The stroke-width attribute is a presentation attribute defining the width of the stroke to be applied to the shape. It applies to any SVG shape or text-content element, but as an inherited property, it may be applied to elements such as <g> and still have the intended effect on descendant elements' strokes.
Note: As a presentation attribute, stroke-width also has a CSS property counterpart: stroke-width. When both are specified, the CSS property takes priority.
You can use this attribute with the following SVG elements:
<svg viewBox="0 0 30 10" xmlns="http://www.w3.org/2000/svg">
<!-- Default stroke width: 1 -->
<circle cx="5" cy="5" r="3" stroke="green" />
<!-- Stroke width as a number -->
<circle cx="15" cy="5" r="3" stroke="green" stroke-width="3" />
<!-- Stroke width as a percentage -->
<circle cx="25" cy="5" r="3" stroke="green" stroke-width="2%" />
</svg>| Value | <length> | <percentage> |
|---|---|
| Default value | 1px |
| Animatable | Yes |
Note: A percentage value is always computed as a percentage of the normalized viewBox diagonal length.
stroke-width property