# Threejs + Intersection Observer

> Almost done with this new experience. Source code is already available on my GitHub profile. Here is a tutorial on how I used javaScript Intersection…

Canonical page: https://andersonmancini.dev/videos/threejs-intersection-observer

Published: 2022-05-18 · Duration: 1:09 · Category: Tutorials · Tags: three.js, tutorial, source-code, threejs-tutorial, intersection-observer, creative-coding, webgl

Watch: [YouTube](https://www.youtube.com/watch?v=QHznDtzwmqM) · [Subscribe to the channel](https://www.youtube.com/@AndersonMancini?sub_confirmation=1)

Almost done with this new experience. Source code is already available on my GitHub profile. Here is a tutorial on how I used javaScript Intersection Observer to avoid both sections rendering at the same time and squeeze more performance. 60 FPS, even with 2 renderers on the page.