animation-play-state

animation-play-state: paused;

animation-play-state: running;

<section class="flex-column" id="default-example">
  <div class="animating" id="example-element"></div>
</section>

#example-element {
  background-color: #1766aa;
  color: white;
  margin: auto;
  margin-left: 0;
  border: 5px solid #333;
  width: 150px;
  height: 150px;
  border-radius: 50%;
}
.animating {
  animation-name: slide;
  animation-duration: 3s;
  animation-timing-function: ease-in;
  animation-iteration-count: infinite;
  animation-direction: alternate;
}
@keyframes slide {
  from {
    background-color: orange;
    color: black;
    margin-left: 0;
  }
  to {
    background-color: orange;
    color: black;
    margin-left: 80%;
  }
}

/* 単一のアニメーション */
animation-play-state: running;
animation-play-state: paused;
/* 複数のアニメーション */
animation-play-state: paused, running, running;
/* グローバル値 */
animation-play-state: inherit;
animation-play-state: initial;
animation-play-state: revert;
animation-play-state: revert-layer;
animation-play-state: unset;

<div class="box"></div>

.box {
  background-color: rebeccapurple;
  border-radius: 10px;
  width: 100px;
  height: 100px;
  animation-name: rotate;
  animation-duration: 0.7s;
  animation-iteration-count: infinite;
  animation-play-state: paused;
}
.box:hover {
  animation-play-state: running;
}
@keyframes rotate {
  0% {
    transform: rotate(0);
  }
  100% {
    transform: rotate(360deg);
  }
}