The offset CSS shorthand property sets all the properties required for animating an element along a defined path.
Note: Early versions of the spec called this property motion.
Constituent properties
This property is a shorthand for the following CSS properties:
Syntax
/* Offset position */
offset: auto;
offset: 10px 30px;
offset: none;
/* Offset path */
offset: ray(45deg closest-side);
offset: path("M 100 100 L 300 100 L 200 300 z");
offset: url(arc.svg);
/* Offset path with distance and/or rotation */
offset: url(circle.svg) 100px;
offset: url(circle.svg) 40%;
offset: url(circle.svg) 30deg;
offset: url(circle.svg) 50px 20deg;
/* Including offset anchor */
offset: ray(45deg closest-side) / 40px 20px;
offset: url(arc.svg) 2cm / 0.5cm 3cm;
offset: url(arc.svg) 30deg / 50px 100px;
/* Global values */
offset: inherit;
offset: initial;
offset: revert;
offset: revert-layer;
offset: unset;
Examples
Animating an element along a path
HTML
<div id="offsetElement"></div>
CSS
@keyframes move {
from {
offset-distance: 0%;
}
to {
offset-distance: 100%;
}
}
#offsetElement {
width: 50px;
height: 50px;
background-color: blue;
offset: path("M 100 100 L 300 100 L 200 300 z") auto;
animation: move 3s linear infinite;
}