About Intersection Observer
Intersection Observer is a browser API that provides a way to observe the visibility and position of a DOM element relative to the containing root element or viewport.
How many people use Intersection Observer
GitHub · npm- #12
Autoptimize288 - #13
Flying Pages215 - #14
Sections.design Shopify App Optimization215 - #15
Blitz156 - #16Intersection Observer81
- #17
a3 Lazy Load20 - #18
ShortPixel Image Optimizer18
17M npm downloads, last 30 days
#16 of 18 Performance we have counts for (of 52) · bars are GitHub stars across these neighbours; the category leader is LazySizes at 18k · as of August 30, 2026
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Intersection Observer#16 of 18 Performance
Blitz#15 of 18 Performance
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How we audit Intersection Observer
We measure the detected version against Intersection Observer's release history and grade the surrounding stack with a Lighthouse-grade quality audit. Weak or outdated links weigh more - one risky dependency can pull the whole score down.
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