{"id":1743,"date":"2020-01-30T03:18:41","date_gmt":"2020-01-29T18:18:41","guid":{"rendered":"https:\/\/took.jp\/?p=1743"},"modified":"2020-06-16T10:11:42","modified_gmt":"2020-06-16T01:11:42","slug":"queryselector","status":"publish","type":"post","link":"https:\/\/took.jp\/tech-blog\/queryselector\/","title":{"rendered":"JavaScript\u306equerySelector\u304c\u4fbf\u5229"},"content":{"rendered":"<p>JavaScript\u3067DOM\u64cd\u4f5c\u3092\u884c\u3046\u969b\u306b\u306f\u3001<\/p>\n<p>document.getElementById\u3000\u3084<\/p>\n<p>document.getElementByClassName\u306a\u3069\u3092\u3088\u304f\u4f7f\u3046\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u3057\u304b\u3057\u3001document.querySelector\u304c\u3068\u3066\u3082\u4fbf\u5229\u3060\u3063\u305f\u305f\u3081\u3001\u7d39\u4ecb\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<h2>ID\u3092\u53d6\u5f97\u3059\u308b<\/h2>\n<pre class=\"wp-block-luxe-blocks-syntaxhighlighter line-numbers language-markup\"><code class=\"language-markup\">&lt;div id=\"test\"&gt;Sample&lt;\/div&gt;\r\n\r\n&lt;script&gt;\r\nconsole.log(document.getElementById('querySelectortest'));\r\nconsole.log(document.querySelector('[id=\"test\"]'));\r\nconsole.log(document.querySelector('#test'));\r\n&lt;\/script&gt;<\/code><\/pre>\n<p>quierySelector\u3092\u4f7f\u7528\u3059\u308c\u3070\u4e0a\u8a18\u306e\u3088\u3046\u306a\u65b9\u6cd5\u3067\u3082\u8a18\u8ff0\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3067\u3001\u90e8\u5206\u4e00\u81f4\u306b\u3088\u308b\u53d6\u5f97\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<pre class=\"wp-block-luxe-blocks-syntaxhighlighter line-numbers language-javascript\"><code class=\"language-javascript\">console.log([].slice.call(document.querySelectorAll('[id^=\"tes\"]')));\r\n<\/code><\/pre>\n<h2>Class\u3092\u53d6\u5f97\u3059\u308b<\/h2>\n<pre class=\"wp-block-luxe-blocks-syntaxhighlighter line-numbers language-markup\"><code class=\"language-markup\">&lt;div class=\"test\"&gt;Sample&lt;\/div&gt;\r\n\r\n&lt;script&gt;\r\nconsole.log([].slice.call(document.getElementsByClassName('test')));\r\nconsole.log([].slice.call(document.querySelectorAll('[class=\"test\"]')));\r\nconsole.log([].slice.call(document.querySelectorAll('.test')));\r\n&lt;\/script&gt;<\/code><\/pre>\n<p>Class\u306e\u5834\u5408\u306b\u306f\u3001querySelectorAll\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u3061\u3089\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u8907\u6570\u306e\u8981\u7d20\u304c\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\uff08id\u306e\u5834\u5408\u306f\u3001\u4e00\u610f\u306e\u305f\u3081\u3001\u8907\u6570\u53d6\u5f97\u3059\u308b\u5fc5\u8981\u304c\u306a\u304b\u3063\u305f\u3002\uff09<\/p>\n<p>\u307e\u305f\u3001\u53d6\u5f97\u3057\u305f\u8981\u7d20\u306f\u3001\u300c <strong>HTMLCollection <\/strong>\u300d\u3084\u300c<strong>Nodelist<\/strong>\u300d\u306e\u305f\u3081\u3001\u914d\u5217\u306b\u5909\u63db\u3059\u308b\u51e6\u7406\u3082\u52a0\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>ID\u3068\u540c\u69d8\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3067\u3001\u90e8\u5206\u4e00\u81f4\u306b\u3088\u308b\u53d6\u5f97\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<pre class=\"wp-block-luxe-blocks-syntaxhighlighter line-numbers language-javascript\"><code class=\"language-javascript\">console.log([].slice.call(document.querySelectorAll('[class^=\"tes\"]')));\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>JavaScript\u3067DOM\u64cd\u4f5c\u3092\u884c\u3046\u969b\u306b\u306f\u3001 document.getElementById\u3000\u3084 document.getElementByClassName\u306a\u3069\u3092\u3088\u304f\u4f7f\u3046\u3068\u601d\u3044\u307e\u3059\u3002 \u3057\u304b\u3057\u3001document.querySelector\u2026<\/p>\n","protected":false},"author":3,"featured_media":1812,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,66],"tags":[],"class_list":["post-1743","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-it","category-javascript"],"_links":{"self":[{"href":"https:\/\/took.jp\/tech-blog\/wp-json\/wp\/v2\/posts\/1743","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/took.jp\/tech-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/took.jp\/tech-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/took.jp\/tech-blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/took.jp\/tech-blog\/wp-json\/wp\/v2\/comments?post=1743"}],"version-history":[{"count":0,"href":"https:\/\/took.jp\/tech-blog\/wp-json\/wp\/v2\/posts\/1743\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/took.jp\/tech-blog\/wp-json\/wp\/v2\/media\/1812"}],"wp:attachment":[{"href":"https:\/\/took.jp\/tech-blog\/wp-json\/wp\/v2\/media?parent=1743"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/took.jp\/tech-blog\/wp-json\/wp\/v2\/categories?post=1743"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/took.jp\/tech-blog\/wp-json\/wp\/v2\/tags?post=1743"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}