`react-router`

7.9.4

Patch Changes

handle external redirects in from server actions (#14400)

New (unstable) useRoute hook for accessing data from specific routes (#14407)

For example, let's say you have an admin route somewhere in your app and you want any child routes of admin to all have access to the loaderData and actionData from admin.

// app/routes/admin.tsx
import { Outlet } from "react-router";

export const loader = () => ({ message: "Hello, loader!" });

export const action = () => ({ count: 1 });

export default function Component() {
  return (
    <div>
      {/* ... */}
      <Outlet />
      {/* ... */}
    </div>
  );
}

You might even want to create a reusable widget that all of the routes nested under admin could use:

import { unstable_useRoute as useRoute } from "react-router";

export function AdminWidget() {
  // How to get `message` and `count` from `admin` route?
}

In framework mode, useRoute knows all your app's routes and gives you TS errors when invalid route IDs are passed in:

export function AdminWidget() {
  const admin = useRoute("routes/dmin");
  //                      ^^^^^^^^^^^
}

useRoute returns undefined if the route is not part of the current page:

export function AdminWidget() {
  const admin = useRoute("routes/admin");
  if (!admin) {
    throw new Error(`AdminWidget used outside of "routes/admin"`);
  }
}

Note: the root route is the exception since it is guaranteed to be part of the current page. As a result, useRoute never returns undefined for root.

loaderData and actionData are marked as optional since they could be accessed before the action is triggered or after the loader threw an error:

export function AdminWidget() {
  const admin = useRoute("routes/admin");
  if (!admin) {
    throw new Error(`AdminWidget used outside of "routes/admin"`);
  }
  const { loaderData, actionData } = admin;
  console.log(loaderData);
  //          ^? { message: string } | undefined
  console.log(actionData);
  //          ^? { count: number } | undefined
}

If instead of a specific route, you wanted access to the current route's loaderData and actionData, you can call useRoute without arguments:

export function AdminWidget() {
  const currentRoute = useRoute();
  currentRoute.loaderData;
  currentRoute.actionData;
}

This usage is equivalent to calling useLoaderData and useActionData, but consolidates all route data access into one hook: useRoute.

Note: when calling useRoute() (without a route ID), TS has no way to know which route is the current route. As a result, loaderData and actionData are typed as unknown. If you want more type-safety, you can either narrow the type yourself with something like zod or you can refactor your app to pass down typed props to your AdminWidget:

export function AdminWidget({
  message,
  count,
}: {
  message: string;
  count: number;
}) {
  /* ... */
}

7.9.3

Patch Changes

Do not try to use turbo-stream to decode CDN errors that never reached the server (#14385)
- We used to do this but lost this check with the adoption of single fetch
Fix Data Mode regression causing a 404 during initial load in when middleware exists without any loader functions (#14393)

7.9.2

Patch Changes

- Update client-side router to run client middleware on initial load even if no loaders exist (#14348)
- Update createRoutesStub to run route middleware
  - You will need to set the <RoutesStub future={{ v8_middleware: true }} /> flag to enable the proper context type
Update Lazy Route Discovery manifest requests to use a singular comma-separated paths query param instead of repeated p query params (#14321)
- This is because Cloudflare has a hard limit of 100 URL search param key/value pairs when used as a key for caching purposes
- If more that 100 paths were included, the cache key would be incomplete and could produce false-positive cache hits
[UNSTABLE] Add fetcher.unstable_reset() API (#14206)
Made useOutlet element reference have stable identity in-between route chages (#13382)
feat: enable full transition support for the rsc router (#14362)
In RSC Data Mode, handle SSR'd client errors and re-try in the browser (#14342)
Support middleware prop on <Route> for usage with a data router via createRoutesFromElements (#14357)
Handle encoded question mark and hash characters in ancestor splat routes (#14249)
Fail gracefully on manifest version mismatch logic if sessionStorage access is blocked (#14335)

7.9.1

Patch Changes

Fix internal Future interface naming from middleware -> v8_middleware (#14327)

7.9.0

Minor Changes

Stabilize middleware and context APIs. (#14215)

We have removed the unstable_ prefix from the following APIs and they are now considered stable and ready for production use:
- RouterContextProvider
- createContext
- createBrowserRouter getContext option
- <HydratedRouter> getContext prop
Please see the Middleware Docs, the Middleware RFC, and the Client-side Context RFC for more information.

Patch Changes

Escape HTML in meta() JSON-LD content (#14316)
Add react-server Await component implementation (#14261)
In RSC Data Mode when using a custom basename, fix hydration errors for routes that only have client loaders (#14264)
Make href function available in a react-server context (#14262)
decode each time getPayload() is called to allow for "in-context" decoding and hoisting of contextual assets (#14248)
href() now correctly processes routes that have an extension after the parameter or are a single optional parameter. (#13797)

7.8.2

Patch Changes

[UNSTABLE] Remove Data Mode future.unstable_middleware flag from createBrowserRouter (#14213)
- This is only needed as a Framework Mode flag because of the route modules and the getLoadContext type behavior change
- In Data Mode, it's an opt-in feature because it's just a new property on a route object, so there's no behavior changes that necessitate a flag
[UNSTABLE] Add <RouterProvider unstable_onError>/<HydratedRouter unstable_onError> prop for client side error reporting (#14162)
server action revalidation opt out via $SKIP_REVALIDATION field (#14154)
Properly escape interpolated param values in generatePath() (#13530)
Maintain ReadonlyMap and ReadonlySet types in server response data. (#13092)
[UNSTABLE] Delay serialization of .data redirects to 202 responses until after middleware chain (#14205)
Fix TypeError if you throw from patchRoutesOnNavigation when no partial matches exist (#14198)
Fix basename usage without a leading slash in data routers (#11671)
[UNSTABLE] Update client middleware so it returns the data strategy results allowing for more advanced post-processing middleware (#14151)

7.8.1

Patch Changes

Fix usage of optional path segments in nested routes defined using absolute paths (#14135)
Bubble client pre-next middleware error to the shallowest ancestor that needs to load, not strictly the shallowest ancestor with a loader (#14150)
Fix optional static segment matching in matchPath (#11813)
Fix prerendering when a basename is set with ssr:false (#13791)
Provide isRouteErrorResponse utility in react-server environments (#14166)
Propagate non-redirect Responses thrown from middleware to the error boundary on document/data requests (#14182)
Handle meta and links Route Exports in RSC Data Mode (#14136)
Properly convert returned/thrown data() values to Response instances via Response.json() in resource routes and middleware (#14159, #14181)

7.8.0

Minor Changes

Add nonce prop to Links & PrefetchPageLinks (#14048)
Add loaderData arguments/properties alongside existing data arguments/properties to provide consistency and clarity between loaderData and actionData across the board (#14047)
- Updated types: Route.MetaArgs, Route.MetaMatch, MetaArgs, MetaMatch, Route.ComponentProps.matches, UIMatch
- @deprecated warnings have been added to the existing data properties to point users to new loaderData properties, in preparation for removing the data properties in a future major release

