IntersectionObserver
The IntersectionObserver 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.
Value members
Concrete methods
Stops the IntersectionObserver object from observing any target.
Stops the IntersectionObserver object from observing any target.
Tells the IntersectionObserver a target element to observe.
Tells the IntersectionObserver a target element to observe.
The Element or Document whose bounds are used as the bounding box when testing for intersection. If no root value was passed to the constructor or its value is null, the top-level document's viewport is used.
The Element or Document whose bounds are used as the bounding box when testing for intersection. If no root value was passed to the constructor or its value is null, the top-level document's viewport is used.
An offset rectangle applied to the root's bounding box when calculating intersections, effectively shrinking or growing the root for calculation purposes. The value returned by this property may not be the same as the one specified when calling the constructor as it may be changed to match internal requirements. Each offset can be expressed in pixels (px) or as a percentage (%). The default is "0px 0px 0px 0px".
An offset rectangle applied to the root's bounding box when calculating intersections, effectively shrinking or growing the root for calculation purposes. The value returned by this property may not be the same as the one specified when calling the constructor as it may be changed to match internal requirements. Each offset can be expressed in pixels (px) or as a percentage (%). The default is "0px 0px 0px 0px".
Returns an array of IntersectionObserverEntry objects for all observed targets.
Returns an array of IntersectionObserverEntry objects for all observed targets.
A list of thresholds, sorted in increasing numeric order, where each threshold is a ratio of intersection area to bounding box area of an observed target. Notifications for a target are generated when any of the thresholds are crossed for that target. If no value was passed to the constructor, 0 is used.
A list of thresholds, sorted in increasing numeric order, where each threshold is a ratio of intersection area to bounding box area of an observed target. Notifications for a target are generated when any of the thresholds are crossed for that target. If no value was passed to the constructor, 0 is used.