My client's SiteFinity administration site has the ability to add DigitalConfig variables. Unless I'm mistaken, these are built into the SiteFinity framework.
I know we are accessing them through an MVC call somehow in a company-native project, but I need to check a boolean flag from these variables on a SiteFinity content page. Is there any way of doing so in a javascript block on the page, or does this sound like something beyond SiteFinity that's been added?
I assume you are talking about Config settings that can be accessed from Administration > Settings > Advanced in the backend.
You will need to know the exact setting you are looking for and then you can get its value using the API (https://www.progress.com/documentation/sitefinity-cms/administration-settings-and-configurations)
So, to access a config setting in javascript in your mvc view, you can do something like this: