SVGMarkerElement: preserveAspectRatio property

{{APIRef("SVG")}}

The preserveAspectRatio read-only property of the {{domxref("SVGMarkerElement")}} interface returns an {{domxref("SVGAnimatedPreserveAspectRatio")}} object containing the value of the {{SVGattr("preserveAspectRatio")}} attribute of the {{SVGElement("marker")}}.

Value

An {{domxref("SVGAnimatedPreserveAspectRatio")}} object. The baseVal property of this object returns an {{domxref("SVGPreserveAspectRatio")}} object, with the following properties:

• align

  • : One of the following numeric constants:
    • 0
      • : SVG_PRESERVEASPECTRATIO_UNKNOWN
    • 1
      • : SVG_PRESERVEASPECTRATIO_NONE
    • 2
      • : SVG_PRESERVEASPECTRATIO_XMINYMIN
    • 3
      • : SVG_PRESERVEASPECTRATIO_XMIDYMIN
    • 4
      • : SVG_PRESERVEASPECTRATIO_XMAXYMIN
    • 5
      • : SVG_PRESERVEASPECTRATIO_XMINYMID
    • 6
      • : SVG_PRESERVEASPECTRATIO_XMIDYMID
    • 7
      • : SVG_PRESERVEASPECTRATIO_XMAXYMID
    • 8
      • : SVG_PRESERVEASPECTRATIO_XMINYMAX
    • 9
      • : SVG_PRESERVEASPECTRATIO_XMIDYMAX
    • 10
      • : SVG_PRESERVEASPECTRATIO_XMAXYMAX

• meetOrSlice

  • : One of the following numeric constants:
    • 0
      • : SVG_MEETORSLICE_UNKNOWN
    • 1
      • : SVG_MEETORSLICE_MEET
    • 2
      • : SVG_MEETORSLICE_SLICE

Examples

This example demonstrates how to return the numeric constants for align and meetOrSlice which relate to the values set for the {{SVGattr("preserveAspectRatio")}} attribute of {{SVGElement("marker")}}.

<svg id="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"
      preserveAspectRatio="xMidYMid meet"
      markerWidth="6"
      markerHeight="6"
      orient="auto-start-reverse">
      <path d="M 0 0 L 10 5 L 0 10 z" />
    </marker>
  </defs>
</svg>

let marker = document.getElementById("arrow");
console.log(marker.preserveAspectRatio.baseVal.align); // 6
console.log(marker.preserveAspectRatio.baseVal.meetOrSlice); // 1

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}