> ## 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.

# onDesignClose

API reference for the JavaScript API's onDesignClose method.

A function that runs when a user closes a design.

## Usage

```javascript
api.createDesign({
  design: {
    type: "Poster",
  },
  onDesignClose: () => {
    // code goes here
  },
});
```

**Tip:**
You can pass the `onDesignClose` 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

This function doesn't receive any parameters.

## Returns

`void`