You’re the one who got to this page, you tell us!
Seriously, though, this test helps people test all their different mouse buttons - even the more obscure ones.
Although it's pretty easy to test the right and left buttons (buttons 1 and 3) and the scroll wheel, it is sometimes difficult to find a way to test buttons number 2, 4 and 5 on a new mouse. That’s what we’re here for.
The buttons that this page will check are 1 (left mouse button) 2 (middle mouse button) 3 (right mouse button) 4 (side button) and 5 (side button).
On uncoventional mouse layouts these numbers sometimes correspond to different buttons than the ones we mention here.
Not yet, unfortunately. Some older browsers will not be able to record the "event" of some of the mouse clicks, and therefore only some of the buttons could be tested.
To test properly, use a modern browser like Chrome or Firefox (IE and Edge will not work 100% either).