marker-start

The marker-start CSS property points to a marker that will be drawn on the first vertex of the element's path; that is, at its starting vertex. The marker must have been defined using an SVG <marker> element, and can only be referenced with a url() value. The value of the CSS property overrides any values of the marker-start attribute in the SVG.

For many marker-supporting shapes, the first and last vertices are in the same place: for example, the top left corner of a <rect>. In such shapes, if both the first and last markers are defined, two markers will be drawn at that point, though they may not point in the same direction.

Note: The marker-start property will only have an effect for elements that can use SVG markers. See marker-start for a list.

Syntax

css
marker-start: none;
marker-start: url(markers.svg#arrow);

/* Global values */
marker-start: inherit;
marker-start: initial;
marker-start: revert;
marker-start: revert-layer;
marker-start: unset;

Values

none

This means no marker will be drawn at the first vertex of the element's path.

<marker-ref>

A <url> that refers to a marker defined by an SVG <marker> element, to be drawn at the first vertex of the element's path. If the URL reference is invalid, no marker will be drawn at the path's first vertex.

Formal definition

Value not found in DB!

Formal syntax

marker-start = 
none          |
<marker-ref>  

<marker-ref> = 
<url>  

<url> = 
<url()>  |
<src()>  

<url()> = 
url( <string> <url-modifier>* )  |
<url-token>                      

<src()> = 
src( <string> <url-modifier>* )

Example

html
<svg viewBox="0 0 120 120" xmlns="http://www.w3.org/2000/svg">
  <defs>
    <marker
      id="triangle"
      viewBox="0 0 10 10"
      markerWidth="10"
      markerHeight="10"
      refX="1"
      refY="5"
      markerUnits="strokeWidth"
      orient="auto">
      <path d="M 0 0 L 10 5 L 0 10 z" fill="#f00" />
    </marker>
  </defs>
  <polyline
    id="test"
    fill="none"
    stroke="black"
    points="20,100 40,60 70,80 100,20" />
</svg>
css
polyline#test {
  marker-start: url(#triangle);
}

Specifications

Specification
Scalable Vector Graphics (SVG) 2
# VertexMarkerProperties

Browser compatibility

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See also