diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 402a90131..431be556d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
         scalaversion: ["2.11.12", "2.12.15", "2.13.6", "3.1.3"]
     steps:
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Scala
         uses: japgolly/setup-everything-scala@v3.1
@@ -34,7 +34,7 @@ jobs:
   readme:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: japgolly/setup-everything-scala@v3.1
       - name: Readme generation
         run: sbt readme/run
diff --git a/.github/workflows/ghpages.yml b/.github/workflows/ghpages.yml
index b0dc80832..07fbed981 100644
--- a/.github/workflows/ghpages.yml
+++ b/.github/workflows/ghpages.yml
@@ -10,7 +10,7 @@ jobs:
   build-and-deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup Scala
         uses: japgolly/setup-everything-scala@v3.1
@@ -19,7 +19,7 @@ jobs:
         run: sbt readme/run
 
       - name: Deploy
-        uses: JamesIves/github-pages-deploy-action@v4.4.1
+        uses: JamesIves/github-pages-deploy-action@v4.4.3
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           branch: gh-pages
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 3717059d9..4a6da22ec 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
diff --git a/.scalafmt.conf b/.scalafmt.conf
index 8f8fcffb5..05fae5991 100644
--- a/.scalafmt.conf
+++ b/.scalafmt.conf
@@ -1,4 +1,4 @@
-version = 3.7.3
+version = 3.7.4
 runner.dialect = scala213source3
 project.git = true
 style = Scala.js
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index f1437a618..18737f53b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -54,6 +54,13 @@ Please:
 * Use `def` for read-only properties unless there is a compelling reason it should be a `val`
   (i.e., the spec definitively states it is constant)
 * Use `Double` for integer-values that can fall outside the range of `Int`
+* Prefer adding overloads instead of using union `|` types for method and constructor parameters. For example:
+```diff
+-  def createElement(tagName: String, options: String | ElementCreationOptions = js.native): Element = js.native
++  def createElement(tagName: String): Element = js.native
++  def createElement(tagName: String, options: String): Element = js.native
++  def createElement(tagName: String, options: ElementCreationOptions): Element = js.native
+```
 * Add scaladocs via copy-paste from MDN
 
