zh-CN: create action.getBadgeBackgroundColor() (#22942)

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

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

@@ -0,0 +1,98 @@
+---
+title: action.getBadgeBackgroundColor()
+slug: Mozilla/Add-ons/WebExtensions/API/action/getBadgeBackgroundColor
+l10n:
+  sourceCommit: b30a10c08b986ebabd44733fb62f67667350403e
+---
+
+{{AddonSidebar}}
+
+获取浏览器操作徽章的背景颜色。
+
+> [!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
+browser.action.getBadgeBackgroundColor(
+  details // 对象
+)
+```
+
+### 参数
+
+- `details`
+
+  - : 一个拥有下列属性的对象：
+
+    - `tabId` {{optional_inline}}
+      - : `integer`，指定要获取徽章背景颜色的标签页。
+    - `windowId` {{optional_inline}}
+      - : `integer`，指定要获取徽章背景颜色的窗口。
+
+<!---->
+
+- 若同时指定了 `windowId` 和 `tabId`，则函数出错。
+- 若同时未指定 `windowId` 和 `tabId`，则返回全局徽章的背景颜色。
+
+### 返回值
+
+一个 [`Promise`](/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Promise)，会兑现表示获取到的颜色的 {{WebExtAPIRef('action.ColorArray')}}。
+
+## 示例
+
+输出徽章的背景颜色：
+
+```js
+function onGot(color) {
+  console.log(color);
+}
+
+function onFailure(error) {
+  console.log(error);
+}
+
+browser.action.getBadgeBackgroundColor({}).then(onGot, onFailure);
+```
+
+{{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-getBadgeBackgroundColor) API。本文衍生自 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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