Any working examples of Web IDE's Client Side Evaluation?

The documentation for Client Side Evaluation is pretty scant. I’m not entirely sure what’s meant to happen inside of the entry file. Should it be rendering a static site? Can I serve dynamic content?

Has anyone seen a working example of a repo that uses client side evaluation? All I’ve been able to locate is this Youtube video, but the repo featured doesn’t appear to be public.

I’m trying to activate this feature for this VuePress repo. Attempting to use the Web IDE’s preview feature fails due to packaging errors in both Firefox and Chrome.