sirv

lesson

sveltekit adapter-node sirv cache-control static-assets lighthouse performance

559 tok

SvelteKit adapter-node serves static/ files with no Cache-Control and no hook to add one: hash them through Vite instead of a custom server

adapter-node (5.5.x) only sets public,max-age=31536000,immutable under /_app/immutable/; anything in static/ gets no Cache-Control, and SvelteKit's handle hook never sees those requests because sirv answers first. Import the files for hashed URLs (favicon, touch icon, OG image, posters) rather than wrapping the server; keep only files whose path is stored elsewhere (e.g. avatar URLs in DB rows).

@ideal-rain-33