Router cache on client in NextJS - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of router cache on the client in Next.js?

Router cache on the client stores previously visited pages to speed up navigation by avoiding full page reloads.

beginner

How does Next.js use router cache to improve user experience?

Next.js prefetches linked pages and caches them on the client, so when users click links, pages load instantly without waiting for the server.

intermediate

Which Next.js hook or method helps in prefetching pages for router cache?

The next/link component automatically prefetches pages in the background when visible, enabling router cache.

beginner

What happens if router cache is disabled or not used in Next.js?

Without router cache, each navigation fetches fresh data from the server instead of using the cache, causing slower transitions and a less smooth user experience.

intermediate

Can router cache cause stale data issues? How to handle it in Next.js?

Yes, cached pages might show old data. Use client-side data fetching hooks like useSWR or useEffect to refresh data after navigation.

What does Next.js router cache store on the client?

A Database queries

B Server logs

C User cookies

D Previously visited pages

Router cache stores pages visited before to speed up navigation.

Which Next.js component automatically prefetches pages for router cache?

A <code>next/link</code>

B <code>next/image</code>

C <code>next/script</code>

D <code>next/head</code>

next/link prefetches linked pages to cache them.

What is a benefit of router cache on client in Next.js?

A Faster page transitions

B More server load

C Slower navigation

D Increased page size

Router cache speeds up navigation by loading pages instantly.

How can you avoid stale data when using router cache in Next.js?

A Disable JavaScript

B Clear browser cookies

C Use client-side data fetching hooks like <code>useSWR</code>

D Use server-side rendering only

Client-side hooks refresh data after navigation to keep it fresh.

What happens if router cache is not used in Next.js navigation?

A Pages load instantly

B Fetches fresh data from the server on every navigation

C Prefetching increases

D Navigation is disabled

Without cache, every navigation fetches from the server instead of using the cache, causing slower transitions.

Explain how Next.js router cache works and why it improves navigation speed.

Think about how visiting a page once helps next visits load faster.

Describe how to handle data freshness when using router cache in Next.js.

Consider how to update data after loading a cached page.