> 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/ads/loadfullscreenad.md).

# loadFullScreenAd

### Feature description

Preload the integrated full-screen ad. Toss Ad is shown first, and in environments where it's unavailable, it automatically falls back to AdMob so you can display ads reliably. You must call it before showing an ad.

It behaves differently depending on the Toss app version:

| Toss app version                       | Supported features                                                                           |
| -------------------------------------- | -------------------------------------------------------------------------------------------- |
| `5.239.0` and above                    | Toss Ad + AdMob integration (Toss Ad first, automatically switches to AdMob if not possible) |
| `5.227.0` and above \~ `5.239.0` below | Show only AdMob ads                                                                          |
| `5.227.0` below                        | Not supported                                                                                |

Before calling `loadFullScreenAd.isSupported()`You can check support with

### Type

```ts
loadFullScreenAd(params: LoadFullScreenAdParams): () => void;
```

**Params**

```ts
type LoadFullScreenAdParams = {
  options: LoadFullScreenAdOptions;
  onEvent: (event: LoadFullScreenAdEvent) => void;
  onError: (error: unknown) => void;
};

type LoadFullScreenAdOptions = {
  /** This is the ad group ID. Please enter the value issued from the App in Toss console. */
  adGroupId: string;
};

type LoadFullScreenAdEvent = {
  type: "loaded";
};
```

**Response**

Function that releases the app bridge callback (`() => void`) to release resources.

### Error

If ad loading fails, `onError` An error is passed through the callback. If you call it on an unsupported version `onError`an error is passed through, so before calling `isSupported()`check it.

### Example code

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

let isAdLoaded = false;

function prepareAd() {
  if (!loadFullScreenAd.isSupported()) {
    console.warn("Full-screen ads aren't available in the current environment.");
    return;
  }

  const cleanup = loadFullScreenAd({
    options: { adGroupId: "AD_GROUP_ID" },
    onEvent: (event) => {
      if (event.type === "loaded") {
        console.log("Ad loaded successfully");
        isAdLoaded = true;
        cleanup();
      }
    },
    onError: (error) => {
      console.error("Ad loading failed:", error);
      cleanup();
    },
  });
}
```


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