> ## Documentation Index
> Fetch the complete documentation index at: https://docs.supernote.com/llms.txt
> Use this file to discover all available pages before exploring further.

# generateLassoPreview

> Generate preview image data for lasso elements.

```ts wrap theme={null}
static generateLassoPreview(imagePath: string): Promise<APIResponse<LassoPreview>>;
```

**Parameters**

| Parameter   | Type     | Description                       |
| ----------- | -------- | --------------------------------- |
| `imagePath` | `string` | Output path for the preview image |

**Returns**

* [`APIResponse<T>`](/en/api-reference/supernote-plugin/types/api-response): `result` is a lasso preview object with the following structure:

| Field          | Type                                                    | Description                         |
| -------------- | ------------------------------------------------------- | ----------------------------------- |
| `imagePath`    | `string`                                                | Path of the generated preview image |
| `rect`         | [`Rect`](/en/api-reference/supernote-plugin/types/rect) | Lasso area                          |
| `rotateDegree` | `number`                                                | Rotation angle                      |

## Example

```ts wrap theme={null}
import { PluginCommAPI } from 'sn-plugin-lib';

/**
 * Example: generate a preview image for lasso elements.
 */
export async function exampleGenerateLassoPreview() {
  const res = await PluginCommAPI.generateLassoPreview('/storage/emulated/0/Note/out/lasso-preview.png');
  if (!res.success) {
    throw new Error(res.error?.message ?? 'generateLassoPreview call failed');
  }
  return res.result;
}
```