For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:MihailJP/openSUSE_Tumbleweed/home:MihailJP.repo
zypper refresh
zypper install zsh-syntax-highlighting
For openSUSE Leap 15.2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:MihailJP/openSUSE_Leap_15.2/home:MihailJP.repo
zypper refresh
zypper install zsh-syntax-highlighting
For openSUSE Leap 15.1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:MihailJP/openSUSE_Leap_15.1/home:MihailJP.repo
zypper refresh
zypper install zsh-syntax-highlighting
For openSUSE Leap 15.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:MihailJP/openSUSE_Leap_15.0/home:MihailJP.repo
zypper refresh
zypper install zsh-syntax-highlighting
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:MihailJP/openSUSE_Factory/home:MihailJP.repo
zypper refresh
zypper install zsh-syntax-highlighting
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:MihailJP/15.6/home:MihailJP.repo
zypper refresh
zypper install zsh-syntax-highlighting
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:MihailJP/15.5/home:MihailJP.repo
zypper refresh
zypper install zsh-syntax-highlighting
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:MihailJP/15.4/home:MihailJP.repo
zypper refresh
zypper install zsh-syntax-highlighting
For 15.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:MihailJP/15.3/home:MihailJP.repo
zypper refresh
zypper install zsh-syntax-highlighting