1aJava\u306f\u4eee\u60f3\u30de\u30b7\u30f3\u3084<a href=\"https:\/\/kinqsta.com\/jp\/browser-market-share\/\">\u30d6\u30e9\u30a6\u30b6<\/a>\u3067\u52d5\u4f5c\u3055\u305b\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u57fa\u672c\u7684\u306b\u3069\u306e\u3088\u3046\u306a\u74b0\u5883\u3067\u3082\u4f7f\u7528\u3067\u304d\u307e\u3059\u304c\u3001JavaScript\u306f\u30d6\u30e9\u30a6\u30b6\u306e\u307f\u3067\u6a5f\u80fd\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf<\/strong>\uff1aJava\u306fJavaScript\u306b\u6bd4\u3079\u3066<a href=\"https:\/\/towardsdatascience.com\/java-vs-javascript-which-is-the-best-choice-for-2019-a41ee2d3f78d\">\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u591a\u304f<\/a>\u3001Web\u30da\u30fc\u30b8\u3084Web\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u306fJavaScript\u304c\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n<h2>\u00a0JavaScript\u306f\u5b89\u5168\u306a\u306e\u304b<\/h2>\n<p>JavaScript\u306f\u5e83\u304f\u666e\u53ca\u3057\u3001Web\u958b\u767a\u306b\u5229\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u8106\u5f31\u6027\u3082\u3042\u308a\u307e\u3059\u3002JavaScript\u306e\u8106\u5f31\u6027\u3092\u5229\u7528\u3057\u305f\u30b5\u30a4\u30d0\u30fc\u653b\u6483\u306e\u4ee3\u8868\u7684\u306a\u3082\u306e\u306b\u3001\u30af\u30ed\u30b9\u30b5\u30a4\u30c8\u30b9\u30af\u30ea\u30d7\u30c6\u30a3\u30f3\u30b0\uff08XSS\uff09\u653b\u6483\u304c\u3042\u308a\u3001XSS\u653b\u6483\u306e\u5229\u7528\u304b\u3089\u3001\u500b\u4eba\u60c5\u5831\u306e\u76d7\u96e3\u304c\u8a66\u307f\u3089\u308c\u307e\u3059\u3002\u8106\u5f31\u6027\u306e\u5229\u7528\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u308b\u305f\u3081\u306b\u306f\u3001\u958b\u767a\u4e2d\u306b<a href=\"https:\/\/kinqsta.com\/jp\/blog\/code-review-tools\/\">\u30b3\u30fc\u30c9\u3092\u30c6\u30b9\u30c8\u3057\u3001\u5be9\u67fb\u3059\u308b<\/a>\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u9759\u7684\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30fb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30fb\u30c6\u30b9\u30c8\u3084\u52d5\u7684\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30fb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30fb\u30c6\u30b9\u30c8\uff08SAST\u3084DAST\uff09\u306a\u3069\u306f\u3001\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u958b\u767a\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u306e\u3059\u3079\u3066\u306e\u6bb5\u968e\u3067\u8106\u5f31\u6027\u3092\u7279\u5b9a\u3059\u308b\u306e\u306b\u52b9\u679c\u7684\u3067\u3059\u3002<a href=\"https:\/\/www.clouddefense.ai\/sast-static-application-security-testing\">Cloud Defense<\/a>\u793e\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30ca\u30ea\u30b9\u30c8\u306b\u3088\u308b\u3068\u3001SAST\u306f\u3001\u30b3\u30fc\u30c9\u304c\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30eb\u30fc\u30eb\u306b\u9055\u53cd\u3057\u3066\u3044\u306a\u3044\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3001\u767a\u898b\u3055\u308c\u305f\u8106\u5f31\u6027\u3092\u30bd\u30fc\u30b9\u30d6\u30e9\u30f3\u30c1\u3068\u30bf\u30fc\u30b2\u30c3\u30c8\u30d6\u30e9\u30f3\u30c1\u306e\u9593\u3067\u6bd4\u8f03\u3057\u307e\u3059\u3002\u305d\u3057\u3066\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u4f9d\u5b58\u95a2\u4fc2\u304c\u3001\u65b0\u305f\u306b\u958b\u793a\u3055\u308c\u305f\u8106\u5f31\u6027\u306e\u5f71\u97ff\u3092\u53d7\u3051\u3066\u3044\u308b\u5834\u5408\u306b\u306f\u3001\u901a\u77e5\u3092\u53d7\u3051\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>Vanilla JavaScript<\/h2>\n<p>Vanilla JavaScript\u3068\u306f\u3001\u7d14\u7c8b\u306aJavaScript\u8a00\u8a9e\uff08\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u8ffd\u52a0\u3057\u3066\u3044\u306a\u3044\u72b6\u614b\uff09\u3067\u3059\u3002\u3053\u3053\u3067\u3044\u3046\u300cVanilla\u300d\u3068\u306f\u3001\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3055\u308c\u3066\u3044\u306a\u3044JavaScript\u306e\u3053\u3068\u3092\u6307\u3057\u307e\u3059\u3002Google\u3001Microsoft\u3001Apple\u3001Amazon\u306a\u3069\u3001\u591a\u304f\u306e\u5927\u624b\u4f01\u696d\u304c<a href=\"http:\/\/vanilla-js.com\/\">Vanilla JS<\/a>\u3092\u63a1\u7528\u3057\u3066\u3044\u307e\u3059\u3002Vanilla JavaScript\u306f\u3001\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u3088\u308a\u9ad8\u5ea6\u306a\u6a5f\u80fd\u3092\u5229\u7528\u3057\u59cb\u3081\u308b\u524d\u306b<a href=\"https:\/\/kinqsta.com\/blog\/best-programming-language-to-learn\/#javascript\">JavaScript\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u57fa\u790e\u3092\u5b66\u3076<\/a>\u306e\u306b\u3082\u4fbf\u5229\u3067\u3059\u3002<\/p>\n<h2>JavaScript\u30e9\u30a4\u30d6\u30e9\u30ea<\/h2>\n<p>JavaScript\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u3001\u7279\u5b9a\u306e\u6a5f\u80fd\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081\u306b\u7528\u610f\u3055\u308c\u305f\u30b3\u30fc\u30c9\u306e\u307e\u3068\u307e\u308a\u3067\u3059\u3002\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u521d\u5fc3\u8005\u306e\u65b9\u3067\u3082\u30b5\u30a4\u30c8\u3092\u7d20\u65e9\u304f\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u521d\u5fc3\u8005\u3067\u3082\u7d4c\u9a13\u8c4a\u5bcc\u306a\u4eba\u3067\u3082\u3001\u30b5\u30a4\u30c8\u3084\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u69cb\u7bc9\u306b\u304b\u304b\u308b\u6642\u9593\u3092\u5927\u5e45\u306b\u77ed\u7e2e\u3067\u304d\u307e\u3059\u3002<a href=\"https:\/\/kinqsta.com\/jp\/blog\/javascript-libraries\/\">JavaScript\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u6570\u591a\u304f<\/a>\u3042\u308a\u307e\u3059\u304c\u3001\u4ee3\u8868\u7684\u306a\u3082\u306e\u3068\u3057\u3066\u306f\u3001jQuery\u3001Anime.js\u3001Animate on