IntersectionObserver class

The interface of the Intersection Observer API provides a way to asynchronously observe changes in the intersection of a target element with an ancestor element or with a top-level document's viewport. The ancestor element or viewport is referred to as the root. When an is created, it's configured to watch for given ratios of visibility within the root. The configuration cannot be changed once the is created, so a given observer object is only useful for watching for specific changes in degree of visibility; however, you can watch multiple target elements with the same observer.

Available extensions
Annotations
  • @JS()
  • @staticInterop

Properties

hashCode → int
The hash code for this object.
no setterinherited
root → dynamic

Available on IntersectionObserver, provided by the PropsIntersectionObserver extension

no setter
rootMargin → String

Available on IntersectionObserver, provided by the PropsIntersectionObserver extension

no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
thresholds → Iterable<double>

Available on IntersectionObserver, provided by the PropsIntersectionObserver extension

no setter

Methods

disconnect() → void

Available on IntersectionObserver, provided by the PropsIntersectionObserver extension

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
observe(Element target) → void

Available on IntersectionObserver, provided by the PropsIntersectionObserver extension

takeRecords() → Iterable<IntersectionObserverEntry>

Available on IntersectionObserver, provided by the PropsIntersectionObserver extension

toString() → String
A string representation of this object.
inherited
unobserve(Element target) → void

Available on IntersectionObserver, provided by the PropsIntersectionObserver extension

Operators

operator ==(Object other) → bool
The equality operator.
inherited