---
title: "StencilFuncType | 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.

# Type Alias StencilFuncType

type StencilFuncType \= {  
    [func](#func): [CompareFuncType](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.CompareFuncType/);  
    [mask](#mask): number;  
    [ref](#ref): number;  
}

##### Index

### Properties[](#properties)

[func](#func) [mask](#mask) [ref](#ref)

## Properties[](#properties-1)

### func[](#func)

func: [CompareFuncType](https://docs.maptiler.com/sdk-js/api-reference/types/Externals.CompareFuncType/)

### mask[](#mask)

mask: number

### ref[](#ref)

ref: number