---
title: "Router"
source: "https://github.com/remix-run/remix/blob/8905f3943706e1f53696ab83e70a84873cabfc90/packages/spa/src/lib/spa.ts#L36"
---

# Router

## Summary

Minimal router contract used by [`run`](/spa/function/run/).

## Signature

```ts
interface Router {
  fetch(input: string | URL | Request, init: RequestInit): Promise<Response>
}

```