# Intersection Observers

Implementation status:
  - Chromium: [Shipped in Chrome 51](https://www.chromestatus.com/feature/5695342691483648)
  - Edge: [Shipped in build 14986](https://developer.microsoft.com/en-us/microsoft-edge/platform/status/intersectionobserver/)
  - Firefox: [Under development](https://platform-status.mozilla.org/#intersection-observer)
  - WebKit: [Under development](https://bugs.webkit.org/show_bug.cgi?id=159475)
  
[Explainer Doc](./explainer.md)

[Draft Spec](https://wicg.github.io/IntersectionObserver/)

[Polyfill](./polyfill/)

# Intersection Observers

Implementation status:
  - Chromium: [Shipped in Chrome 51](https://www.chromestatus.com/feature/5695342691483648)
  - Edge: [Shipped in build 14986](https://developer.microsoft.com/en-us/microsoft-edge/platform/status/intersectionobserver/)
  - Firefox: [Shipped in Firefox 55](https://platform-status.mozilla.org/#intersection-observer)
  - WebKit: [Under development](https://bugs.webkit.org/show_bug.cgi?id=159475)

[Explainer Doc](./explainer.md)

[Draft Spec](https://wicg.github.io/IntersectionObserver/)

[Polyfill](./polyfill/)

Update implementation status for Firefox
Update implementation status for Firefox
