jarv.is/assets/sass/components/_animation.scss

@use "../abstracts/themes";

.wave,
.beat {
  display: inline-block;
}

.wave {
  animation: wave 5s infinite;
  animation-delay: 1s;
  transform-origin: 65% 80%;
}

.beat {
  animation: beat 10s infinite; // 6 bpm, call 911 if you see this please.
  animation-delay: 7.5s; // offset from wave animation
}

@keyframes wave {
  // stylelint-disable rule-empty-line-before
  0% {
    transform: rotate(0deg);
  }
  5% {
    transform: rotate(14deg);
  }
  10% {
    transform: rotate(-8deg);
  }
  15% {
    transform: rotate(14deg);
  }
  20% {
    transform: rotate(-4deg);
  }
  25% {
    transform: rotate(10deg);
  }
  30% {
    transform: rotate(0deg);
  }
  // stylelint-enable rule-empty-line-before

  // pause for 3.5 out of 5 seconds
  100% {
    transform: rotate(0deg);
  }
}

@keyframes beat {
  // stylelint-disable rule-empty-line-before
  0% {
    transform: scale(1);
  }
  2% {
    transform: scale(1.25);
  }
  4% {
    transform: scale(1);
  }
  6% {
    transform: scale(1.2);
  }
  8% {
    transform: scale(1);
  }
  // stylelint-enable rule-empty-line-before

  // pause for ~9 out of 10 seconds
  100% {
    transform: scale(1);
  }
}

// modified from https://tobiasahlin.com/spinkit/
@keyframes loading {
  // stylelint-disable rule-empty-line-before
  0%,
  80%,
  100% {
    transform: scale(0);
  }
  40% {
    transform: scale(0.6);
  }
  // stylelint-enable rule-empty-line-before
}

// https://web.dev/prefers-reduced-motion/#(bonus)-forcing-reduced-motion-on-all-websites
@media (prefers-reduced-motion: reduce) {
  *,
  ::before,
  ::after {
    animation-delay: -1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0s !important;
    transition-delay: 0s !important;
  }
}