The offset-path
CSS property specifies a motion path for an element to follow and defines the element's positioning within the parent container or SVG coordinate system.
Syntax
/* Default */ offset-path: none; /* Function values */ offset-path: ray(45deg closest-side contain); /* URL */ offset-path: url(#path); /* Shapes */ offset-path: circle(50% at 25% 25%); offset-path: inset(50% 50% 50% 50%); offset-path: polygon(30% 0%, 70% 0%, 100% 50%, 30% 100%, 0% 70%, 0% 30%); offset-path: path('M 0,200 Q 200,200 260,80 Q 290,20 400,0 Q 300,100 400,200'); /* Geometry Boxes */ offset-path: margin-box; offset-path: stroke-box; /* Global values */ offset-path: inherit; offset-path: initial; offset-path: unset;
Values
ray()
- Taking up to three values, defines a path that is a line segment starting from the position of the box and proceeds in the direction defined by the specified angle similar to the CSS gradient angle where
0deg
is up, with positive angles increasing in the clockwise direction, with the size value being similar to the CSS radial gradient size values fromclosest-side
tofarthest-corner
, and the keytermcontain
. url()
- References the ID of an SVG shape --
circle
,ellipse
,line
,path
,polygon
,polyline
, orrect
-- using the shape's geometry as the path. <basic-shape>
- Specifies a CSS shape including
circle()
,ellipse()
,inset()
,polygon()
, orpath()
. -
path()
- A path string defined with SVG coordinate syntax.
none
- Specifies no motion path at all.
Description
This property defines a path an animated element can follow. An offset path is either a specified path with one or multiple sub-paths or the geometry of a not-styled basic shape. The elementβs exact position on the offset path is determined by the offset-distance
property. Each shape or path must define an initial position for the computed value of 0
for offset-distance
and an initial direction which specifies the rotation of the object to the initial position.
Early versions of the spec called this property motion-path
. It was changed to offset-path
because the property describes static positions, not motion.
Formal definition
Initial value | none |
---|---|
Applies to | transformable elements |
Inherited | no |
Computed value | as specified |
Animation type | as <angle>, <basic-shape> or <path()> |
Creates stacking context | yes |
Formal syntax
none | ray( [ <angle> && <size>? && contain? ] ) | <path()> | <url> | [ <basic-shape> | <geometry-box> ]where
<size> = closest-side | farthest-side | closest-corner | farthest-corner | <length> | <length-percentage>{2}
<path()> = path( [ <fill-rule>, ]? <string> )
<basic-shape> = <inset()> | <circle()> | <ellipse()> | <polygon()> | <path()>
<geometry-box> = <shape-box> | fill-box | stroke-box | view-boxwhere
<length-percentage> = <length> | <percentage>
<fill-rule> = nonzero | evenodd
<inset()> = inset( <length-percentage>{1,4} [ round <'border-radius'> ]? )
<circle()> = circle( [ <shape-radius> ]? [ at <position> ]? )
<ellipse()> = ellipse( [ <shape-radius>{2} ]? [ at <position> ]? )
<polygon()> = polygon( <fill-rule>? , [ <length-percentage> <length-percentage> ]# )
<shape-box> = <box> | margin-boxwhere
<shape-radius> = <length-percentage> | closest-side | farthest-side
<position> = [ [ left | center | right ] | [ top | center | bottom ] | [ left | center | right | <length-percentage> ] [ top | center | bottom | <length-percentage> ]? | [ [ left | right ] <length-percentage> ] && [ [ top | bottom ] <length-percentage> ] ]
<box> = border-box | padding-box | content-box
Examples
Animating an element with offset-path
The offset-path
properties in the CSS code sample defines a motion path that is identical to the <path>
element in the SVG. The path, as can be seen in the rendering of the SVG code, is a line drawing of a house with a chimney.
SVG
The top and bottom halves of the scissors would appear in the top left of the canvas were they not positioned along the starting point of the motion path defined by offset-path
.
