This page lists all releases/release notes for React Router back to v6.0.0. For releases prior to v6, please refer to the Github Releases Page.
We manage release notes in this file instead of the paginated Github Releases Page for 2 reasons:
Date: 2024-05-10
undefined to be resolved through <Await> (#11513)document check when checking for document.startViewTransition availability (#11544)react-router-dom/server import back to react-router-dom instead of index.ts (#11514)@remix-run/router - Support unstable_dataStrategy on staticHandler.queryRoute (#11515)Full Changelog: v6.23.0...v6.23.1
Date: 2024-04-23
The new unstable_dataStrategy API is a low-level API designed for advanced use-cases where you need to take control over the data strategy for your loader/action functions. 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", user-land middleware/context APIs, automatic loader caching, and more. Please see the docs for more information.
Note: This is a low-level API intended for advanced use-cases. This overrides React Router's internal handling of loader/action execution, and if done incorrectly will break your app code. Please use with caution and perform the appropriate testing.
Currently, all active loader's revalidate after any action submission, regardless of the action result. However, in the majority of cases a 4xx/5xx response from an action means that no data was actually changed and the revalidation is unnecessary. We've introduced a new future.unstable_skipActionErrorRevalidation flag that changes the behavior here, and we plan to make this the default in future version of React Router.
With this flag enabled, action's that return/throw a 4xx/5xx response status will no longer automatically revalidate. If you need to revalidate after a 4xx/5xx result with this flag enabled, you can still do that via returning true from shouldRevalidate - which now also receives a new unstable_actionStatus argument alongside actionResult so you can make decision based on the status of the action response without having to encode it into the action data.
unstable_dataStrategy configuration option (#11098, #11377)@remix-run/router - Add a new future.unstable_skipActionRevalidation future flag (#11098)@remix-run/router - SSR: Added a new skipLoaderErrorBubbling options to the staticHandler.query method to disable error bubbling by the static handler for use in Remix's Single Fetch implementation (#11098, (#11377))Full Changelog: v6.22.3...v6.23.0
Date: 2024-03-07
future.v7_partialHydration bug that would re-run loaders below the boundary on hydration if SSR loader errors bubbled to a parent boundary (#11324)future.v7_partialHydration bug that would consider the router uninitialized if a route did not have a loader (#11325)Full Changelog: v6.22.2...v6.22.3
Date: 2024-02-28
Full Changelog: v6.22.1...v6.22.2
Date: 2024-02-16
Full Changelog: v6.22.0...v6.22.1
Date: 2024-02-01
In 2021, the HTTP Archive launched the Core Web Vitals Technology Report dashboard:
By combining the powers of real-user experiences in the Chrome UX Report 26 (CrUX) dataset with web technology detections in HTTP Archive 30, we can get a glimpse into how architectural decisions like choices of CMS platform or JavaScript framework play a role in sites’ CWV performance.
They use a tool called wappalyzer to identify what technologies a given website is using by looking for certain scripts, global JS variables, or other identifying characteristics. For example, for Remix applications, they look for the global __remixContext variable to identify that a website is using Remix.
It was brought to our attention that React Router was unable to be reliably identified because there are no identifying global aspects. They are currently looking for external scripts with react-router in the name. This will identify sites using React Router from a CDN such as unpkg - but it will miss the vast majority of sites that are installing React Router from the npm registry and bundling it into their JS files. This results in drastically under-reporting the usage of React Router on the web.
