Hi, I searched for a few days and performed various tests but still am compelled to inquire with the group:

With regards to AJAX/PJAX usage in LS, what is the current status for the following?

• Is there no longer an option to choose to use or not use AJAX in multiscreen surveys? There used to be a slider for the setting or there was a value you could place in the theme options advanced text field. 
• Does it by default now use PJAX always? 
• What is the container (the unique selector in the DOM) used for PJAX to load the dynamic page-swapping contents? 
• Can the container be modified (Can we limit it to a different unique selector)?
• When performing an order-of-execution test, I placed various console.log scripts to attempt to find areas of the DOM that remain after clicking NEXT in a multiscreen survey. However I was never able to find a location that wasn't replaced. I'm hopeful that knowing some more about the above items, will help inform this item. My goal is to be able to have AJAX/PJAX replace content traversing deeper into the DOM vs replacing the entire page contents. 

Thanks for your help!

Current version of LS: Version 3.25.7+210113

AJAX/PJAX has been disabled - it caused far too many issues.

If we wanted to retain a value from question to question, what method does the community use? For example, if we had used AJAX, I would simply write to some JS vars outside of the container that AJAX would load the content into. I see we have the ability to use JS with each question if XSS is disabled but am trying to get around that as well as trying to find a solution without modifying any PHP files. Thanks for the update about AJAX/PJAX and appreciate any additional info.

One thing to note: I do see ajaxify and pjax still being loaded in my browser network inspector.

Thanks again!

Can't you use Expression Manager to carry the values through the survey?

I can utilize EM within a question's contents, inside of an equation type of question, and in the various sidebar validation/relevance fields. I believe I attempted to utilize it within the theme's code but had challenges (I will re-run a test and confirm).

For the current request from the client, the solution appears to be best if I can communicate between javascript and EM but I can't seem to perform that function without disabling XSS.

I can run some more tests in order to provide a more accurate definition of where the "walls" appear. And will try to spare you from the extraneous details of the end goal, but will also include that after I run some more tests. Thank you for you help.

Where are you placing the JS?

If it's in custom.js, no, there is no access to EM.

If it's in a theme TWIG file, you can access EM variables with {{ processString('{EM_Variable}') }}.

For example: