only and except ride as X-Keel-Only / X-Keel-Except. They apply
only on visits — a document GET is the SEO unit and always returns the
full seed. The host filters top-level keys of data and sets
X-Keel-Partial to the comma-separated list it kept.
The client shallow-merges that data object over peekPage()?.data before
setPage. Combined with preserveState, the adapter calls update(ctx) on
the same module instead of unmounting.
router.reload({ only: ["feed"], preserveState: true })
router.visit("/u/ada", { except: ["sidebar"], preserveState: true })Partial responses are never read from or written to the prefetch cache. A partial must not satisfy a later full visit.
Use this for flash-message strips, comment lists, and validation 422s where
scrolling away from the field would be hostile. Hover prefetch on Link
still warms a full seed plus the entry module.