feat: implement form POST submission interception with route actions#95
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feat: implement form POST submission interception with route actions#95
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Add first-class support for handling HTML form submissions (POST navigations) in the router, following the design document in docs/design/form-submission-interception.md. Key changes: - Add ActionArgs type and createActionRequest helper for POST requests - Extend LoaderArgs with optional actionResult parameter (backwards compatible) - Add action field to InternalRouteDefinition and route definition types - Add route() and routeState() overloads for routes with action + loader and action only - Update executeLoaders to pass actionResult through to loaders - Update NavigationAPIAdapter to detect formData, execute actions, clear loader cache, and revalidate loaders after action completion - Do not intercept POST submissions to routes without an action (let browser handle normally) - Find deepest matched route with action for nested route resolution - Extend OnNavigateInfo with formData field - Export ActionArgs type from public API https://claude.ai/code/session_01FkwmQfvFdApgBDrFosxns9
- Add ActionArgs type documentation to API Types page - Update LoaderArgs documentation to include actionResult parameter - Add action option to route() options table in API Utilities page - Add ActionArgs to server entry point exports list - Add Form Submissions example section to Examples page https://claude.ai/code/session_01FkwmQfvFdApgBDrFosxns9
uhyo
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Feb 15, 2026
Adds a new guestbook feature to the example app that showcases the form action feature from #95. Uses a native <form method="post"> with a route action to handle submissions, and the actionResult flows to the loader for displaying success/error feedback. https://claude.ai/code/session_01REPtDVYRNsT8Me3EfXjQt2
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Add first-class support for handling HTML form submissions (POST navigations)
in the router, following the design document in docs/design/form-submission-interception.md.
Key changes:
and revalidate loaders after action completion
https://claude.ai/code/session_01FkwmQfvFdApgBDrFosxns9