Hello Yaser,
Sorry, for the delay. You used the wrong email and your message was moved to the SPAM folder, that’s why we didn’t know that you submitted a support request.
I’ve already sent you the answer but will include it here.
We don’t have an NPM package with the Pro version. But you can install Gantt as an NPM package the following way:
Unpack Gantt to a specific folder, for example, to /opt/gantt_pro