rsnext/test/e2e/app-dir/ppr-navigations/avoid-popstate-flash/next.config.js
Andrew Clark 61803f818a
[PPR Nav] Fix flash of loading state during back/forward (#60578)
### Depends on

- #60577 

---

A popstate navigation reads data from the local cache. It does not issue
new network requests (unless the cache entries have been evicted). So,
when navigating with back/forward, we should not switch back to the PPR
loading state. We should render the full, cached dynamic data
immediately.

To implement this, on a popstate navigation, we update the cache to drop
the prefetch data for any segment whose dynamic data was already
received. We clone the entire cache node tree and set the `prefetchRsc`
field to `null` to prevent it from being rendered. (We can't mutate the
node in place because Cache Node is a concurrent data structure.)

Technically, what we're actually checking is whether the dynamic network
response was received. But since it's a streaming response, this does
not mean that all the dynamic data has fully streamed in. It just means
that _some_ of the dynamic data was received. But as a heuristic, we
assume that the rest dynamic data will stream in quickly, so it's still
better to skip the prefetch state.

Closes NEXT-2084
2024-01-12 14:18:54 -05:00

10 lines
135 B
JavaScript

/**
* @type {import('next').NextConfig}
*/
const nextConfig = {
experimental: {
ppr: true,
},
}
module.exports = nextConfig