---
title: extension.getBackgroundPage()
slug: Mozilla/Add-ons/WebExtensions/API/extension/getBackgroundPage
tags:
  - API
  - Add-ons
  - Extension
  - Extensions
  - Méthode
  - Non-standard
  - Reference
  - WebExtensions
  - getBackgroundPage
translation_of: Mozilla/Add-ons/WebExtensions/API/extension/getBackgroundPage
---
<div>{{AddonSidebar()}}</div>

<p>Alias de {{WebExtAPIRef("runtime.getBackgroundPage()")}}.</p>

<div class="note">
<p><strong>Note :</strong> Cette méthode ne peut pas être utilisée en mode Navigation privée - elle renvoie toujours un tableau vide. Pour plus d'informations, voir {{bug(1329304)}}.</p>
</div>

<h2 id="Syntaxe">Syntaxe</h2>

<pre class="brush: js">var page = browser.extension.getBackgroundPage()
</pre>

<h3 id="Paramètres">Paramètres</h3>

<p>Aucun</p>

<h3 id="Valeur_retournée">Valeur retournée</h3>

<p><code>object</code>. <a href="/fr/docs/Web/API/Window">Window</a> de la page d'arrière plan.</p>

<h2 id="Compatibilité_du_navigateur">Compatibilité du navigateur</h2>

<p>{{Compat("webextensions.api.extension.getBackgroundPage")}}</p>

<h2 id="Exemples">Exemples</h2>

<p>Supposons un  <a href="/fr/Add-ons/WebExtensions/Anatomy_of_a_WebExtension#Background_scripts">script d'arrière plan</a> définisse une fonction <code>foo()</code>:</p>

<pre class="brush: js">// background.js

function foo() {
  console.log("I'm defined in background.js");
}</pre>

<p>Un script exécuté dans un <a href="/fr/Add-ons/WebExtensions/Anatomy_of_a_WebExtension#Browser_actions_2">popup</a> peut appeler cette fonction directement comme ceci :</p>

<pre class="brush: js">// popup.js

var page = browser.extension.getBackgroundPage();
page.foo(); // -&gt; "I'm defined in background.js"</pre>

<p>{{WebExtExamples}}</p>

<div class="note"><p><strong>Note :</strong></p>

<p>Cette API est basée sur l'API Chromium <a href="https://developer.chrome.com/extensions/extension"><code>chrome.extension</code></a>. Cette documentation est dérivée de <a href="https://chromium.googlesource.com/chromium/src/+/master/chrome/common/extensions/api/extension.json"><code>extension.json</code></a> dans le code Chromium.</p>

<p>Les données de compatibilité relatives à Microsoft Edge sont fournies par Microsoft Corporation et incluses ici sous la licence Creative Commons Attribution 3.0 pour les États-Unis.</p>
</div>

<div class="hidden">
<pre>// Copyright 2015 The Chromium Authors. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//    * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//    * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//    * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
</pre>
</div>