Warning: Reason support is experimental. We are looking for beta-tester and contributors.

object
  method hasExtension : Js.js_string Js.t -> bool Js.t Js.meth
  method requiredExtensions : Dom_svg.stringList Js.t Js.readonly_prop
  method requiredFeatures : Dom_svg.stringList Js.t Js.readonly_prop
  method systemLanguage : Dom_svg.stringList Js.t Js.readonly_prop
end