Scroll\u3001Leaflet.js\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>JavaScript\u3068\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3068\u306e\u95a2\u4fc2<\/h2>\n<p>\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306f\u3001\u9ad8\u5ea6\u306a\u30b5\u30a4\u30c8\u69cb\u7bc9\u30c4\u30fc\u30eb\u3067\u3001\u901a\u5e38\u3001\u3053\u308c\u306b\u306f\u3001\u6a5f\u80fd\u3084\u30c6\u30b9\u30c8\u30b9\u30a4\u30fc\u30c8\u304c\u7d44\u307f\u8fbc\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u30b5\u30fc\u30d0\u30fc\u30b5\u30a4\u30c9\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u306f\u3001<a href=\"https:\/\/kinqsta.com\/blog\/what-is-laravel\/\">Laravel<\/a>\u3001Ruby on Rails\u3001Django\u306a\u3069\u304c\u6709\u540d\u3069\u3053\u308d\u3067\u3059\u3002\u307e\u305f\u3001React.js\u3001Vue.js\u3001<a href=\"https:\/\/kinqsta.com\/jp\/blog\/what-is-node-js\/\">Node.js<\/a>\u306a\u3069\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30b5\u30a4\u30c9\u306eJavaScript\u30d9\u30fc\u30b9\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3082\u4eba\u6c17\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_99435\" aria-describedby=\"caption-attachment-99435\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-99435 size-full\" src=\"https:\/\/kinqsta.com\/wp-content\/uploads\/2021\/06\/reactjs2.jpg\" alt=\"React\u30e9\u30a4\u30d6\u30e9\u30ea\" width=\"900\" height=\"449\"><figcaption id=\"caption-attachment-99435\" class=\"wp-caption-text\">React\u30e9\u30a4\u30d6\u30e9\u30ea\uff08\u51fa\u5178: Betica)<\/figcaption><\/figure>\n<h2>JavaScript DOM<\/h2>\n<p>DOM\uff08Document Object Model\uff09\u306f\u3001JavaScript\u306a\u3069\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3068\u3001\u57fa\u790e\u3068\u306a\u308b\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\uff08\u5177\u4f53\u7684\u306b\u306f\u3001HTML\u3084XML\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\uff09\u3068\u306e\u9593\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002DOM\u306f<a href=\"https:\/\/www.w3.org\/TR\/DOM-Requirements\/\">W3C\uff08World Wide Web Consortium\uff09\u306e\u6a19\u6e96\u898f\u683c<\/a>\u3067\u3001\u300c\u30d7\u30ed\u30b0\u30e9\u30e0\u3084\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e\u30b3\u30f3\u30c6\u30f3\u30c4\u3001\u69cb\u9020\u3001\u30b9\u30bf\u30a4\u30eb\u306b\u52d5\u7684\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3001\u66f4\u65b0\u3059\u308b\u3053\u3068\u3092\u53ef\u80fd\u306b\u3059\u308b\u3001\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3084\u8a00\u8a9e\u306b\u4f9d\u5b58\u3057\u306a\u3044\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u300d\u3068\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306f\u3001\u500b\u3005\u306e\u8981\u7d20\u3084\u30d7\u30ed\u30d1\u30c6\u30a3\uff08<a href=\"https:\/\/kinqsta.com\/jp\/blog\/best-text-editors\/\">\u30c6\u30ad\u30b9\u30c8<\/a>\u3001\u30dc\u30bf\u30f3\u3001\u30ea\u30f3\u30af\u306a\u3069\uff09\u306e\u96c6\u307e\u308a\u3067\u69cb\u6210\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>JavaScript\u306e\u57fa\u672c\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/h2>\n<p>\u4ed6\u306e<a href=\"https:\/\/kinqsta.com\/blog\/best-programming-language-to-learn\/\">\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e<\/a>\u3068\u540c\u69d8\u306b\u3001JavaScript\u306f\u30c7\u30fc\u30bf\u306e\u4fdd\u5b58\u5834\u6240\u3092\u7279\u5b9a\u3059\u308b\u306e\u306b\u5909\u6570\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u5909\u6570\u306b\u306f\u3001\u30b0\u30ed\u30fc\u30d0\u30eb\uff08\u30b3\u30fc\u30c9\u5185\u306e\u3069\u306e\u95a2\u6570\u304b\u3089\u3067\u3082\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\uff09\u306a\u3082\u306e\u3068\u3001\u30d6\u30ed\u30c3\u30af\u30b9\u30b3\u30fc\u30d7\u3068\u547c\u3070\u308c\u308b\u30ed\u30fc\u30ab\u30eb\uff08\u5ba3\u8a00\u3055\u308c\u305f\u30d6\u30ed\u30c3\u30af\u5185\u3067\u306e\u307f\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\uff09\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002\u5909\u6570\u306b\u306f\u3001\u56fa\u5b9a\u5024\uff08\u30ea\u30c6\u30e9\u30eb\u3068\u547c\u3070\u308c\u308b\u5b9a\u6570\uff09\u3068\u5909\u66f4\u53ef\u80fd\u306a\u5024\u304c\u3042\u308a\u307e\u3059\u3002JavaScript\u306b\u306f\u3001\u5b9a\u6570\u3084\u5909\u6570\u3092\u5ba3\u8a00\uff08\u4f5c\u6210\uff09\u3057\u3001\u5024\u3092\u4ee3\u5165\u3059\u308b\u305f\u3081\u306e\u7279\u5225\u306a\u69cb\u6587\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>\u5b9a\u6570\u306e\u5ba3\u8a00<\/h3>\n<p>\u771f\u306e\u5b9a\u6570\u306f\u3001<a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/JavaScript\/Reference\/Statements\/const\"><code>const<\/code> \u3092\u4f7f\u7528<\/a>\u3057\u3066\u4f5c\u6210\u3057\u307e\u3059\u3002<code>Const<\/code>\u306f\u3001\u8aad\u307f\u53d6\u308a\u5c02\u7528\u3001\u5909\u66f4\u4e0d\u53ef\u3001\u30d6\u30ed\u30c3\u30af\u30b9\u30b3\u30fc\u30d7\u4ed8\u304d\u306e\u5b9a\u6570\u3092\u4f5c\u6210\u3057\u307e\u3059\uff08\u300c\u30d6\u30ed\u30c3\u30af\u30b9\u30b3\u30fc\u30d7\u4ed8\u304d\u300d\u3068\u306f\u3001\u5ba3\u8a00\u3057\u305f\u30d6\u30ed\u30c3\u30af\u306e\u5916\u304b\u3089\u306f\u5b9a\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\uff09\u3002const \u3092\u4f7f\u7528\u3057\u3066\u5b9a\u6570\u3092\u4f5c\u6210\u3059\u308b\u4f8b\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">const GOLDEN_RATIO = 1.618; \/\/ create a constant named GOLDEN_RATIO with value 1.618<\/code><\/pre>\n<p>\u5b9a\u6570\u306e\u540d\u524d\u306b\u306f\u5927\u6587\u5b57\u3092\u4f7f\u3044\u307e\u3059\u306e\u3067\u3001\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\u3002\u3053\u308c\u306f\u3001\u5fc5\u9808\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u5e83\u304f\u6d78\u900f\u3057\u3066\u3044\u308b\u539f\u5247\u3067\u3059\u3002\u5909\u6570\u540d\uff08\u5b9a\u6570\u540d\u3092\u542b\u3080\uff09\u306f\u3001\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\uff08\u5c0f\u6587\u5b57\u307e\u305f\u306f\u5927\u6587\u5b57\uff09\u3001\u30a2\u30f3\u30c0\u30fc\u30b9\u30b3\u30a2\uff08<code>_<\/code>\uff09\u3001\u30c9\u30eb\u8a18\u53f7\uff08<code>$<\/code>\uff09\u306e\u3044\u305a\u308c\u304b\u3067\u59cb\u3081\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u5927\u6587\u5b57\u3068\u5c0f\u6587\u5b57\u306f\u533a\u5225\u3055\u308c\u307e\u3059\u306e\u3067\u3001\u5909\u6570\u540d\u306e\u8868\u8a18\u306b\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\u3002\u5b9a\u6570\u306f\u3001\u5909\u6570\u3068\u306f\u7570\u306a\u308a\u3001\u4f5c\u6210\u6642\u306b\u5024\u3092\u5272\u308a\u5f53\u3066\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u6b21\u306e\u3088\u3046\u306a\u8a18\u8ff0\u306f\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">const