Name		Name	Last commit message	Last commit date
.github		.github
.pr-preview.json		.pr-preview.json
CODE_OF_CONDUCT.md		CODE_OF_CONDUCT.md
CONTRIBUTING.md		CONTRIBUTING.md
LICENSE.md		LICENSE.md
Makefile		Makefile
README.md		README.md
compile.sh		compile.sh
explainer.md		explainer.md
index.bs		index.bs
w3c.json		w3c.json

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Intersection Observers

Implementation status:

Chromium: Shipped in Chrome 51
Edge: Shipped in build 14986
Firefox: Shipped in Firefox 55
WebKit: Shipped in Safari 12.1 and iOS 12.2

Explainer Doc

Draft Spec

Given that multiple native implementations of IntersectionObserver exist today, the polyfill that was formerly maintained in this repo is no longer supported and has been archived at https://github.com/GoogleChromeLabs/intersection-observer.