 
diff --git a/api-reports/2_12.txt b/api-reports/2_12.txt
index 0d273a2be..b9f9637ca 100644
--- a/api-reports/2_12.txt
+++ b/api-reports/2_12.txt
@@ -1348,6 +1348,12 @@ CompositionEventInit[JT] var detail: js.UndefOr[Int]
 CompositionEventInit[JT] var locale: js.UndefOr[String]
 CompositionEventInit[JT] var scoped: js.UndefOr[Boolean]
 CompositionEventInit[JT] var view: js.UndefOr[Window]
+CompressionFormat[JT]
+CompressionFormat[SO] val deflate: CompressionFormat
+CompressionFormat[SO] val `deflate-raw`: CompressionFormat
+CompressionFormat[SO] val gzip: CompressionFormat
+CompressionStream[JC] def readable: ReadableStream[Uint8Array]
+CompressionStream[JC] def writable: WriteableStream[Uint8Array]
 ConcatParams[JT] val algorithmId: BufferSource
 ConcatParams[JT] val hash: HashAlgorithmIdentifier
 ConcatParams[JT] val name: String
@@ -1496,6 +1502,10 @@ DOMRect[JC] def x: Double
 DOMRect[JC] def x_ = (x: Double): Unit
 DOMRect[JC] def y: Double
 DOMRect[JC] def y_ = (y: Double): Unit
+DOMRectInit[JT] var height: js.UndefOr[Double]
+DOMRectInit[JT] var width: js.UndefOr[Double]
+DOMRectInit[JT] var x: js.UndefOr[Double]
+DOMRectInit[JT] var y: js.UndefOr[Double]
 DOMRectList[JC] @JSBracketAccess def apply(index: Int): T
 DOMRectList[JC] def length: Int
 DOMRectReadOnly[JT] def bottom: Double
@@ -1561,6 +1571,8 @@ DataTransferItemList[JC] @js.annotation.JSBracketAccess def apply(index: Int): D
 DataTransferItemList[JC] def clear(): Unit
 DataTransferItemList[JC] def length: Int
 DataTransferItemList[JC] def remove(index: Int): Unit
+DecompressionStream[JC] def readable: ReadableStream[Uint8Array]
+DecompressionStream[JC] def writable: WriteableStream[Uint8Array]
 DedicatedWorkerGlobalScope[JO] def self: DedicatedWorkerGlobalScope
 DedicatedWorkerGlobalScope[JT] def addEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], options: EventListenerOptions): Unit
 DedicatedWorkerGlobalScope[JT] def addEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], useCapture: Boolean?): Unit
@@ -1725,7 +1737,11 @@ Document[JC] def createCDATASection(data: String): CDATASection
 Document[JC] def createComment(data: String): Comment
 Document[JC] def createDocumentFragment(): DocumentFragment
 Document[JC] def createElement(tagName: String): Element
+Document[JC] def createElement(tagName: String, options: ElementCreationOptions): Element
+Document[JC] def createElement(tagName: String, options: String): Element
 Document[JC] def createElementNS(namespaceURI: String, qualifiedName: String): Element
+Document[JC] def createElementNS(namespaceURI: String, qualifiedName: String, options: ElementCreationOptions): Element
+Document[JC] def createElementNS(namespaceURI: String, qualifiedName: String, options: String): Element
 Document[JC] def createEvent(eventInterface: String): Event
 Document[JC] def createNSResolver(node: Node): XPathNSResolver
 Document[JC] def createNodeIterator(root: Node, whatToShow: Int, filter: NodeFilter, entityReferenceExpansion: Boolean): NodeIterator
@@ -2065,6 +2081,7 @@ Element[JC] def setAttributeNodeNS(newAttr: Attr): Attr
 Element[JC] def shadowRoot: ShadowRoot
 Element[JC] def tagName: String
 Element[JC] var textContent: String
+ElementCreationOptions[JT] var is: js.UndefOr[String]
 ElementDefinitionOptions[JT] var `extends`: js.UndefOr[String]
 EndOfStreamError[JT]
 EndOfStreamError[SO] val decode: EndOfStreamError
@@ -2286,7 +2303,18 @@ FocusEventInit[JT] var scoped: js.UndefOr[Boolean]
 FocusEventInit[JT] var view: js.UndefOr[Window]
 FocusOptions[JT] var focusVisible: js.UndefOr[Boolean]
 FocusOptions[JT] var preventScroll: js.UndefOr[Boolean]
-FormData[JC] def append(name: js.Any, value: js.Any, blobName: String?): Unit
+FormData[JC] def append(name: String, value: Blob, blobName: String?): Unit
+FormData[JC] def append(name: String, value: String): Unit
+FormData[JC] def delete(name: String): Unit
+FormData[JC] def entries(): js.Iterator[js.Tuple2[String, String | Blob]]
+FormData[JC] def get(name: String): String | Blob
+FormData[JC] def getAll(name: String): js.Array[String | Blob]
+FormData[JC] def has(name: String): Boolean
+FormData[JC] @JSName(js.Symbol.iterator) override def jsIterator(): js.Iterator[js.Tuple2[String, String | Blob]]
+FormData[JC] def keys(): js.Iterator[String]
+FormData[JC] def set(name: String, value: Blob, blobName: String?): Unit
+FormData[JC] def set(name: String, value: String): Unit
+FormData[JC] def values(): js.Iterator[String | Blob]
 FormData[JO]
 FrameType[JT]
 FrameType[SO] val auxiliary: FrameType
@@ -2380,6 +2408,7 @@ HTMLAnchorElement[JC] var contentEditable: String
 HTMLAnchorElement[JC] def dataset: js.Dictionary[String]
 HTMLAnchorElement[JC] var dir: String
 HTMLAnchorElement[JC] def dispatchEvent(evt: Event): Boolean
+HTMLAnchorElement[JC] var download: String
 HTMLAnchorElement[JC] var draggable: Boolean
 HTMLAnchorElement[JC] var filters: Object
 HTMLAnchorElement[JC] def firstChild: Node
@@ -4901,7 +4930,11 @@ HTMLDocument[JC] def createCDATASection(data: String): CDATASection
 HTMLDocument[JC] def createComment(data: String): Comment
 HTMLDocument[JC] def createDocumentFragment(): DocumentFragment
 HTMLDocument[JC] def createElement(tagName: String): Element
+HTMLDocument[JC] def createElement(tagName: String, options: ElementCreationOptions): Element
+HTMLDocument[JC] def createElement(tagName: String, options: String): Element
 HTMLDocument[JC] def createElementNS(namespaceURI: String, qualifiedName: String): Element
+HTMLDocument[JC] def createElementNS(namespaceURI: String, qualifiedName: String, options: ElementCreationOptions): Element
+HTMLDocument[JC] def createElementNS(namespaceURI: String, qualifiedName: String, options: String): Element
 HTMLDocument[JC] def createEvent(eventInterface: String): Event
 HTMLDocument[JC] def createNSResolver(node: Node): XPathNSResolver
 HTMLDocument[JC] def createNodeIterator(root: Node, whatToShow: Int, filter: NodeFilter, entityReferenceExpansion: Boolean): NodeIterator
@@ -15502,6 +15535,30 @@ 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: FrozenArray[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: DOMRectInit
+IntersectionObserverEntryInit[JT] var intersectionRatio: Double
+IntersectionObserverEntryInit[JT] var intersectionRect: DOMRectInit
+IntersectionObserverEntryInit[JT] var isIntersecting: Boolean
+IntersectionObserverEntryInit[JT] var rootBounds: DOMRectInit
+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
@@ -16420,13 +16477,20 @@ Navigator[JC] def mediaDevices: MediaDevices
 Navigator[JC] def onLine: Boolean
 Navigator[JC] val permissions: Permissions
 Navigator[JC] def platform: String
+Navigator[JC] def registerProtocolHandler(scheme: String, url: String): Unit
+Navigator[JC] def registerProtocolHandler(scheme: String, url: URL): Unit
 Navigator[JC] def sendBeacon(url: String, data: BodyInit?): Boolean
 Navigator[JC] val serviceWorker: ServiceWorkerContainer
 Navigator[JC] def storage: StorageManager
+Navigator[JC] def unregisterProtocolHandler(scheme: String, url: String): Unit
+Navigator[JC] def unregisterProtocolHandler(scheme: String, url: URL): Unit
 Navigator[JC] def userAgent: String
 Navigator[JC] def vibrate(duration: Double): Boolean
 Navigator[JC] def vibrate(pattern: js.Array[Double]): Boolean
-NavigatorContentUtils[JT]
+NavigatorContentUtils[JT] def registerProtocolHandler(scheme: String, url: String): Unit
+NavigatorContentUtils[JT] def registerProtocolHandler(scheme: String, url: URL): Unit
+NavigatorContentUtils[JT] def unregisterProtocolHandler(scheme: String, url: String): Unit
+NavigatorContentUtils[JT] def unregisterProtocolHandler(scheme: String, url: URL): Unit
 NavigatorGeolocation[JT] def geolocation: Geolocation
 NavigatorID[JT] def appName: String
 NavigatorID[JT] def appVersion: String
@@ -26181,6 +26245,7 @@ URL[JC] var search: String
 URL[JC] var searchParams: URLSearchParams
 URL[JC] var username: String
 URL[JO] def createObjectURL(blob: Blob): String
+URL[JO] def createObjectURL(src: MediaSource): String
 URL[JO] def revokeObjectURL(url: String): Unit
 URLSearchParams[JC] def append(name: String, value: String): Unit
 URLSearchParams[JC] def delete(name: String): Unit
@@ -27071,6 +27136,97 @@ WriteableStream[JT] val closed: js.Promise[WriteableStream[T]]
 WriteableStream[JT] val ready: js.Promise[WriteableStream[T]]
 WriteableStream[JT] def state: WriteableState
 WriteableStream[JT] def write(chunk: Chunk[T]): js.Promise[Any]
+XMLDocument[JC] def addEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], options: EventListenerOptions): Unit
+XMLDocument[JC] def addEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], useCapture: Boolean?): Unit
