---
title: "ChangeCallback | Upload js | Api client"
description: "Documentation for Upload JS"
---

> For AI agents: a documentation index is available at [/llms.txt](https://docs.maptiler.com/llms.txt). Markdown versions of all pages are available by appending .md to any URL.

# Type Alias ChangeCallback

ChangeCallback: (api: [UploadAPI](https://docs.maptiler.com/upload-js/api/classes/UploadAPI/)) \=> void

#### Type Declaration

-   -   (api: [UploadAPI](https://docs.maptiler.com/upload-js/api/classes/UploadAPI/)): void
    -   #### Parameters
        
        -   api: [UploadAPI](https://docs.maptiler.com/upload-js/api/classes/UploadAPI/)
        
        #### Returns void
        

-   Defined in [client/types.ts:5](https://github.com/maptiler/maptiler-upload-js/blob/9a8e1ef4a2e85d959471c8ef80adaab2ecd39027/packages/core/src/client/types.ts#L5)