gistfile1.txt

    ...
    val shoppingList = new ShoppingList()

    Bindings.ReactDOM.render(
      element   = shoppingList, // js console ERROR: Uncaught Error: Objects are not valid as a React child (found: object with keys {props, context, refs, updater}). If you meant to render a collection of children, use an array instead
      container = org.scalajs.dom.document.getElementById("container")) // sByClassName("myapp")(0) 
}

  @ScalaJSDefined
  class ShoppingList(
      jsProps: js.Object = js.Object.apply(),
      context: js.Any = null,
      updater: js.Any = null) 
      extends Bindings.Component() {
	  
	}

object Bindings {
    ...

    @JSImport(/* module */ "react", /* name */ "Component", /* globalFallback */ "React.Component")
    @js.native
    class Component(
  	      jsProps: js.Object = js.Object.apply(),
  	      context: js.Any = null,
  	      updater: js.Any = null)
        extends js.Object {
       
  	  val constructor: js.Any = js.native  	  
      def render(): js.Any = js.native
  	  
    }

}