Thanks mate. Admittedly we don't typically test with those browser when we push changes. :|

Selenium is great for this. For this particular case, it won't access an element unless its visible, so you can validate that the scroll happens on button press. Easy to make a quick smoke test that can run in a few browsers

While this is a technically true statement Selenium is neither easy to setup nor easy to learn. It's documentation (of at least the libraries I've used, which were the recommended ones) was atrocious and not at all consistent.