GOLDEN_RATIO;<\/code><\/pre>\n<h3>Declaring a Variable \u5909\u6570\u306e\u5ba3\u8a00<\/h3>\n<p>\u5909\u6570\u306f\u3001<a href=\"https:\/\/www.codejava.net\/java-core\/the-java-language\/var-keyword-in-java\"><code>var<\/code>\u3092\u4f7f\u3063\u3066\u5ba3\u8a00<\/a>\u3057\u307e\u3059\u3002\u5ba3\u8a00\u6642\u306b\u5024\u3092\u5165\u308c\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u6307\u5b9a\u3057\u3066\u3082\u69cb\u3044\u307e\u305b\u3093\u3057\u3001\u5b9f\u969b\u306b\u306f\u983b\u7e41\u306b\u305d\u3046\u3055\u308c\u3066\u3044\u307e\u3059\u3002<code>var<\/code>\u306f\u3001\u30d6\u30ed\u30c3\u30af\u30b9\u30b3\u30fc\u30d7\u3067\u306f\u306a\u304f\u30b0\u30ed\u30fc\u30d0\u30eb\u30b9\u30b3\u30fc\u30d7\u3068\u306a\u308a\u307e\u3059\uff08\u305f\u3060\u3057\u3001\u95a2\u6570\u306e\u4e2d\u306b\u3042\u308b\u5834\u5408\u306b\u306f\u3001\u95a2\u6570\u30b9\u30b3\u30fc\u30d7\u3092\u6301\u3061\u307e\u3059\uff09\u3002<\/p>\n<pre><code class=\"language-javascript\">var variable1; \/\/ declare a variable called variable1\n\nvar variable2 = \"2021\"; \/\/ declare a string variable called variable2 and initialize with value 2021\n\nvariable1 = \"Thank goodness it's\" \/\/ assign string value to previously declared variable variable1\n\nconsole.log(variable1 + \" \" + variable2); \/\/ display \"Thank goodness it's 2021\"<\/code><\/pre>\n<p>JavaScript\u306e\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u306f\u30bb\u30df\u30b3\u30ed\u30f3\u3067\u7d42\u308f\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\u3002JavaScript\u3067\u306f\u3001<code>\/\/<\/code>\u3067\u30b3\u30e1\u30f3\u30c8\u3092\u633f\u5165\u3067\u304d\u3001<code>\/\/<\/code>\u3068\u884c\u672b\u306e\u9593\u306b\u3042\u308b\u5168\u3066\u304c\u30b3\u30fc\u30c9\u304b\u3089\u9664\u5916\u3055\u308c\u307e\u3059\u3002\u5909\u6570\u306b\u306f\u3001\u6570\u5024\u3001\u6587\u5b57\u5217\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306a\u3069\u3001\u3055\u307e\u3056\u307e\u306a\u30c7\u30fc\u30bf\u578b\u3092\u5229\u7528\u3067\u304d\u307e\u3059\u3002JavaScript\u306b\u304a\u3051\u308b\u5909\u6570\u306e\u5272\u308a\u5f53\u3066\u306f\u52d5\u7684\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u540c\u3058\u30b3\u30fc\u30c9\u5185\u3067\u3001\u5909\u6570\u3092\u69d8\u3005\u306a\u30c7\u30fc\u30bf\u578b\u306b\u5272\u308a\u5f53\u3066\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u5dfb\u304d\u4e0a\u3052<\/h2>\n<p><a href=\"https:\/\/scotch.io\/courses\/10-need-to-know-javascript-concepts\/declaring-javascript-variables-var-let-and-const\">JavaScript\u306b\u304a\u3051\u308b\u5909\u6570\u306e\u5ba3\u8a00<\/a>\u306b\u3064\u3044\u3066\u7406\u89e3\u3057\u305f\u3068\u3053\u308d\u3067\u3001\u6b21\u306bJavaScript\u3067\u3001\u3069\u306e\u3088\u3046\u306b\u5909\u6570\u306e\u5ba3\u8a00\u306e\u5834\u6240\u304c\u6271\u308f\u308c\u3066\u3044\u308b\u304b\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u4e00\u822c\u7684\u306a\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u624b\u6cd5\u3068\u3057\u3066\u3001\u5909\u6570\u3092\u5b9a\u7fa9\u3059\u308b\u524d\u3001\u307e\u305f\u306f\u5b9a\u7fa9\u3059\u308b\u3068\u540c\u6642\u306b\u5ba3\u8a00\u3057\u307e\u3059\u3002\u3044\u304f\u3064\u304b\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u306f\u3001\u5fc5\u9808\u3067\u3059\u3002\u3057\u304b\u3057\u3001JavaScript\u3067\u306f\u3001\u5909\u6570\u3092\u5b9a\u7fa9\u3057\u305f\u308a\u4f7f\u7528\u3057\u305f\u308a\u3057\u305f\u5f8c\u306b\u5ba3\u8a00\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002JavaScript\u3067\u306f\u3001\u5dfb\u304d\u4e0a\u3052\u3068\u3044\u3046\u3082\u306e\u3092\u4f7f\u3063\u3066\u3001\u5ba3\u8a00\u3092\u305d\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3084\u95a2\u6570\u306e\u5148\u982d\u306b\u79fb\u52d5\u53ef\u80fd\u3067\u3059\u3002\u5dfb\u304d\u4e0a\u3052\u3092\u7528\u3044\u3001\u5ba3\u8a00\u306e\u5931\u6557\u3092\u624b\u8efd\u306b\u4fee\u6b63\u3067\u304d\u307e\u3059\u304c\u3001\u4f7f\u7528\u5f8c\u306b\u5909\u6570\u3092\u5ba3\u8a00\u3059\u308b\u884c\u70ba\u306f\u3001<a href=\"https:\/\/kinqsta.com\/jp\/blog\/web-design-best-practices\/\">\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/a>\u3068\u306f\u8a00\u3048\u307e\u305b\u3093\u3002\u307e\u305f\u3001\u5dfb\u304d\u4e0a\u3052\u306f\u5ba3\u8a00\u306b\u306e\u307f\u9069\u7528\u3055\u308c\u308b\u305f\u3081\u3001\u4e88\u671f\u305b\u306c\u554f\u984c\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u5909\u6570\u306e\u5ba3\u8a00\u3068\u521d\u671f\u5316\u304c\u540c\u3058\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u3067\u884c\u308f\u308c\u308b\u30b1\u30fc\u30b9\u3092\u8003\u3048\u3066\u307f\u308b\u3068\u3001\u5dfb\u304d\u4e0a\u3052\u306b\u3088\u308a\u30d6\u30ed\u30c3\u30af\u306e\u5148\u982d\u306b\u5ba3\u8a00\u304c\u4f5c\u6210\u3055\u308c\u3001\u5909\u6570\u306b\u672a\u5b9a\u7fa9\u306e\u5024\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u5b9f\u969b\u306e\u5ba3\u8a00\u6587\u306e\u524d\u306e\u30d6\u30ed\u30c3\u30af\u3067\u305d\u306e\u5909\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u305d\u306e\u5909\u6570\u306f\u521d\u671f\u5316\u5024\u3067\u306f\u306a\u304f\u672a\u5b9a\u7fa9\u3067\u3042\u308b\u3068\u307f\u306a\u3055\u308c\u307e\u3059\u3002\u4e0a\u306e\u4f8b\u3092\u4f7f\u3063\u3066\u3001\u5dfb\u304d\u4e0a\u3052\u306e\u6319\u52d5\u3092\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre><code