Comment by syncsynchalt

wget will do what you want, with the right flags. Try `wget -r https://ciechanow.ski/mechanical-watch/ --include-directories=js/`, the resulting `ciechanow.ski/js/` dir should have it.

Adjust the flags as necessary to crawl more of the site if needed (omitting `--include-directories` without an `-l {limit}` flag will eventually crawl the whole site, please be kinder to their bandwidth than that).