+XMLDocument[JC] def adoptNode(source: Node): Node
+XMLDocument[JC] def appendChild(newChild: Node): Node
+XMLDocument[JC] def baseURI: String
+XMLDocument[JC] def characterSet: String
+XMLDocument[JC] def childElementCount: Int
+XMLDocument[JC] def childNodes: NodeList[Node]
+XMLDocument[JC] def children: HTMLCollection[Element]
+XMLDocument[JC] def cloneNode(deep: Boolean?): Node
+XMLDocument[JC] def compareDocumentPosition(other: Node): Int
+XMLDocument[JC] def contains(otherNode: Node): Boolean
+XMLDocument[JC] def createAttribute(name: String): Attr
+XMLDocument[JC] def createAttributeNS(namespaceURI: String, qualifiedName: String): Attr
+XMLDocument[JC] def createCDATASection(data: String): CDATASection
+XMLDocument[JC] def createComment(data: String): Comment
+XMLDocument[JC] def createDocumentFragment(): DocumentFragment
+XMLDocument[JC] def createElement(tagName: String): Element
+XMLDocument[JC] def createElement(tagName: String, options: ElementCreationOptions): Element
+XMLDocument[JC] def createElement(tagName: String, options: String): Element
+XMLDocument[JC] def createElementNS(namespaceURI: String, qualifiedName: String): Element
+XMLDocument[JC] def createElementNS(namespaceURI: String, qualifiedName: String, options: ElementCreationOptions): Element
+XMLDocument[JC] def createElementNS(namespaceURI: String, qualifiedName: String, options: String): Element
+XMLDocument[JC] def createEvent(eventInterface: String): Event
+XMLDocument[JC] def createNSResolver(node: Node): XPathNSResolver
+XMLDocument[JC] def createNodeIterator(root: Node, whatToShow: Int, filter: NodeFilter, entityReferenceExpansion: Boolean): NodeIterator
+XMLDocument[JC] def createProcessingInstruction(target: String, data: String): ProcessingInstruction
+XMLDocument[JC] def createRange(): Range
+XMLDocument[JC] def createStyleSheet(href: String?, index: Int?): CSSStyleSheet
+XMLDocument[JC] def createTextNode(data: String): Text
+XMLDocument[JC] def createTreeWalker(root: Node, whatToShow: Int, filter: NodeFilter, entityReferenceExpansion: Boolean): TreeWalker
+XMLDocument[JC] def dispatchEvent(evt: Event): Boolean
+XMLDocument[JC] def doctype: DocumentType
+XMLDocument[JC] def documentElement: Element
+XMLDocument[JC] def documentURI: String
+XMLDocument[JC] def elementFromPoint(x: Double, y: Double): Element
+XMLDocument[JC] def evaluate(xpathExpression: String, contextNode: Node, namespaceResolver: XPathNSResolver, resultType: Int, result: XPathResult): XPathResult
+XMLDocument[JC] def evaluate(xpathExpression: String, contextNode: Node, namespaceResolver: js.Function1[String, String], resultType: Int, result: XPathResult): XPathResult
+XMLDocument[JC] def exitFullscreen(): js.Promise[Unit]
+XMLDocument[JC] def exitPointerLock(): Unit
+XMLDocument[JC] def firstChild: Node
+XMLDocument[JC] def firstElementChild: Element
+XMLDocument[JC] def fullscreenElement: Element
+XMLDocument[JC] def fullscreenEnabled: Boolean
+XMLDocument[JC] def getElementById(elementId: String): Element
+XMLDocument[JC] def getElementsByClassName(classNames: String): HTMLCollection[Element]
+XMLDocument[JC] def getElementsByName(elementName: String): NodeList[Node]
+XMLDocument[JC] def getElementsByTagName(name: String): HTMLCollection[Element]
+XMLDocument[JC] def getElementsByTagNameNS(namespaceURI: String, localName: String): HTMLCollection[Element]
+XMLDocument[JC] def hasChildNodes(): Boolean
+XMLDocument[JC] def hidden: Boolean
+XMLDocument[JC] def implementation: DOMImplementation
+XMLDocument[JC] def importNode(importedNode: Node, deep: Boolean): Node
+XMLDocument[JC] var innerText: String
+XMLDocument[JC] def insertBefore(newChild: Node, refChild: Node): Node
+XMLDocument[JC] def isConnected: Boolean
+XMLDocument[JC] def isDefaultNamespace(namespaceURI: String): Boolean
+XMLDocument[JC] def isEqualNode(arg: Node): Boolean
+XMLDocument[JC] def isSameNode(other: Node): Boolean
+XMLDocument[JC] def isSupported(feature: String, version: String): Boolean
+XMLDocument[JC] def lastChild: Node
+XMLDocument[JC] def lastElementChild: Element
+XMLDocument[JC] def lastModified: String
+XMLDocument[JC] def localName: String
+XMLDocument[JC] def lookupNamespaceURI(prefix: String): String
+XMLDocument[JC] def lookupPrefix(namespaceURI: String): String
+XMLDocument[JC] def namespaceURI: String
+XMLDocument[JC] def nextSibling: Node
+XMLDocument[JC] def nodeName: String
+XMLDocument[JC] def nodeType: Int
+XMLDocument[JC] var nodeValue: String
+XMLDocument[JC] def normalize(): Unit
+XMLDocument[JC] var onfullscreenchange: js.Function1[Event, _]
+XMLDocument[JC] var onfullscreenerror: js.Function1[Event, _]
+XMLDocument[JC] var onpointerlockchange: js.Function1[Event, _]
+XMLDocument[JC] var onpointerlockerror: js.Function1[Event, _]
+XMLDocument[JC] def ownerDocument: Document
+XMLDocument[JC] def parentNode: Node
+XMLDocument[JC] def pointerLockElement: Element
+XMLDocument[JC] def previousSibling: Node
+XMLDocument[JC] def querySelector(selectors: String): Element
+XMLDocument[JC] def querySelectorAll(selectors: String): NodeList[Element]
+XMLDocument[JC] def removeChild(oldChild: Node): Node
+XMLDocument[JC] def removeEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], options: EventListenerOptions): Unit
+XMLDocument[JC] def removeEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], useCapture: Boolean?): Unit
+XMLDocument[JC] def replaceChild(newChild: Node, oldChild: Node): Node
+XMLDocument[JC] def replaceChildren(nodes: Node | String*): Unit
+XMLDocument[JC] def styleSheets: StyleSheetList
+XMLDocument[JC] var textContent: String
+XMLDocument[JC] def visibilityState: VisibilityState | String
+XMLDocument[JC] var visibilitychange: js.Function1[Event, _]
 XMLHttpRequest[JC] def abort(): Unit
 XMLHttpRequest[JC] def addEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], options: EventListenerOptions): Unit
 XMLHttpRequest[JC] def addEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], useCapture: Boolean?): Unit
@@ -27647,6 +27803,7 @@ intl/DateTimeFormat[JC] def supportedLocalesOf(locales: String | js.Array[String
 intl/DateTimeFormatOptions[JT] var day: js.UndefOr[String]
 intl/DateTimeFormatOptions[JT] var era: js.UndefOr[String]
 intl/DateTimeFormatOptions[JT] var formatMatcher: js.UndefOr[String]
+intl/DateTimeFormatOptions[JT] var fractionalSecondDigits: js.UndefOr[Int]
 intl/DateTimeFormatOptions[JT] var hour: js.UndefOr[String]
 intl/DateTimeFormatOptions[JT] var hour12: js.UndefOr[Boolean]
 intl/DateTimeFormatOptions[JT] var localeMatcher: js.UndefOr[String]
diff --git a/api-reports/2_13.txt b/api-reports/2_13.txt
index 0d273a2be..b9f9637ca 100644
--- a/api-reports/2_13.txt
+++ b/api-reports/2_13.txt
@@ -1348,6 +1348,12 @@ CompositionEventInit[JT] var detail: js.UndefOr[Int]
 CompositionEventInit[JT] var locale: js.UndefOr[String]
 CompositionEventInit[JT] var scoped: js.UndefOr[Boolean]
 CompositionEventInit[JT] var view: js.UndefOr[Window]
+CompressionFormat[JT]
+CompressionFormat[SO] val deflate: CompressionFormat
+CompressionFormat[SO] val `deflate-raw`: CompressionFormat
+CompressionFormat[SO] val gzip: CompressionFormat
+CompressionStream[JC] def readable: ReadableStream[Uint8Array]
+CompressionStream[JC] def writable: WriteableStream[Uint8Array]
 ConcatParams[JT] val algorithmId: BufferSource
 ConcatParams[JT] val hash: HashAlgorithmIdentifier
 ConcatParams[JT] val name: String
@@ -1496,6 +1502,10 @@ DOMRect[JC] def x: Double
 DOMRect[JC] def x_ = (x: Double): Unit
 DOMRect[JC] def y: Double
 DOMRect[JC] def y_ = (y: Double): Unit
+DOMRectInit[JT] var height: js.UndefOr[Double]
+DOMRectInit[JT] var width: js.UndefOr[Double]
+DOMRectInit[JT] var x: js.UndefOr[Double]
+DOMRectInit[JT] var y: js.UndefOr[Double]
 DOMRectList[JC] @JSBracketAccess def apply(index: Int): T
 DOMRectList[JC] def length: Int
 DOMRectReadOnly[JT] def bottom: Double
@@ -1561,6 +1571,8 @@ DataTransferItemList[JC] @js.annotation.JSBracketAccess def apply(index: Int): D
 DataTransferItemList[JC] def clear(): Unit
 DataTransferItemList[JC] def length: Int
 DataTransferItemList[JC] def remove(index: Int): Unit
+DecompressionStream[JC] def readable: ReadableStream[Uint8Array]
+DecompressionStream[JC] def writable: WriteableStream[Uint8Array]
 DedicatedWorkerGlobalScope[JO] def self: DedicatedWorkerGlobalScope
 DedicatedWorkerGlobalScope[JT] def addEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], options: EventListenerOptions): Unit
 DedicatedWorkerGlobalScope[JT] def addEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], useCapture: Boolean?): Unit
@@ -1725,7 +1737,11 @@ Document[JC] def createCDATASection(data: String): CDATASection
 Document[JC] def createComment(data: String): Comment
