Scroll Wheel Check

Run a guided browser-visible scroll test to see whether wheel input stays consistent, reverses unexpectedly, or keeps firing after you stop scrolling.

Guided workflow

Slow, fast, then idle

Best for

Jump / Reverse

Runs in

Browser

Result summary

A compact view of the current test state and the strongest signal detected so far.

Inconclusive

Samples captured

0

Suspicious reverse events

0

Idle-period events

0

Enough data

No

Complete all three steps and collect at least 4 slow samples plus 8 fast samples before trusting the result.

Guided abnormal-input check

Use one direction only for each step so the page can count suspicious reversals instead of normal back-and-forth scrolling.

1. Slow scrolling

Collecting

Roll the wheel gently in one direction several times.

2. Fast flicks

Collecting

Now flick the wheel faster in that same direction.

3. Hands off for 5 seconds

Collecting

Stop touching the wheel and wait for the idle timer to finish.

3. Hands off for 5 seconds

Do not touch the wheel during this countdown. Any new wheel event is counted as suspicious idle leakage.

5s remaining in idle check

Raw wheel event view

The wheel-only test area below is still useful when you want to inspect the exact browser events and recent history by hand.

Wheel Status Monitor

Not Triggered
Activated
Triggered

Mouse Detection Area

Move mouse into this area for mouse function detection

Scroll History Records

No scroll records

Start scrolling mouse wheel to view records

What this page does

This page focuses on browser-visible wheel behavior. It does not guess hardware failure from one number. Instead, it compares slow turns, fast flicks, and a short idle period to highlight suspicious reversals or events that keep firing after your hand leaves the wheel.

What it cannot guarantee

The browser cannot see the physical wheel encoder directly. Touchpads, vendor software, scroll acceleration, and app-specific smoothing can all change event patterns. Treat abnormal results as evidence to investigate, not as a final hardware verdict.

Reverse bursts or ghost wheel events?

If slow one-direction scrolling already triggers reversals, check for dirt or wear in the wheel encoder first. If the issue appears only during fast flicks, compare drivers, browser smoothing, and USB polling behavior before replacing the mouse.

One isolated reversal can happen during very uneven motion, especially on touchpads. Multiple quick direction flips during one-direction scrolling, or extra events during the idle window, are more suspicious. Compare browsers and USB ports before deciding the mouse is faulty.
The guided box listens for browser wheel events and inspects the dominant delta on each event. It counts fast direction flips and any wheel events that occur during the 5-second idle phase.
Q: Why do I have to stay in one direction? A: Because the page is looking for unexpected reverse bursts, not normal back-and-forth scrolling. Q: Can this test a touchpad too? A: Yes, if the touchpad exposes wheel-like events to the browser. Q: Does this upload my wheel data? A: No. The guided check and raw log both run locally in your browser.

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