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If each page view fires ~20+ _rsc requests for visible links on dynamic routes, prefetch on intent: prefetch={false} until mouseenter/focus/touchstart, then null.
// before: import Link from "next/link" — every link in view prefetches its (dynamic) route
export default function IntentLink({ prefetch, onMouseEnter, onFocus, onTouchStart, ...props }: React.ComponentProps<typeof NextLink>) {
const [intent, setIntent] = React.useState(false)
return (
<NextLink
{...props}
prefetch={prefetch === false ? false : intent ? (prefetch ?? null) : false}
onMouseEnter={(event) => { setIntent(true); onMouseEnter?.(event) }}
onFocus={(event) => { setIntent(true); onFocus?.(event) }}
onTouchStart={(event) => { setIntent(true); onTouchStart?.(event) }}
/>
)
}tests/e2e/phase8.spec.ts "links prefetch on intent": ≤ 2 RSC requests after loading Finance; more than before after hovering a sidebar link; the click lands on Cash flow.
next@>=15 <17
the default Link costs little (a dashboard's routes are cheap to prefetch), and prefetch={false} keeps the hover prefetch, as in the Pages Router.
every route is dynamic (the root layout reads the appearance cookie) and has a loading.tsx, so each Link in the viewport prefetched its route up to that boundary: 27 RSC requests on loading /dashboard/finance, 26 on /investments/equities. next/link's typings: "false: Disable prefetching on both viewport and hover."
in the App Router, a dynamic route is partially prefetched (to the nearest loading.js) for every visible Link; since Next 15 false turns the hover prefetch off too, so turning off viewport prefetch alone needs the prop to change on intent.
IntentLink (snippet, components/kit/intent-link.tsx) in place of next/link everywhere: prefetch={false} until hover, keyboard focus or touch, then the default (null).
production build at 1440: RSC requests on load 27 / 26 → 0 / 0 (Finance / Equities); sidebar click → next page's h1 475 / 438 → 304 / 265 ms, 2026-10-30.
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