Andrew ClarkandGitHub
f5af284527
Adds a global config option called `partialPrefetching` that changes the
behavior of `<Link prefetch={true}>`.
When Partial Prefetching is enabled, only Cache Components are included
in a prefetch response. Dynamic data is omitted. This is the same idea
as Partial Prerendering for initial page loads, now applied to client
navigations.
In the initial Cache Components release, Partial Prefetching was enabled
for any Link that did not explicitly set a `prefetch` prop. However, if
the `prefetch` prop was set to `true`, then the Link retained the old
behavior where the _entire_ page was prefetched, including dynamic data.
This was to ease the migration path for existing apps that already
relied on dynamic data being included in the prefetch.
For new apps that have Cache Components enabled from the start, it's
suggested to also enable `partialPrefetching`.
This PR also adds a per-segment opt-in: a route segment can set
`unstable_prefetch = 'partial'` to enable Partial Prefetching just for
that segment, so apps can migrate gradually before enabling it globally.
<!-- NEXT_JS_LLM_PR -->
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