Starting with version 6.22.0, sites using react-router-dom will begin adding a window.__reactRouterVersion variable that will be set to a string value of the SemVer major version number (i.e., window.__reactRouterVersion = "6";) so that they can be properly identified.
window.__reactRouterVersion for CWV Report detection (#11222)createStaticHandler future.v7_throwAbortReason flag to throw request.signal.reason (defaults to a DOMException) when a request is aborted instead of an Error such as new Error("query() call aborted: GET /path") (#11104)
DOMException was added in Node v17 so you will not get a DOMException on Node 16 and below.ErrorResponse status code if passed to getStaticContextFormError (#11213)Full Changelog: v6.21.3...v6.22.0
Date: 2024-01-18
NavLink isPending when a basename is used (#11195)unstable_ prefix from Blocker/BlockerFunction types (#11187)Full Changelog: v6.21.2...v6.21.3
Date: 2024-01-11
useId for internal fetcher keys when available (#11166)Full Changelog: v6.21.1...v6.21.2
Date: 2023-12-21
route.lazy not working correctly on initial SPA load when v7_partialHydration is specified (#11121)submitting phase (#11102)resolveTo (#11097)Full Changelog: v6.21.0...v6.21.1
Date: 2023-12-13
future.v7_relativeSplatPathWe fixed a splat route path-resolution bug in 6.19.0, but later determined a large number of applications were relying on the buggy behavior, so we reverted the fix in 6.20.1 (see #10983, #11052, #11078).
The buggy behavior is that the default behavior when resolving relative paths inside a splat route would ignore any splat (*) portion of the current route path. When the future flag is enabled, splat portions are included in relative path logic within splat routes.
For more information, please refer to the useResolvedPath docs and/or the detailed changelog entry.
We added a new future.v7_partialHydration future flag for the @remix-run/router that enables partial hydration of a data router when Server-Side Rendering. This allows you to provide hydrationData.loaderData that has values for some initially matched route loaders, but not all. When this flag is enabled, the router will call loader functions for routes that do not have hydration loader data during router.initialize(), and it will render down to the deepest provided HydrateFallback (up to the first route without hydration data) while it executes the unhydrated routes. (#11033)
future.v7_relativeSplatPath flag to implement a breaking bug fix to relative routing when inside a splat route. (#11087)future.v7_partialHydration future flag that enables partial hydration of a data router when Server-Side Rendering (#11033)ErrorBoundary's (#11071)loader/action functions (#11061)relative="path" issue when rendering Link/NavLink outside of matched routes (#11062)Full Changelog: v6.20.1...v6.21.0
Date: 2023-12-01
useResolvedPath fix for splat routes due to a large number of applications that were relying on the buggy behavior (see #11052) (#11078)
6.19.0 and 6.20.0. If you are upgrading from 6.18.0 or earlier, you would not have been impacted by this fix.Full Changelog: v6.20.0...v6.20.1
Date: 2023-11-22
[!WARNING] Please use version
6.20.1or later instead of6.20.0. We discovered that a large number of apps were relying on buggy behavior that was fixed in this release (#11045). We reverted the fix in6.20.1and will be re-introducing it behind a future flag in a subsequent release. See #11052 for more details.
PathParam type from the public API (#10719)v7_fetcherPersist is enabled (#11044)resolveTo path resolution in splat routes (#11045)
getPathContributingMatchesUNSAFE_getPathContributingMatches export from @remix-run/router since we no longer need this in the react-router/react-router-dom layersFull Changelog: v6.19.0...v6.20.0
Date: 2023-11-16
[!WARNING] Please use version
6.20.1or later instead of6.19.0. We discovered that a large number of apps were relying on buggy behavior that was fixed in this release (#10983). We reverted the fix in6.20.1and will be re-introducing it behind a future flag in a subsequent release. See #11052 for more details.
unstable_flushSync APIThis release brings a new unstable_flushSync option to the imperative APIs (useSubmit, useNavigate, fetcher.submit, fetcher.load) to let users opt-into synchronous DOM updates for pending/optimistic UI.
