I have worked on what I would call non-trivial Javascript applications, but only front-end javascript (no server-side js, apart from a few MongoDB map-reduce qu

I have worked on what I would call non-trivial Javascript applications, but only front-end javascript (no server-side js, apart from a few MongoDB map-reduce queries). My feelings towards js are are informed by that experience, and my (happier) experiences with other languages - which are primarily Python, Java and Objective-C, if you're interested.