Hendrik LiebauandGitHub 824fcd63f8 Opt Partial Prefetching routes into the runtime stage of Cached Navs (#95097) ...

In #95064 we added a global opt-in to the runtime stage of Cached
Navigations: setting `cachedNavigations: 'allow-runtime'` makes every
route runtime-cache, on top of the existing per-segment `prefetch =
'allow-runtime'`. This extends the opt-in: a `prefetch` config of
`'partial'`, `'unstable_eager'`, or `'allow-runtime'` all enable Partial
Prefetching for a route, and a route already doing PPR-style partial
prefetching should also runtime-cache its navigations. The next-config
`partialPrefetching`, which enables Partial Prefetching globally, opts
every route in as well.

Both runtime-prefetch spawn gates in `app-render.tsx` now broaden their
condition to include `partialPrefetching` and any segment `prefetch`
that enables Partial Prefetching, via a new
`anySegmentHasPartialPrefetchingEnabled` helper. The narrower callers
that gate metadata staging and the dev reveal stage keep using
`anySegmentHasRuntimePrefetchEnabled`, since they specifically concern
routes the client runtime-prefetches (`'allow-runtime'`), not partial
ones.

Because `partialPrefetching` has no default and is not auto-enabled by
`cacheComponents`, apps that do not set it are unaffected.

Tests add `prefetch = 'partial'` and `prefetch = 'unstable_eager'`
routes to the existing `default` fixture and a new `partial-prefetching`
fixture for the global config, each asserting the route runtime-caches
its request-derived content on a second navigation without a per-segment
`prefetch = 'allow-runtime'` export.

2026-06-23 21:42:12 +02:00

..

link-accordion.tsx

…

runtime-content.tsx

Opt Partial Prefetching routes into the runtime stage of Cached Navs (#95097)

2026-06-23 21:42:12 +02:00