Intersection Observer API - A Quickstart
Learn how to use the Intersection Observer API with an example. We create a sidebar which adds an active class to the active section header. The active section is determined by using the Intersection Observer API! I explain every aspect of the api so you can modify it for your needs. In this video, we use Next.js but any framework (or no framework) will work. You will just have to modify the code a little.
Docs: https://developer.mozilla.org/en-US/d...
0:00 Demo
0:13 Intersection Observer API Explanation
0:51 Starter Code Overview
2:45 Intersection Observer API Options
4:30 Intersection Observer API Targets
5:25 Intersection Observer API
7:27 Viewing Console
8:33 Active Header
9:16 Testing
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