replacement for lang/phantomjs [deprecated]

[Miroslav Lachman]

The port lang/phantomjs is marked as deprecated / expired 2019-05-15. Is 
there any alternative in the ports tree? I searched the net and found 
https://slimerjs.org but it is not in the ports tree. (I don't have a 
skill to port it and maintain it myself)

One of my clients is using phantomjs thru some webapplication so I need 
to find some replacement.

Kind regards
Miroslav Lachman