Add facade for Intersection Observer API

Author: lindholc

api-reports/2_12.txt

@@ -15531,6 +15531,30 @@ InputType[SO] val insertReplacementText: InputType
 InputType[SO] val insertText: InputType
 InputType[SO] val insertTranspose: InputType
 InputType[SO] val insertUnorderedList: InputType
+IntersectionObserver[JC] def disconnect(): Unit
+IntersectionObserver[JC] def observe(target: Element): Unit
+IntersectionObserver[JC] def root: Document | Element
+IntersectionObserver[JC] def rootMargin: String
+IntersectionObserver[JC] def takeRecords(): js.Array[IntersectionObserverEntry]
+IntersectionObserver[JC] def thresholds: js.Array[Double]
+IntersectionObserver[JC] def unobserve(target: Element): Unit
+IntersectionObserverEntry[JC] def boundingClientRect: DOMRectReadOnly
+IntersectionObserverEntry[JC] def intersectionRatio: Double
+IntersectionObserverEntry[JC] def intersectionRect: DOMRectReadOnly
+IntersectionObserverEntry[JC] def isIntersecting: Boolean
+IntersectionObserverEntry[JC] def rootBounds: DOMRectReadOnly
+IntersectionObserverEntry[JC] def target: Element
+IntersectionObserverEntry[JC] def time: Double
+IntersectionObserverEntryInit[JT] var boundingClientRect: DOMRect
+IntersectionObserverEntryInit[JT] var intersectionRatio: Double
+IntersectionObserverEntryInit[JT] var intersectionRect: DOMRect
+IntersectionObserverEntryInit[JT] var isIntersecting: Boolean
+IntersectionObserverEntryInit[JT] var rootBounds: DOMRect
+IntersectionObserverEntryInit[JT] var target: Element
+IntersectionObserverEntryInit[JT] var time: Double
+IntersectionObserverInit[JT] var root: js.UndefOr[Document | Element]
+IntersectionObserverInit[JT] var rootMargin: js.UndefOr[String]
+IntersectionObserverInit[JT] var threshold: js.UndefOr[Double | js.Array[Double]]
 JsonWebKey[JT] var alg: js.Array[String]
 JsonWebKey[JT] var crv: String
 JsonWebKey[JT] var d: String

api-reports/2_13.txt

@@ -15531,6 +15531,30 @@ InputType[SO] val insertReplacementText: InputType
 InputType[SO] val insertText: InputType
 InputType[SO] val insertTranspose: InputType
 InputType[SO] val insertUnorderedList: InputType
+IntersectionObserver[JC] def disconnect(): Unit
+IntersectionObserver[JC] def observe(target: Element): Unit
+IntersectionObserver[JC] def root: Document | Element
+IntersectionObserver[JC] def rootMargin: String
+IntersectionObserver[JC] def takeRecords(): js.Array[IntersectionObserverEntry]
+IntersectionObserver[JC] def thresholds: js.Array[Double]
+IntersectionObserver[JC] def unobserve(target: Element): Unit
+IntersectionObserverEntry[JC] def boundingClientRect: DOMRectReadOnly
+IntersectionObserverEntry[JC] def intersectionRatio: Double
+IntersectionObserverEntry[JC] def intersectionRect: DOMRectReadOnly
+IntersectionObserverEntry[JC] def isIntersecting: Boolean
+IntersectionObserverEntry[JC] def rootBounds: DOMRectReadOnly
+IntersectionObserverEntry[JC] def target: Element
+IntersectionObserverEntry[JC] def time: Double
+IntersectionObserverEntryInit[JT] var boundingClientRect: DOMRect
+IntersectionObserverEntryInit[JT] var intersectionRatio: Double
+IntersectionObserverEntryInit[JT] var intersectionRect: DOMRect
+IntersectionObserverEntryInit[JT] var isIntersecting: Boolean
+IntersectionObserverEntryInit[JT] var rootBounds: DOMRect
+IntersectionObserverEntryInit[JT] var target: Element
+IntersectionObserverEntryInit[JT] var time: Double
+IntersectionObserverInit[JT] var root: js.UndefOr[Document | Element]
+IntersectionObserverInit[JT] var rootMargin: js.UndefOr[String]
+IntersectionObserverInit[JT] var threshold: js.UndefOr[Double | js.Array[Double]]
 JsonWebKey[JT] var alg: js.Array[String]
 JsonWebKey[JT] var crv: String
 JsonWebKey[JT] var d: String

