zh-CN: create action.getTitle() (#22946)

Co-authored-by: A1lo <[email protected]>

files/zh-cn/mozilla/add-ons/webextensions/api/action/gettitle/index.md

@@ -0,0 +1,103 @@
+---
+title: action.getTitle()
+slug: Mozilla/Add-ons/WebExtensions/API/action/getTitle
+l10n:
+  sourceCommit: b30a10c08b986ebabd44733fb62f67667350403e
+---
+
+{{AddonSidebar}}
+
+获取浏览器操作的标题。
+
+> [!NOTE]
+> 该 API 在 Manifest V3 或更高版本中可用。
+
+就像你可以使用 {{WebExtAPIRef("action.setTitle()")}} 在每个标签页上设置标题一样，你也可以通过将标签页的 ID 传递给此函数来检索特定于标签页的标题。
+
+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 gettingTitle = browser.action.getTitle(
+  details               // 对象
+)
+```
+
+### 参数
+
+- `details`
+
+  - : 一个含有下列属性的对象：
+
+    - `tabId` {{optional_inline}}
+      - : `integer`，指定要获取标题的标签页。
+    - `windowId` {{optional_inline}}
+      - : `integer`，指定要获取标题的窗口。
+
+<!---->
+
+- 若同时指定了 `windowId` 和 `tabId`，则函数出错且其返回的 promise 会被拒绝。
+- 若同时未指定 `windowId` 和 `tabId`，则返回全局标题。
+
+### 返回值
+
+一个 [`Promise`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Promise)，会兑现包含浏览器操作的标题的字符串。
+
+## 示例
+
+在用户点击浏览器操作时，此代码在“this”和“that”之间切换标题：
+
+```js
+function toggleTitle(title) {
+  if (title === "this") {
+    browser.action.setTitle({ title: "that" });
+  } else {
+    browser.action.setTitle({ title: "this" });
+  }
+}
+
+browser.action.onClicked.addListener(() => {
+  let gettingTitle = browser.action.getTitle({});
+  gettingTitle.then(toggleTitle);
+});
+```
+
+{{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-getTitle) 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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