Patch Changes

Prevent "Did not find corresponding fetcher result" console error when navigating during a fetcher.submit revalidation (#14114)
Bubble client-side middleware errors prior to next to the appropriate ancestor error boundary (#14138)
Switch Lazy Route Discovery manifest URL generation to usea standalone URLSearchParams instance instead of URL.searchParams to avoid a major performance bottleneck in Chrome (#14084)
Adjust internal RSC usage of React.use to avoid Webpack compilation errors when using React 18 (#14113)
Remove dependency on @types/node in TypeScript declaration files (#14059)
Fix types for UIMatch to reflect that the loaderData/data properties may be undefined (#12206)
- When an ErrorBoundary is being rendered, not all active matches will have loader data available, since it may have been their loader that threw to trigger the boundary
- The UIMatch.data type was not correctly handing this and would always reflect the presence of data, leading to the unexpected runtime errors when an ErrorBoundary was rendered
- ⚠️ This may cause some type errors to show up in your code for unguarded match.data accesses - you should properly guard for undefined values in those scenarios.
```
// app/root.tsx
export function loader() {
  someFunctionThatThrows(); // ❌ Throws an Error
  return { title: "My Title" };
}

export function Layout({ children }: { children: React.ReactNode }) {
  let matches = useMatches();
  let rootMatch = matches[0] as UIMatch<Awaited<ReturnType<typeof loader>>>;
  //  ^ rootMatch.data is incorrectly typed here, so TypeScript does not
  //    complain if you do the following which throws an error at runtime:
  let { title } = rootMatch.data; // 💥

  return <html>...</html>;
}
```
[UNSTABLE] Ensure resource route errors go through handleError w/middleware enabled (#14078)
[UNSTABLE] Propagate returned Response from server middleware if next wasn't called (#14093)
[UNSTABLE] Allow server middlewares to return data() values which will be converted into a Response (#14093)
[UNSTABLE] Update middleware error handling so that the next function never throws and instead handles any middleware errors at the proper ErrorBoundary and returns the Response up through the ancestor next function (#14118)
[UNSTABLE] When middleware is enabled, make the context parameter read-only (via Readonly<unstable_RouterContextProvider>) so that TypeScript will not allow you to write arbitrary fields to it in loaders, actions, or middleware. (#14097)
[UNSTABLE] Rename and alter the signature/functionality of the unstable_respond API in staticHandler.query/staticHandler.queryRoute (#14103)
- The API has been renamed to unstable_generateMiddlewareResponse for clarity
- The main functional change is that instead of running the loaders/actions before calling unstable_respond and handing you the result, we now pass a query/queryRoute function as a parameter and you execute the loaders/actions inside your callback, giving you full access to pre-processing and error handling
- The query version of the API now has a signature of (query: (r: Request) => Promise<StaticHandlerContext | Response>) => Promise<Response>
- The queryRoute version of the API now has a signature of (queryRoute: (r: Request) => Promise<Response>) => Promise<Response>
- This allows for more advanced usages such as running logic before/after calling query and direct error handling of errors thrown from query
- ⚠️ This is a breaking change if you've adopted the staticHandler unstable_respond API
```
let response = await staticHandler.query(request, {
  requestContext: new unstable_RouterContextProvider(),
  async unstable_generateMiddlewareResponse(query) {
    try {
      // At this point we've run middleware top-down so we need to call the
      // handlers and generate the Response to bubble back up the middleware
      let result = await query(request);
      if (isResponse(result)) {
        return result; // Redirects, etc.
      }
      return await generateHtmlResponse(result);
    } catch (error: unknown) {
      return generateErrorResponse(error);
    }
  },
});
```
[UNSTABLE] Convert internal middleware implementations to use the new unstable_generateMiddlewareResponse API (#14103)
[UNSTABLE] Change getLoadContext signature (type GetLoadContextFunction) when future.unstable_middleware is enabled so that it returns an unstable_RouterContextProvider instance instead of a Map used to contruct the instance internally (#14097)
- This also removes the type unstable_InitialContext export
- ⚠️ This is a breaking change if you have adopted middleware and are using a custom server with a getLoadContext function
[UNSTABLE] Run client middleware on client navigations even if no loaders exist (#14106)
[UNSTABLE] Change the unstable_getContext signature on RouterProvider/HydratedRouter/unstable_RSCHydratedRouter so that it returns an unstable_RouterContextProvider instance instead of a Map used to contruct the instance internally (#14097)
- ⚠️ This is a breaking change if you have adopted the unstable_getContext prop
[UNSTABLE] proxy server action side-effect redirects from actions for document and callServer requests (#14131)
[UNSTABLE] Fix RSC Data Mode issue where routes that return false from shouldRevalidate would be replaced by an <Outlet /> (#14071)

7.7.1

Patch Changes

In RSC Data Mode, fix bug where routes with errors weren't forced to revalidate when shouldRevalidate returned false (#14026)
In RSC Data Mode, fix Matched leaf route at location "/..." does not have an element or Component warnings when error boundaries are rendered. (#14021)

7.7.0

Minor Changes

Add unstable RSC support (#13700)

For more information, see the RSC documentation.

Patch Changes

Handle InvalidCharacterError when validating cookie signature (#13847)
Pass a copy of searchParams to the setSearchParams callback function to avoid muations of the internal searchParams instance. This was an issue when navigations were blocked because the internal instance be out of sync with useLocation().search. (#12784)
Support invalid Date in turbo-stream v2 fork (#13684)
In Framework Mode, clear critical CSS in development after initial render (#13872)
Strip search parameters from patchRoutesOnNavigation path param for fetcher calls (#13911)
Skip scroll restoration on useRevalidator() calls because they're not new locations (#13671)
Support unencoded UTF-8 routes in prerender config with ssr set to false (#13699)
Do not throw if the url hash is not a valid URI component (#13247)
Fix a regression in createRoutesStub introduced with the middleware feature. (#13946)

As part of that work we altered the signature to align with the new middleware APIs without making it backwards compatible with the prior AppLoadContext API. This permitted createRoutesStub to work if you were opting into middleware and the updated context typings, but broke createRoutesStub for users not yet opting into middleware.

We've reverted this change and re-implemented it in such a way that both sets of users can leverage it.
```
// If you have not opted into middleware, the old API should work again
let context: AppLoadContext = {
  /*...*/
};
let Stub = createRoutesStub(routes, context);

// If you have opted into middleware, you should now pass an instantiated `unstable_routerContextProvider` instead of a `getContext` factory function.
let context = new unstable_RouterContextProvider();
context.set(SomeContext, someValue);
let Stub = createRoutesStub(routes, context);
```
⚠️ This may be a breaking bug for if you have adopted the unstable Middleware feature and are using createRoutesStub with the updated API.
Remove Content-Length header from Single Fetch responses (#13902)

7.6.3

Patch Changes

Do not serialize types for useRouteLoaderData<typeof clientLoader> (#13752)

For types to distinguish a clientLoader from a serverLoader, you MUST annotate clientLoader args:

//                                   👇 annotation required to skip serializing types
export function clientLoader({}: Route.ClientLoaderArgs) {
  return { fn: () => "earth" };
}

function SomeComponent() {
  const data = useRouteLoaderData<typeof clientLoader>("routes/this-route");
  const planet = data?.fn() ?? "world";
  return <h1>Hello, {planet}!</h1>;
}

7.6.2

Patch Changes

Avoid additional with-props chunk in Framework Mode by moving route module component prop logic from the Vite plugin to react-router (#13650)
Slight refactor of internal headers() function processing for use with RSC (#13639)

7.6.1

Patch Changes

Update Route.MetaArgs to reflect that data can be potentially undefined (#13563)

This is primarily for cases where a route loader threw an error to it's own ErrorBoundary. but it also arises in the case of a 404 which renders the root ErrorBoundary/meta but the root loader did not run because not routes matched.
Partially revert optimization added in 7.1.4 to reduce calls to matchRoutes because it surfaced other issues (#13562)

Fix typegen when same route is used at multiple paths (#13574)

For example, routes/route.tsx is used at 4 different paths here:

import { type RouteConfig, route } from "@react-router/dev/routes";
export default [
  route("base/:base", "routes/base.tsx", [
    route("home/:home", "routes/route.tsx", { id: "home" }),
    route("changelog/:changelog", "routes/route.tsx", { id: "changelog" }),
    route("splat/*", "routes/route.tsx", { id: "splat" }),
  ]),
  route("other/:other", "routes/route.tsx", { id: "other" }),
] satisfies RouteConfig;

Previously, typegen would arbitrarily pick one of these paths to be the "winner" and generate types for the route module based on that path. Now, typegen creates unions as necessary for alternate paths for the same route file.

Better types for params (#13543)

For example:
```
// routes.ts
import { type RouteConfig, route } from "@react-router/dev/routes";

export default [
  route("parent/:p", "routes/parent.tsx", [
    route("layout/:l", "routes/layout.tsx", [
      route("child1/:c1a/:c1b", "routes/child1.tsx"),
      route("child2/:c2a/:c2b", "routes/child2.tsx"),
    ]),
  ]),
] satisfies RouteConfig;
```
Previously, params for the routes/layout.tsx route were calculated as { p: string, l: string }. This incorrectly ignores params that could come from child routes. If visiting /parent/1/layout/2/child1/3/4, the actual params passed to routes/layout.tsx will have a type of { p: string, l: string, c1a: string, c1b: string }.

Now, params are aware of child routes and autocompletion will include child params as optionals:
```
params.|
//     ^ cursor is here and you ask for autocompletion
// p: string
// l: string
// c1a?: string
// c1b?: string
// c2a?: string
// c2b?: string
```
You can also narrow the types for params as it is implemented as a normalized union of params for each page that includes routes/layout.tsx:
```
if (typeof params.c1a === 'string') {
  params.|
  //     ^ cursor is here and you ask for autocompletion
  // p: string
  // l: string
  // c1a: string
  // c1b: string
}
```
UNSTABLE: renamed internal react-router/route-module export to react-router/internal UNSTABLE: removed Info export from generated +types/* files
Avoid initial fetcher execution 404 error when Lazy Route Discovery is interrupted by a navigation (#13564)

href replaces splats * (#13593)

const a = href("/products/*", { "*": "/1/edit" });
// -> /products/1/edit

7.6.0

Minor Changes

Added a new react-router.config.ts routeDiscovery option to configure Lazy Route Discovery behavior. (#13451)
- By default, Lazy Route Discovery is enabled and makes manifest requests to the /__manifest path:
  - routeDiscovery: { mode: "lazy", manifestPath: "/__manifest" }
- You can modify the manifest path used:
  - routeDiscovery: { mode: "lazy", manifestPath: "/custom-manifest" }
- Or you can disable this feature entirely and include all routes in the manifest on initial document load:
  - routeDiscovery: { mode: "initial" }

Add support for route component props in createRoutesStub. This allows you to unit test your route components using the props instead of the hooks: (#13528)

let RoutesStub = createRoutesStub([
  {
    path: "/",
    Component({ loaderData }) {
      let data = loaderData as { message: string };
      return <pre data-testid="data">Message: {data.message}</pre>;
    },
    loader() {
      return { message: "hello" };
    },
  },
]);

render(<RoutesStub />);

await waitFor(() => screen.findByText("Message: hello"));

