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function animate() {
const bg = document.querySelector("#bg");
for (const star of bg.children) {
star.x += star.vx;
star.y += star.vy;
star.style.left = `${star.x}px`;
star.style.top = `${star.y}px`;
}
requestAnimationFrame(animate);
}
document.addEventListener("DOMContentLoaded", () => {
const bg = document.createElement("div");
bg.setAttribute("id", "bg");
const numStars = Math.floor((window.innerWidth * window.innerHeight)/10_000);
for (let i = 0; i < numStars; i++) {
const star = document.createElement("div");
star.classList.add("star");
star.x = Math.random() * window.innerWidth;
star.y = Math.random() * window.innerHeight;
star.vx = (Math.random() - 0.5) * 0.2;
star.vy = (Math.random() - 0.5) * 0.2;
star.style.left = `${star.x}px`;
star.style.top = `${star.y}px`;
bg.appendChild(star);
}
document.body.prepend(bg);
var styleBlock = document.createElement("style");
styleBlock.textContent = `
#bg {
position: fixed;
inset: 0;
pointer-events: none;
z-index: 0;
}
.star {
position: absolute;
width: 3px;
height: 3px;
border-radius: 50%;
background: #e6e6e6;
box-shadow: 0 0 4px white;
}
`;
document.head.append(styleBlock);
requestAnimationFrame(animate);
})
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