Mouse Test

No. Every counter, click, and drag stays in your browser's memory for the current page visit only. Nothing is sent anywhere, and refreshing the page clears everything.

Chatter, sometimes called a double-click bug, is when a worn-out microswitch registers a single physical click as two separate click events a few milliseconds apart. It's a common failure mode in older mice and shows up as things like a single click accidentally selecting and dragging, or a single click on a link opening it twice. The Double-Click & Chatter test flags any repeat click under 30 milliseconds as likely chatter, since no human can deliberately click that fast.

A deliberate double-click from a person typically lands somewhere between 100 and 400 milliseconds between the two clicks, and most operating systems accept anything up to around 500 milliseconds as a double-click. Chatter happens far faster than that, usually under 30 milliseconds, which is well below what a human hand can produce on purpose.

That's expected. Back and Forward correspond to the extra side buttons found on many gaming and productivity mice (button values 3 and 4 in the browser). If your mouse doesn't have them, those counters simply stay at zero, which isn't a problem with the test.

It's the average time between mousemove events the browser delivers while you're moving the cursor inside the Cursor Path box, converted to Hz. It's a reasonable estimate for comparing mice, but it isn't the same as the true USB polling rate a hardware tool would report, since the browser, operating system, and display refresh rate can all cap how often movement events actually arrive.

The Scroll Wheel Test box intentionally captures the wheel event and stops it from reaching the rest of the page, so you can scroll as much as you want to test the wheel without the page itself jumping around underneath the test.

Releasing the chip anywhere outside the dashed target zone counts as a failed drag, and the chip snaps back to its starting position so you can try again. It's meant to catch drag operations that get dropped partway through, which can happen with a mouse that loses its button-down state during movement.

Every session runs for 20 targets. A hit is a click directly on the target circle; a miss is any click inside the test box that lands outside the target. Accuracy is hits divided by total clicks (hits plus misses), and reaction time is measured from the moment a target appears to the moment you click it.

Most of it works with a trackpad, since trackpads generate the same click and scroll events as a mouse. Touchscreens are a different story: tests that depend on real mouse buttons, a scroll wheel, or hover-based movement, like the polling rate estimate, either won't register the same way or won't apply at all, so this tool is really built with a physical mouse in mind.