Star Trails Animation

1,901 ledoc

Open In Editor Publish Your Code

Star Trails Animation

Recommended

12 October 2025

CSS Loading Animation HTML Structure

26 September 2025

CSS Loading Animation with Background Image

18 August 2024

Interactive Title Animation

HTML

CSS

JS

let x1=0, y1=0;
window.client
const 
  vh = Math.max(document.documentElement.clientHeight || 0, window.innerHeight || 0),
  dist_to_draw = 50,
  delay = 1000,
  fsize = [
    '1.1rem', '1.4rem', '.8rem', '1.7rem'
  ],
  colors = [
  '#E23636',
  '#F9F3EE',
  '#E1F8DC',
  '#B8AFE6',
  '#AEE1CD',
  '#5EB0E5'
],
  rand = (min, max) => 
    Math.floor(Math.random() * (max - min + 1)) + min,
  selRand = (o) => o[rand(0, o.length -1)],
  distanceTo =  (x1, y1, x2, y2) => 
    Math.sqrt((Math.pow(x2-x1,2))+(Math.pow(y2-y1,2))),
  shouldDraw = (x, y) => 
    (distanceTo(x1, y1, x, y) >= dist_to_draw),
  addStr = (x, y) => {
    const str = document.createElement("div");
    str.innerHTML = '&#10022;';
    str.className = 'star';
    str.style.top = `${y + rand(-20,20)}px`;
    str.style.left = `${x}px`;
    str.style.color = selRand(colors);
    str.style.fontSize = selRand(fsize);
    document.body.appendChild(str);
 
    const fs = 10 + 5 * parseFloat(getComputedStyle(str).fontSize);
    
    str.animate({
      translate: `0 ${(y+fs)>vh?vh-y:fs}px`,
      opacity: 0,
      transform: `rotateX(${rand(1, 500)}deg) rotateY(${rand(1, 500)}deg)`
    }, {
      duration: delay,
      fill: 'forwards',

});
   
    setTimeout(() => {
        str.remove();
      }, delay);
  }

addEventListener("mousemove", (e) => {
  const {clientX, clientY} = e;
  if(shouldDraw(clientX, clientY)){
    addStr(clientX, clientY);
    x1 = clientX;
    y1 = clientY;
  }
});