This is actually cool. Scala.js + scalatags has this looking like this:

```

  val model = div(
      button( onClick := decrement )( "-" ), // decrement is typechecked as being a function of event 
      div( float := float.letf )( model.toInt ) //left float is typechecked and hence the misspelling is caught at compile time so big changes can be made with confidence
  )

```