From da78a9e329e272dedb2400b79a3bdeebff387d47 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:42:17 -0500
Subject: initial commit

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+---
+title: 사용자 행동
+slug: Mozilla/Add-ons/WebExtensions/User_actions
+translation_of: Mozilla/Add-ons/WebExtensions/User_actions
+---
+<div>{{AddonSidebar}}</div>
+
+<p>Some WebExtension APIs perform functions that are generally performed as a result of a user action. For example:</p>
+
+<ul>
+ <li>a browser action with a popup will display the popup when the user clicks it, but there's also a {{WebExtAPIRef("browserAction.openPopup")}} API enabling an extension to open the popup programmatically.</li>
+ <li>if an extension adds a sidebar, it is typically opened by the user via some part of the browser's built-in user interface, such as the View/Sidebar menu. But there's also a {{WebExtAPIRef("sidebarAction.open")}} API enabling an extension to open their sidebar programmatically.</li>
+</ul>
+
+<p>To follow the principle of "no surprises", APIs like this can only be called from inside the handler for a user action. User actions include the following:</p>
+
+<ul>
+ <li>Clicking the extension's browser action or page action.</li>
+ <li>Selecting a context menu item defined by the extension.</li>
+ <li>Activating a keyboard shortcut defined by the extension (this only treated as a user action from Firefox 63 onwards).</li>
+ <li>Clicking a button in a page bundled with the extension.</li>
+</ul>
+
+<p>For example:</p>
+
+<pre class="brush: js">function handleClick() {
+  browser.sidebarAction.open();
+}
+
+browser.browserAction.onClicked.addListener(handleClick);</pre>
+
+<p>Note that user actions in normal web pages are not treated as user actions for this purpose. For example, if a user clicks a button in a normal web page, and a content script has added a click handler for that button and in that handler sends a message to the extension's background page, then the background page message handler is not considered to be handling a user action.</p>
+
+<p>Also, if a user input handler waits on a <a href="/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise">promise</a>, then its status as a user input handler is lost. For example:</p>
+
+<pre class="brush: js">async function handleClick() {
+  let result = await someAsyncFunction();
+
+  // this will fail, because the handler lost its "user action handler" status
+  browser.sidebarAction.open();
+}
+
+browser.browserAction.onClicked.addListener(handleClick);</pre>
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