Changes to “JS Check Options”

I like how you can set it to check and update the quantity every so often. However, from a usability standpoint, it can be annoying for the end-user. It checks on set intervals instead of trigger after certain actions. Initially it feels like the full time is waited, but if you try to adjust it again then it may revert back to the minimum quantity in a split second. I have tried to implement something like this using some custom JS, and I realize how tricky a situation it can be. Still, it would be nice to add a trigger such as:

Update every X seconds starting when <quantity box> gains focus. Reset the timer if additional input is made.