How to create a rss feed of a page which is build with JavaScript?

We do hope to support such pages. The problem, however, is that to do it properly you’ll essentially having to load a browser on a server, load the page in the browser (so all its associated Javascript and CSS get loaded and executed), and then extract the resulting HTML. That’s far more resource-intensive, and slower, process than what we do at the moment. But we are thinking about ways we can support it, both in our hosted and self-hosted options.