Smooth animations with Math.sin()

Remember geometry class? Well, I don't.

But I do know that when you're making a synthesizer, a sine wave produces a nice smooth sound.

And as it turns out, a sine wave has a smooth curve. So, you can use Math.sin() to animate smooth motions like so:

const domNode = document.querySelector('#waveEmoji')
function animate() {
  const a = Math.sin(Date.now() / speed) * range + offset;
  domNode.style = `transform: rotate(${a}deg);`;
  requestAnimationFrame(animate);
}
animate();