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

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

# Interface NavigationPrecommitHandler

-   NavigationPrecommitHandler(  
        controller: [NavigationPrecommitController](https://docs-qmgv.pages.dev/sdk-js/api-reference/interfaces/Externals.NavigationPrecommitController/),  
    ): void | [PromiseLike](https://docs-qmgv.pages.dev/sdk-js/api-reference/interfaces/Externals.PromiseLike/)<void\>[](#navigationprecommithandler)
    
    #### Parameters
    
    -   controller: [NavigationPrecommitController](https://docs-qmgv.pages.dev/sdk-js/api-reference/interfaces/Externals.NavigationPrecommitController/)
    
    #### Returns void | [PromiseLike](https://docs-qmgv.pages.dev/sdk-js/api-reference/interfaces/Externals.PromiseLike/)<void\>