Observable stuff for scalatags-vdom
libraryDependencies += "com.marekkadek" %%% "scalatags-vdom-observable" % "0.0.2-SNAPSHOT"It doesn't come bundled with the underlying rx.js file, so you'll need to either add them manually or specify them as jsDependencies:
jsDependencies += "org.webjars.npm" % "rxjs" % "5.0.0-rc.4" / "bundles/Rx.min.js" commonJSName "Rx"It uses scalajs rx facade