class=\"language-javascript\">var variable_1 = \"Thank goodness it's\"; \/\/ declare and initialize a string variable called variable_1\n\nconsole.log(variable_1 + \" \" + variable_2); \/\/\n\nvar variable_2 = \"2021\" \/\/ declare and initialize a string variable called variable2<\/code><\/pre>\n<p>\u5dfb\u304d\u4e0a\u3052\u306f\u3001<code>variable_2<\/code>\u306e\u5ba3\u8a00\u3092\u30d6\u30ed\u30c3\u30af\u306e\u5148\u982d\u306b\u52d5\u304b\u3057\u307e\u3059\u304c\u3001\u5272\u308a\u5f53\u3066\u3089\u308c\u305f\u5024\u306f\u79fb\u52d5\u3057\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u3001\u6b21\u3068\u307b\u307c\u540c\u3058\u52d5\u304d\u3092\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">var variable_1 = \"Thank goodness it's\"; \/\/ declare and initialize a string variable called variable_1\n\nvar variable_2;\n\nconsole.log(variable1 + \" \" + variable2); \/\/\n\nvariable_2 = \"2021\" \/\/ assign string value to variable2<\/code><\/pre>\n<p>\u3044\u305a\u308c\u306e\u30d1\u30bf\u30fc\u30f3\u3067\u3042\u3063\u3066\u3082\u3001\u6700\u7d42\u7684\u306a\u5024\u300cThank goodness it&#8217;s 2021\u300d\u306f\u51fa\u529b\u306b\u542b\u307e\u308c\u307e\u305b\u3093\u3002\u6f5c\u5728\u7684\u306a\u554f\u984c\u3092\u56de\u907f\u3057\u3001\u30af\u30ea\u30fc\u30f3\u306a\u30b3\u30fc\u30c9\u3092\u76ee\u6307\u3059\u3068\u3044\u3046\u610f\u5473\u3067\u3001\u5909\u6570\u5ba3\u8a00\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3092\u512a\u5148\u3059\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<\/p>\n<h2>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/h2>\n<p>JavaScript\u306f\u3001<a href=\"https:\/\/javascript.info\/object-methods\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6982\u5ff5\u306b\u57fa\u3065\u3044\u3066<\/a>\u3044\u307e\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u3084\u30e1\u30bd\u30c3\u30c9\u3001\u3042\u308b\u3044\u306f\u305d\u306e\u4e21\u65b9\u3092\u5185\u5305\u3059\u308b\u3053\u3068\u306e\u3067\u304d\u308b\u30b3\u30f3\u30c6\u30ca\u3067\u3059\u3002\u7c21\u5358\u306a\u4f8b\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u300ccountry\u300d\u3068\u3044\u3046\u540d\u524d\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u306f\u3001\u540d\u524d\u3001\u5927\u9678\u3001\u9996\u90fd\u3001\u4eba\u53e3\u304c\u3042\u308a\u307e\u3059\u3002JavaScript\u3067\u3053\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u65b9\u6cd5\u306f\u3001\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002\u307e\u305a\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30ea\u30c6\u30e9\u30eb\u307e\u305f\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u521d\u671f\u5316\u5b50\u304c\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">var country = {\n\n    name:\"France\",\n\n    continent:\"Europe\",\n\n    capital:\"Paris\",\n\n    population:62250000;\n\n}<\/code><\/pre>\n<p>\u307e\u305f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3057\u3066\u304b\u3089\u3001\u305d\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u5272\u308a\u5f53\u3066\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">var country = new Object();\n\ncountry.name = \"France\";\n\ncountry.continent = \"Europe\";\n\ncountry.capital = \"Paris\";\n\ncountry.population = 62250000;<\/code><\/pre>\n<p>\u306a\u304a\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u53c2\u7167\u3059\u308b\u306b\u306f\u3001<code>object.property<\/code> \u3068\u3044\u3046\u69cb\u6587\u3092\u4f7f\u3044\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u95a2\u6570\u3092\u4f7f\u3063\u3066\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">function country(name, continent, capital, population) {\n\n    country.name = name;\n\n    country.continent = continent;\n\n    country.capital = capital;\n\n    country.population = population;\n\n}<\/code><\/pre>\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">france = new country(\"France\",\"Europe\",\"Paris\",62250000)<\/code><\/pre>\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u306f\u3001\u5909\u6570\u3068\u95a2\u6570\u304c\u3042\u308a\u307e\u3059\u3002\u5f8c\u8ff0\u3057\u307e\u3059\u304c\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u304c\u95a2\u6570\u306e\u5834\u5408\u306f\u3001\u30e1\u30bd\u30c3\u30c9\u3068\u547c\u3070\u308c\u307e\u3059\u3002<\/p>\n<h3>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8 VS \u30af\u30e9\u30b9<\/h3>\n<p>\u4e00\u8a00\u3067\u8a00\u3048\u3070\u3001\u30af\u30e9\u30b9\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6c4e\u7528\u7684\u306a\u69cb\u9020\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u3067\u3059\u3002\u30af\u30e9\u30b9\u306f\u3001\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5f62\u5f0f\u3067\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">class country {\n\n    Constructor (name,continent,capital,population) {\n\n        country.name = name;\n\n        country.continent = continent;\n\n        country.capital = capital;\n\n        country.population = population;\n\n    }\n\n}<\/code><\/pre>\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u540c\u3058\u3088\u3046\u306b\u3001\u30af\u30e9\u30b9\u306f\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3061\u5f97\u307e\u3059\u3002<\/p>\n<h2>\u5b9a\u6570\u3068\u5909\u6570\u306e\u4f7f\u7528<\/h2>\n<p>\u4ed6\u306e\u8a00\u8a9e\u3068\u540c\u69d8\u306b\u3001JavaScript\u306b\u306f\u3001\u5909\u6570\u3084\u95a2\u6570\u306b\u4f7f\u7528\u3059\u308b<a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/JavaScript\/Reference\/Operators\">\u8907\u6570\u7a2e\u985e\u306e\u6f14\u7b97\u5b50\u304c\u3042\u308a<\/a>\u3001\u305d\u306e\u307b\u3068\u3093\u3069\u306f\u3059\u3050\u306b\u7406\u89e3\u3067\u304d\u308b\u306f\u305a\u3067\u3059\u3002<\/p>\n<ul>\n<li>\u4ee3\u5165\u6f14\u7b97\u5b50 (<code>=<\/code>, <code>+=<\/code>, <code>-=<\/code>, <code>*=<\/code>, <code>\/=<\/code>, <code>%=<\/code>)<\/li>\n<li>\u6bd4\u8f03\u6f14\u7b97\u5b50 (<code>==<\/code>, <code>===<\/code>, <code>!