Check whether your mouse can hold a click steadily and drag smoothly, without unwanted releases. This helps spot "double-click" button chatter and worn-out switches that break drag-and-drop.
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How This Test Works
Two quick tests check different parts of your left mouse button's behavior.
Press & Hold Test: Press and hold the left mouse button inside the box for at least 3 seconds without letting go, then release.
We watch for any moment your button registers a "release" and an immediate "press" again while you were still physically holding it down — a sign of button chatter.
Drag & Drop Test: Click and hold the blue block, drag it into the dashed target box, then release the button.
If the block drops before reaching the target, or the click releases mid-drag, that points to the same underlying issue — a mouse button that can't hold a steady click.
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Press & Hold Test
Press and hold the left mouse button in the box below for at least 3 seconds, then release.
Press and hold here
0.0s
Hold for at least 3 seconds
Longest continuous hold
–
Unexpected releases detected
0
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Drag & Drop Test
Click and hold the blue block, drag it fully into the dashed target zone, then release.
DRAG ME
DROP HERE
Drag attempts
0
Successful drops
0
Dropped early (missed)
0
Why this matters: Over time, the micro-switch under a mouse button can wear out, causing it to briefly "let go" during a single physical press — even though your finger never lifted. This shows up as accidental double-clicks, files or text getting dropped mid-drag, or dragged windows snapping back unexpectedly. If this test repeatedly detects unexpected releases or missed drags, your mouse button switch may need attention or replacement.