Preload Review Data as Users Scroll

The ideal review section loads before the shopper reaches it, creating the perception of zero load time. If a shopper scrolls down and sees a loading spinner where reviews should be, that moment of emptiness erodes trust — it looks like there might not be any reviews at all, even if they load a second later.

Preloading review data works by monitoring scroll position and triggering a data fetch when the user is 500-1000px above the review section. By the time they scroll to the reviews, the content is already rendered and waiting. This technique combines the performance benefit of lazy loading (no initial page weight) with the UX benefit of eager loading (instant visibility).

The implementation uses Intersection Observer with a rootMargin that extends the detection zone above the visible viewport. When the review section's container enters this extended zone, fetch the review data and begin rendering.

Eevy AI uses this exact approach — review sections are loaded server-side with edge caching, so review data is available in under 200ms from Cloudflare's edge network. Combined with scroll-aware preloading, shoppers never see a loading state for reviews.