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+---
+title: Ação de página
+slug: Mozilla/Add-ons/WebExtensions/API/pageAction
+tags:
+  - API
+  - Ação de página
+  - Extensões
+  - Extensões da Web
+  - Extras
+  - Interface
+  - Não Padrão
+  - Referencia
+translation_of: Mozilla/Add-ons/WebExtensions/API/pageAction
+---
+<div>{{AddonSidebar}}</div>
+
+<p>Uma <a href="/pt-PT/Add-ons/WebExtensions/interface_do_utilizador/Acoes_pagina">ação de página</a> é ícone clicável dentro da barra de endereço do navegador.</p>
+
+<p> </p>
+
+<p><img alt="" src="https://mdn.mozillademos.org/files/12960/page-action.png" style="display: block; height: 262px; margin-left: auto; margin-right: auto; width: 850px;"></p>
+
+<p>Pode ouvir cliques no ícone, ou especificar uma <a href="/pt-PT/Add-ons/WebExtensions/interface_do_utilizador/Popups">janela (<em>popup</em>)</a> que será aberta quando o ícone for clicado.</p>
+
+<p>If you specify a popup, you can define its contents and behavior using HTML, CSS, and JavaScript, just like a normal web page. JavaScript running in the popup gets access to all the same WebExtension APIs as your background scripts.</p>
+
+<p>You can define most of a page action's properties declaratively using the <a href="/en-US/Add-ons/WebExtensions/manifest.json/page_action">page_action key</a> in your <a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json">manifest.json</a>, but can also redefine them programmatically using this API.</p>
+
+<p>Page actions are for actions that are only relevant to particular pages. If your icon should always be available, use a <a href="/en-US/docs/Mozilla/Add-ons/WebExtensions/Browser_action">browser action</a> instead.</p>
+
+<h2 id="Tipos">Tipos</h2>
+
+<dl>
+ <dt>{{WebExtAPIRef("pageAction.ImageDataType")}}</dt>
+ <dd>Dados de píxel para uma imagem.</dd>
+</dl>
+
+<h2 id="Funções">Funções</h2>
+
+<dl>
+ <dt>{{WebExtAPIRef("pageAction.show()")}}</dt>
+ <dd>Shows the page action for a given tab.</dd>
+ <dt>{{WebExtAPIRef("pageAction.hide()")}}</dt>
+ <dd>Hides the page action for a given tab.</dd>
+ <dt>{{WebExtAPIRef("pageAction.setTitle()")}}</dt>
+ <dd>Sets the page action's title. This is displayed in a tooltip over the page action.</dd>
+ <dt>{{WebExtAPIRef("pageAction.getTitle()")}}</dt>
+ <dd>Gets the page action's title.</dd>
+ <dt>{{WebExtAPIRef("pageAction.setIcon()")}}</dt>
+ <dd>Sets the page action's icon.</dd>
+ <dt>{{WebExtAPIRef("pageAction.setPopup()")}}</dt>
+ <dd>Sets the URL for the page action's popup.</dd>
+ <dt>{{WebExtAPIRef("pageAction.getPopup()")}}</dt>
+ <dd>Gets the URL for the page action's popup.</dd>
+ <dt>{{WebExtAPIRef("pageAction.openPopup()")}}</dt>
+ <dd>Opens the page action's popup.</dd>
+</dl>
+
+<h2 id="Eventos">Eventos</h2>
+
+<dl>
+ <dt>{{WebExtAPIRef("pageAction.onClicked")}}</dt>
+ <dd>Fired when a page action icon is clicked. This event will not fire if the page action has a popup.</dd>
+</dl>
+
+<h2 id="Compatibilidade_de_navegador">Compatibilidade de navegador</h2>
+
+<p>{{Compat("webextensions.api.pageAction")}}</p>
+
+<p>{{WebExtExamples("h2")}}</p>
+
+<div class="note"><strong>Reconhecimentos</strong>
+
+<p>This API is based on Chromium's <a href="https://developer.chrome.com/extensions/pageAction"><code>chrome.pageAction</code></a> API. This documentation is derived from <a href="https://chromium.googlesource.com/chromium/src/+/master/chrome/common/extensions/api/page_action.json"><code>page_action.json</code></a> in the Chromium code.</p>
+
+<p>Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.</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>