abstract external class FontData : JsAny {
 val family: String
 val fullName: String
 val postscriptName: String
 val style: String
 fun blob(): Promise<Blob>
}
fun Window.queryLocalFontsOrNull(): Promise<JsArray<FontData>>? {
 return if (supportedLocalFont().toBoolean()) queryLocalFonts() else null
}
fun Window.queryLocalFonts(): Promise<JsArray<FontData>> {
 return queryLocalFonts(this)
}
private fun supportedLocalFont(): JsBoolean =
 js("\"queryLocalFonts\" in window")
@Suppress("UNUSED_PARAMETER")
private fun queryLocalFonts(windowArg: Window): Promise<JsArray<FontData>> =
 js("windowArg.queryLocalFonts()")

abstract external class Permissions : JsAny {
 fun query(permissionDescriptor: JsAny): Promise<PermissionStatus>
}
abstract external class PermissionStatus : JsAny {
 val name: String
 val state: String
}
val Navigator.permissions: Permissions
 get() = permissions(this)
fun Permissions.query(name: String): Promise<PermissionStatus> =
 query(permissionDescriptor(name))
@Suppress("UNUSED_PARAMETER")
private fun permissions(navigatorArg: Navigator): Permissions =
 js("navigatorArg.permissions")
@Suppress("UNUSED_PARAMETER")
private fun permissionDescriptor(name: String): JsAny =
 js("({ name: name })")

fun Blob.arrayBuffer(): Promise<ArrayBuffer> {
 return arrayBuffer(this)
}
@Suppress("UNUSED_PARAMETER")
private fun arrayBuffer(blobArg: Blob): Promise<ArrayBuffer> =
 js("blobArg.arrayBuffer()")

abstract external class PictureInPictureWindow : JsAny {
 val height: Int
 val width: Int
 var onresize: ((Event) -> Unit)?
}
fun HTMLVideoElement.requestPictureInPicture(): Promise<PictureInPictureWindow> =
 requestPictureInPicture(this)
fun Document.exitPictureInPicture(): Promise<Nothing?> =
 exitPictureInPicture(this)
@Suppress("UNUSED_PARAMETER")
private fun requestPictureInPicture(videoArg: HTMLVideoElement): Promise<PictureInPictureWindow> =
 js("videoArg.requestPictureInPicture()")
@Suppress("UNUSED_PARAMETER")
private fun exitPictureInPicture(documentArg: Document): Promise<Nothing?> =
 js("documentArg.exitPictureInPicture()")