There's a lot of great options online too that you can probably tackle in the same amount of time as a bootcamp. Only drawback that I see from online is that there aren't that many people you can instantly ask for feedback or help. There are also some services like this but not entirely free.
https://www.codecademy.com/learn/javascript
https://www.codeschool.com/learn/javascript
https://teamtreehouse.com/
There's also a handful of subreddits if you're on reddit: /r/learnprogramming /r/webdev /r/frontend /r/javascript to name a few.
There are also a few fundamental of comp sci courses you can view on itunes university. All free and it's from stanford.
Feel free to PM me if you've got any questions too.