 Document[JC] def createDocumentFragment(): DocumentFragment
 Document[JC] def createElement(tagName: String): Element
+Document[JC] def createElement(tagName: String, options: ElementCreationOptions): Element
+Document[JC] def createElement(tagName: String, options: String): Element
 Document[JC] def createElementNS(namespaceURI: String, qualifiedName: String): Element
+Document[JC] def createElementNS(namespaceURI: String, qualifiedName: String, options: ElementCreationOptions): Element
+Document[JC] def createElementNS(namespaceURI: String, qualifiedName: String, options: String): Element
 Document[JC] def createEvent(eventInterface: String): Event
 Document[JC] def createNSResolver(node: Node): XPathNSResolver
 Document[JC] def createNodeIterator(root: Node, whatToShow: Int, filter: NodeFilter, entityReferenceExpansion: Boolean): NodeIterator
@@ -2065,6 +2081,7 @@ Element[JC] def setAttributeNodeNS(newAttr: Attr): Attr
 Element[JC] def shadowRoot: ShadowRoot
 Element[JC] def tagName: String
 Element[JC] var textContent: String
+ElementCreationOptions[JT] var is: js.UndefOr[String]
 ElementDefinitionOptions[JT] var `extends`: js.UndefOr[String]
 EndOfStreamError[JT]
 EndOfStreamError[SO] val decode: EndOfStreamError
@@ -2286,7 +2303,18 @@ FocusEventInit[JT] var scoped: js.UndefOr[Boolean]
 FocusEventInit[JT] var view: js.UndefOr[Window]
 FocusOptions[JT] var focusVisible: js.UndefOr[Boolean]
 FocusOptions[JT] var preventScroll: js.UndefOr[Boolean]
-FormData[JC] def append(name: js.Any, value: js.Any, blobName: String?): Unit
+FormData[JC] def append(name: String, value: Blob, blobName: String?): Unit
+FormData[JC] def append(name: String, value: String): Unit
+FormData[JC] def delete(name: String): Unit
+FormData[JC] def entries(): js.Iterator[js.Tuple2[String, String | Blob]]
+FormData[JC] def get(name: String): String | Blob
+FormData[JC] def getAll(name: String): js.Array[String | Blob]
+FormData[JC] def has(name: String): Boolean
+FormData[JC] @JSName(js.Symbol.iterator) override def jsIterator(): js.Iterator[js.Tuple2[String, String | Blob]]
+FormData[JC] def keys(): js.Iterator[String]
+FormData[JC] def set(name: String, value: Blob, blobName: String?): Unit
+FormData[JC] def set(name: String, value: String): Unit
+FormData[JC] def values(): js.Iterator[String | Blob]
 FormData[JO]
 FrameType[JT]
 FrameType[SO] val auxiliary: FrameType
@@ -2380,6 +2408,7 @@ HTMLAnchorElement[JC] var contentEditable: String
 HTMLAnchorElement[JC] def dataset: js.Dictionary[String]
 HTMLAnchorElement[JC] var dir: String
 HTMLAnchorElement[JC] def dispatchEvent(evt: Event): Boolean
+HTMLAnchorElement[JC] var download: String
 HTMLAnchorElement[JC] var draggable: Boolean
 HTMLAnchorElement[JC] var filters: Object
 HTMLAnchorElement[JC] def firstChild: Node
@@ -4901,7 +4930,11 @@ HTMLDocument[JC] def createCDATASection(data: String): CDATASection
 HTMLDocument[JC] def createComment(data: String): Comment
 HTMLDocument[JC] def createDocumentFragment(): DocumentFragment
 HTMLDocument[JC] def createElement(tagName: String): Element
+HTMLDocument[JC] def createElement(tagName: String, options: ElementCreationOptions): Element
+HTMLDocument[JC] def createElement(tagName: String, options: String): Element
 HTMLDocument[JC] def createElementNS(namespaceURI: String, qualifiedName: String): Element
+HTMLDocument[JC] def createElementNS(namespaceURI: String, qualifiedName: String, options: ElementCreationOptions): Element
+HTMLDocument[JC] def createElementNS(namespaceURI: String, qualifiedName: String, options: String): Element
 HTMLDocument[JC] def createEvent(eventInterface: String): Event
 HTMLDocument[JC] def createNSResolver(node: Node): XPathNSResolver
 HTMLDocument[JC] def createNodeIterator(root: Node, whatToShow: Int, filter: NodeFilter, entityReferenceExpansion: Boolean): NodeIterator
@@ -15502,6 +15535,30 @@ 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: FrozenArray[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: DOMRectInit
+IntersectionObserverEntryInit[JT] var intersectionRatio: Double
+IntersectionObserverEntryInit[JT] var intersectionRect: DOMRectInit
+IntersectionObserverEntryInit[JT] var isIntersecting: Boolean
+IntersectionObserverEntryInit[JT] var rootBounds: DOMRectInit
+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
@@ -16420,13 +16477,20 @@ Navigator[JC] def mediaDevices: MediaDevices
 Navigator[JC] def onLine: Boolean
 Navigator[JC] val permissions: Permissions
 Navigator[JC] def platform: String
+Navigator[JC] def registerProtocolHandler(scheme: String, url: String): Unit
+Navigator[JC] def registerProtocolHandler(scheme: String, url: URL): Unit
 Navigator[JC] def sendBeacon(url: String, data: BodyInit?): Boolean
 Navigator[JC] val serviceWorker: ServiceWorkerContainer
 Navigator[JC] def storage: StorageManager
+Navigator[JC] def unregisterProtocolHandler(scheme: String, url: String): Unit
+Navigator[JC] def unregisterProtocolHandler(scheme: String, url: URL): Unit
 Navigator[JC] def userAgent: String
 Navigator[JC] def vibrate(duration: Double): Boolean
 Navigator[JC] def vibrate(pattern: js.Array[Double]): Boolean
-NavigatorContentUtils[JT]
+NavigatorContentUtils[JT] def registerProtocolHandler(scheme: String, url: String): Unit
+NavigatorContentUtils[JT] def registerProtocolHandler(scheme: String, url: URL): Unit
+NavigatorContentUtils[JT] def unregisterProtocolHandler(scheme: String, url: String): Unit
+NavigatorContentUtils[JT] def unregisterProtocolHandler(scheme: String, url: URL): Unit
 NavigatorGeolocation[JT] def geolocation: Geolocation
 NavigatorID[JT] def appName: String
 NavigatorID[JT] def appVersion: String
@@ -26181,6 +26245,7 @@ URL[JC] var search: String
 URL[JC] var searchParams: URLSearchParams
 URL[JC] var username: String
 URL[JO] def createObjectURL(blob: Blob): String
+URL[JO] def createObjectURL(src: MediaSource): String
 URL[JO] def revokeObjectURL(url: String): Unit
 URLSearchParams[JC] def append(name: String, value: String): Unit
 URLSearchParams[JC] def delete(name: String): Unit
@@ -27071,6 +27136,97 @@ WriteableStream[JT] val closed: js.Promise[WriteableStream[T]]
 WriteableStream[JT] val ready: js.Promise[WriteableStream[T]]
 WriteableStream[JT] def state: WriteableState
 WriteableStream[JT] def write(chunk: Chunk[T]): js.Promise[Any]
+XMLDocument[JC] def addEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], options: EventListenerOptions): Unit
+XMLDocument[JC] def addEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], useCapture: Boolean?): Unit
+XMLDocument[JC] def adoptNode(source: Node): Node
+XMLDocument[JC] def appendChild(newChild: Node): Node
+XMLDocument[JC] def baseURI: String
+XMLDocument[JC] def characterSet: String
+XMLDocument[JC] def childElementCount: Int
+XMLDocument[JC] def childNodes: NodeList[Node]
+XMLDocument[JC] def children: HTMLCollection[Element]
+XMLDocument[JC] def cloneNode(deep: Boolean?): Node
+XMLDocument[JC] def compareDocumentPosition(other: Node): Int
+XMLDocument[JC] def contains(otherNode: Node): Boolean
+XMLDocument[JC] def createAttribute(name: String): Attr
+XMLDocument[JC] def createAttributeNS(namespaceURI: String, qualifiedName: String): Attr
+XMLDocument[JC] def createCDATASection(data: String): CDATASection
+XMLDocument[JC] def createComment(data: String): Comment
+XMLDocument[JC] def createDocumentFragment(): DocumentFragment
+XMLDocument[JC] def createElement(tagName: String): Element
+XMLDocument[JC] def createElement(tagName: String, options: ElementCreationOptions): Element
+XMLDocument[JC] def createElement(tagName: String, options: String): Element
+XMLDocument[JC] def createElementNS(namespaceURI: String, qualifiedName: String): Element
+XMLDocument[JC] def createElementNS(namespaceURI: String, qualifiedName: String, options: ElementCreationOptions): Element
+XMLDocument[JC] def createElementNS(namespaceURI: String, qualifiedName: String, options: String): Element
+XMLDocument[JC] def createEvent(eventInterface: String): Event
+XMLDocument[JC] def createNSResolver(node: Node): XPathNSResolver
+XMLDocument[JC] def createNodeIterator(root: Node, whatToShow: Int, filter: NodeFilter, entityReferenceExpansion: Boolean): NodeIterator
+XMLDocument[JC] def createProcessingInstruction(target: String, data: String): ProcessingInstruction
+XMLDocument[JC] def createRange(): Range
+XMLDocument[JC] def createStyleSheet(href: String?, index: Int?): CSSStyleSheet
+XMLDocument[JC] def createTextNode(data: String): Text
+XMLDocument[JC] def createTreeWalker(root: Node, whatToShow: Int, filter: NodeFilter, entityReferenceExpansion: Boolean): TreeWalker
+XMLDocument[JC] def dispatchEvent(evt: Event): Boolean
