∞ forever components

Drag & Reorder

Carousel Throw

Seven colored cards orbit a glowing hub in a radial ring; drag to fling with angular inertia, release to snap to the nearest card under the marker.

cssmedium complexitymoderate motionpointermobile-ready

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1

When to use it

Card pickers, radial menus, or onboarding flows needing a tactile selection carousel with satisfying throw-and-snap physics.

When not to

Lists with more than ~9 items where radial layout crowds cards. Contexts needing immediate stable selection without motion.

Working with an AI agent

Every component ships agent-ready metadata. An example instruction for this one:

Change card count to 5 by setting N=5 and trimming PAL to 5 entries, then increase orbit radius to 42 by setting R=42. Theme: dark tokens live in :root, the light variant in :root[data-theme="light"]; ?theme=light or a {type:'forever:theme'} postMessage switches at runtime.

Safe to edit

  • card count (N=7)
  • orbit radius in % (R=37)
  • color palette (PAL array)
  • spring stiffness (diff*0.10) and damping (vel*0.74)
  • fling velocity scale (STEP*0.42 in keydown)
  • auto-demo idle threshold (idle>150)
  • theme tokens (:root dark defaults + [data-theme=light] overrides)

Keep intact

  • IIFE wrapper
  • visibilitychange pause/resume
  • prefers-reduced-motion early-exit guard
  • counterRotate() keeping glyphs upright during ring spin
  • theme hook (?theme= bootstrap + forever:theme message listener + theme tokens)
  • demo-v1 preview lifecycle: initialize demoEnabled from window.__foreverPreview and stop attract work on the window forever:interactive event; retain manual feedback, settling, cleanup and explicit sessions

Known limitations

  • Cards counter-rotate to stay upright — removing counterRotate() will spin the labels with the ring
  • Angular drag uses pointer angle from center; very small ring sizes reduce drag precision
  • Auto-demo fires after idle timeout — remove the demoT/idle block before shipping in production
  • State remains local to each mounted instance; format/theme remount preserves takeover, not component values.

carouseldraginertiaradialphysicssnapui-control

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