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+---
+title: management.onEnabled()
+slug: Mozilla/Add-ons/WebExtensions/API/management/onEnabled
+l10n:
+  sourceCommit: b8a0743ca8b1e1b1b1a95cc93a4413c020f11262
+---
+
+{{AddonSidebar}}
+
+该事件监听器在 `enabled` 事件被触发时调用，表示一个附加组件现在已被启用。
+
+此 API 需要“management”[API 权限](/zh-CN/docs/Mozilla/Add-ons/WebExtensions/manifest.json/permissions)。
+
+## 语法
+
+```js-nolint
+browser.management.onEnabled.addListener(listener)
+browser.management.onEnabled.removeListener(listener)
+browser.management.onEnabled.hasListener(listener)
+```
+
+事件有三个函数：
+
+- `addListener(listener)`
+  - : 向此事件添加监听器。
+- `removeListener(listener)`
+  - : 停止监听此事件。`listener` 参数是要移除的监听器。
+- `hasListener(listener)`
+  - : 检查是否已为此事件注册了 `listener`。如果正在监听，则返回 `true`，否则返回 `false`。
+
+## addListener 语法
+
+### 参数
+
+- `listener`
+
+  - : 在此事件发生时调用的函数。此函数接收以下参数：
+
+    - `info`
+      - : [`ExtensionInfo`](/zh-CN/docs/Mozilla/Add-ons/WebExtensions/API/management/ExtensionInfo)，关于已安装的附加组件的信息。
+
+## 浏览器兼容性
+
+{{Compat}}
+
+## 示例
+
+打印被启用的附加组件的名称：
+
+```js
+browser.management.onEnabled.addListener((info) => {
+  console.log(`${info.name} 被启用`);
+});
+```
+
+{{WebExtExamples}}
+
+> [!NOTE]
+> 该 API 基于 Chromium 的 [`chrome.management`](https://developer.chrome.google.cn/docs/extensions/reference/api/management#event-onEnabled) API。本文衍生自 Chromium 代码中的 [`management.json`](https://chromium.googlesource.com/chromium/src/+/master/extensions/common/api/management.json)。
+
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