stroke-opacity
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2020.
The stroke-opacity attribute is a presentation attribute defining the opacity of the paint server (color, gradient, pattern, etc.) applied to the stroke of a shape.
Note:
As a presentation attribute, stroke-opacity also has a CSS property counterpart: stroke-opacity. When both are specified, the CSS property takes priority.
You can use this attribute with the following SVG elements:
Example
html,
body,
svg {
height: 100%;
}
<svg viewBox="0 0 40 10" xmlns="http://www.w3.org/2000/svg">
<!-- Default stroke opacity: 1 -->
<circle cx="5" cy="5" r="4" stroke="green" />
<!-- Stroke opacity as a number -->
<circle cx="15" cy="5" r="4" stroke="green" stroke-opacity="0.7" />
<!-- Stroke opacity as a percentage -->
<circle cx="25" cy="5" r="4" stroke="green" stroke-opacity="50%" />
<!-- Stroke opacity as a CSS property -->
<circle cx="35" cy="5" r="4" stroke="green" style="stroke-opacity: .3;" />
</svg>
Usage notes
| Value |
[0-1] |
<percentage>
|
|---|---|
| Default value | 1 |
| Animatable | Yes |
It's important to know that the stroke partially covers the fill of a shape, so a stroke with an opacity different than 1 will partially show the fill underneath. To avoid this effect, it is possible to apply a global opacity with the opacity attribute or to put the stroke behind the fill with the paint-order attribute.
Specifications
| Specification |
|---|
| Scalable Vector Graphics (SVG) 2 # StrokeOpacity |
Browser compatibility
Enable JavaScript to view this browser compatibility table.
See also
- CSS
stroke-opacityproperty