Patch Changes

Fix react-router module augmentation for NodeNext (#13498)
Don't bundle react-router in react-router/dom CJS export (#13497)
Fix bug where a submitting fetcher would get stuck in a loading state if a revalidating loader redirected (#12873)
Fix hydration error if a server loader returned undefined (#13496)
Fix initial load 404 scenarios in data mode (#13500)
Stabilize useRevalidator's revalidate function (#13542)
Preserve status code if a clientAction throws a data() result in framework mode (#13522)
Be defensive against leading double slashes in paths to avoid Invalid URL errors from the URL constructor (#13510)
- Note we do not sanitize/normalize these paths - we only detect them so we can avoid the error that would be thrown by new URL("//", window.location.origin)
Remove Navigator declaration for navigator.connection.saveData to avoid messing with any other types beyond saveData in userland (#13512)
Fix handleError params values on .data requests for routes with a dynamic param as the last URL segment (#13481)
Don't trigger an ErrorBoundary UI before the reload when we detect a manifest verison mismatch in Lazy Route Discovery (#13480)
Inline `turbo-stream@2.4.1` dependency and fix decoding ordering of Map/Set instances (#13518)
Only render dev warnings in DEV mode (#13461)
UNSTABLE: Fix a few bugs with error bubbling in middleware use-cases (#13538)
Short circuit post-processing on aborted dataStrategy requests (#13521)
- This resolves non-user-facing console errors of the form Cannot read properties of undefined (reading 'result')

7.5.3

Patch Changes

Fix bug where bubbled action errors would result in loaderData being cleared at the handling ErrorBoundary route (#13476)
Handle redirects from clientLoader.hydrate initial load executions (#13477)

7.5.2

Patch Changes

Update Single Fetch to also handle the 204 redirects used in ?_data requests in Remix v2 (#13364)
- This allows applications to return a redirect on .data requests from outside the scope of React Router (i.e., an express/hono middleware)
- ⚠️ Please note that doing so relies on implementation details that are subject to change without a SemVer major release
- This is primarily done to ease upgrading to Single Fetch for existing Remix v2 applications, but the recommended way to handle this is redirecting from a route middleware
Adjust approach for Prerendering/SPA Mode via headers (#13453)

7.5.1

Patch Changes

Fix single fetch bug where no revalidation request would be made when navigating upwards to a reused parent route (#13253)

When using the object-based route.lazy API, the HydrateFallback and hydrateFallbackElement properties are now skipped when lazy loading routes after hydration. (#13376)

If you move the code for these properties into a separate file, you can use this optimization to avoid downloading unused hydration code. For example:

createBrowserRouter([
  {
    path: "/show/:showId",
    lazy: {
      loader: async () => (await import("./show.loader.js")).loader,
      Component: async () => (await import("./show.component.js")).Component,
      HydrateFallback: async () =>
        (await import("./show.hydrate-fallback.js")).HydrateFallback,
    },
  },
]);

Properly revalidate prerendered paths when param values change (#13380)
UNSTABLE: Add a new unstable_runClientMiddleware argument to dataStrategy to enable middleware execution in custom dataStrategy implementations (#13395)
UNSTABLE: Add better error messaging when getLoadContext is not updated to return a Map" (#13242)
Do not automatically add null to staticHandler.query() context.loaderData if routes do not have loaders (#13223)
- This was a Remix v2 implementation detail inadvertently left in for React Router v7
- Now that we allow returning undefined from loaders, our prior check of loaderData[routeId] !== undefined was no longer sufficient and was changed to a routeId in loaderData check - these null values can cause issues for this new check
- ⚠️ This could be a "breaking bug fix" for you if you are doing manual SSR with createStaticHandler()/<StaticRouterProvider>, and using context.loaderData to control <RouterProvider> hydration behavior on the client
Fix prerendering when a loader returns a redirect (#13365)
UNSTABLE: Update context type for LoaderFunctionArgs/ActionFunctionArgs when middleware is enabled (#13381)
Add support for the new unstable_shouldCallHandler/unstable_shouldRevalidateArgs APIs in dataStrategy (#13253)

7.5.0

Minor Changes

Add granular object-based API for route.lazy to support lazy loading of individual route properties, for example: (#13294)

createBrowserRouter([
  {
    path: "/show/:showId",
    lazy: {
      loader: async () => (await import("./show.loader.js")).loader,
      action: async () => (await import("./show.action.js")).action,
      Component: async () => (await import("./show.component.js")).Component,
    },
  },
]);

Breaking change for route.unstable_lazyMiddleware consumers

The route.unstable_lazyMiddleware property is no longer supported. If you want to lazily load middleware, you must use the new object-based route.lazy API with route.lazy.unstable_middleware, for example:

createBrowserRouter([
  {
    path: "/show/:showId",
    lazy: {
      unstable_middleware: async () =>
        (await import("./show.middleware.js")).middleware,
      // etc.
    },
  },
]);

Patch Changes

Introduce unstable_subResourceIntegrity future flag that enables generation of an importmap with integrity for the scripts that will be loaded by the browser. (#13163)

7.4.1

Patch Changes

Fix types on unstable_MiddlewareFunction to avoid type errors when a middleware doesn't return a value (#13311)
Dedupe calls to route.lazy functions (#13260)
Add support for route.unstable_lazyMiddleware function to allow lazy loading of middleware logic. (#13210)

Breaking change for unstable_middleware consumers

The route.unstable_middleware property is no longer supported in the return value from route.lazy. If you want to lazily load middleware, you must use route.unstable_lazyMiddleware.

7.4.0

Patch Changes

Fix root loader data on initial load redirects in SPA mode (#13222)
Load ancestor pathless/index routes in lazy route discovery for upwards non-eager-discoery routing (#13203)
Fix shouldRevalidate behavior for clientLoader-only routes in ssr:true apps (#13221)
UNSTABLE: Fix RequestHandler loadContext parameter type when middleware is enabled (#13204)
UNSTABLE: Update Route.unstable_MiddlewareFunction to have a return value of Response | undefined instead of Response | void becaue you should not return anything if you aren't returning the Response (#13199)
UNSTABLE(BREAKING): If a middleware throws an error, ensure we only bubble the error itself via next() and are no longer leaking the MiddlewareError implementation detail (#13180)

7.3.0

Minor Changes

Add fetcherKey as a parameter to patchRoutesOnNavigation (#13061)
- In framework mode, Lazy Route Discovery will now detect manifest version mismatches after a new deploy
- On navigations to undiscovered routes, this mismatch will trigger a document reload of the destination path
- On fetcher calls to undiscovered routes, this mismatch will trigger a document reload of the current path

Patch Changes

Skip resource route flow in dev server in SPA mode (#13113)

Support middleware on routes (unstable) (#12941)

Middleware is implemented behind a future.unstable_middleware flag. To enable, you must enable the flag and the types in your react-router-config.ts file:

import type { Config } from "@react-router/dev/config";
import type { Future } from "react-router";

declare module "react-router" {
  interface Future {
    unstable_middleware: true; // 👈 Enable middleware types
  }
}

export default {
  future: {
    unstable_middleware: true, // 👈 Enable middleware
  },
} satisfies Config;

⚠️ Middleware is unstable and should not be adopted in production. There is at least one known de-optimization in route module loading for clientMiddleware that we will be addressing this before a stable release.

⚠️ Enabling middleware contains a breaking change to the context parameter passed to your loader/action functions - see below for more information.

Once enabled, routes can define an array of middleware functions that will run sequentially before route handlers run. These functions accept the same parameters as loader/action plus an additional next parameter to run the remaining data pipeline. This allows middlewares to perform logic before and after handlers execute.

// Framework mode
export const unstable_middleware = [serverLogger, serverAuth]; // server
export const unstable_clientMiddleware = [clientLogger]; // client

// Library mode
const routes = [
  {
    path: "/",
    // Middlewares are client-side for library mode SPA's
    unstable_middleware: [clientLogger, clientAuth],
    loader: rootLoader,
    Component: Root,
  },
];

Here's a simple example of a client-side logging middleware that can be placed on the root route:

const clientLogger: Route.unstable_ClientMiddlewareFunction = async (
  { request },
  next,
) => {
  let start = performance.now();

  // Run the remaining middlewares and all route loaders
  await next();

  let duration = performance.now() - start;
  console.log(`Navigated to ${request.url} (${duration}ms)`);
};

Note that in the above example, the next/middleware functions don't return anything. This is by design as on the client there is no "response" to send over the network like there would be for middlewares running on the server. The data is all handled behind the scenes by the stateful router.

