remix-run/react-router react-router@6.4.0-pre.9

on GitHub

Patch Changes

• Feat: adds deferred support to data routers (#9002)

  Returning a deferred from a loader allows you to separate critical loader data that you want to wait for prior to rendering the destination page from non-critical data that you are OK to show a spinner for until it loads.

  // In your route loader, return a deferred() and choose per-key whether to
  // await the promise or not.  As soon as the awaited promises resolve, the
  // page will be rendered.
  function loader() {
    return deferred({
      critical: await getCriticalData(),
      lazy: getLazyData(),
    });
  };
  
  // In your route element, grab the values from useLoaderData and render them
  // with <Deferred>
  function DeferredPage() {
    let data = useLoaderData();
    return (
      <>
        <p>Critical Data: {data.critical}</p>
        <Deferred
          value={data.lazy}
          fallback={<p>Loading...</p>}
          errorElement={<RenderDeferredError />}>
          <RenderDeferredData />
        </Deferred>
      </>
    );
  }
  
  // Use separate components to render the data once it resolves, and access it
  // via the useDeferredData hook
  function RenderDeferredData() {
    let data = useDeferredData();
    return <p>Lazy: {data}</p>;
  }
  
  function RenderDeferredError() {
    let data = useRouteError();
    return <p>Error! {data.message} {data.stack}</p>;
  }

  If you want to skip the separate components, you can use the Render Props
  pattern and handle the rendering of the deferred data inline:

  function DeferredPage() {
    let data = useLoaderData();
    return (
      <>
        <p>Critical Data: {data.critical}</p>
        <Deferred value={data.lazy} fallback={<p>Loading...</p>}>
          {(data) => <p>{data}</p>}
        </Deferred>
      </>
    );
  }

• feat: add basename support for data routers (#9026)

• fix: Fix trailing slash behavior on pathless routing when using a basename (#9045)

• Updated dependencies

  • @remix-run/router@0.2.0-pre.4