offset-rotate

The offset-rotate CSS property defines the orientation/direction of the element as it is positioned along the {{cssxref("offset-path")}}.

css

offset-rotate: auto;

css

offset-rotate: 90deg;

css

offset-rotate: auto 90deg;

css

offset-rotate: reverse;

html

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

css

#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%;
  }
}

/* Provides a reference image of what path the element is following */
#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="http://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>');
}

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 = "Play";
  } else {
    example.classList.add("running");
    button.textContent = "Pause";
  }
});

[!NOTE] Early versions of the spec called this property motion-rotation.

Syntax

css

/* Follow the path direction, with optional additional angle */
offset-rotate: auto;
offset-rotate: auto 45deg;

/* Follow the path direction but facing the opposite direction of `auto` */
offset-rotate: reverse;

/* Keep a constant rotation regardless the position on the path */
offset-rotate: 90deg;
offset-rotate: 0.5turn;

/* Global values */
offset-rotate: inherit;
offset-rotate: initial;
offset-rotate: revert;
offset-rotate: revert-layer;
offset-rotate: unset;

auto
- : The element is rotated by the angle of the direction of the {{cssxref("offset-path")}}, relative to the positive x-axis. This is the default value.
{{cssxref("angle")}}
- : The element has a constant clockwise rotation transformation applied to it by the specified rotation angle.
auto <angle>
- : If auto is followed by an {{cssxref("angle")}}, the computed value of the angle is added to the computed value of auto.
reverse
- : The element is rotated similar to auto, except it faces the opposite direction. It is the same as specifying a value of auto 180deg.

Formal definition

Formal syntax

Examples

Setting element orientation along its offset path

HTML

html

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

CSS

css

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%;
  }
}

Result

{{EmbedLiveSample('Setting_element_orientation_along_its_offset_path', '100%', '200')}}