Web/API/IntersectionObserverEntry/isIntersecting
The IntersectionObserverEntry
interface's read-only isIntersecting
property is a Boolean value which is true
if the target element intersects with the intersection observer's root. If this is true
, then, the IntersectionObserverEntry
describes a transition into a state of intersection; if it's false
, then you know the transition is from intersecting to not-intersecting.
Syntax
var isIntersecting = IntersectionObserverEntry.isIntersecting;
Value
A Boolean value which indicates whether the target
element has transitioned into a state of intersection (true
) or out of a state of intersection (false
).
Example
In this simple example, an intersection callback is used to update a counter of how many targeted elements are currently intersecting with the intersection root.
function intersectionCallback(entries) {
entries.forEach(function(entry) {
if (entry.isIntersecting) {
intersectingCount += 1;
} else {
intersectingCount -= 1;
}
});
}
To see a more concrete example, take a look at Handling intersection changes in Timing element visibility with the Intersection Observer API.
Specifications
Specification | Status | Comment |
Intersection ObserverThe definition of 'IntersectionObserverEntry.isIntersecting' 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.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Chrome
Full support 51 |
Edge
Full support 16 |
Firefox Full support 55 Full support 55 No support 53 — 55 Disabled' From version 53 until version 55 (exclusive): this feature is behind the |
IE
No support No |
Opera
Full support Yes |
Safari
Full support 12.1 |
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.
IntersectionObserverEntry.isIntersecting by Mozilla Contributors is licensed under CC-BY-SA 2.5.