No front-end validation

Although the readme specifies that one of the goals is to use the same validation on the server side and on the front-end, I couldn't find anything to accomplish this.

I whipped up my own method, see here:
https://gist.github.com/Xananax/7178b559ba783a97b0a0

Two questions:
1) Is there already a system in place and I've just missed it?
2) I'd like some code review on what I've done, and if there is anything simpler, because it does seem like a lot of boilerplate.