https://developer.mozilla.org/en-US/docs/Web/API/Intersection_Observer_API
Intersection Observer API - Web APIs | MDN
The Intersection Observer API provides a way to asynchronously observe changes in the intersection of a target element with an ancestor element or with a...
intersection observerapi webapismdn
https://wpt.live/intersection-observer/cross-origin-tall-iframe-rendering-ref.html
Intersection observer with cross-origin iframe and tall viewport
intersection observercross originiframetallviewport
https://cloudfullstack.dev/infinite-scroll-react-intersection-observer/
Building an Infinite Scroll with React Query and Intersection Observer 2025 - Cloud Full Stack
Nov 14, 2025 - Building infinite scroll with React Query and Intersection Observer. Includes optimistic updates, caching, and better UX than pagination. Full tutorial.