---
title: "ErrorCallback | 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 ErrorCallback

ErrorCallback: (  
    code: HttpStatusCode,  
    message: string,  
    api: [UploadAPI](https://docs.maptiler.com/upload-js/api/classes/UploadAPI/) | null,  
) \=> void

#### Type Declaration

-   -   (code: HttpStatusCode, message: string, api: [UploadAPI](https://docs.maptiler.com/upload-js/api/classes/UploadAPI/) | null): void
    -   #### Parameters
        
        -   code: HttpStatusCode
        -   message: string
        -   api: [UploadAPI](https://docs.maptiler.com/upload-js/api/classes/UploadAPI/) | null
        
        #### Returns void
        

-   Defined in [client/types.ts:6](https://github.com/maptiler/maptiler-upload-js/blob/9a8e1ef4a2e85d959471c8ef80adaab2ecd39027/packages/core/src/client/types.ts#L6)