What about applications that contain a JS environment? Is this not lost when navigating away, unable to be rebuilt from cache by moving forward? What if my ap

What about applications that contain a JS environment? Is this not lost when navigating away, unable to be rebuilt from cache by moving forward? What if my application needs to do something during data entry that can't be replicated by auto-populating the fields? I believe this is taking power away from web developers and putting it into browser developers. That's a bad thing.