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#ReactPageCacheProvider

#Import

typescript 
1import { ReactPageCacheProvider } from "alepha/react/router";

#Overview

The automatic page cache (#E78).

Every server-rendered page whose render read nothing personal (see ReadRecorder) is cached, with no option: its shared bytes, everything but the private hydration script, are kept under page:<build>:<name>:<params>:<query>:<lang>. A later request for the same key, signed in or not, gets those bytes followed by a private script built for it, without running a loader or React.

  • Lifetime: a page with no loader anywhere in its layer chain lives until the next deploy (the build is in the key); a page with a loader, 60 s. $page({ cache: { ttl } }) overrides, $page({ cache: false }) opts out.
  • Storage: the app's CacheProvider, so with Redis an entry and its invalidation span instances. The in-memory provider is replaced by a bounded LRU here (it has no size limit of its own), and so is the workerd default, whose edge tier is caches.default, not KV.
  • Kill switch: REACT_PAGE_CACHE=false, or the enabled option.