This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
The IntersectionObserverEntry interface of the Intersection Observer API provides information about the intersection of a particular target with the observers root element at a particular time. Instances of this interface cannot be created, but a list of them is returned by IntersectionObserver.takeRecords().
IntersectionObserverEntry.boundingClientRect Read only
DOMRectReadOnly for the intersection observer's target.IntersectionObserverEntry.intersectionRatio Read only
intersectionRect to the boundingClientRect.IntersectionObserverEntry.intersectionRect Read only
DOMRectReadOnly for the visible portion of the intersection observer's target.IntersectionObserverEntry.rootBounds Read only
DOMRectReadOnly for the intersection observer's root.IntersectionObserverEntry.time Read only
DOMHightResTimeStamp indicating when the intersection occurred.| Specification | Status | Comment |
|---|---|---|
| Intersection Observer The definition of 'IntersectionObserverEntry' in that specification. | Editor's Draft | Initial definition |
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|---|
| Basic support | 51.0 | No support[1] | No support[2] | No support | ? | ? |
| Feature | Android | Android Webview | Edge | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|---|---|
| Basic support | No support | 51.0 | No support[1] | No support[2] | No support | No support | ? | ? | 51.0 |
[1] This feature is available since the Windows Insider Preview Build 14986.
[2] This feature is implemented since Gecko 53.0 (Firefox 53.0 / Thunderbird 53.0 / SeaMonkey 2.50) behind the preference dom.IntersectionObserver.enabled, defaulting to false. See bug 1243846.
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https://developer.mozilla.org/en-US/docs/Web/API/IntersectionObserverEntry