---
title: "function | JavaScript maps SDK"
description: "Documentation for MapTiler SDK"
---

> 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.

# Variable function`Const`

function: {  
    convertFunction: typeof [convertFunction](https://docs.maptiler.com/sdk-js/api-reference/functions/convertFunction/);  
    createFunction: typeof [createFunction](https://docs.maptiler.com/sdk-js/api-reference/functions/createFunction/);  
    isFunction: typeof [isFunction](https://docs.maptiler.com/sdk-js/api-reference/functions/isFunction/);  
}

#### Type Declaration

-   ##### convertFunction: typeof [convertFunction](https://docs.maptiler.com/sdk-js/api-reference/functions/convertFunction/)
    
-   ##### createFunction: typeof [createFunction](https://docs.maptiler.com/sdk-js/api-reference/functions/createFunction/)
    
-   ##### isFunction: typeof [isFunction](https://docs.maptiler.com/sdk-js/api-reference/functions/isFunction/)