WebExpress | Web browser in C # and WPF

I am programming a node.js webexpress server that uses pug (jade) to create a website for viewing (revit) files uploaded to autodesk forge.

The webserver uses axios to communicate with forge and allows for logging in, creating and opening a bucket, uploading files and to get the URN for projects that were uploaded to the bucket.

When it comes to setting up the viewer I have examples that use viewerapp being set up locally in the browser. I am however using pug to create the pages and this does not seem to allow for keeping the page with the viewer alive in the browser and only updating it. Otherwise every mouseclick in the browser window would set up a new viewer, which seems both slow and overkill.

The socket library appears to allow for two way communication between webserver and browser but that's a whole new library to learn that I rather would not include if not necessary.

So the first question is if it is even possible to use node.js webexpress and pug to dynamically create a webpage with the forge viewer in it, and buttons that allow for changing views without resending the entire page including setting up the viewer again.

And if so, is there a simpler way to do so than relying on the socket library?

I can of course put all the viewer logic in a javascript file that gets loaded with the page, but I rather not do so if not necessary, as that would expose too much of the javascript and the connection to forge to the end user. I would prefer it if this can be kept on the webserver instead.

I have looked at https://learnforge.autodesk.io/#/viewer/2legged/nodejs and other sample code but this does not seem to answer my question in that the viewer seems to be created and maintained in the browser, not by the node.js webserver.