Mouse Drag Test

Test mouse drag stability, dropped holds, and pointer tracking accuracy directly in your browser before blaming the switch, surface, or sensor.

Checks

Drag stability

Best for

Dropped holds

Runs in

Browser

Mouse Drag Canvas

100%

Trail Legend

Pointer movement before drag
Press-and-drag trail

Move, hold, and drag inside the canvas

Points: 0

Drag strokes: 0

Zoom: 100%
Pan: (0, 0)
Ready
Hover / move passes
0
Press-and-drag passes
0

Usage Tips:

Move once without holding, then press and drag slowly and quickly. Broken dark-blue lines usually mean the browser lost the held-button state, while jagged paths point to tracking or surface problems.

Hold Shift while scrolling to pan the zoomed canvas horizontally.

All data stays in the browser. Use the canvas controls to zoom the view or clear the trail.

Overview

This page helps you check whether click-and-drag actions remain stable from start to finish. It is useful when dragged items drop unexpectedly, selection breaks mid-move, or the pointer path feels jittery.

How to use

1. Press and hold the primary mouse button. 2. Drag slowly across the page, then repeat with faster movement. 3. Watch for broken trails, sudden releases, or irregular path changes. 4. Compare the result on a different surface or after reconnecting the mouse.

Drag operation breaks unexpectedly?

If the pointer path looks smooth but the drag releases, focus on switch stability first. If the hold stays active but the trail jitters or jumps, the sensor or surface is more likely to blame.

- Track drag movement across a large interactive area. - Reveal dropped holds, stutter, and uneven pointer paths. - Compare short drags with long continuous movement. - Keep visible motion trails while repeating the same gesture.
The page relies on browser mouse events such as mousedown, mousemove, and mouseup. If the browser stops receiving the hold state, the trail will show a broken drag even when the pointer still moves.
- Diagnose a mouse that drops drag actions during file selection. - Compare tracking on a desk, mouse pad, or glass-like surface. - Check whether a wireless mouse becomes unstable under low battery. - Gather evidence before replacing a switch or returning the device.
Q: Why does dragging stop even though the pointer still moves? A: That usually points to an unstable switch hold state rather than a total sensor failure. Q: Can this detect sensor problems too? A: Yes. Uneven trails, jumps, or stutter can suggest sensor, surface, or interference issues. Q: Should I test fast and slow drags separately? A: Yes. Some problems appear only during fast motion, while others only show up during long holds. Q: Is any pointer data uploaded? A: No. Everything stays in your browser.

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