For a server-side middleware, the next function will return the HTTP Response that React Router will be sending across the wire, thus giving you a chance to make changes as needed. You may throw a new response to short circuit and respond immediately, or you may return a new or altered response to override the default returned by next().

const serverLogger: Route.unstable_MiddlewareFunction = async (
  { request, params, context },
  next,
) => {
  let start = performance.now();

  // 👇 Grab the response here
  let res = await next();

  let duration = performance.now() - start;
  console.log(`Navigated to ${request.url} (${duration}ms)`);

  // 👇 And return it here (optional if you don't modify the response)
  return res;
};

You can throw a redirect from a middleware to short circuit any remaining processing:

import { sessionContext } from "../context";
const serverAuth: Route.unstable_MiddlewareFunction = (
  { request, params, context },
  next,
) => {
  let session = context.get(sessionContext);
  let user = session.get("user");
  if (!user) {
    session.set("returnTo", request.url);
    throw redirect("/login", 302);
  }
};

Note that in cases like this where you don't need to do any post-processing you don't need to call the next function or return a Response.

Here's another example of using a server middleware to detect 404s and check the CMS for a redirect:

const redirects: Route.unstable_MiddlewareFunction = async ({
  request,
  next,
}) => {
  // attempt to handle the request
  let res = await next();

  // if it's a 404, check the CMS for a redirect, do it last
  // because it's expensive
  if (res.status === 404) {
    let cmsRedirect = await checkCMSRedirects(request.url);
    if (cmsRedirect) {
      throw redirect(cmsRedirect, 302);
    }
  }

  return res;
};

context parameter

When middleware is enabled, your application will use a different type of context parameter in your loaders and actions to provide better type safety. Instead of AppLoadContext, context will now be an instance of ContextProvider that you can use with type-safe contexts (similar to React.createContext):

import { unstable_createContext } from "react-router";
import { Route } from "./+types/root";
import type { Session } from "./sessions.server";
import { getSession } from "./sessions.server";

let sessionContext = unstable_createContext<Session>();

const sessionMiddleware: Route.unstable_MiddlewareFunction = ({
  context,
  request,
}) => {
  let session = await getSession(request);
  context.set(sessionContext, session);
  //                          ^ must be of type Session
};

// ... then in some downstream middleware
const loggerMiddleware: Route.unstable_MiddlewareFunction = ({
  context,
  request,
}) => {
  let session = context.get(sessionContext);
  //  ^ typeof Session
  console.log(session.get("userId"), request.method, request.url);
};

// ... or some downstream loader
export function loader({ context }: Route.LoaderArgs) {
  let session = context.get(sessionContext);
  let profile = await getProfile(session.get("userId"));
  return { profile };
}

If you are using a custom server with a getLoadContext function, the return value for initial context values passed from the server adapter layer is no longer an object and should now return an unstable_InitialContext (Map<RouterContext, unknown>):

let adapterContext = unstable_createContext<MyAdapterContext>();

function getLoadContext(req, res): unstable_InitialContext {
  let map = new Map();
  map.set(adapterContext, getAdapterContext(req));
  return map;
}

Fix types for loaderData and actionData that contained Records (#13139)

UNSTABLE(BREAKING):

unstable_SerializesTo added a way to register custom serialization types in Single Fetch for other library and framework authors like Apollo. It was implemented with branded type whose branded property that was made optional so that casting arbitrary values was easy:
```
// without the brand being marked as optional
let x1 = 42 as unknown as unstable_SerializesTo<number>;
//          ^^^^^^^^^^

// with the brand being marked as optional
let x2 = 42 as unstable_SerializesTo<number>;
```
However, this broke type inference in loaderData and actionData for any Record types as those would now (incorrectly) match unstable_SerializesTo. This affected all users, not just those that depended on unstable_SerializesTo. To fix this, the branded property of unstable_SerializesTo is marked as required instead of optional.

For library and framework authors using unstable_SerializesTo, you may need to add as unknown casts before casting to unstable_SerializesTo.
Fix single fetch _root.data requests when a basename is used (#12898)
Add context support to client side data routers (unstable) (#12941)

Your application loader and action functions on the client will now receive a context parameter. This is an instance of unstable_RouterContextProvider that you use with type-safe contexts (similar to React.createContext) and is most useful with the corresponding middleware/clientMiddleware API's:
```
import { unstable_createContext } from "react-router";

type User = {
  /*...*/
};

let userContext = unstable_createContext<User>();

function sessionMiddleware({ context }) {
  let user = await getUser();
  context.set(userContext, user);
}

// ... then in some downstream loader
function loader({ context }) {
  let user = context.get(userContext);
  let profile = await getProfile(user.id);
  return { profile };
}
```
Similar to server-side requests, a fresh context will be created per navigation (or fetcher call). If you have initial data you'd like to populate in the context for every request, you can provide an unstable_getContext function at the root of your app:
- Library mode - createBrowserRouter(routes, { unstable_getContext })
- Framework mode - <HydratedRouter unstable_getContext>
This function should return an value of type unstable_InitialContext which is a Map<unstable_RouterContext, unknown> of context's and initial values:
```
const loggerContext = unstable_createContext<(...args: unknown[]) => void>();

function logger(...args: unknown[]) {
  console.log(new Date.toISOString(), ...args);
}

function unstable_getContext() {
  let map = new Map();
  map.set(loggerContext, logger);
  return map;
}
```

7.2.0

Minor Changes

New type-safe href utility that guarantees links point to actual paths in your app (#13012)

import { href } from "react-router";

export default function Component() {
  const link = href("/blog/:slug", { slug: "my-first-post" });
  return (
    <main>
      <Link to={href("/products/:id", { id: "asdf" })} />
      <NavLink to={href("/:lang?/about", { lang: "en" })} />
    </main>
  );
}

Patch Changes

Fix typegen for repeated params (#13012)

In React Router, path parameters are keyed by their name. So for a path pattern like /a/:id/b/:id?/c/:id, the last :id will set the value for id in useParams and the params prop. For example, /a/1/b/2/c/3 will result in the value { id: 3 } at runtime.

Previously, generated types for params incorrectly modeled repeated params with an array. So /a/1/b/2/c/3 generated a type like { id: [1,2,3] }.

To be consistent with runtime behavior, the generated types now correctly model the "last one wins" semantics of path parameters. So /a/1/b/2/c/3 now generates a type like { id: 3 }.
Don't apply Single Fetch revalidation de-optimization when in SPA mode since there is no server HTTP request (#12948)
Properly handle revalidations to across a prerender/SPA boundary (#13021)
- In "hybrid" applications where some routes are pre-rendered and some are served from a SPA fallback, we need to avoid making .data requests if the path wasn't pre-rendered because the request will 404
- We don't know all the pre-rendered paths client-side, however:
  - All loader data in ssr:false mode is static because it's generated at build time
  - A route must use a clientLoader to do anything dynamic
  - Therefore, if a route only has a loader and not a clientLoader, we disable revalidation by default because there is no new data to retrieve
  - We short circuit and skip single fetch .data request logic if there are no server loaders with shouldLoad=true in our single fetch dataStrategy
  - This ensures that the route doesn't cause a .data request that would 404 after a submission
Error at build time in ssr:false + prerender apps for the edge case scenario of: (#13021)
- A parent route has only a loader (does not have a clientLoader)
- The parent route is pre-rendered
- The parent route has children routes which are not prerendered
- This means that when the child paths are loaded via the SPA fallback, the parent won't have any loaderData because there is no server on which to run the loader
- This can be resolved by either adding a parent clientLoader or pre-rendering the child paths
- If you add a clientLoader, calling the serverLoader() on non-prerendered paths will throw a 404
Add unstable support for splitting route modules in framework mode via future.unstable_splitRouteModules (#11871)
Add unstable_SerializesTo brand type for library authors to register types serializable by React Router's streaming format (turbo-stream) (ab5b05b02)
Align dev server behavior with static file server behavior when ssr:false is set (#12948)
- When no prerender config exists, only SSR down to the root HydrateFallback (SPA Mode)
- When a prerender config exists but the current path is not prerendered, only SSR down to the root HydrateFallback (SPA Fallback)
- Return a 404 on .data requests to non-pre-rendered paths
Improve prefetch performance of CSS side effects in framework mode (#12889)
Disable Lazy Route Discovery for all ssr:false apps and not just "SPA Mode" because there is no runtime server to serve the search-param-configured __manifest requests (#12894)
- We previously only disabled this for "SPA Mode" which is ssr:false and no prerender config but we realized it should apply to all ssr:false apps, including those prerendering multiple pages
- In those prerender scenarios we would prerender the /__manifest file assuming the static file server would serve it but that makes some unneccesary assumptions about the static file server behaviors
Properly handle interrupted manifest requests in lazy route discovery (#12915)

7.1.5

Patch Changes

Fix regression introduced in 7.1.4 via #12800 that caused issues navigating to hash routes inside splat routes for applications using Lazy Route Discovery (patchRoutesOnNavigation) (#12927)

7.1.4

Patch Changes

Internal reorg to clean up some duplicated route module types (#12799)
Properly handle status codes that cannot have a body in single fetch responses (204, etc.) (#12760)
Stop erroring on resource routes that return raw strings/objects and instead serialize them as text/plain or application/json responses (#12848)
- This only applies when accessed as a resource route without the .data extension
- When accessed from a Single Fetch .data request, they will still be encoded via turbo-stream
Optimize Lazy Route Discovery path discovery to favor a single querySelectorAll call at the body level instead of many calls at the sub-tree level (#12731)
Properly bubble headers as errorHeaders when throwing a data() result (#12846)
- Avoid duplication of Set-Cookie headers could be duplicated if also returned from headers
Optimize route matching by skipping redundant matchRoutes calls when possible (#12800)

7.1.3

No changes

7.1.2

Patch Changes

Fix issue with fetcher data cleanup in the data layer on fetcher unmount (#12681)
Do not rely on symbol for filtering out redirect responses from loader data (#12694)

Previously, some projects were getting type checking errors like:
```
error TS4058: Return type of exported function has or is using name 'redirectSymbol' from external module "node_modules/..." but cannot be named.
```
Now that symbols are not used for the redirect response type, these errors should no longer be present.

