Particles & Physics

Firework Burst

Colorful glowing sparks burst radially, fall under gravity, and fade against a dark sky. Initial automatic launches stop after first input; canvas clicks create bursts that finish fading.

canvasmedium complexityintense motionclickmobile-ready

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

When to use it

Dark-theme hero backgrounds, celebration screens, loading states that benefit from festive ambient motion.

When not to

Light backgrounds (sky hardcoded near-black). Contexts where motion competes with readable content or users may have motion sensitivity.

Working with an AI agent

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

Change the hue palette to warm golds only by setting hues=[40,45,50,55,60], increase particle count per burst by changing n=28+(Math.random()*16|0) to n=50+(Math.random()*20|0).

Safe to edit

hue palette (hues array)
particle count per burst (n=28 base)
gravity strength (vy+=0.035)
fade speed (p.life-=0.014)
auto-launch interval (30+random*40)

Keep intact

visibilitychange pause/play guard
DPR-aware canvas sizing
particle cap check (parts.length<110)
reduced-motion guard (reduce flag)
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

Reduced-motion path fires a single static burst then stops — no ongoing animation, which may look broken rather than calm
Background color hardcoded in CSS (#06060f) — must edit to change from near-black
State remains local to each mounted instance; format/theme remount preserves takeover, not component values.

fireworksparticlescanvasphysicsgravityburstgenerative

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