=<\/code>, <code>!==<\/code>, <code>&gt;<\/code>, <code>&gt;=<\/code>, <code>&lt;<\/code>, <code>&lt;=<\/code>)<\/li>\n<li>\u30d3\u30c3\u30c8\/\u8ad6\u7406\u6f14\u7b97\u5b50 (\u5f8c\u8ff0)<\/li>\n<li>\u7b97\u8853\u6f14\u7b97\u5b50 (<code>+<\/code>, <code>-<\/code>, <code>*<\/code>, <code>\/<\/code>, <code>%<\/code>, <code>++<\/code>, <code>--<\/code>)<\/li>\n<li>\u7279\u5225\u306a\u6f14\u7b97\u5b50<\/li>\n<\/ul>\n<p>\u53b3\u5bc6\u7b49\u4fa1\u6f14\u7b97\u5b50\u3084\u53b3\u5bc6\u4e0d\u7b49\u4fa1\u6f14\u7b97\u5b50\u306a\u3069\u3001<a href=\"https:\/\/kinqsta.com\/jp\/blog\/hire-wordpress-developer\/\">\u521d\u5fc3\u8005\u30d7\u30ed\u30b0\u30e9\u30de\u30fc<\/a>\u306b\u306f\u3042\u307e\u308a\u306a\u3058\u307f\u306e\u306a\u3044\u6f14\u7b97\u5b50\u3082\u3042\u308a\u307e\u3059\u3002\u300c<code>===<\/code>\u300d\u306f\u30012\u3064\u306e\u30aa\u30da\u30e9\u30f3\u30c9\u304c\u540c\u3058\u5024\u3068\u578b\u306e\u4e21\u65b9\u3092\u6301\u3063\u3066\u3044\u308b\u304b\u3069\u3046\u304b\uff08\u3064\u307e\u308a\u3001\u540c\u4e00\u3067\u3042\u308b\u304b\u3069\u3046\u304b\uff09\u3092\u6bd4\u8f03\u3057\u307e\u3059\u3002\u300c<code>!==<\/code>\u300d\u306f\u30012\u3064\u306e\u30aa\u30da\u30e9\u30f3\u30c9\u304c\u540c\u4e00\u3067\u306a\u3044\u304b\u3069\u3046\u304b\u3092\u6bd4\u8f03\u3057\u307e\u3059\u3002\u6b21\u306e\u3088\u3046\u306a\u4f8b\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre><code class=\"language-javascript\">var variable_1 = 5; \/\/ declare variable_1 and assign numeric value 5\n\nvar variable_2 = \"5\"; \/\/ declare variable_2 and assign string value \"5\"\n\nconsole.log(variable_1 === variable_2);\n\nconsole.log(variable_1 !== variable_2);<\/code><\/pre>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u306e\u51fa\u529b\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">FALSE\nTRUE<\/code><\/pre>\n<p>\u307e\u305f\u3001\u300c<code>=<\/code>\u300d\uff08\u4ee3\u5165\u6f14\u7b97\u5b50\uff09\u3068\u300c<code>==<\/code>\u300d\uff08\u6bd4\u8f03\u6f14\u7b97\u5b50\uff09\u306e\u9055\u3044\u306b\u3064\u3044\u3066\u3082\u7406\u89e3\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u300c<code>=<\/code>\u300d\u304c\u5909\u6570\u306e\u5024\u3092\u8a2d\u5b9a\u3059\u308b\u306e\u306b\u5bfe\u3057\u3001\u300c<code>==<\/code>\u300d\u306f2\u3064\u306e\u30aa\u30da\u30e9\u30f3\u30c9\u304c\u540c\u3058\u5024\u3092\u6301\u3064\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3082\u306e\u3067\u3001\u5909\u6570\u304c\u4e0e\u3048\u3089\u308c\u305f\u5024\u3092\u6301\u3064\u304b\u3069\u3046\u304b\u3082\u3053\u308c\u306b\u542b\u307e\u308c\u307e\u3059\u3002IF\u6587\u306a\u3069\u306e\u6761\u4ef6\u6587\u3067\u306f\u3001\u7b49\u4fa1\u6027\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u300c<code>=<\/code>\u300d\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002<\/p>\n<h3>\u30d3\u30c3\u30c8\/\u8ad6\u7406\u6f14\u7b97\u5b50<\/h3>\n<p>JavaScript\u306f\u3001AND\uff08<code>\uff06<\/code>\uff09\u3001OR\uff08<code>\uff5c<\/code>\uff09\u3001NOT\uff08<code>\uff5e<\/code>\uff09\u3001XOR\uff08<code>^<\/code>\uff09\u306e\u5404\u6f14\u7b97\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002JavaScript\u3067\u306f\u3001\u3053\u308c\u3089\u306f\u30d3\u30c3\u30c8\u6f14\u7b97\u5b50\u3068\u547c\u3070\u308c\u307e\u3059\u3002\u30d3\u30c3\u30c8\u6f14\u7b97\u3067\u306f\u3001\u6f14\u7b97\u5b50\u309232\u30d3\u30c3\u30c8\u306e\u30d0\u30a4\u30ca\u30ea\u8868\u73fe\u306b\u5909\u63db\u3057\u3066\u304b\u3089\u6f14\u7b97\u3092\u884c\u3044\u307e\u3059\uff08\u4f8b\uff1a20\u304c10100\u306b\u306a\u308b\uff09\u3002\u3053\u306e\u3088\u3046\u306a\u6f14\u7b97\u306f\u3001<a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/JavaScript\/Guide\/Expressions_and_Operators#bitwise_operators\">\u5909\u63db\u3055\u308c\u305f\u30aa\u30da\u30e9\u30f3\u30c9\u3092\u30d3\u30c3\u30c8\u3054\u3068\u306b\u6bd4\u8f03<\/a>\u3057\u3001\u6574\u6570\u306b\u5909\u63db\u3055\u308c\u305f32\u30d3\u30c3\u30c8\u306e\u30d0\u30a4\u30ca\u30ea\u3092\u8fd4\u3059\u3053\u3068\u304b\u3089\u3001\u30d3\u30c3\u30c8\u6f14\u7b97\u3068\u547c\u3070\u308c\u3066\u3044\u307e\u3059\u3002\u4f8b\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">var variable_1 = 20;\n\nvar variable_2 = 50;\n\nconsole.log(variable_1 | variable_2) \/\/ display the result of variable_1 OR variable_2<\/code><\/pre>\n<p>\u30aa\u30da\u30e9\u30f3\u30c9\u3092\u30d0\u30a4\u30ca\u30ea\u306b\u5909\u63db\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">20 = 010100\n\n50 = 110010<\/code><\/pre>\n<p>OR\u6f14\u7b97\u306f\u3001\u3069\u3061\u3089\u304b\u306e\u30d3\u30c3\u30c8\u304c1\u306e\u3068\u304d\u306b\u771f\uff081\uff09\u3092\u8fd4\u3059\u306e\u3067\u3001\u8868\u793a\u3055\u308c\u308b\u6bd4\u8f03\u5024\u306f\u300c110110\u300d\u307e\u305f\u306f\u300c53\u300d\u3068\u306a\u308a\u307e\u3059\u3002JavaScript\u3067\u306f\u3001\u30aa\u30da\u30e9\u30f3\u30c9\u306b\u304a\u3044\u3066\u3001\u30d6\u30fc\u30ea\u30a2\u30f3\u306e\u5024\u304c0\u307e\u305f\u306f1\u3067\u3042\u308b\u6f14\u7b97\u3092\u8ad6\u7406\u6f14\u7b97\u5b50\u3068\u547c\u3073\u307e\u3059\u3002JavaScript\u306e\u8ad6\u7406\u6f14\u7b97\u5b50\u306f\u3001\u300c<code>&&<\/code>\uff08\u8ad6\u7406AND\uff09\u300d\u3001\u300c<code>||<\/code>\uff08\u8ad6\u7406OR\uff09\u300d\u3001\u300c<code>!