The clipPathUnits attribute indicates which coordinate system to use for the contents of the <clipPath> element.

Only one element is using this attribute: <clipPath>

<svg viewBox="0 0 100 100">
  <clipPath id="myClip1" clipPathUnits="userSpaceOnUse">
    <circle cx="50" cy="50" r="35" />
  <clipPath id="myClip2" clipPathUnits="objectBoundingBox">
    <circle cx=".5" cy=".5" r=".35" />
  <!-- Some reference rect to materilized to clip path -->
  <rect id="r1" x="0"  y="0"  width="45" height="45" />
  <rect id="r2" x="0"  y="55" width="45" height="45" />
  <rect id="r3" x="55" y="55" width="45" height="45" />
  <rect id="r4" x="55" y="0"  width="45" height="45" />
  <!-- The first 3 rect are cliped with useSpaceOnUse units -->
  <use clip-path="url(#myClip1)" xlink:href="#r1" fill="red" />
  <use clip-path="url(#myClip1)" xlink:href="#r2" fill="red" />
  <use clip-path="url(#myClip1)" xlink:href="#r3" fill="red" />
  <!-- The last rect is cliped with objectBoundingBox units -->
  <use clip-path="url(#myClip2)" xlink:href="#r4" fill="red" />


For <clipPath>, clipPathUnits define the coordinate system in use for the content of the element.

Value userSpaceOnUse | objectBoundingBox
Default value userSpaceOnUse
Animatable Yes
This value indicates that all coordinates inside the clipPath element refer to the user coordinate system as defined when the clipPath was created.
This value indicates that all coordinates inside the clipPath element are relative to the bounding box of the element the clipPath is applied to. It means that the origin of the coordinate system is the top left corner of the object bounding box and the width and height of the object bounding box are considered to have a length of 1 unit value.


Specification Status Comment
CSS Masking Module Level 1
The definition of 'clipPathUnits' in that specification.
Candidate Recommendation  
Scalable Vector Graphics (SVG) 1.1 (Second Edition)
The definition of 'clipPathUnits' in that specification.
Recommendation Initial definition

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Contributors to this page: Jeremie
Last updated by: Jeremie,