∞ forever components

Inputs & Switches

Crown Dial

Cream drum dial with engraved tick bars scrolling as it rotates; a milled crown wheel ratchets on drag or click. Numeric readout below.

canvasmedium complexitymoderate motionpointermobile-ready

Open on the canvas to copy the code → Free account · 3 copies a day · membership goes unlimited

Live demo — the real component, running in a sandbox. One self-contained HTML file, zero dependencies. Open it on the canvas →
1

When to use it

Precision numeric inputs with a tactile, mechanical aesthetic. Retro instrument panels, settings UIs, watch-themed interfaces.

When not to

Touch-only mobile where drag conflicts with scroll. Fast data-entry forms where keyboard input is expected.

Working with an AI agent

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

Change TEETH=24 and the ratchet STEP together, adjust --cd-acc and --cd-bg for the cream watch palette, or tune spring interpolation .22. Auto-ratchets run only while demoEnabled; first input disables them permanently. Preserve pointer and arrow-key input plus the forever:theme message hook.

Safe to edit

  • tooth count (TEETH=24)
  • spring friction (0.22 lerp factor)
  • accent and paper tokens (--cd-acc, --cd-bg)
  • drum size (R*0.30)
  • auto-ratchet interval (140+random*120)
  • crown knurling count (KN=18)
  • theme tokens (:root dark defaults + [data-theme=light] overrides)

Keep intact

  • IIFE wrapper
  • prefers-reduced-motion guard and static fallback
  • visibilitychange stop/start
  • DPR-aware canvas sizing
  • 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

  • Pointer drag threshold (14px) may fire multiple ratchets per swipe on high-DPI trackpads
  • Ratchet state is local and resets on reload; pointer and arrow-key input remain active after takeover.
  • State remains local to each mounted instance; format/theme remount preserves takeover, not component values.

dialwatchknobcanvasratchetmechanicalpointer

More Inputs & Switches components

  • Liquid ToggleSVG liquid toggle with a goo filter, trailing droplets and a native button. First deliberate input stops the idle demo; the chosen on/off state settles fully.
  • Glow SliderSVG range slider with a muted plum-to-teal fill, glow and value bubble, driven by a native range input. First input stops demo oscillation; drag and…
  • Spring StepperMint stepper with native minus/plus buttons and a number reel that settles with spring feedback. First deliberate input stops automatic steps; the chosen…
  • Segmented ControlSlate-to-sage pill slides between four native segment buttons with elastic spring stretch. First input stops automatic cycling; committed selection remains.
  • Checkbox MorphThree native amber checkbox buttons animate their check strokes and expose pressed state. First input stops the demo; checked values remain.
  • Star RatingFive gold SVG star radio controls commit ratings on click or keyboard input and settle with a scale bounce. First input stops automatic sweeping.