+XMLDocument[JC] def doctype: DocumentType
+XMLDocument[JC] def documentElement: Element
+XMLDocument[JC] def documentURI: String
+XMLDocument[JC] def elementFromPoint(x: Double, y: Double): Element
+XMLDocument[JC] def evaluate(xpathExpression: String, contextNode: Node, namespaceResolver: XPathNSResolver, resultType: Int, result: XPathResult): XPathResult
+XMLDocument[JC] def evaluate(xpathExpression: String, contextNode: Node, namespaceResolver: js.Function1[String, String], resultType: Int, result: XPathResult): XPathResult
+XMLDocument[JC] def exitFullscreen(): js.Promise[Unit]
+XMLDocument[JC] def exitPointerLock(): Unit
+XMLDocument[JC] def firstChild: Node
+XMLDocument[JC] def firstElementChild: Element
+XMLDocument[JC] def fullscreenElement: Element
+XMLDocument[JC] def fullscreenEnabled: Boolean
+XMLDocument[JC] def getElementById(elementId: String): Element
+XMLDocument[JC] def getElementsByClassName(classNames: String): HTMLCollection[Element]
+XMLDocument[JC] def getElementsByName(elementName: String): NodeList[Node]
+XMLDocument[JC] def getElementsByTagName(name: String): HTMLCollection[Element]
+XMLDocument[JC] def getElementsByTagNameNS(namespaceURI: String, localName: String): HTMLCollection[Element]
+XMLDocument[JC] def hasChildNodes(): Boolean
+XMLDocument[JC] def hidden: Boolean
+XMLDocument[JC] def implementation: DOMImplementation
+XMLDocument[JC] def importNode(importedNode: Node, deep: Boolean): Node
+XMLDocument[JC] var innerText: String
+XMLDocument[JC] def insertBefore(newChild: Node, refChild: Node): Node
+XMLDocument[JC] def isConnected: Boolean
+XMLDocument[JC] def isDefaultNamespace(namespaceURI: String): Boolean
+XMLDocument[JC] def isEqualNode(arg: Node): Boolean
+XMLDocument[JC] def isSameNode(other: Node): Boolean
+XMLDocument[JC] def isSupported(feature: String, version: String): Boolean
+XMLDocument[JC] def lastChild: Node
+XMLDocument[JC] def lastElementChild: Element
+XMLDocument[JC] def lastModified: String
+XMLDocument[JC] def localName: String
+XMLDocument[JC] def lookupNamespaceURI(prefix: String): String
+XMLDocument[JC] def lookupPrefix(namespaceURI: String): String
+XMLDocument[JC] def namespaceURI: String
+XMLDocument[JC] def nextSibling: Node
+XMLDocument[JC] def nodeName: String
+XMLDocument[JC] def nodeType: Int
+XMLDocument[JC] var nodeValue: String
+XMLDocument[JC] def normalize(): Unit
+XMLDocument[JC] var onfullscreenchange: js.Function1[Event, _]
+XMLDocument[JC] var onfullscreenerror: js.Function1[Event, _]
+XMLDocument[JC] var onpointerlockchange: js.Function1[Event, _]
+XMLDocument[JC] var onpointerlockerror: js.Function1[Event, _]
+XMLDocument[JC] def ownerDocument: Document
+XMLDocument[JC] def parentNode: Node
+XMLDocument[JC] def pointerLockElement: Element
+XMLDocument[JC] def previousSibling: Node
+XMLDocument[JC] def querySelector(selectors: String): Element
+XMLDocument[JC] def querySelectorAll(selectors: String): NodeList[Element]
+XMLDocument[JC] def removeChild(oldChild: Node): Node
+XMLDocument[JC] def removeEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], options: EventListenerOptions): Unit
+XMLDocument[JC] def removeEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], useCapture: Boolean?): Unit
+XMLDocument[JC] def replaceChild(newChild: Node, oldChild: Node): Node
+XMLDocument[JC] def replaceChildren(nodes: Node | String*): Unit
+XMLDocument[JC] def styleSheets: StyleSheetList
+XMLDocument[JC] var textContent: String
+XMLDocument[JC] def visibilityState: VisibilityState | String
+XMLDocument[JC] var visibilitychange: js.Function1[Event, _]
 XMLHttpRequest[JC] def abort(): Unit
 XMLHttpRequest[JC] def addEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], options: EventListenerOptions): Unit
 XMLHttpRequest[JC] def addEventListener[T <: Event](`type`: String, listener: js.Function1[T, _], useCapture: Boolean?): Unit
@@ -27647,6 +27803,7 @@ intl/DateTimeFormat[JC] def supportedLocalesOf(locales: String | js.Array[String
 intl/DateTimeFormatOptions[JT] var day: js.UndefOr[String]
 intl/DateTimeFormatOptions[JT] var era: js.UndefOr[String]
 intl/DateTimeFormatOptions[JT] var formatMatcher: js.UndefOr[String]
+intl/DateTimeFormatOptions[JT] var fractionalSecondDigits: js.UndefOr[Int]
 intl/DateTimeFormatOptions[JT] var hour: js.UndefOr[String]
 intl/DateTimeFormatOptions[JT] var hour12: js.UndefOr[Boolean]
 intl/DateTimeFormatOptions[JT] var localeMatcher: js.UndefOr[String]
diff --git a/dom/src/main/scala-2/org/scalajs/dom/CompressionFormat.scala b/dom/src/main/scala-2/org/scalajs/dom/CompressionFormat.scala
new file mode 100644
index 000000000..220dcc8f4
--- /dev/null
+++ b/dom/src/main/scala-2/org/scalajs/dom/CompressionFormat.scala
@@ -0,0 +1,14 @@
+package org.scalajs.dom
+
+import scala.scalajs.js
+
+@js.native
+sealed trait CompressionFormat extends js.Any
+
+object CompressionFormat {
+  val deflate: CompressionFormat = "deflate".asInstanceOf[CompressionFormat]
+
+  val `deflate-raw`: CompressionFormat = "deflate-raw".asInstanceOf[CompressionFormat]
+
+  val gzip: CompressionFormat = "gzip".asInstanceOf[CompressionFormat]
+}
diff --git a/dom/src/main/scala-3/org/scalajs/dom/CompressionFormat.scala b/dom/src/main/scala-3/org/scalajs/dom/CompressionFormat.scala
new file mode 100644
index 000000000..cd5d630bc
--- /dev/null
+++ b/dom/src/main/scala-3/org/scalajs/dom/CompressionFormat.scala
@@ -0,0 +1,13 @@
+package org.scalajs.dom
+
+import scala.scalajs.js
+
+opaque type CompressionFormat <: String = String
+
+object CompressionFormat {
+  val deflate: CompressionFormat = "deflate"
+
+  val `deflate-raw`: CompressionFormat = "deflate-raw"
+
+  val gzip: CompressionFormat = "gzip"
+}
diff --git a/dom/src/main/scala/org/scalajs/dom/CompressionStream.scala b/dom/src/main/scala/org/scalajs/dom/CompressionStream.scala
new file mode 100644
index 000000000..7842b46a4
--- /dev/null
+++ b/dom/src/main/scala/org/scalajs/dom/CompressionStream.scala
@@ -0,0 +1,19 @@
+/** All documentation for facades is thanks to Mozilla Contributors at https://developer.mozilla.org/en-US/docs/Web/API
+  * and available under the Creative Commons Attribution-ShareAlike v2.5 or later.
+  * http://creativecommons.org/licenses/by-sa/2.5/
+  *
+  * Everything else is under the MIT License http://opensource.org/licenses/MIT
+  */
+package org.scalajs.dom
+
+import scala.scalajs.js
+import scala.scalajs.js.annotation._
+import scala.scalajs.js.typedarray.Uint8Array
+
+/** An API for compressing a stream of data. */
+@js.native
+@JSGlobal
+class CompressionStream(format: CompressionFormat) extends js.Object {
+  def readable: ReadableStream[Uint8Array] = js.native
+  def writable: WriteableStream[Uint8Array] = js.native
+}
diff --git a/dom/src/main/scala/org/scalajs/dom/DOMRectInit.scala b/dom/src/main/scala/org/scalajs/dom/DOMRectInit.scala
new file mode 100644
index 000000000..5677ebba2
--- /dev/null
+++ b/dom/src/main/scala/org/scalajs/dom/DOMRectInit.scala
@@ -0,0 +1,13 @@
+package org.scalajs.dom
+
+import scala.scalajs.js
+
+trait DOMRectInit extends js.Object {
+  var x: js.UndefOr[Double] = js.undefined
+
+  var y: js.UndefOr[Double] = js.undefined
+
+  var width: js.UndefOr[Double] = js.undefined
+
+  var height: js.UndefOr[Double] = js.undefined
+}
diff --git a/dom/src/main/scala/org/scalajs/dom/DecompressionStream.scala b/dom/src/main/scala/org/scalajs/dom/DecompressionStream.scala
new file mode 100644
index 000000000..8eb1f9ccb
--- /dev/null
+++ b/dom/src/main/scala/org/scalajs/dom/DecompressionStream.scala
@@ -0,0 +1,19 @@
+/** All documentation for facades is thanks to Mozilla Contributors at https://developer.mozilla.org/en-US/docs/Web/API
+  * and available under the Creative Commons Attribution-ShareAlike v2.5 or later.
+  * http://creativecommons.org/licenses/by-sa/2.5/
+  *
+  * Everything else is under the MIT License http://opensource.org/licenses/MIT
+  */
+package org.scalajs.dom
+
+import scala.scalajs.js
+import scala.scalajs.js.annotation._
+import scala.scalajs.js.typedarray.Uint8Array
+
+/** An API for decompressing a stream of data. */
+@js.native
+@JSGlobal
+class DecompressionStream(format: CompressionFormat) extends js.Object {
+  def readable: ReadableStream[Uint8Array] = js.native
+  def writable: WriteableStream[Uint8Array] = js.native
+}
diff --git a/dom/src/main/scala/org/scalajs/dom/Document.scala b/dom/src/main/scala/org/scalajs/dom/Document.scala
index e3fc43f27..691270fe3 100644
--- a/dom/src/main/scala/org/scalajs/dom/Document.scala
+++ b/dom/src/main/scala/org/scalajs/dom/Document.scala
@@ -126,9 +126,17 @@ abstract class Document extends Node with NodeSelector with DocumentEvent with P
     */
   def createElement(tagName: String): Element = js.native
 
