内容表

• 范例
• 用法注意事项
• 浏览器兼容性
• 规范

stroke-opacity

1. SVG 元素

   1. A
      1. <a>
      2. <altGlyph>
      3. <altGlyphDef>
      4. <altGlyphItem>
      5. <animate>
      6. <animateColor>
      7. <animateMotion>
      8. <animateTransform>
   2. B-C
      1. <circle>
      2. <clipPath>
      3. <color-profile>
      4. <cursor>
   3. D
      1. <defs>
      2. <desc>
   4. E
      1. <ellipse>
   5. F
      1. <feBlend>
      2. <feColorMatrix>
      3. <feComponentTransfer>
      4. <feComposite>
      5. <feConvolveMatrix>
      6. <feDiffuseLighting>
      7. <feDisplacementMap>
      8. <feDistantLight>
      9. <feFlood>
      10. <feFuncA>
      11. <feFuncB>
      12. <feFuncG>
      13. <feFuncR>
      14. <feGaussianBlur>
      15. <feImage>
      16. <feMerge>
      17. <feMergeNode>
      18. <feMorphology>
      19. <feOffset>
      20. <fePointLight>
      21. <feSpecularLighting>
      22. <feSpotLight>
      23. <feTile>
      24. <feTurbulence>
      25. <filter>
      26. <font>
      27. <font-face>
      28. <font-face-format>
      29. <font-face-name>
      30. <font-face-src>
      31. <font-face-uri>
      32. <foreignObject>
   6. G
      1. <g>
      2. <glyph>
      3. <glyphRef>
   7. H
      1. <hkern>
   8. I
      1. <image>
   9. J-L
      1. <line>
      2. <linearGradient>
   10. M
       1. <marker>
       2. <mask>
       3. <metadata>
       4. <missing-glyph>
       5. <mpath>
   11. N-P
       1. <path>
       2. <pattern>
       3. <polygon>
       4. <polyline>
   12. Q-R
       1. <radialGradient>
       2. <rect>
   13. S
       1. <script>
       2. <set>
       3. <stop>
       4. <style>
       5. <svg>
       6. <switch>
       7. <symbol>
   14. T
       1. <text>
       2. <textPath>
       3. <title>
       4. <tref>
       5. <tspan>
   15. U
       1. <use>
   16. V-Z
       1. <view>
       2. <vkern>

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.

注意： As a presentation attribute stroke-opacity can be used as a CSS property.

You can use this attribute with the following SVG elements:

• <altGlyph>
• <circle>
• <ellipse>
• <path>
• <line>
• <polygon>
• <polyline>
• <rect>
• <text>
• <textPath>
• <tref>
• <tspan>

范例

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>

					

用法注意事项

值	[0-1] | <percentage>
默认值	1
Animatable	Yes

注意： SVG2 introduces percentage values for stroke-opacity , however, it is not widely supported yet ( 见 浏览器兼容性 below ) as a consequence, it is best practices to set opacity with a value in the range [0-1] .

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 属性。

浏览器兼容性

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规范

规范	状态	注释
Scalable Vector Graphics (SVG) 2 The definition of 'stroke-opacity' in that specification.	候选推荐	Definition for shapes and texts
Scalable Vector Graphics (SVG) 1.1 (Second Edition) The definition of 'stroke-opacity' in that specification.	推荐	Initial definition for shapes and texts

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最后修改： Sep 23, 2021 , 由 MDN 贡献者