内容表

• 范例
• Usage context
• 规范
• 浏览器兼容性

stroke-linejoin

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-linejoin attribute is a presentation attribute defining the shape to be used at the corners of paths when they are stroked.

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

You can use this attribute with the following SVG elements:

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

范例

html,body,svg { height:100% }

					

<svg viewBox="0 0 18 12" xmlns="http://www.w3.org/2000/svg">
  <!--
  Upper left path:
  Effect of the "miter" value
  -->
  <path d="M1,5 a2,2 0,0,0 2,-3 a3,3 0 0 1 2,3.5" stroke="black" fill="none"
        stroke-linejoin="miter" />
  <!--
  Center path:
  Effect of the "round" value
  -->
  <path d="M7,5 a2,2 0,0,0 2,-3 a3,3 0 0 1 2,3.5" stroke="black" fill="none"
        stroke-linejoin="round" />
  <!--
  Upper right path:
  Effect of the "bevel" value
  -->
  <path d="M13,5 a2,2 0,0,0 2,-3 a3,3 0 0 1 2,3.5" stroke="black" fill="none"
        stroke-linejoin="bevel" />
  <!--
  Bottom left path:
  Effect of the "miter-clip" value
  with fallback to "miter" if not supported.
  -->
  <path d="M3,11 a2,2 0,0,0 2,-3 a3,3 0 0 1 2,3.5" stroke="black" fill="none"
        stroke-linejoin="miter-clip" />
  <!--
  Bottom right path:
  Effect of the "arcs" value
  with fallback to "miter" if not supported.
  -->
  <path d="M9,11 a2,2 0,0,0 2,-3 a3,3 0 0 1 2,3.5" stroke="black" fill="none"
        stroke-linejoin="arcs" />
  <!--
  the following pink lines highlight the
  position of the path for each stroke
  -->
  <g id="highlight">
    <path d="M1,5 a2,2 0,0,0 2,-3 a3,3 0 0 1 2,3.5"
          stroke="pink" fill="none" stroke-width="0.025" />
    <circle cx="1" cy="5"   r="0.05" fill="pink" />
    <circle cx="3" cy="2"   r="0.05" fill="pink" />
    <circle cx="5" cy="5.5" r="0.05" fill="pink" />
  </g>
  <use xlink:href="#highlight" x="6" />
  <use xlink:href="#highlight" x="12" />
  <use xlink:href="#highlight" x="2" y="6" />
  <use xlink:href="#highlight" x="8" y="6" />
</svg>

					

Usage context

值	arcs | bevel | miter | miter-clip | round
默认值	miter
Animatable	discrete

arcs

注意： arcs value as been introduced in SVG2 and it isn't widely supported yet, see 浏览器兼容性 below for details.

arcs value indicates that an arcs corner is to be used to join path segments. The arcs shape is formed by extending the outer edges of the stroke at the join point with arcs that have the same curvature as the outer edges at the join point.

html,body,svg { height:100% }

					

<svg viewBox="0 0 6 6" xmlns="http://www.w3.org/2000/svg">
  <!-- Effect of the "arcs" value -->
  <path d="M1,5 a2,2 0,0,0 2,-3 a3,3 0 0 1 2,3" stroke="black" fill="none"
        stroke-linejoin="arcs" />
  <!--
  the following pink lines highlight the
  position of the path for each stroke
  -->
  <g id="p">
    <path d="M1,5 a2,2 0,0,0 2,-3 a3,3 0 0 1 2,3"
          stroke="pink" fill="none" stroke-width="0.025" />
    <circle cx="1" cy="5" r="0.05" fill="pink" />
    <circle cx="3" cy="2" r="0.05" fill="pink" />
    <circle cx="5" cy="5" r="0.05" fill="pink" />
  </g>
</svg>

					

bevel

bevel value indicates that a bevelled corner is to be used to join path segments.

html,body,svg { height:100% }

					

<svg viewBox="0 0 6 6" xmlns="http://www.w3.org/2000/svg">
  <!-- Effect of the "bevel" value -->
  <path d="M1,5 l2,-3 l2,3" stroke="black" fill="none"
        stroke-linejoin="bevel" />
  <!--
  the following pink lines highlight the
  position of the path for each stroke
  -->
  <g id="p">
    <path d="M1,5 l2,-3 l2,3"
          stroke="pink" fill="none" stroke-width="0.025" />
    <circle cx="1" cy="5" r="0.05" fill="pink" />
    <circle cx="3" cy="2" r="0.05" fill="pink" />
    <circle cx="5" cy="5" r="0.05" fill="pink" />
  </g>
</svg>

					

miter

miter value indicates that a sharp corner is to be used to join path segments. The corner is formed by extending the outer edges of the stroke at the tangents of the path segments until they intersect.

