Wheel Picker

Purpose

A scrollable value picker with a fixed centre selection window — the familiar time/date picker interaction, built on native scroll-snap rather than a custom physics loop.

Use when

Choosing one value from a short, ordered set — hours, quantities, durations — where scrolling through options feels more natural than a dropdown or a row of buttons.

Avoid

• Long or unbounded option sets; scroll-snap stays legible for a few dozen items, not hundreds
• Multi-select — this is a single-value picker
• Free-form numeric entry where a native number input is more direct

Interaction

Momentum and inertia are the browser's own scroll-snap-type: y mandatory behaviour, not simulated physics — this is deliberate: the platform already does this correctly and consistently across touch and trackpad. A short debounce after scrolling settles reads the centred item and commits it.

Accessibility

role="listbox" with role="option" children and aria-selected on the current value. Arrow Up/Down move one item, Home/End jump to the ends — the picker is fully usable without a scroll gesture.

Reduced motion

Programmatic scrolling (keyboard selection, value changes) uses instant scroll rather than smooth scroll when motion is reduced; the centre selection window itself never animates.

Composition and anti-patterns

Don't wrap picker items in Jelly or Tilt — a wheel full of independently wobbling rows fights the platform-native scroll feel this component exists to preserve.