Gravity Balls

HTML

CSS

JS

const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
let balls = [];
class Ball {
  constructor(x, y) {
    this.x = x;
    this.y = y;
    this.radius = 15 + Math.random() * 10;
    this.color = `hsl(${Math.random() * 360}, 70%, 60%)`;
    this.dy = 0;
    this.gravity = 0.5;
    this.bounce = 0.7;
  }
  update() {
    this.dy += this.gravity;
    this.y += this.dy;
    if (this.y + this.radius > canvas.height) {
      this.y = canvas.height - this.radius;
      this.dy *= -this.bounce;
    }
    this.draw();
  }
  draw() {
    ctx.beginPath();
    ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2);
    ctx.fillStyle = this.color;
    ctx.fill();
  }
}
canvas.addEventListener("click", (e) => {
  balls.push(new Ball(e.clientX, e.clientY));
});
function animate() {
  ctx.clearRect(0, 0, canvas.width, canvas.height);
  balls.forEach(ball => ball.update());
  requestAnimationFrame(animate);
}
animate();

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