function handleClick() {
submit(data, { flushSync: true });
// Everything is flushed to the DOM so you can focus/scroll to your pending/optimistic UI
setFocusAndOrScrollToNewlyAddedThing();
}
unstable_flushSync option to useNavigate/useSubmit/fetcher.load/fetcher.submit to opt-out of React.startTransition and into ReactDOM.flushSync for state updates (#11005)unstable_ prefix from the useBlocker hook as it's been in use for enough time that we are confident in the API (#10991)
unstable_usePrompt due to differences in how browsers handle window.confirm that prevent React Router from guaranteeing consistent/correct behaviorFix 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)
"." 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.Fix issue where a changing fetcher key in a useFetcher that remains mounted wasn't getting picked up (#11009)
Fix useFormAction which was incorrectly inheriting the ?index query param from child route action submissions (#11025)
Fix NavLink active logic when to location has a trailing slash (#10734)
Fix types so unstable_usePrompt can accept a BlockerFunction in addition to a boolean (#10991)
Fix relative="path" bug where relative path calculations started from the full location pathname, instead of from the current contextual route pathname. (#11006)
<Route path="/a">
<Route path="/b" element={<Component />}>
<Route path="/c" />
</Route>
</Route>;
function Component() {
return (
<>
{/* This is now correctly relative to /a/b, not /a/b/c */}
<Link to=".." relative="path" />
<Outlet />
</>
);
}
Full Changelog: 6.18.0...6.19.0
Date: 2023-10-31
Per this RFC, we've introduced some new APIs that give you more granular control over your fetcher behaviors.
useFetcher({ key: string }), which allows you to access the same fetcher instance from different components in your application without prop-drillinguseFetchers so that they can be looked up by keyForm and useSumbit now support optional navigate/fetcherKey props/params to allow kicking off a fetcher submission under the hood with an optionally user-specified key
<Form method="post" navigate={false} fetcherKey="my-key">submit(data, { method: "post", navigate: false, fetcherKey: "my-key" })useFetchers() or useFetcher({ key }) to look it up elsewherefuture.v7_fetcherPersist)Per the same RFC as above, we've introduced a new future.v7_fetcherPersist flag that allows you to opt-into the new fetcher persistence/cleanup behavior. Instead of being immediately cleaned up on unmount, fetchers will persist until they return to an idle state. This makes pending/optimistic UI much easier in scenarios where the originating fetcher needs to unmount.
useFetchers() API was always supposed to only reflect in-flight fetcher information for pending/optimistic UI -- it was not intended to reflect fetcher data or hang onto fetchers after they returned to an idle stateuseFetchers() after completion - they served no purpose in there since you can access the data via useFetcher().dataidle state
useFetchers while in-flight so you can still access pending/optimistic data after unmountkey, then it's result will be processed, even if the originating fetcher was unmountedkey APIs and navigate=false options (#10960)future.v7_fetcherPersist flag (#10962)matchPath (#10768)future prop on BrowserRouter, HashRouter and MemoryRouter so that it accepts a Partial<FutureConfig> instead of requiring all flags to be included (#10962)router.getFetcher/router.deleteFetcher type definitions which incorrectly specified key as an optional parameter (#10960)Full Changelog: 6.17.0...6.18.0
Date: 2023-10-16
We're excited to release experimental support for the the View Transitions API in React Router! You can now trigger navigational DOM updates to be wrapped in document.startViewTransition to enable CSS animated transitions on SPA navigations in your application.
The simplest approach to enabling a View Transition in your React Router app is via the new <Link unstable_viewTransition> prop. This will cause the navigation DOM update to be wrapped in document.startViewTransition which will enable transitions for the DOM update. Without any additional CSS styles, you'll get a basic cross-fade animation for your page.
If you need to apply more fine-grained styles for your animations, you can leverage the unstable_useViewTransitionState hook which will tell you when a transition is in progress and you can use that to apply classes or styles:
function ImageLink(to, src, alt) {
const isTransitioning = unstable_useViewTransitionState(to);
return (
<Link to={to} unstable_viewTransition>
<img
src={src}
alt={alt}
style={{
viewTransitionName: isTransitioning ? "image-expand" : "",
}}
/>
</Link>
);
}
You can also use the <NavLink unstable_viewTransition> shorthand which will manage the hook usage for you and automatically add a transitioning class to the <a> during the transition:
a.transitioning img {
view-transition-name: "image-expand";
}
<NavLink to={to} unstable_viewTransition>
<img src={src} alt={alt} />
</NavLink>
For an example usage of View Transitions, check out our fork of the awesome Astro Records demo.
