> For the complete documentation index, see [llms.txt](https://developers-apps-in-toss.toss.im/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers-apps-in-toss.toss.im/documentation/api-and-sdk-zh/sdk/shi-jian/tdsevent.md).

# tdsEvent

### 功能说明

订阅 TDS 导航栏事件。

* `navigationAccessoryEvent` — 当导航栏的附件按钮被按下时，所按下按钮的 `{ id }`会被传递。按钮注册请使用 `partner.addAccessoryButton`。（仅限合作伙伴 WebView——公开参考文档中没有。）

### 类型

```ts
tdsEvent.addEventListener(
  event: "navigationAccessoryEvent",
  args: { onEvent: (data: { id: string }) => void; onError?: (error: Error) => void },
): () => void;
```

**参数**

* `event` — 这是要订阅的事件。目前只有 `"navigationAccessoryEvent"`(导航栏附件按钮按下)这一种。
* `args.onEvent: (data: { id: string }) => void` — 当按钮被按下时，所按下按钮的 `id`会与之一起被调用。
* `args.onError?: (error: Error) => void` — 在订阅处理过程中发生错误时会被调用。

**响应**

返回取消订阅的函数 `() => void`。调用后会移除监听器。

### 示例代码

```js
import { tdsEvent } from "@apps-in-toss/web-framework";

const unsubscribe = tdsEvent.addEventListener("navigationAccessoryEvent", {
  onEvent: ({ id }) => {
    if (id === "search") {
      openSearch();
    }
  },
});
```


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