• Success Criterion 2.5.4
  • Conformance level A

Wave-to-Advance Camera Gesture With No Button Alternative

2.5.4 — Motion Actuation

Scenario

Setting

A ticket marketplace's seat-selection map

What’s wrong

Camera-gesture (wave to advance) features lacking button equivalents or disable toggle.

Example

Picture a ticket marketplace's seat-selection map: camera-gesture (wave to advance) features lacking button equivalents or disable toggle.

Why it matters

People with tremor and people whose device cannot be moved freely. On a ticket marketplace's seat-selection map, this barrier means they can't complete the task using a keyboard alone.

How to test

Try to advance the feature via a button instead of a camera-detected wave gesture: if no button equivalent or disable toggle exists, it fails.

How to fix

A conventional on-screen control must duplicate the motion-triggered feature, and motion input must be able to be turned off.

Outcome

Corrected, a ticket marketplace's seat-selection map now lets a visitor reach and operate the control without a mouse.

Who is affected

People with tremor and people whose device cannot be moved freely.

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