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Draft
This page is not complete.
This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The IntersectionObserver
interface's read-only thresholds
property returns the list of intersection thresholds that was specified when the observer was instantiated with IntersectionObserver()
. If only one threshold ratio was provided when instanitating the object, this will be an array containing that single value.
See Thresholds in Intersection Observer API to learn how thresholds work.
Syntax
var thresholds =
IntersectionObserver.thresholds;
Value
An array of intersection thresholds, originally specified using the threshold
property when instantiating the observer. If only one observer was specified, without being in an array, this value is a one-entry array containing that threshold. Regardless of the order your original threshold
array was in, this one is always sorted in numerically increasing order.
If no threshold
option was included when IntersectionObserver()
was used to instantiate the observer, the value of thresholds
is simply [0]
.
Be careful! Although the options
object you can specify when creating an IntersectionObserver
has a field named threshold
, this property is called thresholds
. Confusing? Yes. If you accidentally use thresholds
as the name of the field in your options
, the thresholds
array will wind up being simply [0.0]
, which is likely not what you expect. Debugging chaos may ensue.
Examples
<<<...>>>
Specifications
Specification | Status | Comment |
---|---|---|
Intersection Observer The definition of 'IntersectionObserver.thresholds' 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 | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic support | Chrome Full support 51 | Edge Full support 15 | Firefox
Full support
55
| IE No support No | Opera ? | Safari ? | WebView Android Full support 51 | Chrome Android Full support 51 | Edge Mobile Full support Yes | 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.