Source mapping will be helpful, but clearly fewer people than I'd expect know how to use the debugging tools in their browser to the extent that I use them. I

Source mapping will be helpful, but clearly fewer people than I'd expect know how to use the debugging tools in their browser to the extent that I use them. I don't want a line number, I want a break point or watch expression in my code while I'm debugging, I don't want to go back to my editor until I know the state of my app that's causing problems. It is all very minor, but it piles up and slows me down.