---
title: "WheelEvent | 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 WheelEvent

WheelEvent: {  
    DOM\_DELTA\_LINE: 1;  
    DOM\_DELTA\_PAGE: 2;  
    DOM\_DELTA\_PIXEL: 0;  
    prototype: [WheelEvent](https://docs.maptiler.com/sdk-js/api-reference/interfaces/Externals.WheelEvent/);  
    new (type: string, eventInitDict?: [WheelEventInit](https://docs.maptiler.com/sdk-js/api-reference/interfaces/Externals.WheelEventInit/)): [WheelEvent](https://docs.maptiler.com/sdk-js/api-reference/interfaces/Externals.WheelEvent/);  
}

#### Type Declaration

-   -   new (type: string, eventInitDict?: [WheelEventInit](https://docs.maptiler.com/sdk-js/api-reference/interfaces/Externals.WheelEventInit/)): [WheelEvent](https://docs.maptiler.com/sdk-js/api-reference/interfaces/Externals.WheelEvent/)
    -   #### Parameters
        
        -   type: string
        -   `Optional`eventInitDict: [WheelEventInit](https://docs.maptiler.com/sdk-js/api-reference/interfaces/Externals.WheelEventInit/)
        
        #### Returns [WheelEvent](https://docs.maptiler.com/sdk-js/api-reference/interfaces/Externals.WheelEvent/)
        
-   ##### `Readonly`DOM\_DELTA\_LINE: 1
    
-   ##### `Readonly`DOM\_DELTA\_PAGE: 2
    
-   ##### `Readonly`DOM\_DELTA\_PIXEL: 0
    
-   ##### prototype: [WheelEvent](https://docs.maptiler.com/sdk-js/api-reference/interfaces/Externals.WheelEvent/)