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+---
+title: action.getPopup()
+slug: Mozilla/Add-ons/WebExtensions/API/action/getPopup
+l10n:
+  sourceCommit: b30a10c08b986ebabd44733fb62f67667350403e
+---
+
+{{AddonSidebar}}
+
+获取设为该浏览器操作的弹窗的 HTML 文档。
+
+> [!NOTE]
+> 该 API 在 Manifest V3 或更高版本中可用。
+
+这是一个返回 [`Promise`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Promise) 的异步函数。
+
+## 语法
+
+```js-nolint
+let gettingPopup = browser.action.getPopup(
+  details               // 对象
+)
+```
+
+### 参数
+
+- `details`
+
+  - : 一个含有下列属性的对象：
+
+    - `tabId` {{optional_inline}}
+      - : `integer`，指定要获取弹窗的标签页。
+    - `windowId` {{optional_inline}}
+      - : `integer`，指定要获取弹窗的窗口。
+
+<!---->
+
+- 若同时指定了 `windowId` 和 `tabId`，则函数出错。
+- 若同时未指定 `windowId` 和 `tabId`，则返回全局弹窗。
+
+### 返回值
+
+一个 [`Promise`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Promise)，会兑现包含弹窗文档的 URL 的字符串。该 URL 是完全限定 URL，例如 `moz-extension://d1d8a2eb-fe60-f646-af30-a866c5b39942/popups/popup2.html`。
+
+## 示例
+
+获取弹窗的 URL：
+
+```js
+function gotPopup(popupURL) {
+  console.log(popupURL);
+}
+
+let gettingPopup = browser.action.getPopup({});
+gettingPopup.then(gotPopup);
+```
+
+{{WebExtExamples}}
+
+## 浏览器兼容性
+
+{{Compat}}
+
+> [!NOTE]
+> 该 API 基于 Chromium 的 [`chrome.action`](https://developer.chrome.com/docs/extensions/reference/action/#method-getPopup) API。该文档衍生自 Chromium 代码中的 [`browser_action.json`](https://chromium.googlesource.com/chromium/src/+/master/chrome/common/extensions/api/browser_action.json)。
+
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