∞ forever components

Cursor & Pointer

Trail Comet

Hot-pink comet spring-follows the cursor, dragging a tapering additive trail that lengthens with speed and flings spark particles. Lissajous demo stops at first deliberate input.

canvasmedium complexitymoderate motionpointer

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When to use it

Dark-background hero sections, creative portfolios, cursor-effect showcases where a premium tactile feel is needed.

When not to

Light backgrounds (hardcoded dark fill). Forms or text-heavy layouts where a custom cursor competes with reading.

Working with an AI agent

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

Adjust the existing palette tokens and effect parameters while preserving manual control. Arrow keys steer; first click/touch stops the attract path permanently for this mount. Keep demo-v1 lifecycle marker, __foreverPreview.demoEnabled initialization and forever:interactive handler. Preserve reduced motion, visibility suspension and theme switching.

Safe to edit

  • comet color (rgba(255,92,168,...))
  • trail max length (MAX=110)
  • spring stiffness (k=0.22 real / 0.14 demo)
  • trail taper width multiplier (5.2)
  • speed-to-length scale factor (sp*4.2)
  • theme tokens (:root dark defaults + [data-theme=light] overrides)

Keep intact

  • DPR-aware canvas sizing + setTransform
  • visibilitychange pause/resume
  • reduced-motion still() fallback
  • IIFE wrapper
  • theme hook (?theme= bootstrap + forever:theme message listener + theme tokens)
  • sticky demo-v1 preview lifecycle; stop attract work, retain manual feedback and settling
  • pointer/touch takeover, keyboard access and visibility suspension
  • 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

  • Background hardcoded to #0a0a0f — change both CSS and ctx.fillStyle to use on light pages
  • Control state is local to each mount; format changes preserve preview takeover but create a fresh source instance.
  • State remains local to each mounted instance; format/theme remount preserves takeover, not component values.

comettrailspringcanvaspointeradditive-blendparticles

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