60 FPS Particle Explosions in 10 Lines of Vanilla JS (+ The Exact AI Prompt)

Game feel lives and dies by visual juice, yet developers constantly overcomplicate particle systems with bloated third-party dependencies. With ten lines of lean, garbage-collection-friendly Canvas code, you can generate a buttery-smooth 60 FPS explosion that elevates any web arcade prototype instantly.

const ctx = document.body.appendChild(document.createElement('canvas')).getContext('2d');
const pts = Array.from({length: 60}, () => ({x: 150, y: 150, vx: (Math.random()-.5)*8, vy: (Math.random()-.5)*8, a: 1}));
function loop() {
  ctx.fillStyle = 'rgba(0,0,0,0.25)'; ctx.fillRect(0, 0, 300, 300);
  pts.forEach(p => {
    ctx.fillStyle = `rgba(255,80,0,${p.a -= 0.015})`;
    ctx.fillRect(p.x += p.vx, p.y += (p.vy += 0.1), 3, 3);
  });
  if (pts[0].a > 0) requestAnimationFrame(loop);
} loop();

• Free Motion Blur: Instead of calling ctx.clearRect(), drawing a semi-transparent background (rgba(0,0,0,0.25)) creates natural decay trails with zero post-processing overhead.
• Inlined Physics Step: Updating gravity (p.vy += 0.1) and position inside fillRect arguments bypasses redundant iteration cycles, saving precious CPU frame budget.
• The 1-Shot AI Prompt: Need variations fast? Prompt your LLM with: "Write an ultra-minimal, 10-line Vanilla JS HTML5 canvas particle explosion. Use radial velocity offsets, in-place alpha decay, gravity, and persistent trail clearing without external libraries."

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