1. Why is the code minified? Are we supposed to take your word for it that it doesn't do anything fishy? What's the point of open sourcing it under MIT if source is not available?
2. <cd> is not a valid tagname. You could just use <pre> tag, that would fallback nicely if JS is disabled.
Docusaurus (by Facebook) is a free and awesome alternative, https://v2.docusaurus.io/
Docusaurus has all the same features as Smooth DOC as far as I can see, only you may need to install plugins to get them, eg. Algolia DocSearch