You're describing an editor combined with a debugger. JS isn't your chrome inspector. You can't really do a like-for-like comparison. I encourage you to check

You're describing an editor combined with a debugger. JS isn't your chrome inspector. You can't really do a like-for-like comparison. I encourage you to check out Pharo or Squeak, and at least do the intro tutorial, to see the difference for yourself. That's not to be elitist, it's just really worth trying out.