What to check
Move touches across the surface and look for dead zones, interrupted paths or unexpected jumps. Browser and OS gesture handling can reserve some edges.
Check multi-touch tracking and sweep the entire display for dead zones. The actual test runs full screen so every reachable part of the panel can be checked.
Mouse and trackpad input are intentionally ignored. Use the touchscreen itself.
A good test should not stop at a score. Use these practical checks to understand what the browser measured, what can affect the result, and what to change before your next call, stream or gaming session.
Move touches across the surface and look for dead zones, interrupted paths or unexpected jumps. Browser and OS gesture handling can reserve some edges.
A web test can expose obvious input problems but cannot recalibrate the digitiser or distinguish every driver fault from hardware failure.