->revalidate(), ->staleWhileRevalidate(), ->staleIfError(), ->expire()

Override the cache lifetimes of one response, from the controller.

return Inertia::render('Post/Show', ['post' => $post])
    ->revalidate($post->isBreaking() ? 60 : 3600)
    ->staleIfError(604800);

Reference

Inertia\Response::revalidate(?int $seconds): Inertia\Response             // CDN TTL
Inertia\Response::expire(?int $seconds): Inertia\Response                 // stale-while-revalidate = expire - revalidate
Inertia\Response::staleWhileRevalidate(?int $seconds): Inertia\Response   // explicit value, overrides expire
Inertia\Response::staleIfError(?int $seconds): Inertia\Response

They take the same values as the route options of the same name. Each value comes from the response method, else the route option, else config('inertia-static.defaults').

Good to know

• They only apply to isr and static routes; on dynamic routes they are ignored.
• They apply to both URLs of the page (HTML and page JSON).
• Browsers always get Cache-Control: public, max-age=0, must-revalidate: only the CDN keeps the page for revalidate seconds.
• The exact headers depend on the CDN: see Headers.