This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The IntersectionObserverEntry
interface's read-only intersectionRect
property is a DOMRectReadOnly
object which describes the smallest rectangle that contains the entire portion of the target element which is currently visible within the intersection root.
Syntax
var intersectionRect =
IntersectionObserverEntry.intersectionRect;
Value
A DOMRectReadOnly
which describes the part of the target element that's currently visible within the root's intersection rectangle.
This rectangle is computed by taking the intersection of boundingClientRect
with each of the target
's ancestors' clip rectangles, with the exception of the intersection root
itself.
Example
In this simple example, an intersection callback stores the intersection rectangle for later use by the code that draws the target elements' contents, so that only the visible area is redrawn.
function intersectionCallback(entries) { entries.forEach(function(entry) { refreshZones.push({ element: entry.target, rect: entry.intersectionRect }); }); }
Specifications
Specification | Status | Comment |
---|---|---|
Intersection Observer The definition of 'IntersectionObserverEntry.intersectionRect' in that specification. |
Working 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.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
intersectionRect | Chrome Full support 51 | Edge Full support 15 | Firefox
Full support
55
| IE No support No | Opera Full support Yes | Safari ? | WebView Android Full support 51 | Chrome Android Full support 51 | Firefox Android ? | Opera Android ? | Safari iOS ? | Samsung Internet Android Full support 5.0 |
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.
- User must explicitly enable this feature.
- User must explicitly enable this feature.