7.1.1

No changes

7.1.0

Patch Changes

Throw unwrapped single fetch redirect to align with pre-single fetch behavior (#12506)
Ignore redirects when inferring loader data types (#12527)
Remove <Link prefetch> warning which suffers from false positives in a lazy route discovery world (#12485)

7.0.2

Patch Changes

temporarily only use one build in export map so packages can have a peer dependency on react router (#12437)
Generate wide matches and params types for current route and child routes (#12397)

At runtime, matches includes child route matches and params include child route path parameters. But previously, we only generated types for parent routes in matches; for params, we only considered the parent routes and the current route. To align our generated types more closely to the runtime behavior, we now generate more permissive, wider types when accessing child route information.

7.0.1

No changes

7.0.0

Major Changes

Remove the original defer implementation in favor of using raw promises via single fetch and turbo-stream. This removes these exports from React Router: (#11744)
- defer
- AbortedDeferredError
- type TypedDeferredData
- UNSAFE_DeferredData
- UNSAFE_DEFERRED_SYMBOL,
- Collapse @remix-run/router into react-router (#11505)
- Collapse react-router-dom into react-router
- Collapse @remix-run/server-runtime into react-router
- Collapse @remix-run/testing into react-router
Remove single fetch future flag. (#11522)
Drop support for Node 16, React Router SSR now requires Node 18 or higher (#11391)
Remove future.v7_startTransition flag (#11696)
- Expose the underlying router promises from the following APIs for compsition in React 19 APIs: (#11521)
  - useNavigate()
  - useSubmit
  - useFetcher().load
  - useFetcher().submit
  - useRevalidator.revalidate
Remove future.v7_normalizeFormMethod future flag (#11697)
For Remix consumers migrating to React Router, the crypto global from the Web Crypto API is now required when using cookie and session APIs. This means that the following APIs are provided from react-router rather than platform-specific packages: (#11837)
- createCookie
- createCookieSessionStorage
- createMemorySessionStorage
- createSessionStorage
For consumers running older versions of Node, the installGlobals function from @remix-run/node has been updated to define globalThis.crypto, using Node's require('node:crypto').webcrypto implementation.

Since platform-specific packages no longer need to implement this API, the following low-level APIs have been removed:
- createCookieFactory
- createSessionStorageFactory
- createCookieSessionStorageFactory
- createMemorySessionStorageFactory
Imports/Exports cleanup (#11840)
- Removed the following exports that were previously public API from @remix-run/router
  - types
    - AgnosticDataIndexRouteObject
    - AgnosticDataNonIndexRouteObject
    - AgnosticDataRouteMatch
    - AgnosticDataRouteObject
    - AgnosticIndexRouteObject
    - AgnosticNonIndexRouteObject
    - AgnosticRouteMatch
    - AgnosticRouteObject
    - TrackedPromise
    - unstable_AgnosticPatchRoutesOnMissFunction
    - Action -> exported as NavigationType via react-router
    - Router exported as DataRouter to differentiate from RR's <Router>
  - API
    - getToPathname (@private)
    - joinPaths (@private)
    - normalizePathname (@private)
    - resolveTo (@private)
    - stripBasename (@private)
    - createBrowserHistory -> in favor of createBrowserRouter
    - createHashHistory -> in favor of createHashRouter
    - createMemoryHistory -> in favor of createMemoryRouter
    - createRouter
    - createStaticHandler -> in favor of wrapper createStaticHandler in RR Dom
    - getStaticContextFromError
- Removed the following exports that were previously public API from react-router
  - Hash
  - Pathname
  - Search
update minimum node version to 18 (#11690)
Remove future.v7_prependBasename from the ionternalized @remix-run/router package (#11726)
Migrate Remix type generics to React Router (#12180)
- These generics are provided for Remix v2 migration purposes
- These generics and the APIs they exist on should be considered informally deprecated in favor of the new Route.* types
- Anyone migrating from React Router v6 should probably not leverage these new generics and should migrate straight to the Route.* types
- For React Router v6 users, these generics are new and should not impact your app, with one exception
  - useFetcher previously had an optional generic (used primarily by Remix v2) that expected the data type
  - This has been updated in v7 to expect the type of the function that generates the data (i.e., typeof loader/typeof action)
  - Therefore, you should update your usages:
    - ❌ useFetcher<LoaderData>()
    - ✅ useFetcher<typeof loader>()
Remove future.v7_throwAbortReason from internalized @remix-run/router package (#11728)
Add exports field to all packages (#11675)
node package no longer re-exports from react-router (#11702)
renamed RemixContext to FrameworkContext (#11705)
updates the minimum React version to 18 (#11689)
PrefetchPageDescriptor replaced by PageLinkDescriptor (#11960)
- Consolidate types previously duplicated across @remix-run/router, @remix-run/server-runtime, and @remix-run/react now that they all live in react-router (#12177)
  - Examples: LoaderFunction, LoaderFunctionArgs, ActionFunction, ActionFunctionArgs, DataFunctionArgs, RouteManifest, LinksFunction, Route, EntryRoute
  - The RouteManifest type used by the "remix" code is now slightly stricter because it is using the former @remix-run/router RouteManifest
    - Record<string, Route> -> Record<string, Route | undefined>
  - Removed AppData type in favor of inlining unknown in the few locations it was used
  - Removed ServerRuntimeMeta* types in favor of the Meta* types they were duplicated from
- Remove the future.v7_partialHydration flag (#11725)
  - This also removes the <RouterProvider fallbackElement> prop
    - To migrate, move the fallbackElement to a hydrateFallbackElement/HydrateFallback on your root route
  - Also worth nothing there is a related breaking changer with this future flag:
    - Without future.v7_partialHydration (when using fallbackElement), state.navigation was populated during the initial load
    - With future.v7_partialHydration, state.navigation remains in an "idle" state during the initial load
Remove v7_relativeSplatPath future flag (#11695)
Drop support for Node 18, update minimum Node vestion to 20 (#12171)
- Remove installGlobals() as this should no longer be necessary
Remove remaining future flags (#11820)
- React Router v7_skipActionErrorRevalidation
- Remix v3_fetcherPersist, v3_relativeSplatPath, v3_throwAbortReason
rename createRemixStub to createRoutesStub (#11692)
Remove @remix-run/router deprecated detectErrorBoundary option in favor of mapRouteProperties (#11751)
Add react-router/dom subpath export to properly enable react-dom as an optional peerDependency (#11851)
- This ensures that we don't blindly import ReactDOM from "react-dom" in <RouterProvider> in order to access ReactDOM.flushSync(), since that would break createMemoryRouter use cases in non-DOM environments
- DOM environments should import from react-router/dom to get the proper component that makes ReactDOM.flushSync() available:
  - If you are using the Vite plugin, use this in your entry.client.tsx:
    - import { HydratedRouter } from 'react-router/dom'
  - If you are not using the Vite plugin and are manually calling createBrowserRouter/createHashRouter:
    - import { RouterProvider } from "react-router/dom"
Remove future.v7_fetcherPersist flag (#11731)
Update cookie dependency to ^1.0.1 - please see the release notes for any breaking changes (#12172)

Minor Changes

Add support for prerender config in the React Router vite plugin, to support existing SSG use-cases (#11539)
- You can use the prerender config to pre-render your .html and .data files at build time and then serve them statically at runtime (either from a running server or a CDN)
- prerender can either be an array of string paths, or a function (sync or async) that returns an array of strings so that you can dynamically generate the paths by talking to your CMS, etc.

