You could use something like Hotwired Turbo. Personally I'm not a huge fan, but it easily turns "traditional" web apps into SPA-like experiences. Under the hood

You could use something like Hotwired Turbo. Personally I'm not a huge fan, but it easily turns "traditional" web apps into SPA-like experiences. Under the hood, it does full page requests, but then calculates a diff and only renders parts of the page that have changed.