When comparing CxJS vs Blocks.js, the Slant community recommends Blocks.js for most people. In the question“What are the best JavaScript libraries for building a UI?” Blocks.js is ranked 10th while CxJS is ranked 13th. The most important reason people chose Blocks.js is:
Blocks.js is just 16.5KB minified and gzipped. So it's pretty small.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro JSX Syntax
Pro Rich widget library
Pro Built-in charts
Pro Available in multiple visual themes
Pro Support included
github
email
slack
stack overflow
Pro Typescript support
Pro Formatting
date
number
url
prefix/suffix
custom formats
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 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.