∞ forever components

Drag & Reorder

Sortable Grid

3x3 grid of colored numbered tiles that spring-animate into position as tiles are dragged or swapped; initial idle shuffle stops after first input.

cssmedium complexitymoderate motionpointermobile-ready

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When to use it

Dashboard card reordering, settings panels, any UI where users need to manually sort a fixed set of items with tactile feedback.

When not to

Lists longer than ~12 items (spring loop scales linearly); contexts where ordering state must persist — this resets on page reload.

Working with an AI agent

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

Change the grid to 4 columns (set COLS=4, N=16, add 7 more PAL entries), increase spring stiffness by changing K from 0.14 to 0.22. 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

  • palette colors (PAL array)
  • grid size (N and COLS)
  • spring stiffness (K=0.14) and damping (D=0.74)
  • tile corner radius (border-radius:7px)
  • idle demo cadence while demoEnabled; first deliberate input disables it permanently
  • demo swap interval (1300ms)
  • theme tokens (:root dark defaults + [data-theme=light] overrides)

Keep intact

  • IIFE wrapper
  • visibilitychange stop/start guard
  • prefers-reduced-motion early return
  • pointer capture (setPointerCapture)
  • 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

  • Order is not persisted — resets on reload; wire localStorage or a backend to save state
  • Manual springs finish settling; requestAnimationFrame sleeps once stable.
  • Keyboard mode focuses the grid container, not individual tiles — screen-reader UX is minimal
  • State remains local to each mounted instance; format/theme remount preserves takeover, not component values.

dragreordergridspring-physicssortablekeyboardui-control

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