Server side include?

[sbwaters]

Is it possible to do a server side include (SSI) with pagePark or would one build the html of the envelope and tuck the contents inside a .js file and serve that?

Do you have a pointer to documentation, a better way, or to someone else who has addressed the issue? Thnx.

P.S. I can apparently make due inserting a .js script in each page. [See: https://www.w3schools.com/howto/howto_html_include.asp] which I will do but with many pages, it is a bit cumbersome. /Regards