Working with Javascript as become heavier,slower and more complicated than Java. Sure you can automate code compilation(because that's what it is), but you still end up with grunt/gulp/fly builds that takes a minute or more... not really a write/refresh workflow and it doesn't make it more enjoyable than working with compiled language X or Z.
Usually the tools I use have finished execution (triggered by a save) before I even left the editor. It's much better in practice than it sounds in theory.
