offset-position

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The offset-position CSS property defines the initial position of the offset-path.

Syntax

css

/* Keyword values */
offset-position: auto;
offset-position: top;
offset-position: bottom;
offset-position: left;
offset-position: right;
offset-position: center;

/* <percentage> values */
offset-position: 25% 75%;

/* <length> values */
offset-position: 0 0;
offset-position: 1cm 2cm;
offset-position: 10ch 8em;

/* Edge offsets values */
offset-position: bottom 10px right 20px;
offset-position: right 3em bottom 10px;
offset-position: bottom 10px right;
offset-position: top right 10px;

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

Values

auto

The initial position is the position of the box specified by the position property.

<position>

A <position>. A position defines an x/y coordinate, to place an item relative to the edges of an element's box. It can be defined using one to four values. If two non-keyword values are used, the first value represents the horizontal position and the second represents the vertical position. If only one value is specified, the second value is assumed to be center. If three or four values are used, the length-percentage values are offsets for the preceding keyword value(s). For more explanation of these value types, see background-position.

Formal definition

Initial valueauto
Applies totransformable elements
Inheritedno
Percentagesrefer to the size of containing block
Computed valuefor <length> the absolute value, otherwise a percentage
Animation typea position

Formal syntax

offset-position = 
  auto        |
  <position>  

<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> ]  

<length-percentage> = 
  <length>      |
  <percentage>

Examples

Setting initial offset position

html

<div id="motion-demo"></div>

css

#motion-demo {
  offset-path: path("M20,20 C20,100 200,0 200,100");
  offset-position: left top;
  animation: move 3000ms infinite alternate ease-in-out;
  width: 40px;
  height: 40px;
  background: cyan;
}

@keyframes move {
  0% {
    offset-distance: 0%;
  }
  100% {
    offset-distance: 100%;
  }
}

Specifications

Specification
Motion Path Module Level 1
# offset-position-property

Browser compatibility

BCD tables only load in the browser

See also