How do things like these cope with client-side render websites?

Man, do I miss back when you could “save as webpage, complete” and generally get a working copy. I saved webpages a lot because after all, you might not always be online in those days!

HTTrack - a name I hadn't heard in 15 years may be. I used it back then. However, I want to clarify that the thing I set out to build is not about entire site backup, but more of site URL and some metadata, but with local-first approach and self-hostable.