IntersectionObserverEntry: rootBounds property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2019.

The IntersectionObserverEntry interface's read-only rootBounds property is a DOMRectReadOnly corresponding to the target's root intersection rectangle, offset by the IntersectionObserver.rootMargin if one is specified.

Value

A DOMRectReadOnly which describes the root intersection rectangle. For roots which are the Document's viewport, this rectangle is the bounds rectangle of the entire document. Otherwise, it's the bounds of the root element.

This rectangle is offset by the values in IntersectionObserver.rootMargin.

Specifications

Specification
Intersection Observer
# dom-intersectionobserverentry-rootbounds

Browser compatibility

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