[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
react-router (source)	^8.4.0 → ^8.5.1

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Release Notes

remix-run/react-router (react-router)

v8.5.1

Compare Source

Patch Changes

• Fix URIError: URI malformed when an ssr: false dev server receives a URL path with a malformed percent-encoding (#​15649)
• Bound server route manifest processing for paths with expensive route expansion (#​15703)
  • Fall back to initial route discovery during server rendering and RSC document/data requests
  • Account for the number and depth of candidate branches when using regex matching
• Encode commas within paths sent to the lazy route discovery manifest endpoint so routes with commas in their paths are discovered correctly (#​15640)
• Fix fetcher revalidation errors bubbling to the root error boundary instead of the nearest boundary above the route that owns the fetcher (#​15676)
• Avoid duplicate history entries when posting a <Form> to the current URL with an encoded action (#​15679)
  • Replace the current history entry when the action contains characters that get percent-encoded, such as spaces or non-ASCII characters
• Fix an unhandled promise rejection when the browser skips a viewTransition navigation, for example in a hidden tab (#​15582)
• Bubble rejected lazy.Component imports on loader-less routes to the nearest error boundary (#​15658)
  • Render the error boundary instead of a blank page
• Preserve pending fetcher mutation revalidation when an older navigation or background reload completes to prevent stale loader data (#​15686)
  • Keep newer fetcher loads cancellable and preserve them when earlier revalidations finish or abort, preventing older responses from overwriting fresh fetcher data
• Retry rejected lazy route imports instead of caching failures permanently (#​15689)
• Revalidate loader data when a fetcher action redirect is not followed (#​15557)
  • Revalidate when an action redirect is ignored because a newer navigation started or the fetcher unmounted while the action was running
  • Include shared parent loaders when another navigation completed while the action was running
  • Continue to respect shouldRevalidate
  • Return fetchers to idle when a revalidation completes a pending navigation started by another fetcher's redirect
• Avoid adding an incompatible document.startViewTransition() overload to the global Document type (#​15680)
  • Allow transition results to be assigned to the DOM ViewTransition type
• Skip deleteData in destroySession when the session has no ID (#​15639)
  • Avoid failures when destroying a session without a cookie on storage that rejects an empty key
• Surface the host's 404 response when a SPA fallback route has no prerendered data (#​15646)
  • Request single-fetch .data files for hydrating routes with a server loader in an ssr: false app with a prerender config
  • Avoid the internal "No result found for routeId" error for non-prerendered parameterized paths served via the SPA fallback
• Improve turbo-stream decoding validation and object property handling (18e1fbd)

Unstable Changes

⚠️ Unstable features are not recommended for production use

• Add an opt-in <Await unstable_promise={promise}> implementation based on React's use() API (#​15678)
  • Use React.use instead of React Router's internal promise tracking
  • Accept promise-like values and retain errorElement, useAsyncValue, and useAsyncError support
  • Handle only promise rejections with errorElement when using unstable_promise, allowing child render errors to bubble to the nearest React error boundary
  • Track streamed promises during decoding so settled server content stays visible during hydration updates with either Await API or direct React.use()
• Fix URIError: URI malformed when an API-only (ssr: "unstable_api-only") server receives a URL path with a malformed percent-encoding (#​15649)
• Fix duplicate headers when throwing a redirect from an RSC server function (#​15667)

v8.5.0

Compare Source

Minor Changes

• Deprecate React Router's view transition APIs in favor of React's <ViewTransition> component, available in React 19.3 and later (#​15493)
  • Deprecate the viewTransition props/options, useViewTransitionState, and NavLink's isTransitioning render prop and transitioning class
  • Preserve existing behavior, including support for older React versions
  • See the migration guide for a navigation example and compatibility considerations

Patch Changes

• Fix <Await> failing to server render promises decoded from an RSC payload, which caused the Suspense boundary to switch to client rendering (#​15597)
• Declare @types/react and @types/react-dom as optional peer dependencies so the shipped type definitions resolve React types under strict (non-hoisted) node_modules layouts (#​15528)
• Fix the unstable_useRouterState documentation example to call the imported alias (#​15535)
• Render the HydrateFallback of a route discovered through patchRoutesOnNavigation during initial hydration (#​15537)
  • Routes discovered during initial hydration are now exposed in state.matches while their loaders run, so <RouterProvider> renders down to the discovered route's HydrateFallback instead of rendering nothing
• Fix router state recovery when updates occur before RouterProvider subscribes, including when other subscribers are already attached, and report current client errors once without replaying server errors during hydration (#​15637)
• Fix matchPath not treating a static segment as optional when it contains characters outside [\w-] (#​15425)
• Fix an RSC server crash when a client aborts a document request while the HTML stream waits for the RSC payload (#​15612)
• Stop revalidating a fetcher after fetcher.reset(), so its cleared data no longer comes back on the next revalidation (#​15633)

Unstable Changes

⚠️ Unstable features are not recommended for production use

• Add an unstable_fetch prop to <HydratedRouter> to customize JavaScript-issued manifest and server data requests in conventional Framework Mode (#​15586)
  • The function receives the intended request as well as context identifying the type of request
  • Data request context includes navigationType ("PUSH", "REPLACE", or "POP" for navigation-initiated requests, including reloaded fetchers; null otherwise)
    • Data strategies receive equivalent metadata through unstable_initiator and unstable_navigationType
  • The custom fetch context is a discriminated union, so narrowing type to "navigation" guarantees a non-null navigationType, while other data requests have a null navigationType
    • Fetchers reloaded after an initialization redirect retain the "initialization" type and include their fetcher key
  • Like other router initialization options, the implementation is captured when the singleton router is created and thus subsequent prop changes are ignored
  • Browser-managed data prefetches from <Link prefetch> use native <link rel="prefetch"> elements and do not call the custom implementation
  • Use the callback for custom fetch options, custom headers, safe request retries, or response header inspection
  • Return response bodies unchanged so React Router can decode its manifest and Turbo Stream data protocols
• Support API-only Framework Mode with runtime server data loading, actions, revalidation, and lazy route discovery (#​15601)
  • Hydrate prerendered pages from build-time data and fetch server loader data when hydrating a SPA fallback
  • Preserve normal loader revalidation and server-action support for eagerly loaded and lazily discovered routes, and honor loader opt-outs when making server data requests
• Add unstable_useRouteDiscovery for application-controlled route discovery in conventional Framework Mode (#​15602)
  • Discover selected destinations or load the running client's full route manifest without loading route modules
  • Compose manifest-mismatch handlers, with shared recovery and cancellation that preserves application state
  • Keep full-manifest failures catchable without rendering error boundaries, whether mismatch handlers use the hook or event's loadAllRoutes()
  • Cancel pending revalidation alongside a canceled navigation, retaining existing data and settling interrupted fetchers before restoring Back/Forward history
  • Enable future.unstable_customRouteDiscovery to opt in
    • Apps without the flag retain existing discovery behavior
  • Call event.defaultBehavior() from a custom mismatch handler to explicitly run built-in recovery
• Return middleware short-circuit responses as-is for document requests in RSC modes, including resource routes, instead of decoding non-RSC bodies as Flight (#​15628)
  • Include server middleware in both eager and lazy RSC route configuration types
  • Preserve HTML rendering for cached Flight responses returned by middleware, and pass through raw responses that replace the result of next()

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