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---
title: IDBObjectStore.getKey()
slug: Web/API/IDBObjectStore/getKey
translation_of: Web/API/IDBObjectStore/getKey
---
<p>{{ APIRef("IndexedDB") }}</p>
<div>
<p>La méthode <strong><code>getKey()</code></strong> de l'interface {{domxref("IDBObjectStore")}} retourne un objet {{domxref("IDBRequest")}}, et, dans un <em>thread</em> séparé, retourne la clé sélectionnée par la requête spécifiée. Cela permet de retrouver un enregistrement spécifique depuis un espace de stockage déterminé.</p>
</div>
<p>Si la clé a bien été retrouvée, alors un clone structuré (une copie conforme) sera créée et servira comme résultat à l'objet de requête.</p>
<p>{{AvailableInWorkers}}</p>
<h2 id="Syntax">Syntax</h2>
<pre class="syntaxbox">var request = <em>objectStore</em>.getKey(<em>key</em>);</pre>
<h3 id="Parameters">Parameters</h3>
<dl>
<dt><em>key</em></dt>
<dd>La clé ou l'intervale de clé qui identifie l'enregistrement à retrouver.</dd>
</dl>
<h3 id="Return_Value">Return Value</h3>
<p>An {{domxref("IDBRequest")}} object on which subsequent events related to this operation are fired.</p>
<h3 id="Exceptions">Exceptions</h3>
<p>This method may raise a {{domxref("DOMException")}} of one of the following types:</p>
<table class="standard-table">
<thead>
<tr>
<th scope="col">Exception</th>
<th scope="col">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>TransactionInactiveError</code></td>
<td>This {{domxref("IDBObjectStore")}}'s transaction is inactive.</td>
</tr>
<tr>
<td><code>DataError</code></td>
<td>
<p>The key or key range provided contains an invalid key.</p>
</td>
</tr>
<tr>
<td><code>InvalidStateError</code></td>
<td>The {{domxref("IDBObjectStore")}} has been deleted or removed.<br>
</td>
</tr>
</tbody>
</table>
<h2 id="Example">Example</h2>
<pre class="brush: js">let openRequest = indexedDB.open("telemetry");
openRequest.onsuccess = (event) => {
let db = event.target.result;
let store = db.transaction("netlogs").objectStore("netlogs");
let today = new Date();
let yesterday = new Date(today);
yesterday.setDate(today.getDate() - 1);
let request = store.getKey(IDBKeyRange(yesterday, today));
request.onsuccess = (event) => {
let when = event.target.result;
alert("The 1st activity in last 24 hours was occurred at " + when);
};
};</pre>
<h2 id="Specifications">Specifications</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 2', '#dom-idbobjectstore-getkey', 'getKey()')}}</td>
<td>{{Spec2('IndexedDB 2')}}</td>
<td>Initial definition</td>
</tr>
</tbody>
</table>
<h2 id="Browser_compatibility">Browser compatibility</h2>
<div>{{CompatibilityTable}}</div>
<div id="compat-desktop">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Chrome</th>
<th>Firefox (Gecko)</th>
<th>Internet Explorer</th>
<th>Opera</th>
<th>Safari (WebKit)</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatChrome(58)}}</td>
<td>{{CompatGeckoDesktop("51.0")}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatOpera(45)}}</td>
<td>{{CompatUnknown}}</td>
</tr>
<tr>
<td>Available in workers</td>
<td>{{CompatChrome(58)}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatOpera(45)}}</td>
<td>{{CompatUnknown}}</td>
</tr>
</tbody>
</table>
</div>
<div id="compat-mobile">
<table class="compat-table">
<tbody>
<tr>
<th>Feature</th>
<th>Android Webview</th>
<th>Chrome for Android</th>
<th>Firefox Mobile (Gecko)</th>
<th>IE Phone</th>
<th>Opera Mobile</th>
<th>Safari Mobile</th>
</tr>
<tr>
<td>Basic support</td>
<td>{{CompatChrome(58)}}</td>
<td>{{CompatChrome(58)}}</td>
<td>{{CompatGeckoMobile("51.0")}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatOperaMobile(45)}}</td>
<td>{{CompatUnknown}}</td>
</tr>
<tr>
<td>Available in workers</td>
<td>{{CompatChrome(58)}}</td>
<td>{{CompatChrome(58)}}</td>
<td>{{CompatVersionUnknown}}</td>
<td>{{CompatUnknown}}</td>
<td>{{CompatOperaMobile(45)}}</td>
<td>{{CompatUnknown}}</td>
</tr>
</tbody>
</table>
</div>
<h2 id="See_also">See also</h2>
<ul>
<li><a href="/en-US/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="https://mdn.github.io/to-do-notifications/">view example live</a>.)</li>
</ul>
|
