Pointer tester

Start and focus the area for pointer/buttons/wheel/touch in relative CSS pixels. Wheel delta units are0 pixels,1 lines,2 pages. Blur, Esc, Tab, cancellation or1000 events stops and clears. This tests browser events, not physical hardware.

Input and results stay in this tab's memory. No upload, browser storage, analytics, logs, URL or history data. Clear, mode change or leaving removes them. Only language/theme/consent-choice preferences may be saved.