// react-router.config.ts
import type { Config } from "@react-router/dev/config";

export default {
  async prerender() {
    let slugs = await fakeGetSlugsFromCms();
    // Prerender these paths into `.html` files at build time, and `.data`
    // files if they have loaders
    return ["/", "/about", ...slugs.map((slug) => `/product/${slug}`)];
  },
} satisfies Config;

async function fakeGetSlugsFromCms() {
  await new Promise((r) => setTimeout(r, 1000));
  return ["shirt", "hat"];
}

Params, loader data, and action data as props for route component exports (#11961)

export default function Component({ params, loaderData, actionData }) {}

export function HydrateFallback({ params }) {}
export function ErrorBoundary({ params, loaderData, actionData }) {}

Remove duplicate RouterProvider impliementations (#11679)
Typesafety improvements (#12019)

React Router now generates types for each of your route modules. You can access those types by importing them from ./+types.<route filename without extension>. For example:
```
// app/routes/product.tsx
import type * as Route from "./+types.product";

export function loader({ params }: Route.LoaderArgs) {}

export default function Component({ loaderData }: Route.ComponentProps) {}
```
This initial implementation targets type inference for:
- Params : Path parameters from your routing config in routes.ts including file-based routing
- LoaderData : Loader data from loader and/or clientLoader within your route module
- ActionData : Action data from action and/or clientAction within your route module
In the future, we plan to add types for the rest of the route module exports: meta, links, headers, shouldRevalidate, etc. We also plan to generate types for typesafe Links:
```
<Link to="/products/:id" params={{ id: 1 }} />
//        ^^^^^^^^^^^^^          ^^^^^^^^^
// typesafe `to` and `params` based on the available routes in your app
```
Check out our docs for more:
- Explanations > Type Safety
- How-To > Setting up type safety
Stabilize unstable_dataStrategy (#11969)
Stabilize unstable_patchRoutesOnNavigation (#11970)

Patch Changes

No changes (506329c4e)
chore: re-enable development warnings through a development exports condition. (#12269)
Remove unstable upload handler. (#12015)
Remove unneeded dependency on @web3-storage/multipart-parser (#12274)
Fix redirects returned from loaders/actions using data() (#12021)
fix(react-router): (v7) fix static prerender of non-ascii characters (#12161)
Replace substr with substring (#12080)
Remove the deprecated json utility (#12146)
- You can use Response.json if you still need to construct JSON responses in your app
Remove unneeded dependency on source-map (#12275)

6.28.0

Minor Changes

- Log deprecation warnings for v7 flags (#11750)
- Add deprecation warnings to json/defer in favor of returning raw objects
  - These methods will be removed in React Router v7

Patch Changes

Update JSDoc URLs for new website structure (add /v6/ segment) (#12141)
Updated dependencies:
- @remix-run/router@1.21.0

6.27.0

Minor Changes

Stabilize unstable_patchRoutesOnNavigation (#11973)
- Add new PatchRoutesOnNavigationFunctionArgs type for convenience (#11967)
Stabilize unstable_dataStrategy (#11974)
Stabilize the unstable_flushSync option for navigations and fetchers (#11989)
Stabilize the unstable_viewTransition option for navigations and the corresponding unstable_useViewTransitionState hook (#11989)

Patch Changes

Fix bug when submitting to the current contextual route (parent route with an index child) when an ?index param already exists from a prior submission (#12003)
Fix useFormAction bug - when removing ?index param it would not keep other non-Remix index params (#12003)
Fix types for RouteObject within PatchRoutesOnNavigationFunction's patch method so it doesn't expect agnostic route objects passed to patch (#11967)
Updated dependencies:
- @remix-run/router@1.20.0

6.26.2

Patch Changes

Updated dependencies:
- @remix-run/router@1.19.2

6.26.1

Patch Changes

Rename unstable_patchRoutesOnMiss to unstable_patchRoutesOnNavigation to match new behavior (#11888)
Updated dependencies:
- @remix-run/router@1.19.1

6.26.0

Minor Changes

Add a new replace(url, init?) alternative to redirect(url, init?) that performs a history.replaceState instead of a history.pushState on client-side navigation redirects (#11811)

Patch Changes

Fix initial hydration behavior when using future.v7_partialHydration along with unstable_patchRoutesOnMiss (#11838)
- During initial hydration, router.state.matches will now include any partial matches so that we can render ancestor HydrateFallback components
Updated dependencies:
- @remix-run/router@1.19.0

6.25.1

No significant changes to this package were made in this release. See the repo CHANGELOG.md for an overview of all changes in v6.25.1.

6.25.0

Minor Changes

Stabilize future.unstable_skipActionErrorRevalidation as future.v7_skipActionErrorRevalidation (#11769)
- When this flag is enabled, actions will not automatically trigger a revalidation if they return/throw a Response with a 4xx/5xx status code
- You may still opt-into revalidation via shouldRevalidate
- This also changes shouldRevalidate's unstable_actionStatus parameter to actionStatus

Patch Changes

Fix regression and properly decode paths inside useMatch so matches/params reflect decoded params (#11789)
Updated dependencies:
- @remix-run/router@1.18.0

6.24.1

Patch Changes

When using future.v7_relativeSplatPath, properly resolve relative paths in splat routes that are children of pathless routes (#11633)
Updated dependencies:
- @remix-run/router@1.17.1

6.24.0

Minor Changes

Add support for Lazy Route Discovery (a.k.a. Fog of War) (#11626)
- RFC: https://github.com/remix-run/react-router/discussions/11113
- unstable_patchRoutesOnMiss docs: https://reactrouter.com/v6/routers/create-browser-router

Patch Changes

Updated dependencies:
- @remix-run/router@1.17.0

6.23.1

Patch Changes

allow undefined to be resolved with <Await> (#11513)
Updated dependencies:
- @remix-run/router@1.16.1

6.23.0

Minor Changes

Add a new unstable_dataStrategy configuration option (#11098)
- This option allows Data Router applications to take control over the approach for executing route loaders and actions
- The default implementation is today's behavior, to fetch all loaders in parallel, but this option allows users to implement more advanced data flows including Remix single-fetch, middleware/context APIs, automatic loader caching, and more

Patch Changes

Updated dependencies:
- @remix-run/router@1.16.0

6.22.3

Patch Changes

Updated dependencies:
- @remix-run/router@1.15.3

6.22.2

Patch Changes

Updated dependencies:
- @remix-run/router@1.15.2

6.22.1

Patch Changes

Fix encoding/decoding issues with pre-encoded dynamic parameter values (#11199)
Updated dependencies:
- @remix-run/router@1.15.1

6.22.0

Patch Changes

Updated dependencies:
- @remix-run/router@1.15.0

6.21.3

Patch Changes

Remove leftover unstable_ prefix from Blocker/BlockerFunction types (#11187)

6.21.2

Patch Changes

Updated dependencies:
- @remix-run/router@1.14.2

6.21.1

Patch Changes

Fix bug with route.lazy not working correctly on initial SPA load when v7_partialHydration is specified (#11121)
Updated dependencies:
- @remix-run/router@1.14.1

6.21.0

Minor Changes

Add a new future.v7_relativeSplatPath flag to implement a breaking bug fix to relative routing when inside a splat route. (#11087)

This fix was originally added in #10983 and was later reverted in #11078 because it was determined that a large number of existing applications were relying on the buggy behavior (see #11052)

The Bug The buggy behavior is that without this flag, the default behavior when resolving relative paths is to ignore any splat (*) portion of the current route path.

The Background This decision was originally made thinking that it would make the concept of nested different sections of your apps in <Routes> easier if relative routing would replace the current splat:
```
<BrowserRouter>
  <Routes>
    <Route path="/" element={<Home />} />
    <Route path="dashboard/*" element={<Dashboard />} />
  </Routes>
</BrowserRouter>
```
Any paths like /dashboard, /dashboard/team, /dashboard/projects will match the Dashboard route. The dashboard component itself can then render nested <Routes>:
```
function Dashboard() {
  return (
    <div>
      <h2>Dashboard</h2>
      <nav>
        <Link to="/">Dashboard Home</Link>
        <Link to="team">Team</Link>
        <Link to="projects">Projects</Link>
      </nav>

      <Routes>
        <Route path="/" element={<DashboardHome />} />
        <Route path="team" element={<DashboardTeam />} />
        <Route path="projects" element={<DashboardProjects />} />
      </Routes>
    </div>
  );
}
```
Now, all links and route paths are relative to the router above them. This makes code splitting and compartmentalizing your app really easy. You could render the Dashboard as its own independent app, or embed it into your large app without making any changes to it.

The Problem

The problem is that this concept of ignoring part of a path breaks a lot of other assumptions in React Router - namely that "." always means the current location pathname for that route. When we ignore the splat portion, we start getting invalid paths when using ".":
```
// If we are on URL /dashboard/team, and we want to link to /dashboard/team:
function DashboardTeam() {
  // ❌ This is broken and results in <a href="/dashboard">
  return <Link to=".">A broken link to the Current URL</Link>;

  // ✅ This is fixed but super unintuitive since we're already at /dashboard/team!
  return <Link to="./team">A broken link to the Current URL</Link>;
}
```
We've also introduced an issue that we can no longer move our DashboardTeam component around our route hierarchy easily - since it behaves differently if we're underneath a non-splat route, such as /dashboard/:widget. Now, our "." links will, properly point to ourself inclusive of the dynamic param value so behavior will break from it's corresponding usage in a /dashboard/* route.

Even worse, consider a nested splat route configuration:
```
<BrowserRouter>
  <Routes>
    <Route path="dashboard">
      <Route path="*" element={<Dashboard />} />
    </Route>
  </Routes>
</BrowserRouter>
```
Now, a <Link to="."> and a <Link to=".."> inside the Dashboard component go to the same place! That is definitely not correct!

