ahoy.js | Simple , powerful JavaScript analytics | Analytics library

I have a Rails 6 app with Webpacker. Everything works well in development but I get an error trying to resolve the entry path when I try pushing to Heroku.

I have a third party gem, thredded, that tries to access jQuery when I require it in my application.js. When I load it in my application.js as seen below, I get an error.

I'm using the Ahoy (https://github.com/ankane/ahoy.js) gem for analytics. I'd like to calculate daily active users. The current SQL query that I have is based on the GroupDate documentation. Given the table ahoy_visits, which has columns started_at and user_id. It calculates the number of visits per day.

My website allows users to browse freely up to the point where they need to be signed in to continue using the service (hitting the "sign up" button and going through the registration process).

Once the users sign up, I want to redirect them to the last interesting page they were browsing : it might be the page just before clicking the sign-up button, or something more complex. For instance suppose the user browses a "core" content page, then goes to the "about_us" page, then tries to sign up, I'd rather redirect those users to the "core" content page.

I am wondering what's the best way to do that

• Hidden params in forms ? Sounds annoying to keep track of this parameter all along the form (and keep it when there are errors, etc.)
• Session-based information (some kind of "smart-referrer" url)
• Page visits (eg. using Ahoy.js)

And where/when to do this "tracking" of the last relevant page ? In the controller ? in the view as JS code ?

Any tips to do something like this ?