∞ forever components

UI Micro-interactions

Battery Charge Fill

Battery cycles amber-to-mint as a wobbling liquid level rises; segment ticks light in sequence, bubbles rise inside, and a bolt pulses at center.

canvasmedium complexitymoderate motionpointer

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When to use it

Status indicators for charging progress, IoT dashboards, energy/health app hero widgets.

When not to

Contexts where a real battery percentage must be displayed — the charge is animated/simulated, not data-driven.

Working with an AI agent

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

Change palette to red/orange by updating AMBER=[239,68,68], LIME=[234,179,8], MINT=[251,191,36], and increase TICKS to 8. 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

  • color palette (AMBER, LIME, MINT arrays)
  • tick count (TICKS=6)
  • wave amplitude (1.6+charge*1.4)
  • phase speed (0.0042)
  • bubble count (i<5)
  • battery size (58*u wide, 92*u tall)
  • theme tokens (:root dark defaults + [data-theme=light] overrides)

Keep intact

  • IIFE wrapper
  • prefers-reduced-motion guard (reduce variable)
  • visibilitychange stop/start pattern
  • DPR-aware canvas sizing
  • theme hook (?theme= bootstrap + forever:theme message listener + theme tokens)

Known limitations

  • Charge is purely animated (sine cycle) — no API to bind a real percentage
  • Bubble positions are deterministic seed-based, not truly random

batteryliquid-fillcanvasui-widgetcolor-shiftambientmicrointeraction

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