<\/code>\uff08\u8ad6\u7406NOT\uff09\u300d\u3067\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">var variable_1;\n\nvar variable_2;\n\nvariable _1 = (6 &gt; 5); \/\/ sets variable_1 to true or 1\n\nvariable_2 = (7 &lt;= 6); \/\/ sets variable_2 to false or 0\n\nConsole.log(variable_1 && variable_2); \/\/ displays 0<\/code><\/pre>\n<h2>\u95a2\u6570\u3068\u30e1\u30bd\u30c3\u30c9<\/h2>\n<p>\u95a2\u6570\u306f\u3001JavaScript\u306e\u4e3b\u529b\u6a5f\u80fd\u3067\u3059\u3002\u95a2\u6570\u306f\u3001\u7279\u5b9a\u306e\u30bf\u30b9\u30af\u3092\u5b9f\u884c\u3059\u308b\u30b3\u30fc\u30c9\u306e\u584a\u3067\u3059\u3002\u4ed6\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3067\u30d7\u30ed\u30b7\u30fc\u30b8\u30e3\u3084\u30b5\u30d6\u30eb\u30fc\u30c1\u30f3\u306b\u6163\u308c\u89aa\u3057\u3093\u3067\u3044\u308b\u65b9\u306a\u3089\u3001\u3059\u3050\u306b\u95a2\u6570\u3092\u7406\u89e3\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002\u95a2\u6570\u306f\u6b21\u306e\u3088\u3046\u306a\u69cb\u6587\u3067\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">function function_name(parameter list) {\n\n    \/\/ tasks to be performed\n\n}<\/code><\/pre>\n<p>\u95a2\u6570\u306f\u5b9a\u7fa9\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001<code>()<\/code>\u3092\u4f7f\u3063\u3066\u547c\u3073\u51fa\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>$()<\/h3>\n<p><code>$()<\/code>\u95a2\u6570\u306f\u3001\u4e0a\u8ff0\u3057\u305f\u3088\u3046\u306b\u3001HTML DOM\u306e\u7279\u5b9a\u306e\u8981\u7d20\u306eID\u3092\u8fd4\u3059\u3001getElementByID\u30e1\u30bd\u30c3\u30c9\u306e\u7701\u7565\u5f62\u3067\u3059\u3002\u3053\u306e\u95a2\u6570\u306f\u3001\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u5185\u306e\u8981\u7d20\u3092\u64cd\u4f5c\u3059\u308b\u969b\u306b\u3088\u304f\u4f7f\u308f\u308c\u307e\u3059\u3002<code>$()<\/code>\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u3088\u308a\u77ed\u304f\u3001\u3088\u308a\u52b9\u7387\u7684\u306aJavaScript\u306e\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u5178\u578b\u4f8b\u304c\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">document.getElementByID(\"element_id\")\n\n$() method:\n\n$(\"element_id\")<\/code><\/pre>\n<h3>\u95a2\u6570 VS \u30e1\u30bd\u30c3\u30c9<\/h3>\n<p>\u95a2\u6570\u306f\u30bf\u30b9\u30af\u3092\u5b9f\u884c\u3059\u308b\u3082\u306e\u3067\u3001\u30e1\u30bd\u30c3\u30c9\u306f\u95a2\u6570\u306e\u5b9a\u7fa9\u3092\u542b\u3080\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3067\u3059\u3002\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u305f\u3081\u306e\u69cb\u6587\u306f\u3001<code>object.function()<\/code>\u3067\u3059\u3002\u95a2\u6570\u306f\u81ea\u5df1\u5b8c\u7d50\u578b\u3067\u3001\u30e1\u30bd\u30c3\u30c9\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u95a2\u9023\u4ed8\u3051\u3089\u308c\u307e\u3059\u3002\u4e0a\u306e\u4f8b\u3067\u306f\u3001<code>document.getElementByID(\"element_id\")<\/code>\u3068\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8(<code>document<\/code>)\u3068\u3001\u305d\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u95a2\u9023\u3059\u308b\u30d7\u30ed\u30d1\u30c6\u30a3(<code>getElementbyID()<\/code>)\u3092\u53c2\u7167\u3057\u3066\u3044\u307e\u3059\u3002JavaScript\u306b\u306f2\u7a2e\u985e\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9<\/li>\n<li><span style=\"font-family: Roboto, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;font-size: 1rem\">\u9759\u7684\u30e1\u30bd\u30c3\u30c9<\/span><\/li>\n<\/ul>\n<p>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3001\u3053\u308c\u3092\u64cd\u4f5c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u5225\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30e1\u30bd\u30c3\u30c9\u307e\u305f\u306f\u9759\u7684\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u9759\u7684\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3067\u306f\u306a\u304f\u3001\u30af\u30e9\u30b9\u306b\u95a2\u9023\u3059\u308b\u8ad6\u7406\u3092\u542b\u307f\u307e\u3059\u3002\u9759\u7684\u30e1\u30bd\u30c3\u30c9\u3092\u4f5c\u6210\u3059\u308b\u306b\u306f\u3001\u95a2\u6570\u5b9a\u7fa9\u306e\u524d\u306b static \u3068\u3044\u3046\u5358\u8a9e\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u9759\u7684\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u9759\u7684\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u306e\u307f\u30a2\u30af\u30bb\u30b9\u3067\u304d\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u306f\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n<h2>JavaScript\u306ePromise<\/h2>\n<p>Promise\u3068\u306f\u3001<a href=\"https:\/\/www.freecodecamp.org\/news\/javascript-es6-promises-for-beginners-resolve-reject-and-chaining-explained\/\">\u5c06\u6765\u306b\u7279\u5b9a\u306e\u7d50\u679c\u3092\u3082\u305f\u3089\u3059<\/a>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u3053\u3068\u3067\u3059\u3002JavaScript\u306e\u7528\u8a9e\u3067\u306f\u3001Promise\u306f\u30b3\u30fc\u30c9\u306e\u300c\u30d7\u30ed\u30c7\u30e5\u30fc\u30b9\u300d\u3068\u300c\u30b3\u30f3\u30b7\u30e5\u30fc\u30e0\u300d\u3068\u547c\u3070\u308c\u307e\u3059\u3002\u95a2\u6570\u306f\u3001\u5b8c\u4e86\u307e\u3067\u306b\u4e0d\u7279\u5b9a\u304b\u3064<a href=\"https:\/\/kinqsta.com\/blog\/apm-tools\/#why-you-should-be-using-an-apm-tool\">\u591a\u5927\u306a\u6642\u9593<\/a>\u3092\u8981\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u30b3\u30fc\u30c9\u306e\u30b3\u30f3\u30b7\u30e5\u30fc\u30e0\u3068\u306a\u308b\u3068\u3001\u975e\u540c\u671f\u306e\u300c\u30d7\u30ed\u30c7\u30e5\u30fc\u30b9\u300d\u30b3\u30fc\u30c9\u306e\u7d50\u679c\u3092\u5f85\u3063\u3066\u304b\u3089\u3001\u305d\u306e\u95a2\u6570\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002\u30d7\u30ed\u30c7\u30e5\u30fc\u30b9\u30b3\u30fc\u30c9\u3068\u30b3\u30f3\u30b7\u30e5\u30fc\u30e0\u30b3\u30fc\u30c9\u306e\u95a2\u4fc2\u3092\u5b9a\u7fa9\u3059\u308b\u306e\u304cPromise\u3067\u3059\u3002Promise\u306b\u306f\u300c\u4fdd\u7559\u300d\u3001\u300c\u5c65\u884c\u300d\u3001\u300c\u62d2\u5426\u300d\u306e3\u3064\u306e\u72b6\u614b\u304c\u3042\u308a\u307e\u3059\u3002Promise\u306e\u5b9a\u7fa9\u3067\u306f\u3001\u300cresolve\u300d\u3068\u300creject\u300d\u306e2\u3064\u306e\u5f15\u6570\u304c\u6307\u5b9a\u3055\u308c\u307e\u3059\u3002\u300c\u4fdd\u7559\u300d\u306fPromise\u306e\u521d\u671f\u72b6\u614b\u3067\u3001Promise\u304c\u300c\u5c65\u884c\u300d\u3055\u308c\u3066\u3082\u300c\u62d2\u5426\u300d\u3055\u308c\u3066\u3082\u3044\u306a\u3044\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u300c\u5c65\u884c\u300d\u306f\u3001Promise\u304c\u89e3\u6c7a\u3055\u308c\u305f\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u300c\u62d2\u5426\u300d\u306f\u3001\u6587\u5b57\u901a\u308a\u3001\u305d\u306ePromise\u304c\u62d2\u5426\u3055\u308c\u305f\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u4fdd\u7559\u72b6\u614b\u3067\u306a\u304f\u306a\u3063\u305fPromise\u306f\u3001\u89e3\u6c7a\u6e08\u307f\u3068\u307f\u306a\u3055\u308c\u307e\u3059\u3002Promise\u3092\u4f5c\u6210\u3059\u308b\u69cb\u6587\u306f\u3001\u4f8b\u3048\u3070\u3001\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<pre><code