For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:javascript/openSUSE_Tumbleweed/devel:languages:javascript.repo
zypper refresh
zypper install jstime
For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:javascript/openSUSE_Factory_ARM/devel:languages:javascript.repo
zypper refresh
zypper install jstime
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:javascript/15.4/devel:languages:javascript.repo
zypper refresh
zypper install jstime