For more information on using the View Transitions API, please refer to the Smooth and simple transitions with the View Transitions API guide from the Google Chrome team.
ScrollRestoration when sessionStorage is unavailable (#10848)RouterProvider future prop type to be a Partial<FutureConfig> so that not all flags must be specified (#10900)ErrorResponse type to avoid leaking internal field (#10876)Full Changelog: 6.16.0...6.17.0
Date: 2023-09-13
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 valueActionFunctionArgs/ActionFunction/LoaderFunctionArgs/LoaderFunction now accept a generic for the context parameter (only used in SSR usages via createStaticHandler)useMatches (now exported as UIMatch) accepts generics for match.data and match.handle - both of which were already set to unknown@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)ShouldRevalidateFunctionArgs interface (#10797)_isFetchActionRedirect, _hasFetcherDoneAnything) (#10715)query/queryRoute calls (#10793)route.lazy routes (#10778)actionResult on the arguments object passed to shouldRevalidate (#10779)Full Changelog: v6.15.0...v6.16.0
Date: 2023-08-10
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)useRevalidator is referentially stable across re-renders if revalidations are not actively occurring (#10707)URLSearchParams and the useSearchParams hook (#10620)unstable_usePrompt to avoid throwing an exception if the prompt is unblocked and a navigation is performed synchronously (#10687, #10718)useFormAction() for unspecified actions since it cannot be determined on the server and causes hydration issues (#10758)queryRoute that was not always identifying thrown Response instances (#10717)react-router-native: Update @ungap/url-search-params dependency from ^0.1.4 to ^0.2.2 (#10590)Full Changelog: v6.14.2...v6.15.0
Date: 2023-07-17
<Form state> prop to populate history.state on submission navigations (#10630)defer promise resolves/rejects with undefined in order to match the behavior of loaders and actions which must return a value or null (#10690)<ScrollRestoration> (#10682)Route.lazy to prohibit returning an empty object (#10634)Error subclasses such as ReferenceError/TypeError (#10633)Full Changelog: v6.14.1...v6.14.2
Date: 2023-06-30
unstable_useBlocker when used with an unstable blocker function (#10652)@remix-run/router@1.7.1Full Changelog: v6.14.0...v6.14.1
Date: 2023-06-23
6.14.0 adds support for JSON and Text submissions via useSubmit/fetcher.submit since it's not always convenient to have to serialize into FormData if you're working in a client-side SPA. To opt-into these encodings you just need to specify the proper formEncType:
Opt-into application/json encoding:
function Component() {
let navigation = useNavigation();
let submit = useSubmit();
submit({ key: "value" }, { method: "post", encType: "application/json" });
// navigation.formEncType => "application/json"
// navigation.json => { key: "value" }
}
async function action({ request }) {
// request.headers.get("Content-Type") => "application/json"
// await request.json() => { key: "value" }
}
Opt-into text/plain encoding:
function Component() {
let navigation = useNavigation();
let submit = useSubmit();
submit("Text submission", { method: "post", encType: "text/plain" });
// navigation.formEncType => "text/plain"
// navigation.text => "Text submission"
}
async function action({ request }) {
// request.headers.get("Content-Type") => "text/plain"
// await request.text() => "Text submission"
}
⚠️ Default Behavior Will Change in v7
Please note that to avoid a breaking change, the default behavior will still encode a simple key/value JSON object into a FormData instance:
function Component() {
let navigation = useNavigation();
let submit = useSubmit();
submit({ key: "value" }, { method: "post" });
// navigation.formEncType => "application/x-www-form-urlencoded"
// navigation.formData => FormData instance
}
async function action({ request }) {
// request.headers.get("Content-Type") => "application/x-www-form-urlencoded"
// await request.formData() => FormData instance
}
This behavior will likely change in v7 so it's best to make any JSON object submissions explicit with formEncType: "application/x-www-form-urlencoded" or formEncType: "application/json" to ease your eventual v7 migration path.
