InputChecks: A Browser Test Bench for Misbehaving Mice and Keyboards

Field notes

The suite establishes a baseline from the user’s first scroll, then compares subsequent browser events against that direction. Its visible readout includes reverse-event percentage, longest pause, and event rate, while a green-and-red signal graph makes intermittent reversals easier to spot. The page explicitly limits its diagnosis to input received by the browser rather than physical wheel notches or confirmed hardware failure. Additional categories for controllers, multimedia devices, and displays are listed but marked as coming soon.