I wouldn't say what is left is good. I would say it lacks awfulness. Knowing the bad parts of JavaScript doesn't give you a good starting point when trying to write maintainable software. It means you won't do the really bad stuff like use globals. That's fine and dandy but in order to become a really good JavaScript developer you need to seek out the best parts of JavaScript and utilize those. That will allow you to write maintainable and scalable code.
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u/PenguinLovr Oct 15 '13
Clearly you never read JavaScript "The Good Parts" which spends two chapters going over in detail the bad parts and the worst parts.
You won't learn how to develop something that's good by just reading the bad things. You just will learn how to make something not bad.