application/json and text/plain encodings for useSubmit/fetcher.submit. To reflect these additional types, useNavigation/useFetcher now also contain navigation.json/navigation.text and fetcher.json/fetcher.text which include the json/text submission if applicable. (#10413)submitter element, prefer the built-in new FormData(form, submitter) instead of the previous manual approach in modern browsers (those that support the new submitter parameter) (#9865)
type="image" buttonsformdata-submitter-polyfillwindow.history.pushState/replaceState before updating React Router state (instead of after) so that window.location matches useLocation during synchronous React 17 rendering (#10448)
window.location and should always reference useLocation when possible, as window.location will not be in sync 100% of the time (due to popstate events, concurrent mode, etc.)shouldRevalidate for fetchers that have not yet completed a data load (#10623)basename from the location provided to <ScrollRestoration getKey> to match the useLocation behavior (#10550)basename from locations provided to unstable_useBlocker functions to match the useLocation behavior (#10573)unstable_useBlocker key issues in StrictMode (#10573)generatePath when passed a numeric 0 value parameter (#10612)tsc --skipLibCheck:false issues on React 17 (#10622)typescript to 5.1 (#10581)Full Changelog: v6.13.0...v6.14.0
Date: 2023-06-14
6.13.0 is really a patch release in spirit but comes with a SemVer minor bump since we added a new future flag.
The tl;dr; is that 6.13.0 is the same as 6.12.0 bue we've moved the usage of React.startTransition behind an opt-in future.v7_startTransition future flag because we found that there are applications in the wild that are currently using Suspense in ways that are incompatible with React.startTransition.
Therefore, in 6.13.0 the default behavior will no longer leverage React.startTransition:
<BrowserRouter>
<Routes>{/*...*/}</Routes>
</BrowserRouter>
<RouterProvider router={router} />
If you wish to enable React.startTransition, pass the future flag to your router component:
<BrowserRouter future={{ v7_startTransition: true }}>
<Routes>{/*...*/}</Routes>
</BrowserRouter>
<RouterProvider router={router} future={{ v7_startTransition: true }}/>
We recommend folks adopt this flag sooner rather than later to be better compatible with React concurrent mode, but if you run into issues you can continue without the use of React.startTransition until v7. Issues usually boil down to creating net-new promises during the render cycle, so if you run into issues when opting into React.startTransition, you should either lift your promise creation out of the render cycle or put it behind a useMemo.
React.startTransition usage behinds a future flag (#10596)React.startTransition minification bug in production mode (#10588)Full Changelog: v6.12.1...v6.13.0
Date: 2023-06-08
[!WARNING] Please use version
6.13.0or later instead of6.12.0/6.12.1. These versions suffered from some Webpack build/minification issues resulting failed builds or invalid minified code in your production bundles. See #10569 and #10579 for more details.
React.startTransition to fix webpack + react 17 compilation error (#10569)Full Changelog: v6.12.0...v6.12.1
Date: 2023-06-06
[!WARNING] Please use version
6.13.0or later instead of6.12.0/6.12.1. These versions suffered from some Webpack build/minification issues resulting failed builds or invalid minified code in your production bundles. See #10569 and #10579 for more details.