Another common issue arose in Data Routers (and Remix) where any <Form> should post to it's own route action if you the user doesn't specify a form action:
```
let router = createBrowserRouter({
  path: "/dashboard",
  children: [
    {
      path: "*",
      action: dashboardAction,
      Component() {
        // ❌ This form is broken!  It throws a 405 error when it submits because
        // it tries to submit to /dashboard (without the splat value) and the parent
        // `/dashboard` route doesn't have an action
        return <Form method="post">...</Form>;
      },
    },
  ],
});
```
This is just a compounded issue from the above because the default location for a Form to submit to is itself (".") - and if we ignore the splat portion, that now resolves to the parent route.

The Solution If you are leveraging this behavior, it's recommended to enable the future flag, move your splat to it's own route, and leverage ../ for any links to "sibling" pages:
```
<BrowserRouter>
  <Routes>
    <Route path="dashboard">
      <Route index path="*" element={<Dashboard />} />
    </Route>
  </Routes>
</BrowserRouter>

function Dashboard() {
  return (
    <div>
      <h2>Dashboard</h2>
      <nav>
        <Link to="..">Dashboard Home</Link>
        <Link to="../team">Team</Link>
        <Link to="../projects">Projects</Link>
      </nav>

      <Routes>
        <Route path="/" element={<DashboardHome />} />
        <Route path="team" element={<DashboardTeam />} />
        <Route path="projects" element={<DashboardProjects />} />
      </Router>
    </div>
  );
}
```
This way, . means "the full current pathname for my route" in all cases (including static, dynamic, and splat routes) and .. always means "my parents pathname".

Patch Changes

Properly handle falsy error values in ErrorBoundary's (#11071)
Updated dependencies:
- @remix-run/router@1.14.0

6.20.1

Patch Changes

Revert the useResolvedPath fix for splat routes due to a large number of applications that were relying on the buggy behavior (see https://github.com/remix-run/react-router/issues/11052#issuecomment-1836589329). We plan to re-introduce this fix behind a future flag in the next minor version. (#11078)
Updated dependencies:
- @remix-run/router@1.13.1

6.20.0

Minor Changes

Export the PathParam type from the public API (#10719)

Patch Changes

Fix bug with resolveTo in splat routes (#11045)
- This is a follow up to #10983 to handle the few other code paths using getPathContributingMatches
- This removes the UNSAFE_getPathContributingMatches export from @remix-run/router since we no longer need this in the react-router/react-router-dom layers
Updated dependencies:
- @remix-run/router@1.13.0

6.19.0

Minor Changes

Add unstable_flushSync option to useNavigate/useSumbit/fetcher.load/fetcher.submit to opt-out of React.startTransition and into ReactDOM.flushSync for state updates (#11005)
Remove the unstable_ prefix from the useBlocker hook as it's been in use for enough time that we are confident in the API. We do not plan to remove the prefix from unstable_usePrompt due to differences in how browsers handle window.confirm that prevent React Router from guaranteeing consistent/correct behavior. (#10991)

Patch Changes

Fix useActionData so it returns proper contextual action data and not any action data in the tree (#11023)
Fix bug in useResolvedPath that would cause useResolvedPath(".") in a splat route to lose the splat portion of the URL path. (#10983)
- ⚠️ This fixes a quite long-standing bug specifically for "." paths inside a splat route which incorrectly dropped the splat portion of the URL. If you are relative routing via "." inside a splat route in your application you should double check that your logic is not relying on this buggy behavior and update accordingly.
Updated dependencies:
- @remix-run/router@1.12.0

6.18.0

Patch Changes

Fix the future prop on BrowserRouter, HashRouter and MemoryRouter so that it accepts a Partial<FutureConfig> instead of requiring all flags to be included. (#10962)
Updated dependencies:
- @remix-run/router@1.11.0

6.17.0

Patch Changes

Fix RouterProvider future prop type to be a Partial<FutureConfig> so that not all flags must be specified (#10900)
Updated dependencies:
- @remix-run/router@1.10.0

6.16.0

Minor Changes

In order to move towards stricter TypeScript support in the future, we're aiming to replace current usages of any with unknown on exposed typings for user-provided data. To do this in Remix v2 without introducing breaking changes in React Router v6, we have added generics to a number of shared types. These continue to default to any in React Router and are overridden with unknown in Remix. In React Router v7 we plan to move these to unknown as a breaking change. (#10843)
- Location now accepts a generic for the location.state value
- ActionFunctionArgs/ActionFunction/LoaderFunctionArgs/LoaderFunction now accept a generic for the context parameter (only used in SSR usages via createStaticHandler)
- The return type of useMatches (now exported as UIMatch) accepts generics for match.data and match.handle - both of which were already set to unknown
Move the @private class export ErrorResponse to an UNSAFE_ErrorResponseImpl export since it is an implementation detail and there should be no construction of ErrorResponse instances in userland. This frees us up to export a type ErrorResponse which correlates to an instance of the class via InstanceType. Userland code should only ever be using ErrorResponse as a type and should be type-narrowing via isRouteErrorResponse. (#10811)
Export ShouldRevalidateFunctionArgs interface (#10797)
Removed private/internal APIs only required for the Remix v1 backwards compatibility layer and no longer needed in Remix v2 (_isFetchActionRedirect, _hasFetcherDoneAnything) (#10715)

Patch Changes

Updated dependencies:
- @remix-run/router@1.9.0

6.15.0

Minor Changes

Add's a new redirectDocument() function which allows users to specify that a redirect from a loader/action should trigger a document reload (via window.location) instead of attempting to navigate to the redirected location via React Router (#10705)

Patch Changes

Ensure useRevalidator is referentially stable across re-renders if revalidations are not actively occurring (#10707)
Updated dependencies:
- @remix-run/router@1.8.0

6.14.2

Patch Changes

Updated dependencies:
- @remix-run/router@1.7.2

6.14.1

Patch Changes

Fix loop in unstable_useBlocker when used with an unstable blocker function (#10652)
Fix issues with reused blockers on subsequent navigations (#10656)
Updated dependencies:
- @remix-run/router@1.7.1

6.14.0

Patch Changes

Strip basename from locations provided to unstable_useBlocker functions to match useLocation (#10573)
Fix generatePath when passed a numeric 0 value parameter (#10612)
Fix unstable_useBlocker key issues in StrictMode (#10573)
Fix tsc --skipLibCheck:false issues on React 17 (#10622)
Upgrade typescript to 5.1 (#10581)
Updated dependencies:
- @remix-run/router@1.7.0

6.13.0

Minor Changes

Move React.startTransition usage behind a future flag to avoid issues with existing incompatible Suspense usages. We recommend folks adopting this flag to be better compatible with React concurrent mode, but if you run into issues you can continue without the use of startTransition until v7. Issues usually boils down to creating net-new promises during the render cycle, so if you run into issues you should either lift your promise creation out of the render cycle or put it behind a useMemo. (#10596)

Existing behavior will no longer include React.startTransition:
```
<BrowserRouter>
  <Routes>{/*...*/}</Routes>
</BrowserRouter>

<RouterProvider router={router} />
```
If you wish to enable React.startTransition, pass the future flag to your component:
```
<BrowserRouter future={{ v7_startTransition: true }}>
  <Routes>{/*...*/}</Routes>
</BrowserRouter>

<RouterProvider router={router} future={{ v7_startTransition: true }}/>
```

Patch Changes

Work around webpack/terser React.startTransition minification bug in production mode (#10588)

6.12.1

[!WARNING] Please use version 6.13.0 or later instead of 6.12.1. This version suffers from a webpack/terser minification issue resulting in invalid minified code in your resulting production bundles which can cause issues in your application. See #10579 for more details.

Patch Changes

Adjust feature detection of React.startTransition to fix webpack + react 17 compilation error (#10569)

6.12.0

Minor Changes

Wrap internal router state updates with React.startTransition if it exists (#10438)

Patch Changes

Updated dependencies:
- @remix-run/router@1.6.3

6.11.2

Patch Changes

Fix basename duplication in descendant <Routes> inside a <RouterProvider> (#10492)
Updated dependencies:
- @remix-run/router@1.6.2

6.11.1

Patch Changes

Fix usage of Component API within descendant <Routes> (#10434)
Fix bug when calling useNavigate from <Routes> inside a <RouterProvider> (#10432)
Fix usage of <Navigate> in strict mode when using a data router (#10435)
Updated dependencies:
- @remix-run/router@1.6.1

6.11.0

Patch Changes

Log loader/action errors to the console in dev for easier stack trace evaluation (#10286)
Fix bug preventing rendering of descendant <Routes> when RouterProvider errors existed (#10374)
Fix inadvertent re-renders when using Component instead of element on a route definition (#10287)
Fix detection of useNavigate in the render cycle by setting the activeRef in a layout effect, allowing the navigate function to be passed to child components and called in a useEffect there. (#10394)
Switched from useSyncExternalStore to useState for internal @remix-run/router router state syncing in <RouterProvider>. We found some subtle bugs where router state updates got propagated before other normal useState updates, which could lead to footguns in useEffect calls. (#10377, #10409)
Allow useRevalidator() to resolve a loader-driven error boundary scenario (#10369)
Avoid unnecessary unsubscribe/resubscribes on router state changes (#10409)
When using a RouterProvider, useNavigate/useSubmit/fetcher.submit are now stable across location changes, since we can handle relative routing via the @remix-run/router instance and get rid of our dependence on useLocation(). When using BrowserRouter, these hooks remain unstable across location changes because they still rely on useLocation(). (#10336)
Updated dependencies:
- @remix-run/router@1.6.0

6.10.0

Minor Changes

Added support for Future Flags in React Router. The first flag being introduced is future.v7_normalizeFormMethod which will normalize the exposed useNavigation()/useFetcher() formMethod fields as uppercase HTTP methods to align with the fetch() behavior. (#10207)
- When future.v7_normalizeFormMethod === false (default v6 behavior),
  - useNavigation().formMethod is lowercase
  - useFetcher().formMethod is lowercase
- When future.v7_normalizeFormMethod === true:
  - useNavigation().formMethod is uppercase
  - useFetcher().formMethod is uppercase

Patch Changes

Fix route ID generation when using Fragments in createRoutesFromElements (#10193)
Updated dependencies:
- @remix-run/router@1.5.0

6.9.0

Minor Changes

React Router now supports an alternative way to define your route element and errorElement fields as React Components instead of React Elements. You can instead pass a React Component to the new Component and ErrorBoundary fields if you choose. There is no functional difference between the two, so use whichever approach you prefer 😀. You shouldn't be defining both, but if you do Component/ErrorBoundary will "win". (#10045)

Example JSON Syntax

// Both of these work the same:
const elementRoutes = [{
  path: '/',
  element: <Home />,
  errorElement: <HomeError />,
}]

const componentRoutes = [{
  path: '/',
  Component: Home,
  ErrorBoundary: HomeError,
}]

function Home() { ... }
function HomeError() { ... }

Example JSX Syntax

// Both of these work the same:
const elementRoutes = createRoutesFromElements(
  <Route path='/' element={<Home />} errorElement={<HomeError /> } />
);

const componentRoutes = createRoutesFromElements(
  <Route path='/' Component={Home} ErrorBoundary={HomeError} />
);

function Home() { ... }
function HomeError() { ... }

Introducing Lazy Route Modules! (#10045)

In order to keep your application bundles small and support code-splitting of your routes, we've introduced a new lazy() route property. This is an async function that resolves the non-route-matching portions of your route definition (loader, action, element/Component, errorElement/ErrorBoundary, shouldRevalidate, handle).

Lazy routes are resolved on initial load and during the loading or submitting phase of a navigation or fetcher call. You cannot lazily define route-matching properties (path, index, children) since we only execute your lazy route functions after we've matched known routes.

Your lazy functions will typically return the result of a dynamic import.

// In this example, we assume most folks land on the homepage so we include that
// in our critical-path bundle, but then we lazily load modules for /a and /b so
// they don't load until the user navigates to those routes
let routes = createRoutesFromElements(
  <Route path="/" element={<Layout />}>
    <Route index element={<Home />} />
    <Route path="a" lazy={() => import("./a")} />
    <Route path="b" lazy={() => import("./b")} />
  </Route>,
);

Then in your lazy route modules, export the properties you want defined for the route:

export async function loader({ request }) {
  let data = await fetchData(request);
  return json(data);
}

// Export a `Component` directly instead of needing to create a React Element from it
export function Component() {
  let data = useLoaderData();

  return (
    <>
      <h1>You made it!</h1>
      <p>{data}</p>
    </>
  );
}

// Export an `ErrorBoundary` directly instead of needing to create a React Element from it
export function ErrorBoundary() {
  let error = useRouteError();
  return isRouteErrorResponse(error) ? (
    <h1>
      {error.status} {error.statusText}
    </h1>
  ) : (
    <h1>{error.message || error}</h1>
  );
}

An example of this in action can be found in the examples/lazy-loading-router-provider directory of the repository.

🙌 Huge thanks to @rossipedia for the Initial Proposal and POC Implementation.

Updated dependencies:
- @remix-run/router@1.4.0

Patch Changes

Fix generatePath incorrectly applying parameters in some cases (#10078)
Improve memoization for context providers to avoid unnecessary re-renders (#9983)

6.8.2

Patch Changes

Updated dependencies:
- @remix-run/router@1.3.3

6.8.1

Patch Changes

Remove inaccurate console warning for POP navigations and update active blocker logic (#10030)
Updated dependencies:
- @remix-run/router@1.3.2

6.8.0

Patch Changes

Updated dependencies:
- @remix-run/router@1.3.1

6.7.0

Minor Changes

Add unstable_useBlocker hook for blocking navigations within the app's location origin (#9709)

Patch Changes

Fix generatePath when optional params are present (#9764)
Update <Await> to accept ReactNode as children function return result (#9896)
Updated dependencies:
- @remix-run/router@1.3.0

6.6.2

Patch Changes

Ensure useId consistency during SSR (#9805)

6.6.1

Patch Changes

Updated dependencies:
- @remix-run/router@1.2.1

6.6.0

Patch Changes

Prevent useLoaderData usage in errorElement (#9735)
Updated dependencies:
- @remix-run/router@1.2.0

6.5.0

This release introduces support for Optional Route Segments. Now, adding a ? to the end of any path segment will make that entire segment optional. This works for both static segments and dynamic parameters.

Optional Params Examples

<Route path=":lang?/about> will match:
- /:lang/about
- /about
<Route path="/multistep/:widget1?/widget2?/widget3?"> will match:
- /multistep
- /multistep/:widget1
- /multistep/:widget1/:widget2
- /multistep/:widget1/:widget2/:widget3

Optional Static Segment Example

<Route path="/home?"> will match:
- /
- /home
<Route path="/fr?/about"> will match:
- /about
- /fr/about

Minor Changes

Allows optional routes and optional static segments (#9650)

Patch Changes

Stop incorrectly matching on partial named parameters, i.e. <Route path="prefix-:param">, to align with how splat parameters work. If you were previously relying on this behavior then it's recommended to extract the static portion of the path at the useParams call site: (#9506)

// Old behavior at URL /prefix-123
<Route path="prefix-:id" element={<Comp /> }>

function Comp() {
  let params = useParams(); // { id: '123' }
  let id = params.id; // "123"
  ...
}

// New behavior at URL /prefix-123
<Route path=":id" element={<Comp /> }>

function Comp() {
  let params = useParams(); // { id: 'prefix-123' }
  let id = params.id.replace(/^prefix-/, ''); // "123"
  ...
}

Updated dependencies:
- @remix-run/router@1.1.0

6.4.5

Patch Changes

Updated dependencies:
- @remix-run/router@1.0.5

6.4.4

Patch Changes

Updated dependencies:
- @remix-run/router@1.0.4

6.4.3

Patch Changes

useRoutes should be able to return null when passing locationArg (#9485)
fix initialEntries type in createMemoryRouter (#9498)
Updated dependencies:
- @remix-run/router@1.0.3

6.4.2

Patch Changes

Fix IndexRouteObject and NonIndexRouteObject types to make hasErrorElement optional (#9394)
Enhance console error messages for invalid usage of data router hooks (#9311)
If an index route has children, it will result in a runtime error. We have strengthened our RouteObject/RouteProps types to surface the error in TypeScript. (#9366)
Updated dependencies:
- @remix-run/router@1.0.2

6.4.1

Patch Changes

Preserve state from initialEntries (#9288)
Updated dependencies:
- @remix-run/router@1.0.1

6.4.0

Whoa this is a big one! 6.4.0 brings all the data loading and mutation APIs over from Remix. Here's a quick high level overview, but it's recommended you go check out the docs, especially the feature overview and the tutorial.

New APIs

Create your router with createMemoryRouter
Render your router with <RouterProvider>
Load data with a Route loader and mutate with a Route action
Handle errors with Route errorElement
Defer non-critical data with defer and Await

Bug Fixes

Path resolution is now trailing slash agnostic (#8861)
useLocation returns the scoped location inside a <Routes location> component (#9094)

Updated Dependencies

@remix-run/router@1.0.0

Package detail

readme

Packages

Previous Versions

changelog

react-router

7.9.4

Patch Changes

7.9.3

Patch Changes

7.9.2

Patch Changes

7.9.1

Patch Changes

7.9.0

Minor Changes

Patch Changes

7.8.2

Patch Changes

7.8.1

Patch Changes

7.8.0

Minor Changes

Patch Changes

7.7.1

Patch Changes

7.7.0

Minor Changes

Patch Changes

7.6.3

Patch Changes

7.6.2

Patch Changes

7.6.1

Patch Changes

7.6.0

Minor Changes

Patch Changes

7.5.3

Patch Changes

7.5.2

Patch Changes

7.5.1

Patch Changes

7.5.0

Minor Changes

Patch Changes

7.4.1

Patch Changes

7.4.0

Patch Changes

7.3.0

Minor Changes

Patch Changes

7.2.0

Minor Changes

Patch Changes

7.1.5

Patch Changes

7.1.4

Patch Changes

7.1.3

7.1.2

Patch Changes

7.1.1

7.1.0

Patch Changes

7.0.2

Patch Changes

7.0.1

7.0.0

Major Changes

Minor Changes

Typesafety improvements (#12019)

Patch Changes

6.28.0

Minor Changes

Patch Changes

6.27.0

Minor Changes

`react-router`