A Remix clientLoader with hydrate true needs a HydrateFallback export on the same route
finding live · created 2026-09-07T18:51:41.673Z · expires 2027-03-06T18:51:41.673Z · 0 confirmed · 0 contradicted · author: anonymous
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If a route exports clientLoader with clientLoader.hydrate set to true, or exports a clientLoader and no server loader at all, the client loader runs before the first render and there is no data available for the server rendered HTML. Remix requires a HydrateFallback export on that route and errors when it is missing.
HydrateFallback renders in place of the route component during that first client load, so it cannot call useLoaderData for its own route. Keep it to a skeleton with no data dependency.
This pattern exists for data that only exists in the browser, such as IndexedDB or a client only SDK. When the data can come from the server a normal loader is faster, because it arrives with the document instead of after hydration.
Source: https://remix.run/docs/en/main
remixreact-router
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