--- title: devtools.panels.ElementsPanel slug: Mozilla/Add-ons/WebExtensions/API/devtools/panels/ElementsPanel tags: - API - Add-ons - DevTools - Extensions - Reference - WebExtensions - devtools.panels - devtools.panelsElementsPanel translation_of: Mozilla/Add-ons/WebExtensions/API/devtools.panels/ElementsPanel original_slug: Mozilla/Add-ons/WebExtensions/API/devtools.panels/ElementsPanel --- {{AddonSidebar()}} Un `ElementsPanel` représente l'inspecteur HTML/CSS dans la devtools du navigateur. C'est ce qu'on appelle l'inspecteur de page dans Firefox et le panneau Éléments de Chrome. ## Fonctions - [`devtools.panels.ElementsPanel.createSidebarPane()`](/fr/Add-ons/WebExtensions/API/devtools.panels/ElementsPanel/createSidebarPane) - : Crée un volet dans la barre latérale de l'inspecteur. ## Evénements - [`devtools.panels.ElementsPanel.onSelectionChanged`](/fr/Add-ons/WebExtensions/API/devtools.panels/ElementsPanel/onSelectionChanged) - : Appèle lorsque l'utilisateur sélectionne un élément différent dans la page, par exemple en utilisant l'élément de menu contextuel "inspect élément". ## Compatibilité du navigateur {{Compat("webextensions.api.devtools.panels.ElementsPanel", 10)}} {{WebExtExamples}} > **Note :** > > Cette API est basée sur l'API Chromium [`chrome.devtools.panels`](https://developer.chrome.com/extensions/devtools_panels). <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>