NinjaScript is a JS framework, built on jQuery with two principles in mind. #1: Enriching your website with JS behaviors should be as easy as specifying CSS styles. #2: Making your site degrade gracefully without JS shouldn't take any extra work.
NinjaScript provides a simple, CSS-like syntax for applying behaviors, including transformations and event handlers, to your elements. NS handles it from there: as a developer, you won't ever have to think about binding or event delegation again.