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

# onDesignPublish

API reference for the JavaScript API's onDesignPublish method.

A function that runs when a user publishes a design.

## Usage

```javascript
api.createDesign({
  design: {
    type: "Poster",
  },
  onDesignPublish: (opts) => {
    console.log(opts);
  },
});
```

**Tip:**
You can pass the `onDesignPublish` function into the [`createDesign`](https://www.canva.dev/docs/button/javascript/api-reference/create-design/) and [`editDesign`](https://www.canva.dev/docs/button/javascript/api-reference/edit-design/) functions.

## Parameters

| Name               | Type   | Required | Description                                                                                                                                                                                                                                                                                                                           |
| :----------------- | :----- | :------: | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `opts`             | object |    Yes   | Parameters that Canva passes into the function.                                                                                                                                                                                                                                                                                       |
| `opts.designId`    | string |    Yes   | The ID of the user's design.                                                                                                                                                                                                                                                                                                          |
| `opts.designTitle` | string |    Yes   | The title of the user's design.                                                                                                                                                                                                                                                                                                       |
| `opts.exportUrl`   | string |    Yes   | The URL for downloading the user's design. This URL expires after 15 minutes. The URL is in the form `https://export-download.canva.com/<export_file>`. If you're using the China version of the SDK, the TLD is `.cn` instead of `.com`. You can take the necessary security measures to protect the URL from any malicious attacks. |

## Returns

`void`