+  def createElement(tagName: String, options: String): Element = js.native
+
+  def createElement(tagName: String, options: ElementCreationOptions): Element = js.native
+
   /** Creates an element with the specified namespace URI and qualified name. */
   def createElementNS(namespaceURI: String, qualifiedName: String): Element = js.native
 
+  def createElementNS(namespaceURI: String, qualifiedName: String, options: String): Element = js.native
+
+  def createElementNS(namespaceURI: String, qualifiedName: String, options: ElementCreationOptions): Element = js.native
+
   /** createAttribute creates a new attribute node, and returns it. */
   def createAttribute(name: String): Attr = js.native
 
diff --git a/dom/src/main/scala/org/scalajs/dom/ElementCreationOptions.scala b/dom/src/main/scala/org/scalajs/dom/ElementCreationOptions.scala
new file mode 100644
index 000000000..c16e82ac2
--- /dev/null
+++ b/dom/src/main/scala/org/scalajs/dom/ElementCreationOptions.scala
@@ -0,0 +1,7 @@
+package org.scalajs.dom
+
+import scala.scalajs.js
+
+trait ElementCreationOptions extends js.Object {
+  var is: js.UndefOr[String] = js.undefined
+}
diff --git a/dom/src/main/scala/org/scalajs/dom/FormData.scala b/dom/src/main/scala/org/scalajs/dom/FormData.scala
index 6e0735561..fe73f6633 100644
--- a/dom/src/main/scala/org/scalajs/dom/FormData.scala
+++ b/dom/src/main/scala/org/scalajs/dom/FormData.scala
@@ -8,6 +8,7 @@ package org.scalajs.dom
 