class=\"language-javascript\">var newPromise = new Promise(\n\n    function(resolve, reject) {\n\n        \/\/ condition to be tested\n\n    }\n\n)<\/code><\/pre>\n<h2>JavaScript\u306e\u30af\u30ed\u30fc\u30b8\u30e3<\/h2>\n<p>\u30af\u30ed\u30fc\u30b8\u30e3\u306f\u3001\u305d\u308c\u307b\u3069\u8907\u96d1\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001<a href=\"https:\/\/www.tutorialsteacher.com\/javascript\/closure-in-javascript\">\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\u304c\u56f0\u60d1<\/a>\u3057\u304c\u3061\u306aJavaScript\u306e\u6a5f\u80fd\u3067\u3059\u3002JavaScript\u3067\u306f\u3001\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u4f7f\u3063\u3066\u3001\u5165\u308c\u5b50\u306b\u306a\u3063\u305f\u95a2\u6570\u306e\u64cd\u4f5c\u306b\u5bfe\u51e6\u3067\u304d\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u4f7f\u3046\u3068\u3001\u901a\u5e38\u304b\u3089\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u306a\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306b\u52a0\u3048\u3001\u5185\u5074\u306e\u95a2\u6570\u304c\u89aa\u95a2\u6570\u306e\u4e2d\u8eab\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u3061\u306a\u307f\u306b\u3001\u5185\u5074\u306e\u95a2\u6570\u304c\u5916\u5074\u306e\u95a2\u6570\u306e\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u3059\u304c\u3001\u305d\u306e\u9006\u306f\u3067\u304d\u307e\u305b\u3093\u306e\u3067\u3054\u6ce8\u610f\u304f\u3060\u3055\u3044\u3002\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u7406\u89e3\u3059\u308b\u306b\u306f\u3001\u30b9\u30b3\u30fc\u30d7\u306e\u57fa\u672c\u3092\u304a\u3055\u3048\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u95a2\u6570\u5185\u306e\u5909\u6570\u306f\u3001\u901a\u5e38\u3001\u305d\u306e\u95a2\u6570\u304b\u3089\u3057\u304b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\u3002\u307e\u305f\u3001\u30b9\u30b3\u30fc\u30d7\u306f\u3001\u305d\u306e\u95a2\u6570\u306b\u5bfe\u3057\u3066\u6c4e\u7528\u7684\u306b\u4f5c\u3089\u308c\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u547c\u3073\u51fa\u3057\u3054\u3068\u306b\u4f5c\u3089\u308c\u307e\u3059\u3002\u30af\u30ed\u30fc\u30b8\u30e3\u306f\u3001\u300c\u95a2\u6570\u5b8c\u4e86\u306b\u4f34\u3044\u5909\u6570\u304c\u6d88\u3048\u3066\u3057\u307e\u3046\u300d\u3068\u3044\u3046\u7279\u5fb4\u306b\u5bfe\u51e6\u3059\u308b\u305f\u3081\u306e\u3082\u306e\u3067\u3059\u3002\u307e\u305f\u3001\u95a2\u6570\u5b9f\u884c\u5f8c\u3067\u3082\u3001\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u6b21\u306e\u3088\u3046\u306a\u30b3\u30fc\u30c9\u306e\u4f8b\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre><code class=\"language-javascript\">function outer_closure_function() {\n\n    var outer_variable = \"we want to keep the outer variable\";\n\n    var inner_closure_function = function() {\n\n        inner_variable = \"use closures because\"\n\n        console.log(inner_variable + \" \" + outer_variable);\n\n    }\n\n    return inner_closure_function;\n\n}\n\nvar closure = outer_closure_function(); \/\/ returns a reference to inner_closure_function\n\nclosure(); \/\/ displays \"use closures because we want to keep the outer variable\"<\/code><\/pre>\n<p>\u30af\u30ed\u30fc\u30b8\u30e3\u306e\u4ed5\u7d44\u307f\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u3001\u30b3\u30fc\u30c9\u30921\u884c\u305a\u3064\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u307e\u305a\u3001\u5916\u5074\u306e\u95a2\u6570\u3092\u5b9a\u7fa9\u3057\u3001\u305d\u306e\u95a2\u6570\u306b\u95a2\u9023\u3059\u308b\u5909\u6570\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u6b21\u306b\u3001\u5185\u5074\u306e\u95a2\u6570\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u91cd\u8981\u306a\u306e\u306f\u3001\u5185\u5074\u306e\u95a2\u6570\u3092\u547c\u3073\u51fa\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u3067\u3059\u2500\u5b9a\u7fa9\u3057\u305f\u3060\u3051\u306e\u72b6\u614b\u3067\u3059\u3002\u6b21\u306b\u3001\u5185\u5074\u306e\u95a2\u6570\u3092\u8fd4\u3059\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u3092\u8a18\u8ff0\u3057\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u3053\u308c\u304c\u8fd4\u3059\u306e\u306f\u5185\u5074\u306e\u95a2\u6570\u306e\u7d50\u679c\u3067\u306f\u306a\u304f\u3001\u95a2\u6570\u305d\u306e\u3082\u306e\u3067\u3059\u3002\u3064\u307e\u308a\u3001\u30af\u30ed\u30fc\u30b8\u30e3\u3092<code>outer_closure_function<\/code>\u3068\u5b9a\u7fa9\u3057\u3066\u3082\u3001\u5185\u5074\u306e\u95a2\u6570\u306e\u5b9f\u969b\u306e\u5024\u3092\u8fd4\u3059\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u4ee3\u308f\u308a\u306b\u3001<code>inner_closure_function<\/code>\u306e\u53c2\u7167\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u6587\u306e\u5f8c\u306b\u5916\u5074\u306e\u95a2\u6570\u304c\u5b8c\u6210\u3057\u3066\u3001\u6b63\u5f0f\u306b\u306f<code>outer_variable<\/code>\u304c\u5b58\u5728\u3057\u306a\u304f\u306a\u3063\u3066\u3044\u308b\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001\u3053\u306e\u3088\u3046\u306a\u6319\u52d5\u306b\u306a\u308a\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u3053\u308c\u306f\u3001<code>inner_closure_function<\/code>\u306e\u53c2\u7167\u306e\u4e2d\u306b\u307e\u3060\u5b58\u5728\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3067\u3001\u6700\u5f8c\u306e\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u3067\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u547c\u3073\u51fa\u3059\u3068\u3001\u671f\u5f85\u901a\u308a\u306e\u7d50\u679c\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u30af\u30ed\u30fc\u30b8\u30e3\u306e\u7406\u89e3\u3092\u6df1\u3081\u308b\u306b\u306f\u3001\u81ea\u5206\u3067<a