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'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.
Syntax
var rootBounds = IntersectionObserverEntry.rootBounds;
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 | Status | Comment |
|---|---|---|
| Intersection Observer The definition of 'IntersectionObserverEntry.rootBounds' in that specification. |
Editor's Draft | Initial definition |
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
| Feature | Chrome | Firefox | Edge | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic Support | 51 | 53 — 551 55 | 15 | (No) | ? | ? |
| Feature | Android | Chrome for Android | Edge mobile | Firefox for Android | IE mobile | Opera Android | iOS Safari |
|---|---|---|---|---|---|---|---|
| Basic Support | 51 | 51 | (Yes) | ? | (No) | ? | ? |
1. From version 53 until version 55 (exclusive): this feature is behind the dom.IntersectionObserver.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.