---
title: "ResolveReject | 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 ResolveReject

type ResolveReject \= {  
    [reject](#reject): (reason?: Error) \=> void;  
    [resolve](#resolve): (value?: [RequestResponseMessageMap](https://docs.maptiler.com/sdk-js/api-reference/types/RequestResponseMessageMap/)\[[MessageType](https://docs.maptiler.com/sdk-js/api-reference/enums/MessageType/)\]\[1\]) \=> void;  
}

##### Index

### Properties[](#properties)

[reject](#reject) [resolve](#resolve)

## Properties[](#properties-1)

### reject[](#reject)

reject: (reason?: Error) \=> void

### resolve[](#resolve)

resolve: (value?: [RequestResponseMessageMap](https://docs.maptiler.com/sdk-js/api-reference/types/RequestResponseMessageMap/)\[[MessageType](https://docs.maptiler.com/sdk-js/api-reference/enums/MessageType/)\]\[1\]) \=> void