注意： 若 stroke-miterlimit is exceeded, the line join falls back to bevel .

html,body,svg { height:100% }

					

<svg viewBox="0 -1 10 7" xmlns="http://www.w3.org/2000/svg">
  <!-- Effect of the "miter" value -->
  <path d="M1,5 l2,-3 l2,3" stroke="black" fill="none"
        stroke-linejoin="miter" />
  <!-- Effect of the "miter" value on a sharp angle
       where de default miter limit is exceeded -->
  <path d="M7,5 l0.75,-3 l0.75,3" stroke="black" fill="none"
        stroke-linejoin="miter" />
  <!-- the following red dotted line show where
       the miter value falls back to the bevel value -->
  <path d="M0,0 h10" stroke="red" stroke-dasharray="0.05"  stroke-width="0.025"/>
  <!-- the following pink lines highlight the position of the path for each stroke -->
  <g>
    <path d="M1,5 l2,-3 l2,3" stroke="pink" fill="none" stroke-width="0.025" />
    <circle cx="1" cy="5" r="0.05" fill="pink" />
    <circle cx="3" cy="2" r="0.05" fill="pink" />
    <circle cx="5" cy="5" r="0.05" fill="pink" />
    <path d="M7,5 l0.75,-3 l0.75,3" stroke="pink" fill="none" stroke-width="0.025" />
    <circle cx="7"    cy="5" r="0.05" fill="pink" />
    <circle cx="7.75" cy="2" r="0.05" fill="pink" />
    <circle cx="8.5"  cy="5" r="0.05" fill="pink" />
  </g>
</svg>

					

miter-clip

注意： the miter-clip value as been introduced in SVG2 and it isn't widely supported yet, see 浏览器兼容性 below for details.

miter-clip value indicates that a sharp corner is to be used to join path segments. The corner is formed by extending the outer edges of the stroke at the tangents of the path segments until they intersect.

若 stroke-miterlimit is exceeded, the miter is clipped at a distance equal to half the stroke-miterlimit value multiplied by the stroke width from the intersection of the path segments. This provides a better rendering than miter on very sharp join or in case of an animation.

html,body,svg { height:100% }

					

<svg viewBox="0 -1 10 7" xmlns="http://www.w3.org/2000/svg">
  <!-- Effect of the "miter-clip" value -->
  <path d="M1,5 l2,-3 l2,3" stroke="black" fill="none"
        stroke-linejoin="miter-clip" />
  <!-- Effect of the "miter-clip" value on a sharp angle
       where de default miter limit is exceeded -->
  <path d="M7,5 l0.75,-3 l0.75,3" stroke="black" fill="none"
        stroke-linejoin="miter-clip" />
  <!-- the following red dotted line show where the clip should happen -->
  <path d="M0,0 h10" stroke="red" stroke-dasharray="0.05"  stroke-width="0.025"/>
  <!-- the following pink lines highlight the position of the path for each stroke -->
  <g>
    <path d="M1,5 l2,-3 l2,3" stroke="pink" fill="none" stroke-width="0.025" />
    <circle cx="1" cy="5" r="0.05" fill="pink" />
    <circle cx="3" cy="2" r="0.05" fill="pink" />
    <circle cx="5" cy="5" r="0.05" fill="pink" />
    <path d="M7,5 l0.75,-3 l0.75,3" stroke="pink" fill="none" stroke-width="0.025" />
    <circle cx="7"    cy="5" r="0.05" fill="pink" />
    <circle cx="7.75" cy="2" r="0.05" fill="pink" />
    <circle cx="8.5"  cy="5" r="0.05" fill="pink" />
  </g>
</svg>

					

round

round value indicates that a round corner is to be used to join path segments.

html,body,svg { height:100% }

					

<svg viewBox="0 0 6 6" xmlns="http://www.w3.org/2000/svg">
  <!-- Effect of the "round" value -->
  <path d="M1,5 l2,-3 l2,3" stroke="black" fill="none"
        stroke-linejoin="round" />
  <!--
  the following pink lines highlight the
  position of the path for each stroke
  -->
  <g id="p">
    <path d="M1,5 l2,-3 l2,3"
          stroke="pink" fill="none" stroke-width="0.025" />
    <circle cx="1" cy="5" r="0.05" fill="pink" />
    <circle cx="3" cy="2" r="0.05" fill="pink" />
    <circle cx="5" cy="5" r="0.05" fill="pink" />
  </g>
</svg>

					

规范

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

浏览器兼容性

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最后修改： Sep 23, 2021 , 由 MDN 贡献者