Sourced from react-router-dom's releases.

v6.4.4

What's Changed

• Throw an error if an 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)
• Properly handle redirects to external domains (#9590, #9654)
• Preserve the HTTP method on 307/308 redirects (#9597)
• Support basename in static data routers (#9591)
• Enhanced ErrorResponse bodies to contain more descriptive text in internal 403/404/405 scenarios
• Fix issues with encoded characters in NavLink and descendant <Routes> (#9589, #9647)
• Properly serialize/deserialize ErrorResponse instances when using built-in hydration (#9593)
• Support basename in static data routers (#9591)
• Updated dependencies:
  • @remix-run/[email protected]
  • [email protected]

Full Changelog: https://github.com/remix-run/react-router/compare/[email protected]@6.4.4

[email protected]

Patch Changes

• fix: remove internal router singleton (#9227)

  This change removes the internal module-level routerSingleton we create and maintain inside our data routers since it was causing a number of headaches for non-simple use cases:

  • Unit tests are a pain because you need to find a way to reset the singleton in-between tests
    • Use use a _resetModuleScope singleton for our tests
    • ...but this isn't exposed to users who may want to do their own tests around our router
  • The JSX children <Route> objects cause non-intuitive behavior based on idiomatic react expectations
    • Conditional runtime <Route>'s won't get picked up
    • Adding new <Route>'s during local dev won't get picked up during HMR
    • Using external state in your elements doesn't work as one might expect (see #9225)

  Instead, we are going to lift the singleton out into user-land, so that they create the router singleton and manage it outside the react tree - which is what react 18 is encouraging with useSyncExternalStore anyways! This also means that since users create the router - there's no longer any difference in the rendering aspect for memory/browser/hash routers (which only impacts router/history creation) - so we can get rid of those and trim to a simple RouterProvider

  // Before
  function App() {
    <DataBrowserRouter>
      <Route path="/" element={<Layout />}>
        <Route index element={<Home />}>
      </Route>
    <DataBrowserRouter>
  }
  // After
  let router = createBrowserRouter([{
  path: "/",
  element: <Layout />,
  children: [{
  index: true,

... (truncated)

Sourced from react-router-dom's changelog.

6.18.0

Minor Changes

• Add support for manual fetcher key specification via useFetcher({ key: string }) so you can access the same fetcher instance from different components in your application without prop-drilling (RFC) (#10960)

  • Fetcher keys are now also exposed on the fetchers returned from useFetchers so that they can be looked up by key

• Add navigate/fetcherKey params/props to useSumbit/Form to support kicking off a fetcher submission under the hood with an optionally user-specified key (#10960)

  • Invoking a fetcher in this way is ephemeral and stateless
  • If you need to access the state of one of these fetchers, you will need to leverage useFetcher({ key }) to look it up elsewhere

Patch Changes

• Adds a fetcher context to RouterProvider that holds completed fetcher data, in preparation for the upcoming future flag that will change the fetcher persistence/cleanup behavior (#10961)
• 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/[email protected]
  • [email protected]

6.17.0

Minor Changes

• Add experimental support for the View Transitions API via document.startViewTransition to enable CSS animated transitions on SPA navigations in your application. (#10916)

  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) {
    let 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:

... (truncated)

• 667f936 chore: Update version for release (#10981)
• 67af262 chore: Update version for release (pre) (#10978)
• 1500288 Updates for v7_fetcherPersist post-processing logic (#10977)
• cacc90b chore: Update version for release (pre) (#10966)
• 19af0cf Add future.v7_fetcherPersist flag (#10962)
• cb2d911 Add fetcher data layer (#10961)
• c0dbcd2 Add useFetcher(key) and <Form navigate={false}> (#10960)
• 805924d Revert "Ensure Form contains splat portion of pathname when no action is spec...
• 908a40a Ensure Form contains splat portion of pathname when no action is specified (#...
• a71b4e2 Merge branch 'release-next' into dev
• Additional commits viewable in compare view

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