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+---
+title: GlobalEventHandlers.ondragstart
+slug: Web/API/GlobalEventHandlers/ondragstart
+tags:
+  - API
+  - HTML DOM
+  - Reference
+  - drag and drop
+translation_of: Web/API/GlobalEventHandlers/ondragstart
+---
+<div>{{ApiRef("HTML DOM")}}</div>
+
+<p>{{event("dragstart")}} イベントの {{domxref("GlobalEventHandlers","global event handler")}} 。</p>
+
+<h2 id="構文">構文</h2>
+
+<pre class="syntaxbox notranslate">var <var>dragstartHandler</var> = <var>targetElement</var>.ondragstart;
+</pre>
+
+<h3 id="返り値">返り値</h3>
+
+<dl>
+ <dt><code>dragstartHandler</code></dt>
+ <dd>要素 <code>targetElement</code> の <em>dragstart</em> イベントハンドラ。</dd>
+</dl>
+
+<h2 id="例">例</h2>
+
+<p>この例では、 {{domxref("GlobalEventHandlers.ondragstart","ondragstart")}} 属性ハンドラを使用して、要素 {{event("dragstart")}} イベントハンドラを設定する方法を示します。</p>
+
+<pre class="brush: js notranslate">&lt;!DOCTYPE html&gt;
+&lt;html lang=en&gt;
+&lt;title&gt;Examples of using the ondrag Global Event Attribute&lt;/title&gt;
+&lt;meta content="width=device-width"&gt;
+&lt;style&gt;
+  div {
+    margin: 0em;
+    padding: 2em;
+  }
+  #source {
+    color: blue;
+    border: 1px solid black;
+  }
+  #target {
+    border: 1px solid black;
+  }
+&lt;/style&gt;
+&lt;/head&gt;
+&lt;script&gt;
+function drag_handler(ev) {
+ console.log("Drag");
+}
+
+function dragstart_handler(ev) {
+ console.log("dragStart");
+ ev.dataTransfer.setData("text", ev.target.id);
+}
+
+function drop_handler(ev) {
+ console.log("Drop");
+ ev.currentTarget.style.background = "lightyellow";
+
+ ev.preventDefault();
+ var data = ev.dataTransfer.getData("text");
+ ev.target.appendChild(document.getElementById(data));
+}
+
+function dragover_handler(ev) {
+ console.log("dragOver");
+ ev.preventDefault();
+}
+&lt;/script&gt;
+&lt;body&gt;
+&lt;h1&gt;Examples of &lt;code&gt;ondrag&lt;/code&gt;, &lt;code&gt;ondrop&lt;/code&gt;, &lt;code&gt;ondragstart&lt;/code&gt;, &lt;code&gt;ondragover&lt;/code&gt;&lt;/h1&gt;
+ &lt;div&gt;
+   &lt;p id="source" ondrag="drag_handler(event);" ondragstart="dragstart_handler(event);" draggable="true"&gt;
+     Select this element, drag it to the Drop Zone and then release the selection to move the element.&lt;/p&gt;
+ &lt;/div&gt;
+ &lt;div id="target" ondrop="drop_handler(event);" ondragover="dragover_handler(event);"&gt;Drop Zone&lt;/div&gt;
+&lt;/body&gt;
+&lt;/html&gt;
+</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("HTML WHATWG", "indices.html#ix-handler-ondragstart", "ondragstart")}}</td>
+   <td>{{Spec2("HTML WHATWG")}}</td>
+   <td></td>
+  </tr>
+  <tr>
+   <td>{{SpecName("HTML5.1", "index.html#ix-handler-ondragstart", "ondragstart")}}</td>
+   <td>{{Spec2("HTML5.1")}}</td>
+   <td>初回定義</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.GlobalEventHandlers.ondragstart")}}</p>
+
+<h2 id="関連項目">関連項目</h2>
+
+<ul>
+ <li>{{event("dragstart")}}</li>
+</ul>