dom/src/main/scala/org/scalajs/dom/IntersectionObserver.scala

@@ -0,0 +1,46 @@
+package org.scalajs.dom
+
+import scala.scalajs.js
+import scala.scalajs.js.annotation.JSGlobal
+import scala.scalajs.js.|
+
+/** 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.
+  */
+@js.native
+@JSGlobal
+class IntersectionObserver(
+    callback: js.Function2[js.Array[IntersectionObserverEntry], IntersectionObserver, Unit],
+    init: IntersectionObserverInit
+) extends js.Object {
+
+  /** 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.
+    */
+  def root: Document | Element = js.native
+
+  /** 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".
+    */
+  def rootMargin: String = js.native
+
+  /** 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.
+    */
+  def thresholds: js.Array[Double] = js.native
+
+  /** Stops the IntersectionObserver object from observing any target. */
+  def disconnect(): Unit = js.native
+
+  /** Tells the IntersectionObserver a target element to observe. */
+  def observe(target: Element): Unit = js.native
+
+  /** Returns an array of IntersectionObserverEntry objects for all observed targets. */
+  def takeRecords(): js.Array[IntersectionObserverEntry] = js.native
+
+  /** Tells the IntersectionObserver to stop observing a particular target element. */
+  def unobserve(target: Element): Unit = js.native
+}

dom/src/main/scala/org/scalajs/dom/IntersectionObserverEntry.scala

@@ -0,0 +1,38 @@
+package org.scalajs.dom
+
+import scala.scalajs.js
+import scala.scalajs.js.annotation.JSGlobal
+
+/** The IntersectionObserverEntry interface of the Intersection Observer API describes the intersection between the
+  * target element and its root container at a specific moment of transition.
+  */
+@js.native
+@JSGlobal
+class IntersectionObserverEntry(init: IntersectionObserverEntryInit) extends js.Object {
+
+  /** The bounds rectangle of the target element as a DOMRectReadOnly. */
+  def boundingClientRect: DOMRectReadOnly = js.native
+
+  /** The ratio of the intersectionRect to the boundingClientRect. */
+  def intersectionRatio: Double = js.native
+
+  /** A DOMRectReadOnly representing the target's visible area. */
+  def intersectionRect: DOMRectReadOnly = js.native
+
+  /** 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.
+    */
+  def isIntersecting: Boolean = js.native
+
+  /** A DOMRectReadOnly for the intersection observer's root. */
+  def rootBounds: DOMRectReadOnly = js.native
+
+  /** The Element whose intersection with the root changed. */
+  def target: Element = js.native
+
+  /** A DOMHighResTimeStamp indicating the time at which the intersection was recorded, relative to the
+    * IntersectionObserver's time origin.
+    */
+  def time: Double = js.native
+}

dom/src/main/scala/org/scalajs/dom/IntersectionObserverEntryInit.scala

@@ -0,0 +1,20 @@
+package org.scalajs.dom
+
+import scala.scalajs.js
+
+trait IntersectionObserverEntryInit extends js.Object {
+
+  var boundingClientRect: DOMRect
+
+  var intersectionRatio: Double
+
+  var intersectionRect: DOMRect
+
+  var isIntersecting: Boolean
+
+  var rootBounds: DOMRect
+
+  var target: Element
+
+  var time: Double
+}

dom/src/main/scala/org/scalajs/dom/IntersectionObserverInit.scala

@@ -0,0 +1,27 @@
+package org.scalajs.dom
+
+import scala.scalajs.js
+import scala.scalajs.js.|
+
+/** An object which customizes the observer. */
+trait IntersectionObserverInit extends js.Object {
+
+  /** An Element or Document object which is an ancestor of the intended target, whose bounding rectangle will be
+    * considered the viewport. Any part of the target not visible in the visible area of the root is not considered
+    * visible.
+    */
+  var root: js.UndefOr[Document | Element] = js.undefined
+
+  /** A string which specifies a set of offsets to add to the root's bounding_box when calculating intersections,
+    * effectively shrinking or growing the root for calculation purposes. The syntax is approximately the same as that
+    * for the CSS margin property; see The intersection root and root margin for more information on how the margin
+    * works and the syntax. The default is "0px 0px 0px 0px".
+    */
+  var rootMargin: js.UndefOr[String] = js.undefined
+
+  /** Either a single number or an array of numbers between 0.0 and 1.0, specifying a ratio of intersection area to
+    * total bounding box area for the observed target. A value of 0.0 means that even a single visible pixel counts as
+    * the target being visible. 1.0 means that the entire target element is visible. The default is a threshold of 0.0.
+    */
+  var threshold: js.UndefOr[Double | js.Array[Double]] = js.undefined
+}