When comparing Rivets vs Blocks.js, the Slant community recommends Rivets for most people. In the question“What are the best JavaScript libraries for building a UI?” Rivets is ranked 6th while Blocks.js is ranked 10th. The most important reason people chose Rivets is:
Rivets takes DOM element as input, which has special attributes prefixed with 'rv-'. So you may declare DOM element in whatever language you like, even in HTML.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Doesn't require special DOM declaration syntax like JSX
Rivets takes DOM element as input, which has special attributes prefixed with 'rv-'. So you may declare DOM element in whatever language you like, even in HTML.
Pro Small footprint
Blocks.js is just 16.5KB minified and gzipped. So it's pretty small.
Pro Modular structure
Apps developed with blocks.js are modular in structure and make use of reusable objects. This makes these applications very maintainable.
Cons
Con Seems to be abandoned
No new commits have been pushed since March 2015.
Con Relatively new
Blocks.js is a relatively new library. It doesn't have much support and there re not many people who use it. So if you run into any problems it would be hard to get solutions.