---
title: "CorsAllowedHeadersResolver"
source: "https://github.com/remix-run/remix/blob/8905f3943706e1f53696ab83e70a84873cabfc90/packages/cors-middleware/src/lib/cors.ts#L43"
---

# CorsAllowedHeadersResolver

## Summary

Resolves the request headers allowed by a preflight request.

## Signature

```ts
interface CorsAllowedHeadersResolver {
  (
    request: Request,
    context: RequestContext,
  ): CorsAllowedHeadersResolverResult | Promise<CorsAllowedHeadersResolverResult>
}

```