> 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/domains-api/tossauth/tossauth.login.md).

# TossAuth.login

> 函数式 API `appLogin`也可以用来使用相同功能。

### 功能说明

使用 Toss 认证登录。登录完成后会再次跳转到 Toss 应用。返回的 `authorizationCode`和 `referrer`将其传给服务器，继续进行登录处理即可。

### 类型

```ts
TossAuth.login(): Promise<AppLoginResponse>;
```

**参数**

无

**响应**

```ts
type AppLoginResponse = {
  authorizationCode: string;
  referrer: "DEFAULT" | "SANDBOX";
};
```

### 示例代码

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

const button = document.querySelector("#login-button");

button.addEventListener("click", async () => {
  try {
    const { authorizationCode, referrer } = await TossAuth.login();
    // 将 authorizationCode 和 referrer 传给服务器
  } catch (error) {
    console.error(error);
  }
});
```


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