offset-rotate

offset-rotate: auto;

offset-rotate: 90deg;

offset-rotate: auto 90deg;

offset-rotate: reverse;

<section class="default-example" id="default-example">
  <div class="transition-all" id="example-element"></div>
  <button id="playback" type="button">再生</button>
</section>

#example-element {
  width: 24px;
  height: 24px;
  background: #2bc4a2;
  offset-path: path("M-70,-40 C-70,70 70,70 70,-40");
  animation: distance 8000ms infinite linear;
  animation-play-state: paused;
  clip-path: polygon(0% 0%, 70% 0%, 100% 50%, 70% 100%, 0% 100%, 30% 50%);
}
#example-element.running {
  animation-play-state: running;
}
#playback {
  position: absolute;
  top: 0;
  left: 0;
  font-size: 1em;
}
@keyframes distance {
  0% {
    offset-distance: 0%;
  }
  100% {
    offset-distance: 100%;
  }
}
/* 要素が従うパスを参照する画像を提供する */
#default-example {
  position: relative;
  background-position: calc(50% - 12px) calc(50% + 14px);
  background-repeat: no-repeat;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="https://www.w3.org/2000/svg" viewBox="-75 -45 150 140" width="150" height="140"><path d="M-70,-40 C-70,70 70,70 70,-40" fill="none" stroke="lightgrey" stroke-width="2" stroke-dasharray="4.5"/></svg>');
}

window.addEventListener("load", () => {
  const example = document.getElementById("example-element");
  const button = document.getElementById("playback");
  button.addEventListener("click", () => {
    if (example.classList.contains("running")) {
      example.classList.remove("running");
      button.textContent = "再生";
    } else {
      example.classList.add("running");
      button.textContent = "停止";
    }
  });
});

/* パスの方向に従い、任意で角度を追加 */
offset-rotate: auto;
offset-rotate: auto 45deg;
/* パスの方向に従うが、 auto とは逆の方向を向く */
offset-rotate: reverse;
/* パスの位置に関係なく、決められた回転を維持する */
offset-rotate: 90deg;
offset-rotate: 0.5turn;
/* グローバル値 */
offset-rotate: inherit;
offset-rotate: initial;
offset-rotate: revert;
offset-rotate: revert-layer;
offset-rotate: unset;

<div></div>
<div></div>
<div></div>

div {
  width: 40px;
  height: 40px;
  background: #2bc4a2;
  margin: 20px;
  clip-path: polygon(0% 0%, 70% 0%, 100% 50%, 70% 100%, 0% 100%, 30% 50%);
  animation: move 5000ms infinite alternate ease-in-out;
  offset-path: path("M20,20 C20,50 180,-10 180,20");
}
div:nth-child(1) {
  offset-rotate: auto;
}
div:nth-child(2) {
  offset-rotate: auto 90deg;
}
div:nth-child(3) {
  offset-rotate: 30deg;
}
@keyframes move {
  100% {
    offset-distance: 100%;
  }
}