Looking at https://launchpad.net/ubuntu/+source/jscoverage/+publishinghistory and https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=747401 it seems like the project was abandoned upstream and then removed from Debian, and in turn Ubuntu.
** Bug watch added: Debian Bug tracker #747401 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=747401 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1788836 Title: jscoverage package is missed in 16.04 LTS and 18.04 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/jscoverage/+bug/1788836/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
