The official github repo is probably a better link: <a href="https://github.com/alibaba/rax" rel="nofollow">https://github.com/alibaba/rax</a>
The example index.html page contains a link to framework.web.js which is 167k. Minified and gzipped this reduces to 17k so not 8k, as advertised, but the same size as Vue.js .