This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The IntersectionObserverEntry interface's read-only target property indicates which targeted Element has changed its amount of intersection with the intersection root.
Syntax
var target = IntersectionObserverEntry.target;
Value
The IntersectionObserverEntry's target property specifies which Element previously targeted by calling IntersectionObserver.observe() experienced a change in intersection with the root.
Example
In this simple example, each targeted element's opacity is set to its intersectionRatio.
function intersectionCallback(entries) {
entries.forEach(function(entry) {
entry.target.opacity = entry.intersectionRatio;
});
}
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 Observer The definition of 'IntersectionObserverEntry.target' 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.
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 51 | 15 | 55 53 — 551 | No | ? | ? |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | 51 | 51 | Yes | ? | ? | ? | 5.0 |
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.