 import scala.scalajs.js
 import scala.scalajs.js.annotation._
+import scala.scalajs.js.|
 
 /** XMLHttpRequest Level 2 adds support for the new FormData interface. FormData objects provide a way to easily
   * construct a set of key/value pairs representing form fields and their values, which can then be easily sent using
@@ -15,10 +16,108 @@ import scala.scalajs.js.annotation._
   */
 @js.native
 @JSGlobal
-class FormData(form: HTMLFormElement = js.native) extends js.Object {
+class FormData extends js.Iterable[js.Tuple2[String, String | Blob]] {
 
-  /** Appends a key/value pair to the FormData object. */
-  def append(name: js.Any, value: js.Any, blobName: String = js.native): Unit = js.native
+  def this(form: HTMLFormElement) = this()
+
+  def this(form: HTMLFormElement, submitter: HTMLElement) = this()
+
+  /** The `append()` method of the `FormData` interface appends a new value onto an existing key inside a `FormData`
+    * object, or adds the key if it does not already exist.
+    *
+    * @param name
+    *   The name of the field whose data is contained in value.
+    * @param value
+    *   The field's value. This can be a string or `Blob` (including subclasses such as File). If none of these are
+    *   specified the value is converted to a string.
+    */
+  def append(name: String, value: String): Unit = js.native
+
+  /** The `append()` method of the `FormData` interface appends a new value onto an existing key inside a `FormData`
+    * object, or adds the key if it does not already exist.
+    *
+    * @param name
+    *   The name of the field whose data is contained in value.
+    * @param value
+    *   The field's value. This can be a string or `Blob` (including subclasses such as File). If none of these are
+    *   specified the value is converted to a string.
+    * @param blobName
+    *   The filename reported to the server (a string), when a `Blob` or `File` is passed as the second parameter. The
+    *   default filename for `Blob` objects is "blob". The default filename for `File` objects is the file's filename.
+    */
+  def append(name: String, value: Blob, blobName: String = js.native): Unit = js.native
+
+  /** The `delete()` method of the `FormData` interface deletes a key and its value(s) from a `FormData` object.
+    * @param name
+    *   The name of the key you want to delete.
+    */
+  def delete(name: String): Unit = js.native
+
+  /** The `get()` method of the `FormData` interface returns the first value associated with a given key from within a
+    * `FormData` object. If you expect multiple values and want all of them, use the `getAll()` method instead.
+    *
+    * @param name
+    *   A string representing the name of the key you want to retrieve.
+    * @return
+    *   A value whose key matches the specified name. Otherwise, `null`.
+    */
+  def get(name: String): String | Blob = js.native
+
+  /** The `has()` method of the `FormData` interface returns whether a `FormData` object contains a certain key.
+    *
+    * @param name
+    *   A string representing the name of the key you want to test for.
+    * @return
+    *   `true` if a key of `FormData` matches the specified name. Otherwise, `false`.
+    */
+  def has(name: String): Boolean = js.native
+
+  /** The `set()` method of the `FormData` interface sets a new value for an existing key inside a `FormData` object, or
+    * adds the key/value if it does not already exist.
+    *
+    * @param name
+    *   The name of the field whose data is contained in value.
+    * @param value
+    *   The field's value.
+    */
+  def set(
+      name: String, value: String
+  ): Unit = js.native
+
+  /** The `set()` method of the `FormData` interface sets a new value for an existing key inside a `FormData` object, or
+    * adds the key/value if it does not already exist.
+    *
+    * @param name
+    *   The name of the field whose data is contained in value.
+    * @param value
+    *   The field's value.
+    */
+  def set(
+      name: String, value: Blob, blobName: String = js.native
+  ): Unit = js.native
+
+  @JSName(js.Symbol.iterator)
+  override def jsIterator(): js.Iterator[js.Tuple2[String, String | Blob]] = js.native
+
+  /** The `FormData.entries()` method returns an iterator which iterates through all key/value pairs contained in the
+    * `FormData`. The key of each pair is a string object, and the value is either a string or a `Blob`.
+    */
+  def entries(): js.Iterator[js.Tuple2[String, String | Blob]] = js.native
+
+  /** The `getAll()` method of the `FormData` interface returns all the values associated with a given key from within a
+    * `FormData` object.
+    */
+  def getAll(name: String): js.Array[String | Blob] = js.native
+
+  /** The `FormData.keys()` method returns an iterator which iterates through all keys contained in the `FormData`. The
+    * keys are strings.
+    */
+  def keys(): js.Iterator[String] = js.native
+
+  /** The `FormData.values()` method returns an iterator which iterates through all values contained in the `FormData`.
+    * The values are strings or `Blob` objects.
+    */
+  def values(): js.Iterator[String | Blob] = js.native
 }
 
 @js.native
diff --git a/dom/src/main/scala/org/scalajs/dom/HTMLAnchorElement.scala b/dom/src/main/scala/org/scalajs/dom/HTMLAnchorElement.scala
index 3a030755f..9c1c08ae3 100644
--- a/dom/src/main/scala/org/scalajs/dom/HTMLAnchorElement.scala
+++ b/dom/src/main/scala/org/scalajs/dom/HTMLAnchorElement.scala
@@ -17,6 +17,12 @@ import scala.scalajs.js.annotation._
 @JSGlobal
 abstract class HTMLAnchorElement extends HTMLElement {
 
+  /** A string indicating that the linked resource is intended to be downloaded rather than displayed in the browser.
+    * The value represent the proposed name of the file. If the name is not a valid filename of the underlying OS,
+    * browser will adapt it.
+    */
+  var download: String = js.native
+
   /** Is a DOMString that reflects the rel HTML attribute, specifying the relationship of the target object to the link
     * object.
     */
@@ -25,7 +31,7 @@ abstract class HTMLAnchorElement extends HTMLElement {
   /** Is a DOMString representing the protocol component, including trailing colon (':'), of the referenced URL. */
   var protocol: String = js.native
 
-  /** Is a DOMString representing tThe search element, including leading question mark ('?'), if any, of the referenced
+  /** Is a DOMString representing the search element, including leading question mark ('?'), if any, of the referenced
     * URL.
     */
   var search: String = js.native
diff --git a/dom/src/main/scala/org/scalajs/dom/IntersectionObserver.scala b/dom/src/main/scala/org/scalajs/dom/IntersectionObserver.scala
new file mode 100644
index 000000000..bc7f40158
--- /dev/null
+++ b/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],
+    options: IntersectionObserverInit = js.native
+) 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: FrozenArray[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
+}
diff --git a/dom/src/main/scala/org/scalajs/dom/IntersectionObserverEntry.scala b/dom/src/main/scala/org/scalajs/dom/IntersectionObserverEntry.scala
new file mode 100644
index 000000000..0a9c46d0c
--- /dev/null
+++ b/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
+}
diff --git a/dom/src/main/scala/org/scalajs/dom/IntersectionObserverEntryInit.scala b/dom/src/main/scala/org/scalajs/dom/IntersectionObserverEntryInit.scala
new file mode 100644
index 000000000..08b1e26bd
--- /dev/null
+++ b/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: DOMRectInit
+
+  var intersectionRatio: Double
+
+  var intersectionRect: DOMRectInit
+
+  var isIntersecting: Boolean
+
+  var rootBounds: DOMRectInit
+
+  var target: Element
+
+  var time: Double
+}
diff --git a/dom/src/main/scala/org/scalajs/dom/IntersectionObserverInit.scala b/dom/src/main/scala/org/scalajs/dom/IntersectionObserverInit.scala
new file mode 100644
index 000000000..2f965f43c
--- /dev/null
+++ b/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
+}
diff --git a/dom/src/main/scala/org/scalajs/dom/NavigatorContentUtils.scala b/dom/src/main/scala/org/scalajs/dom/NavigatorContentUtils.scala
index 088ecc656..e4ba71fda 100644
--- a/dom/src/main/scala/org/scalajs/dom/NavigatorContentUtils.scala
+++ b/dom/src/main/scala/org/scalajs/dom/NavigatorContentUtils.scala
@@ -9,4 +9,66 @@ package org.scalajs.dom
 import scala.scalajs.js
 
