Motion Actuation

Requirements

• An alternative that does not require device motion is available.

Full Explanation

2.5.4 Motion Actuation (Level A) (WCAG 2.1 requirement)

User interface components can also operate functionality based on device or user motion. However, the ability to respond to the motion can be disabled to prevent accidental actuation, except when:

Supported Interface

The motion is used to operate functionality through an accessibility-supported interface;

Essential

The motion is essential for the function and doing so would invalidate the activity.

Particularly on portable (mobile/ tablet) devices, web content can react to motion (with functionality such as “shake to undo” or by using the tilt of the device as a directional input). This criterion ensures that an alternative that does not require device motion is available.