offset
Baseline 2022
Newly available
Since September 2022, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.
The offset
CSS shorthand property sets all the properties required for animating an element along a defined path. The offset properties together help to define an offset transform, a transform that aligns a point in an element (offset-anchor) to an offset position (offset-position) on a path (offset-path) at various points along the path (offset-distance) and optionally rotates the element (offset-rotate) to follow the direction of the path.
Note: Early versions of the spec called this property motion
.
Try it
Constituent properties
This property is a shorthand for the following CSS properties:
Syntax
css
/* 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;
Formal definition
Initial value | as each of the properties of the shorthand:
|
---|---|
Applies to | transformable elements |
Inherited | no |
Percentages | as each of the properties of the shorthand:
|
Computed value | as each of the properties of the shorthand:
|
Animation type | as each of the properties of the shorthand:
|
Creates stacking context | yes |
Formal syntax
offset =
[ <'offset-position'>? [ <'offset-path'> [ <'offset-distance'> || <'offset-rotate'> ]? ]? ]! [ / <'offset-anchor'> ]?
<offset-position> =
normal |
auto |
<position>
<offset-path> =
none |
<offset-path> || <coord-box>
<offset-distance> =
<length-percentage>
<offset-rotate> =
[ auto | reverse ] ||
<angle>
<offset-anchor> =
auto |
<position>
<position> =
[ left | center | right | top | bottom | <length-percentage> ] |
[ left | center | right ] && [ top | center | bottom ] |
[ left | center | right | <length-percentage> ] [ top | center | bottom | <length-percentage> ] |
[ [ left | right ] <length-percentage> ] && [ [ top | bottom ] <length-percentage> ]
<offset-path> =
<ray()> |
<url> |
<basic-shape>
<coord-box> =
<paint-box> |
view-box
<length-percentage> =
<length> |
<percentage>
<ray()> =
ray( <angle> &&
<ray-size>? &&
contain? &&
[ at <position> ]? )
<url> =
<url()> |
<src()>
<paint-box> =
<visual-box> |
fill-box |
stroke-box
<ray-size> =
closest-side |
closest-corner |
farthest-side |
farthest-corner |
sides
<url()> =
url( <string> <url-modifier>* ) |
<url-token>
<src()> =
src( <string> <url-modifier>* )
<visual-box> =
content-box |
padding-box |
border-box
Examples
Animating an element along a path
HTML
html
<div id="offsetElement"></div>
CSS
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;
}
Result
Specifications
Specification |
---|
Motion Path Module Level 1 # offset-shorthand |
Browser compatibility
BCD tables only load in the browser