files/ja/web/api/idbdatabase/version/index.html


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---
title: IDBDatabase.version
slug: Web/API/IDBDatabase/version
tags:
  - Database
  - IDBDatabase
  - IndexedDB
  - Property
  - Storage
  - version
translation_of: Web/API/IDBDatabase/version
---
<p>{{ APIRef("IDBDatabase") }}</p>
<div>
 <p><code>{{domxref("IDBDatabase")}}インターフェイスのversion</code>プロパティ は、接続しているデータベースのバージョンを含む<a href="/ja/docs/NSPR_API_Reference/Long_Long_%2864-bit%29_Integers">64-bit integer</a>です。データベースを初めて生成した時、この属性は空文字です。</p>
</div>
<h2 id="構文">構文</h2>
<pre class="brush: js">db.version</pre>
<h3 id="値">値</h3>
<p>接続しているデータベースのバージョンを含む整数値。</p>
<h2 id="例">例</h2>
<pre class="brush: js;highlight:[16]">// Let us open our database
var DBOpenRequest = window.indexedDB.open("toDoList", 4);

// these two event handlers act on the database being opened successfully, or not
DBOpenRequest.onerror = function(event) {
  note.innerHTML += '&lt;li&gt;Error loading database.&lt;/li&gt;';
};

DBOpenRequest.onsuccess = function(event) {
  note.innerHTML += '&lt;li&gt;Database initialised.&lt;/li&gt;';

  // store the result of opening the database in the db variable. This is used a lot below
  db = DBOpenRequest.result;

  // This line will log the version of the connected database, which should be "4"
  console.log(db.version);
};</pre>
<h2 id="仕様">仕様</h2>
<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Status</th>
   <th scope="col">Comment</th>
  </tr>
  <tr>
   <td>{{SpecName('IndexedDB', '#widl-IDBDatabase-version', 'version')}}</td>
   <td>{{Spec2('IndexedDB')}}</td>
   <td> </td>
  </tr>
 </tbody>
</table>
<h2 id="Browser_compatibility" name="Browser_compatibility">ブラウザ実装状況</h2>

<p>{{Compat("api.IDBDatabase.version")}}</p>

<h2 id="関連情報">関連情報</h2>
<ul>
 <li><a href="/ja/docs/Web/API/IndexedDB_API/Using_IndexedDB">Using IndexedDB</a></li>
 <li>Starting transactions: {{domxref("IDBDatabase")}}</li>
 <li>Using transactions: {{domxref("IDBTransaction")}}</li>
 <li>Setting a range of keys: {{domxref("IDBKeyRange")}}</li>
 <li>Retrieving and making changes to your data: {{domxref("IDBObjectStore")}}</li>
 <li>Using cursors: {{domxref("IDBCursor")}}</li>
 <li>Reference example: <a class="external" href="https://github.com/mdn/to-do-notifications/tree/gh-pages">To-do Notifications</a> (<a class="external" href="http://mdn.github.io/to-do-notifications/">view example live</a>.)</li>
</ul>