Pointer Gestures
All functionality that uses multipoint or path-based gestures for operation can be operated with a single pointer without a path-based gesture, unless a multipoint or path-based gesture is essential.
In plain language
Anything you can do with a complex gesture (like a two-finger pinch or a swipe) must also be doable with a single, simple tap or click.
Why it matters
People with limited mobility, tremors, or who use a single-switch device or a mouse instead of a touchscreen often can't perform multi-finger gestures or precise swipes. If that's the only way to use a feature, they're locked out of it entirely.
In practice
Fails this criterion
An image carousel only advances when swiped horizontally, with no visible buttons to move between slides.
Meets this criterion
The same carousel can still be swiped, but also has visible "previous" and "next" buttons that work with a single tap or click.
Test it yourself
Try using the site's touch or gesture-based features (carousels, maps, zoom) with a single click or tap instead of a swipe or pinch. If there's no alternative way to do it, this criterion is failing.