<svg xmlns="http://www.w3.org/2000/svg" width="700" height="450" viewBox="350 0 1400 900"> <title>House and Scissors</title> <rect x="595" y="423" width="610" height="377" fill="blue" /> <polygon points="506,423 900,190 1294,423" fill="yellow" /> <polygon points="993,245 993,190 1086,190 1086,300" fill="red" /> <path id="house" d="M900,190 L993,245 V201 A11,11 0 0,1 1004,190 H1075 A11,11 0 0,1 1086,201 V300 L1294,423 H1216 A11,11 0 0,0 1205,434 V789 A11,11 0 0,1 1194,800 H606 A11,11 0 0,1 595,789 V434 A11,11 0 0,0 584,423 H506 L900,190" fill="none" stroke="black" stroke-width="13" stroke-linejoin="round" stroke-linecap="round" /> <path id="firstScissorHalf" class="scissorHalf" d="M30,0 H-10 A10,10 0 0,0 -20,10 A20,20 0 1,1 -40,-10 H20 A10,10 0 0,1 30,0 M-40,20 A10,10 1 0,0 -40,0 A10,10 1 0,0 -40,20 M0,0" transform="translate(0,0)" fill="green" stroke="black" stroke-width="5" stroke-linejoin="round" stroke-linecap="round" fill-rule="evenodd" /> <path id="secondScissorHalf" class="scissorHalf" d="M30,0 H-10 A10,10 0 0,1 -20,-10 A20,20 0 1,0 -40,10 H20 A10,10 0 0,0 30,0 M-40,-20 A10,10 1 0,0 -40,0 A10,10 1 0,0 -40,-20 M0,0" transform="translate(0,0)" fill="forestgreen" stroke="black" stroke-width="5" stroke-linejoin="round" stroke-linecap="round" fill-rule="evenodd" /> </svg>
CSS
.scissorHalf { offset-path: path('M900,190 L993,245 V201 A11,11 0 0,1 1004,190 H1075 A11,11 0 0,1 1086,201 V300 L1294,423 H1216 A11,11 0 0,0 1205,434 V789 A11,11 0 0,1 1194,800 H606 A11,11 0 0,1 595,789 V434 A11,11 0 0,0 584,423 H506 L900,190'); animation: followpath 4s linear infinite; } @keyframes followpath { to { motion-offset: 100%; offset-distance: 100%; } }
Result
Specifications
<body>
Specification | Status | Comment |
---|---|---|
Motion Path Module Level 1 The definition of 'offset-path' in that specification. |
Working Draft | Initial definition |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
offset-path | Chrome
Full support
55
| Edge
Full support
79
| Firefox
Full support
72
| IE No support No | Opera
Full support
45
| Safari No support No | WebView Android
Full support
55
| Chrome Android
Full support
55
| Firefox Android
Full support
63
| Opera Android
Full support
43
| Safari iOS No support No | Samsung Internet Android
Full support
6.0
|
Supports the path() function as a value | Chrome Full support 64 | Edge Full support 79 | Firefox Full support 63 | IE No support No | Opera Full support 51 | Safari No support No | WebView Android Full support 64 | Chrome Android Full support 64 | Firefox Android Full support 63 | Opera Android Full support 47 | Safari iOS No support No | Samsung Internet Android Full support 9.0 |
Supports the ray() function as a value | Chrome Full support 64 | Edge Full support 79 | Firefox
Full support
71
| IE No support No | Opera Full support 51 | Safari No support No | WebView Android Full support 64 | Chrome Android Full support 64 | Firefox Android No support No | Opera Android Full support 47 | Safari iOS No support No | Samsung Internet Android Full support 9.0 |
Legend
- Full support
- Full support
- No support
- No support
- See implementation notes.
- See implementation notes.
- User must explicitly enable this feature.
- User must explicitly enable this feature.
- Uses a non-standard name.
- Uses a non-standard name.
See also
Other demos: