# React Intersection Observer: track elements entering the viewport

Canonical source : [React Intersection Observer: track elements entering the viewport](<https://sebastien.rigaux.be/en/tech-watch/links/react-intersection-observer-track-elements-entering-the-viewport>)

The library exposes Intersection Observer through React hooks and components. It reuses compatible observers and provides mocks for testing lazy loading and scroll animations.

- Selected on : 2025-11-06

- Entry updated : 2026-11-07T20:32:37+0000

- Format : Repository

- Source language : EN

Original resource : [React Intersection Observer: track elements entering the viewport](<https://github.com/thebuilder/react-intersection-observer>)

Tags : [React](<https://sebastien.rigaux.be/en/tech-watch/tags/react>) · [Web Performance](<https://sebastien.rigaux.be/en/tech-watch/tags/web-performance>) · [Animation](<https://sebastien.rigaux.be/en/tech-watch/tags/animation>)

Available versions : [Français](<https://sebastien.rigaux.be/veille/liens/react-intersection-observer-suivre-l-entree-d-elements-dans-le-viewport>) · [English](<https://sebastien.rigaux.be/en/tech-watch/links/react-intersection-observer-track-elements-entering-the-viewport>)

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