Pulse Loop

export function pulseLoop(el) {
  if (window.matchMedia('(prefers-reduced-motion: reduce)').matches) return () => {}

  el.style.display = 'inline-block'
  const easing = 'linear(0.0000,0.0016,0.0065,0.0145,0.0257,0.0400,0.0573,0.0774,0.1003,0.1257,0.1536,0.1838,0.2160,0.2500,0.2857,0.3227,0.3609,0.4000,0.4397,0.4799,0.5201,0.5603,0.6000,0.6391,0.6773,0.7143,0.7500,0.7840,0.8162,0.8464,0.8743,0.8997,0.9226,0.9427,0.9600,0.9743,0.9855,0.9935,0.9984,1.0000)'
  const anim = el.animate(
    [
      { transform: 'none', opacity: 1 },
      { transform: 'scale(1.08)', opacity: 0.85 },
    ],
    {
      duration: 0.8 * 1000,
      delay: 0 * 1000,
      easing,
      iterations: Infinity,
      direction: 'alternate',
      fill: 'backwards',
    },
  )
  return () => {
    anim.cancel()
    el.style.display = ''
  }
}