> 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-en/sdk/domains-api/analytics/analytics.log.md).

# Analytics.log

> Functional API `eventLog`You can use the same functionality with it as well.

### Feature description

Records events that occur in the app. You can log various types such as debugging, information, warnings, errors, screens, impressions, clicks, and more. In a sandbox environment, they are printed to the console, and in a production environment, they are recorded in the log system.

`params`for user identification `anonymous_key`is automatically included as a default parameter. If you pass the same key directly, the value you passed takes precedence. `undefined` The value is removed before sending, and all remaining values are normalized to strings.

Toss app Android/iOS `5.208.0` It can be used in versions and above. In unsupported versions, logs are silently ignored without an error.

### Type

```ts
Analytics.log(params: EventLogParams): Promise<void>;
```

**Params**

```ts
type EventLogParams = {
  log_name: string;
  log_type:
    | "debug"
    | "info"
    | "warn"
    | "error"
    | "event"
    | "screen"
    | "impression"
    | "click"
    | "popup";
  params: Record<string, string | number | boolean | null | undefined>;
};
```

**Response**

None.

### Example code

#### JavaScript

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

try {
  await Analytics.log({
    log_name: "user_action",
    log_type: "event",
    params: {
      action: "button_click",
      screen: "main",
      userId: 12345,
    },
  });
} catch (error) {
  console.error(error);
}
```


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