React.startTransition supportWith 6.12.0 we've added better support for suspending components by wrapping the internal router state updates in React.startTransition. This means that, for example, if one of your components in a destination route suspends and you have not provided a Suspense boundary to show a fallback, React will delay the rendering of the new UI and show the old UI until that asynchronous operation resolves. This could be useful for waiting for things such as waiting for images or CSS files to load (and technically, yes, you could use it for data loading but we'd still recommend using loaders for that 😀). For a quick overview of this usage, check out Ryan's demo on Twitter.
React.startTransition (#10438)DOMException (DataCloneError) when attempting to perform a PUSH navigation with non-serializable state. (#10427)jest and jsdom (#10453)@remix-run/router@1.6.3 (Changelog)Full Changelog: v6.11.2...v6.12.0
Date: 2023-05-17
basename duplication in descendant <Routes> inside a <RouterProvider> (#10492)SetURLSearchParams type (#10444)manifest in _internalSetRoutes (#10437)Full Changelog: v6.11.1...v6.11.2
Date: 2023-05-03
Component API within descendant <Routes> (#10434)useNavigate from <Routes> inside a <RouterProvider> (#10432)<Navigate> in strict mode when using a data router (#10435)basename handling when navigating without a path (#10433)/path#hash -> /path#hash) (#10408)Full Changelog: v6.11.0...v6.11.1
Date: 2023-04-28
basename support in useFetcher (#10336)
basename then you will need to remove the manually prepended basename from your fetcher calls (fetcher.load('/basename/route') -> fetcher.load('/route'))@remix-run/router@1.6.0 (Changelog)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() (#10336)
BrowserRouter, these hooks remain unstable across location changes because they still rely on useLocation()action submissions or router.revalidate calls (#10344)Component instead of element on a route definition (#10287)<Link to="//"> and other invalid URL values (#10367)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 foot guns in useEffect calls. (#10377, #10409)<Routes> when RouterProvider errors existed (#10374)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)useRevalidator() to resolve a loader-driven error boundary scenario (#10369)LoaderFunction/ActionFunction return type to prevent undefined from being a valid return value (#10267)fetcher.load call to a route without a loader (#10345)AbortController usage between revalidating fetchers and the thing that triggered them such that the unmount/deletion of a revalidating fetcher doesn't impact the ongoing triggering navigation/revalidation (#10271)Full Changelog: v6.10.0...v6.11.0
Date: 2023-03-29
We recently published a post over on the Remix Blog titled "Future Proofing Your Remix App" that goes through our strategy to ensure smooth upgrades for your Remix and React Router apps going forward. React Router 6.10.0 adds support for these flags (for data routers) which you can specify when you create your router:
const router = createBrowserRouter(routes, {
future: {
// specify future flags here
},
});
You can also check out the docs here and here.
The first future 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() (and some Remix) behavior. (#10207)
future.v7_normalizeFormMethod is unspecified or set to false (default v6 behavior),
useNavigation().formMethod is lowercaseuseFetcher().formMethod is lowercasefuture.v7_normalizeFormMethod === true:
useNavigation().formMethod is UPPERCASEuseFetcher().formMethod is UPPERCASEcreateStaticHandler to also check for ErrorBoundary on routes in addition to errorElement (#10190)createRoutesFromElements (#10193)shouldRevalidate if the fetcher action redirects (#10208)lazy() errors during router initialization (#10201)instanceof check for DeferredData to be resilient to ESM/CJS boundaries in SSR bundling scenarios (#10247)@remix-run/web-fetch@4.3.3 (#10216)Full Changelog: v6.9.0...v6.10.0
Date: 2023-03-10
Component/ErrorBoundary route propertiesReact 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"
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() { ... }
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. For more info, check out the lazy docs.
