---
title: MemoryRouter
---

# MemoryRouter

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[MODES: declarative]

## Summary

[Reference Documentation ↗](https://api.reactrouter.com/v7/functions/react_router.MemoryRouter.html)

A declarative [`<Router>`](../declarative-routers/Router) that stores all entries in memory.

## Signature

```tsx
function MemoryRouter({
  basename,
  children,
  initialEntries,
  initialIndex,
}: MemoryRouterProps): React.ReactElement
```

## Props

### basename

Application basename

### children

Nested [`Route`](../components/Route) elements describing the route tree

### initialEntries

Initial entries in the in-memory history stack

### initialIndex

Index of `initialEntries` the application should initialize to