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This feature is well established and works across many devices and browser versions. It’s been available across browsers since January 2020.
The primitiveUnits attribute specifies the coordinate system for the various length values within the filter primitives and for the attributes that define the filter primitive subregion.
You can use this attribute with the following SVG elements:
| userSpaceOnUse | objectBoundingBox |
| userSpaceOnUse |
| Yes |
This value indicates that any length values within the filter definitions represent values in the current user coordinate system in place at the time when the <filter> element is referenced (i.e., the user coordinate system for the element referencing the <filter> element via a filter attribute).
objectBoundingBoxThis value indicates that any length values within the filter definitions represent fractions or percentages of the bounding box on the referencing element.
| Filter Effects Module Level 1 # element-attrdef-filter-primitiveunits |
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This page was last modified on Mar 18, 2025 by MDN contributors.
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