In plain English
Lots of people use more than one input at once: a keyboard attached to a touchscreen tablet, a stylus alongside their fingers, a switch device with a mouse. This AAA rule says your store must not lock people into one input method. If it detects a touchscreen, it should not then ignore the keyboard or mouse.
This is almost never done on purpose. It usually creeps in when a component listens only for touch events, or a script assumes “touch device, so no keyboard.”
Who this is for
- People who combine inputs, including many assistive-tech users pairing a specialised device with a mainstream one.
How to check and fix it yourself
On a touchscreen laptop (or a tablet with a keyboard), try operating your store with touch, then the keyboard, then the trackpad, without reloading. All should keep working together.
Touchscreen laptop: tap, then use keyboard, then trackpad, all live. ✓
Site disables keyboard once a touch is detected. ✗Where we can help
We test whether your store honours multiple input methods at once or silently drops one after detecting another. It is a subtle failure that only shows up on hybrid devices, exactly the kind of thing a manual review catches.