href=\"https:\/\/kinqsta.com\/jp\/blog\/best-text-editors\/\">\u30b5\u30f3\u30d7\u30eb\u3092\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3057\u3066\u307f\u308b<\/a>\u306e\u304c\u4e00\u756a\u3067\u3059\u3002\u6b63\u3057\u304f\u7406\u89e3\u3067\u304d\u308b\u307e\u3067\u306b\u306f\u3001\u6642\u9593\u304c\u304b\u304b\u308a\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u66f4\u65b0\u3068\u30c6\u30b9\u30c8\u3092\u7e70\u308a\u8fd4\u3059\u3053\u3068\u3067\u3001\u30a2\u30b8\u30e3\u30a4\u30eb\u958b\u767a\u306e\u30de\u30a4\u30f3\u30c9\u30bb\u30c3\u30c8\u3092\u624b\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u306f\u305a\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u305d\u306e\u969b\u306b\u306f\u3001<a href=\"https:\/\/kinqsta.com\/jp\/ebooks\/wordpress\/how-to-secure-wordpress-site\/\">\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3<\/a>\u3082\u304a\u5fd8\u308c\u7121\u304f\u3002JavaScript\u306f\u3001<a href=\"https:\/\/kinqsta.com\/blog\/sql-injection\/\">SQL\u3084LDAP\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3<\/a>\u3001XSS\u653b\u6483\u306a\u3069\u3001\u6df1\u523b\u306a\u554f\u984c\u306b\u5bfe\u3057\u3066\u8106\u5f31\u306b\u306a\u308a\u304c\u3061\u3067\u3059\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u3082\u3057\u3001Wix\u3084Square\u3068\u3044\u3063\u305f\u3059\u3050\u306b\u4f7f\u3048\u308b\u30b5\u30fc\u30d3\u30b9\u3067\u306f\u3067\u304d\u306a\u3044\u3088\u3046\u306a\u3053\u3068\u3092\u3001\u81ea\u5206\u306e\u30b5\u30a4\u30c8\u3067\u5b9f\u88c5\u3057\u305f\u3044\u306e\u3067\u3042\u308c\u3070\u3001JavaScript\u3092\u5b66\u7fd2\u3057\u3066\u307f\u308b\u306e\u304c\u3044\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002JavaScript\u3067\u306f\u3001\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3084<a href=\"https:\/\/kinqsta.com\/jp\/blog\/application-performance-monitoring\/\">\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/a>\u3092\u30b7\u30f3\u30d7\u30eb\u304b\u3064\u7c21\u5358\u306b\u5b66\u3076\u3053\u3068\u304c\u3067\u304d\u3001\u5b66\u7fd2\u30d7\u30ed\u30bb\u30b9\u306b\u591a\u304f\u306e\u6642\u9593\u3092\u8cbb\u3084\u3059\u3053\u3068\u306a\u304f\u3001\u30b5\u30a4\u30c8\u306b\u9ad8\u5ea6\u306b\u30a4\u30f3\u30bf\u30e9\u30af\u30c6\u30a3\u30d6\u306a\u6a5f\u80fd\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001JavaScript\u306f\u3001<a href=\"https:\/\/kinqsta.com\/developer-roles\/coding-skills-at-kinsta\/\">\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u306e\u30b9\u30ad\u30eb\u30a2\u30c3\u30d7<\/a>\u3068\u3044\u3046\u610f\u5473\u3067\u3082\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30b5\u30a4\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3088\u3046\u3068\u3057\u305f\u3068\u3053\u308d\u3001Java\u306e\u30a2\u30c3\u30d7 &#8230;<\/p>\n","protected":false},"author":178,"featured_media":33595,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kinsta_gated_content":false,"_kinsta_gated_content_redirect":"","footnotes":""},"tags":[],"topic":[778],"class_list":["post-33594","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","topic-javascript-tutorials"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.6 (Yoast SEO v24.6) - 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property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JavaScript\u3068\u306f\uff1f\u4e16\u754c\u3067\u6700\u3082\u666e\u53ca\u3057\u3066\u3044\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u8a00\u8a9e\u3092\u7406\u89e3\u3057\u3088\u3046\" \/>\n<meta property=\"og:description\" content=\"\u4eca\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001JavaScript\u3068\u306f\u4f55\u304b\u3001\u305d\u306e\u4e3b\u306a\u6a5f\u80fd\u3084\u5229\u70b9\u3001Java\u3068\u306e\u9055\u3044\u306a\u3069\u3092\u8a73\u3057\u304f\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u30b3\u30fc\u30c9\u306e\u5b9f\u4f8b\u3092\u7528\u3044\u3066\u3001JS\u306e\u4e16\u754c\u306b\u63a2\u6c42\u8e0f\u307f\u8fbc\u3093\u3067\u307f\u307e\u3057\u3087\u3046\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/kinqsta.com\/jp\/blog\/what-is-javascript\/\" \/>\n<meta property=\"og:site_name\" content=\"Kinsta\u00ae\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Kinsta-Japan-334616080691171\/\" \/>\n<meta property=\"article:published_time\" content=\"2022-01-06T17:08:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-01T19:49:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/kinqsta.com\/jp\/wp-content\/uploads\/sites\/6\/2021\/12\/what-is-javascript.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1460\" \/>\n\t<meta property=\"og:image:height\" content=\"730\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Nahla Davies\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:description\" content=\"\u4eca\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001JavaScript\u3068\u306f\u4f55\u304b\u3001\u305d\u306e\u4e3b\u306a\u6a5f\u80fd\u3084\u5229\u70b9\u3001Java\u3068\u306e\u9055\u3044\u306a\u3069\u3092\u8a73\u3057\u304f\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u30b3\u30fc\u30c9\u306e\u5b9f\u4f8b\u3092\u7528\u3044\u3066\u3001JS\u306e\u4e16\u754c\u306b\u63a2\u6c42\u8e0f\u307f\u8fbc\u3093\u3067\u307f\u307e\u3057\u3087\u3046\u3002\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/kinqsta.com\/jp\/wp-content\/uploads\/sites\/6\/2021\/12\/what-is-javascript.jpg\" \/>\n<meta name=\"twitter:creator\" content=\"@Kinsta_JP\" \/>\n<meta name=\"twitter:site\" content=\"@Kinsta_JP\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"Nahla Davies\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"4\u5206\" \/>\n<script 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