From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:40:17 -0500
Subject: initial commit

---
 .../onloadstart/index.html                         | 61 ++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 files/ja/web/api/xmlhttprequesteventtarget/onloadstart/index.html

(limited to 'files/ja/web/api/xmlhttprequesteventtarget/onloadstart/index.html')

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+---
+title: XMLHttpRequestEventTarget.onloadstart
+slug: Web/API/XMLHttpRequestEventTarget/onloadstart
+tags:
+  - API
+  - Property
+  - Reference
+  - Web
+  - XMLHttpRequestEventTarget
+  - イベントハンドラ
+translation_of: Web/API/XMLHttpRequestEventTarget/onloadstart
+---
+<div>{{APIRef("XMLHttpRequest")}}</div>
+
+<p><strong><code>XMLHttpRequestEventTarget.onloadstart</code></strong> は、 {{domxref("XMLHttpRequest")}} トランザクションがデータ転送を開始するときに呼び出される関数です。</p>
+
+<h2 id="Syntax" name="Syntax">構文</h2>
+
+<pre class="syntaxbox notranslate"><em>XMLHttpRequest</em>.onloadstart = <em>callback</em>;</pre>
+
+<h3 id="値">値</h3>
+
+<ul>
+ <li><code><em>callback</em></code> は、トランザクションがデータ転送を開始したときに呼び出される関数です。</li>
+</ul>
+
+<h2 id="Example" name="Example">例</h2>
+
+<pre class="brush: js notranslate">var xmlhttp = new XMLHttpRequest(),
+  method = 'GET',
+  url = 'https://developer.mozilla.org/';
+
+xmlhttp.open(<em>method</em>, <em>url</em>, true);
+xmlhttp.onloadstart = function () {
+  console.log("Download underway");
+};
+xmlhttp.send();
+</pre>
+
+<h2 id="仕様">仕様</h2>
+
+<table class="standard-table">
+ <tbody>
+  <tr>
+   <th scope="col">仕様</th>
+   <th scope="col">ステータス</th>
+   <th scope="col">備考</th>
+  </tr>
+  <tr>
+   <td>{{SpecName('XMLHttpRequest', '#handler-xhr-onloadstart')}}</td>
+   <td>{{Spec2('XMLHttpRequest')}}</td>
+   <td>WHATWG living standard</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="ブラウザーの互換性">ブラウザーの互換性</h2>
+
+
+
+<p>{{Compat("api.XMLHttpRequestEventTarget.onloadstart")}}</p>
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