orient

Example

html,
body,
svg {
  height: 100%;
}

<svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg">
  <defs>
    <marker
      id="arrow"
      viewBox="0 0 10 10"
      refX="5"
      refY="5"
      markerWidth="6"
      markerHeight="6"
      orient="auto-start-reverse">
      <path d="M 0 0 L 10 5 L 0 10 z" />
    </marker>

    <marker
      id="dataArrow"
      viewBox="0 0 10 10"
      refX="5"
      refY="5"
      markerWidth="6"
      markerHeight="6"
      orient="-65deg">
      <path d="M 0 0 L 10 5 L 0 10 z" fill="red" />
    </marker>
  </defs>

  <polyline
    points="10,10 10,90 90,90"
    fill="none"
    stroke="black"
    marker-start="url(#arrow)"
    marker-end="url(#arrow)" />

  <polyline
    points="15,80 29,50 43,60 57,30 71,40 85,15"
    fill="none"
    stroke="grey"
    marker-start="url(#dataArrow)"
    marker-mid="url(#dataArrow)"
    marker-end="url(#dataArrow)" />
</svg>

Usage notes

auto

This value indicates that the marker is oriented such that its positive x-axis is pointing in a direction relative to the path at the position the marker is placed.

auto-start-reverse

If placed by marker-start, the marker is oriented 180° different from the orientation that would be used if auto were specified. For all other markers, auto-start-reverse means the same as auto.

Note: This allows a single arrowhead marker to be defined that can be used for both the start and end of a path, i.e., which points outwards from both ends.

<angle>

This value indicates that the marker is oriented such that the specified angle is that measured between the shape's positive x-axis and the marker's positive x-axis.

Note: For example, if a value of 45 is given, then the marker's positive x-axis would be pointing down and right in the shape's coordinate system.

<number>

This value indicates an angle in degrees. The marker is oriented such that the specified angle is that measured between the shape's positive x-axis and the marker's positive x-axis.

Specifications

Browser compatibility