W3cubDocs

/SVG

underline-thickness

The underline-thickness attribute represents the ideal thickness of the underline. The underline thickness is expressed in the font's coordinate system.

You can use this attribute with the following SVG elements:

Usage context

Categories None
Value <number>
Animatable No
Normative document SVG 1.1 (2nd Edition)

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https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/underline-thickness