offset-path
Quick Summary for offset-path
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.
Code Usage for offset-path
/* 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: revert; offset-path: unset;
More Details for offset-path
offset-path
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: revert; 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 from closest-side
to farthest-corner
, and the keyterm contain
.
url()
References the ID of an SVG shape -- circle
, ellipse
, line
, path
, polygon
, polyline
, or rect
-- using the shape's geometry as the path.
<basic-shape>
Specifies a CSS shape including circle()
, ellipse()
, inset()
, polygon()
, or path()
.
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 element's 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-box
where
<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-box
where
<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.
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%; } }
ResultSpecifications
Specification |
---|
Motion Path Module Level 1 # offset-path-property |
See also
offset
offset-distance
offset-rotate
SVG <path> path()
Other demos:
Examples of the various values Triangle Scissors Eyes