🙌 Huge thanks to @rossipedia for the Initial Proposal and POC Implementation.
route.Component/route.ErrorBoundary properties (#10045)route.lazy (#10045)generatePath incorrectly applying parameters in some cases (#10078)[react-router-dom-v5-compat] Add missed data router API re-exports (#10171)Full Changelog: v6.8.2...v6.9.0
Date: 2023-02-27
<Link to> as external if they are outside of the router basename (#10135)basename (#10076)<Link to> urls (#10112)StaticRouterProvider serialized hydration data (#10068)useBlocker to return IDLE_BLOCKER during SSR (#10046)defer loader responses in createStaticHandler's query() method (#10077)invariant to an UNSAFE_invariant export since it's only intended for internal use (#10066)Full Changelog: v6.8.1...v6.8.2
Date: 2023-02-06
Link component (now also supports mailto: urls) (#9994)Full Changelog: v6.8.0...v6.8.1
Date: 2023-01-26
Support absolute URLs in <Link to>. If the URL is for the current origin, it will still do a client-side navigation. If the URL is for a different origin then it will do a fresh document request for the new origin. (#9900)
<Link to="https://neworigin.com/some/path"> {/* Document request */}
<Link to="//neworigin.com/some/path"> {/* Document request */}
<Link to="https://www.currentorigin.com/path"> {/* Client-side navigation */}
shouldRevalidate calls (#9948)
shouldRevalidate function was only being called for explicit revalidation scenarios (after a mutation, manual useRevalidator call, or an X-Remix-Revalidate header used for cookie setting in Remix). It was not properly being called on implicit revalidation scenarios that also apply to navigation loader revalidation, such as a change in search params or clicking a link for the page we're already on. It's now correctly called in those additional scenarios.current*/next* parameters reflected the static fetcher.load URL (and thus were identical). Instead, they should have reflected the the navigation that triggered the revalidation (as the form* parameters did). These parameters now correctly reflect the triggering navigation.useSearchParams (#9969)preventScrollReset on <fetcher.Form> (#9963)pagehide instead of beforeunload for <ScrollRestoration>. This has better cross-browser support, specifically on Mobile Safari. (#9945)instanceof check from isRouteErrorResponse to avoid bundling issues on the server (#9930)defer call only contains critical data and remove the AbortController (#9965)File FormData entries (#9867)react-router-dom-v5-compat - Fix SSR useLayoutEffect console.error when using CompatRouter (#9820)Full Changelog: v6.7.0...v6.8.0
Date: 2023-01-18
unstable_useBlocker/unstable_usePrompt hooks for blocking navigations within the app's location origin (#9709, #9932)preventScrollReset prop to <Form> (#9886)useBeforeUnload (#9709)generatePath when optional params are present (#9764)<Await> to accept ReactNode as children function return result (#9896)jsdom bug workaround in tests (#9824)Full Changelog: v6.6.2...v6.7.0
Date: 2023-01-09
useId consistency during SSR (#9805)Full Changelog: v6.6.1...v6.6.2
Date: 2022-12-23
shouldRevalidate on action redirects (#9777, #9782)actionData on action redirect to current location (#9772)Full Changelog: v6.6.0...v6.6.1
Date: 2022-12-21
This minor release is primarily to stabilize our SSR APIs for Data Routers now that we've wired up the new RouterProvider in Remix as part of the React Router-ing Remix work.
unstable_ prefix from createStaticHandler/createStaticRouter/StaticRouterProvider (#9738)useBeforeUnload() hook (#9664)<Form method> and useSubmit method values (#9664)<button formmethod> form submission overriddes (#9664)replace on submissions and PUSH on submission to new paths (#9734)useLoaderData usage in errorElement (#9735)Error objects from StaticRouterProvider (#9664)hydrationData (#9664)Full Changelog: v6.5.0...v6.6.0
Date: 2022-12-16
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/:widget3Optional Static Segment Example
<Route path="/home?"> will match:
//home<Route path="/fr?/about"> will match:
/about/fr/about<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"
...
