From e9eae2d4257e8e561a6234c9a0baf1bd1166f707 Mon Sep 17 00:00:00 2001
From: Masahiro FUJIMOTO <mfujimot@gmail.com>
Date: Sun, 9 Jan 2022 16:15:16 +0900
Subject: FocusEvent 関係のインターフェイス・イベントの記事を変換準備
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+---
+title: 'Element: focusin イベント'
+slug: Web/API/Element/focusin_event
+tags:
+  - API
+  - DOM
+  - Element
+  - Event
+  - FocusEvent
+  - Reference
+  - focusin
+  - イベント
+translation_of: Web/API/Element/focusin_event
+---
+<div>{{APIRef}}</div>
+
+<p><strong><code>focusin</code></strong> イベントは、要素がフォーカスを受け取ろうとしているときに発生します。このイベントと {{domxref("Element/focus_event", "focus")}} との主な違いは、 <code>focusin</code> がバブリングを行うのに対し <code>focus</code> は行わないことです。</p>
+
+<p><code>focusin</code> の反対は {{domxref("Element/focusout_event", "focusout")}} です。</p>
+
+<table class="properties">
+ <tbody>
+  <tr>
+   <th scope="row">バブリング</th>
+   <td>あり</td>
+  </tr>
+  <tr>
+   <th scope="row">キャンセル可能</th>
+   <td>いいえ</td>
+  </tr>
+  <tr>
+   <th scope="row">インターフェイス</th>
+   <td>{{DOMxRef("FocusEvent")}}</td>
+  </tr>
+  <tr>
+   <th scope="row">イベントハンドラープロパティ</th>
+   <td>{{domxref("GlobalEventHandlers/onfocusin", "onfocusin")}}</td>
+  </tr>
+  <tr>
+   <th scope="row">同期 / 非同期</th>
+   <td>同期</td>
+  </tr>
+  <tr>
+   <th scope="row">Composed</th>
+   <td>はい</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Examples" name="Examples">例</h2>
+
+<h3 id="Live_example" name="Live_example">ライブデモ</h3>
+
+<h4 id="HTML">HTML</h4>
+
+<pre class="brush: html">&lt;form id="form"&gt;
+  &lt;input type="text" placeholder="text input"&gt;
+  &lt;input type="password" placeholder="password"&gt;
+&lt;/form&gt;</pre>
+
+<h4 id="JavaScript">JavaScript</h4>
+
+<pre class="brush: js">const form = document.getElementById('form');
+
+form.addEventListener('focusin', (event) =&gt; {
+  event.target.style.background = 'pink';
+});
+
+form.addEventListener('focusout', (event) =&gt; {
+  event.target.style.background = '';
+});</pre>
+
+<h4 id="Result" name="Result">結果</h4>
+
+<p>{{EmbedLiveSample("Live_example", '100%', '50px')}}</p>
+
+<h2 id="Specifications" name="Specifications">仕様書</h2>
+
+<table class="standard-table">
+ <thead>
+  <tr>
+   <th scope="col">仕様書</th>
+   <th scope="col">状態</th>
+   <th scope="col">備考</th>
+  </tr>
+ </thead>
+ <tbody>
+  <tr>
+   <td>{{SpecName("UI Events", "#event-type-focusin")}}</td>
+   <td>{{Spec2("UI Events")}}</td>
+   <td>Added info that this event is composed.</td>
+  </tr>
+  <tr>
+   <td>{{SpecName("DOM3 Events", "#event-type-focusin")}}</td>
+   <td>{{Spec2("DOM3 Events")}}</td>
+   <td>初回定義</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility" name="Browser_compatibility">ブラウザーの対応</h2>
+
+<p>{{Compat("api.Element.focusin_event")}}</p>
+
+<h2 id="See_also" name="See_also">関連情報</h2>
+
+<ul>
+ <li>関連イベント: {{domxref("Element/blur_event", "blur")}}, {{domxref("Element/focus_event", "focus")}}, {{domxref("Element/focusout_event", "focusout")}}</li>
+</ul>
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