How to use this test
Choose an input to inspect
Use the left pad with the primary button or the right pad with the secondary button. A phone or trackpad tap can exercise the left pad, but does not test a physical mouse switch.
Make deliberate single clicks
Leave a clear pause between intended presses. Short intervals during this exercise may be worth investigating. If you deliberately double-click, short intervals are expected.
Compare timing and history
Each button has its own event count and interval statistics. Adjust the rapid-interval threshold from 50–500 milliseconds; existing history is recalculated. Reset before a new device or trial.
What we check
The test records pointer-down timestamps separately for the primary and secondary buttons. It keeps up to 200 events per pad. Each new event is compared with the previous event for that same pad, including time spent outside the pad.
An interval is flagged only when it is strictly shorter than your chosen threshold. This is our visible rule, not the operating system’s double-click setting or an electrical switch-debounce measurement. The local right-click menu is suppressed only inside the right pad.
What this test can’t tell you
Rapid browser events can be intentional. This page cannot see the physical switch or distinguish a deliberate double-click from an unintended repeat without your observation. It does not change your mouse or operating-system settings.
Something not working?
The right pad stays at zero
Use the secondary mouse button. A normal touch tap is not a right mouse button; a long press is often a browser gesture instead.
Many intervals are flagged
Check the threshold and your intended pace. Try slow single clicks, reset, then compare with another device or application.
The first click shows no interval
An interval needs two events. The count can be one while the timing values remain empty.
Common questions
Does a flagged interval prove a broken switch?
No. It marks a rapid pair according to your threshold. Repeated unintended pairs during deliberate single clicks provide a reason to investigate further.
Does this use the browser’s dblclick event?
No. It times individual pointer-down events so you can inspect the underlying event spacing. Operating-system double-click recognition is a separate rule.
Are left and right clicks combined?
No. They have independent histories, so alternating buttons does not create a false short interval between them.