}
headers on loader request's after SSR document action request (#9721)Full Changelog: v6.4.5...v6.5.0
Date: 2022-12-07
GET request (#9680)instanceof Response checks in favor of isResponse (#9690)URL creation in Cloudflare Pages or other non-browser-environments (#9682, #9689)requestContext support to static handler query/queryRoute (#9696)
queryRoute(path, routeId) has been changed to queryRoute(path, { routeId, requestContext })Full Changelog: v6.4.4...v6.4.5
Date: 2022-11-30
action/loader function returns undefined as revalidations need to know whether the loader has previously been executed. undefined also causes issues during SSR stringification for hydration. You should always ensure your loader/action returns a value, and you may return null if you don't wish to return anything. (#9511)basename in static data routers (#9591)ErrorResponse bodies to contain more descriptive text in internal 403/404/405 scenariosNavLink and descendant <Routes> (#9589, #9647)ErrorResponse instances when using built-in hydration (#9593)basename in static data routers (#9591)@remix-run/router@1.0.4react-router@6.4.4Full Changelog: v6.4.3...v6.4.4
Date: 2022-11-01
<a href> values when using createHashRouter (#9409)formAction pathnames when an index route also has a path (#9486)relative=path prop on NavLink (#9453)NavLink behavior for root urls (#9497)useRoutes should be able to return null when passing locationArg (#9485)initialEntries type in createMemoryRouter (#9498)basename and relative routing in loader/action redirects (#9447)action function (#9455)@remix-run/router (#9446)createURL in local file execution in Firefox (#9464)Full Changelog: v6.4.2...v6.4.3
Date: 2022-10-06
basename in useFormAction (#9352)IndexRouteObject and NonIndexRouteObject types to make hasErrorElement optional (#9394)RouteObject/RouteProps types to surface the error in TypeScript. (#9366)Full Changelog: v6.4.1...v6.4.2
Date: 2022-09-22
initialEntries (#9288)?index for fetcher get submissions to index routes (#9312)Full Changelog: v6.4.0...v6.4.1
Date: 2022-09-13
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 react-router APIs
createMemoryRouter<RouterProvider>loader and mutate with a Route actionerrorElementdefer and AwaitNew react-router-dom APIs
createBrowserRouter/createHashRouter<Form> componentuseFetcher()defer and Await<ScrollRestoration><Link relative="path"> (#9160)useLocation returns the scoped location inside a <Routes location> component (#9094)<Link replace> prop if it is defined (#8779)Full Changelog: v6.3.0...v6.4.0
Date: 2022-03-31
Full Changelog: v6.2.2...v6.3.0
Date: 2022-02-28
Full Changelog: v6.2.1...v6.2.2
Date: 2021-12-17
history dependency to 5.2.0.Full Changelog: v6.2.0...v6.2.1
Date: 2021-12-17
RouteProps element type, which should be a ReactNode (#8473)useOutlet for top-level routes (#8483)Full Changelog: v6.1.1...v6.2.0
Date: 2021-12-11
HistoryRouter as unstable_HistoryRouter, as this API will likely need to change before a new major release.Full Changelog: v6.1.0...v6.1.1
Date: 2021-12-10
<Outlet> can now receive a context prop. This value is passed to child routes and is accessible via the new useOutletContext hook. See the API docs for details. (#8461)<NavLink> can now receive a child function for access to its props. (#8164)useMatch and matchPath. For example, when you call useMatch("foo/:bar/:baz"), the path is parsed and the return type will be PathMatch<"bar" | "baz">. (#8030)Full Changelog: v6.0.2...v6.1.0
Date: 2021-11-09
reloadDocument prop to <Link>. This allows <Link> to function like a normal anchor tag by reloading the document after navigation while maintaining the relative to resolution (#8283)Full Changelog: v6.0.1...v6.0.2
Date: 2021-11-05
<StaticRouter location> value (#8243)<Route> inside <Routes> to help people make the change (#8238)Full Changelog: v6.0.0...v6.0.1
Date: 2021-11-03
React Router v6 is here!
Please go read our blog post for more information on all the great stuff in v6 including notes about how to upgrade from React Router v5 and Reach Router.