 @js.native
-trait NavigatorContentUtils extends js.Object
+trait NavigatorContentUtils extends js.Object {
+
+  /** The Navigator method registerProtocolHandler() lets websites register their ability to open or handle particular
+    * URL schemes (aka protocols).
+    *
+    * For example, this API lets webmail sites open mailto: URLs, or VoIP sites open tel: URLs.
+    *
+    * @see
+    *   https://developer.mozilla.org/en-US/docs/Web/API/Navigator/registerProtocolHandler
+    *
+    * @param scheme
+    *   A string containing the permitted scheme for the protocol that the site wishes to handle. For example, you can
+    *   register to handle SMS text message links by passing the "sms" scheme.
+    * @param url
+    *   A string containing the URL of the handler. This URL must include %s, as a placeholder that will be replaced
+    *   with the escaped URL to be handled.
+    * @return
+    *   undefined
+    *
+    * @throws DOMException.SECURITY_ERR
+    *   The user agent blocked the registration. This might happen if:
+    *   - The registered scheme (protocol) is invalid, such as a scheme the browser handles itself (https:, about:,
+    *     etc.)
+    *   - The handler URL's origin does not match the origin of the page calling this API.
+    *   - The browser requires that this function is called from a secure context.
+    *   - The browser requires that the handler's URL be over HTTPS.
+    *
+    * @throws DOMException.SYNTAX_ERR
+    *   The %s placeholder is missing from the handler URL
+    */
+  def registerProtocolHandler(scheme: String, url: String): Unit = js.native
+  def registerProtocolHandler(scheme: String, url: URL): Unit = js.native
+
+  /** The Navigator method unregisterProtocolHandler() removes a protocol handler for a given URL scheme.
+    *
+    * This method is the inverse of registerProtocolHandler().
+    *
+    * @see
+    *   https://developer.mozilla.org/en-US/docs/Web/API/Navigator/unregisterProtocolHandler
+    *
+    * @param scheme
+    *   A string containing the permitted scheme in the protocol handler that will be unregistered. For example, you can
+    *   unregister the handler for SMS text message links by passing the "sms" scheme.
+    * @param url
+    *   A string containing the URL of the handler. This URL should match the one that was used to register the handler
+    *   (e.g. it must include %s).
+    * @return
+    *   undefined
+    *
+    * @throws DOMException.SECURITY_ERR
+    *   The user agent blocked unregistration. This might happen if:
+    *   - The registered scheme (protocol) is invalid, such as a scheme the browser handles itself (https:, about:,
+    *     etc.)
+    *   - The handler URL's origin does not match the origin of the page calling this API.
+    *   - The browser requires that this function is called from a secure context.
+    *   - The browser requires that the handler's URL be over HTTPS.
+    *
+    * @throws DOMException.SYNTAX_ERR
+    *   The %s placeholder is missing from the handler URL
+    */
+  def unregisterProtocolHandler(scheme: String, url: String): Unit = js.native
+  def unregisterProtocolHandler(scheme: String, url: URL): Unit = js.native
+}
diff --git a/dom/src/main/scala/org/scalajs/dom/URL.scala b/dom/src/main/scala/org/scalajs/dom/URL.scala
index ccd0f0a7f..aea3f3933 100644
--- a/dom/src/main/scala/org/scalajs/dom/URL.scala
+++ b/dom/src/main/scala/org/scalajs/dom/URL.scala
@@ -16,9 +16,12 @@ object URL extends js.Object {
 
   /** The URL.createObjectURL() static method creates a DOMString containing an URL representing the object given in
     * parameter. The URL lifetime is tied to the document in the window on which it was created. The new object URL
-    * represents the specified File object or Blob object.
+    * represents the specified File, Blob or MediaSource object.
     */
   def createObjectURL(blob: Blob): String = js.native
+
+  def createObjectURL(src: MediaSource): String = js.native
+
 }
 
 /** The URL() constructor returns a newly created URL object representing the URL defined by the parameters. */
diff --git a/dom/src/main/scala/org/scalajs/dom/XMLDocument.scala b/dom/src/main/scala/org/scalajs/dom/XMLDocument.scala
new file mode 100644
index 000000000..aa5580230
--- /dev/null
+++ b/dom/src/main/scala/org/scalajs/dom/XMLDocument.scala
@@ -0,0 +1,18 @@
+/** All documentation for facades is thanks to Mozilla Contributors at https://developer.mozilla.org/en-US/docs/Web/API
+  * and available under the Creative Commons Attribution-ShareAlike v2.5 or later.
+  * http://creativecommons.org/licenses/by-sa/2.5/
+  *
+  * Everything else is under the MIT License http://opensource.org/licenses/MIT
+  */
+package org.scalajs.dom
+
+import scala.scalajs.js
+import scala.scalajs.js.annotation._
+
+/** The [[XMLDocument]] interface represents an XML document. It inherits from the generic [[Document]] and does not add
+  * any specific methods or properties to it: nevertheless, several algorithms behave differently with the two types of
+  * documents.
+  */
+@js.native
+@JSGlobal
+class XMLDocument extends Document
diff --git a/dom/src/main/scala/org/scalajs/dom/intl/DateTimeFormatOptions.scala b/dom/src/main/scala/org/scalajs/dom/intl/DateTimeFormatOptions.scala
index 958b1b012..7cf4d415e 100644
--- a/dom/src/main/scala/org/scalajs/dom/intl/DateTimeFormatOptions.scala
+++ b/dom/src/main/scala/org/scalajs/dom/intl/DateTimeFormatOptions.scala
@@ -57,6 +57,11 @@ trait DateTimeFormatOptions extends js.Object {
 
   /** The representation of the time zone name. Possible values are "short", "long". */
   var timeZoneName: js.UndefOr[String] = js.undefined
+
+  /** The number of digits used to represent fractions of a second (any additional digits are truncated). Possible
+    * values are 1, 2, 3.
+    */
+  var fractionalSecondDigits: js.UndefOr[Int] = js.undefined
 }
 
 @deprecated("all members of DateTimeFormatOptions are deprecated", "2.0.0")
diff --git a/project/build.properties b/project/build.properties
index 46e43a97e..27430827b 100644
--- a/project/build.properties
+++ b/project/build.properties
@@ -1 +1 @@
-sbt.version=1.8.2
+sbt.version=1.9.6
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 3ff46f291..a9ce080ea 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -6,4 +6,4 @@ addSbtPlugin("com.eed3si9n"  % "sbt-buildinfo"       % "0.11.0")
 addSbtPlugin("com.github.sbt"  % "sbt-ci-release"      % "1.5.12")
 addSbtPlugin("com.lihaoyi"   % "scalatex-sbt-plugin" % "0.3.11")
 addSbtPlugin("org.scala-js"  % "sbt-scalajs"         % "1.7.1")
-addSbtPlugin("org.scalameta" % "sbt-scalafmt"        % "2.5.0")
+addSbtPlugin("org.scalameta" % "sbt-scalafmt"        % "2.5.2")