<mask>

1. <a>
2. <defs>
3. <g>
4. <marker>
5. <mask>
6. <missing-glyph>
7. <pattern>
8. <svg>
9. <switch>
10. <symbol>
11. 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>

<mask> element defines an alpha mask for compositing the current object into the background. A mask is used/referenced using the mask 特性。

范例

html,body,svg { height:100% }

								

<svg viewBox="-10 -10 120 120">
  <mask id="myMask">
    <!-- Everything under a white pixel will be visible -->
    <rect x="0" y="0" width="100" height="100" fill="white" />
    <!-- Everything under a black pixel will be invisible -->
    <path d="M10,35 A20,20,0,0,1,50,35 A20,20,0,0,1,90,35 Q90,65,50,95 Q10,65,10,35 Z" fill="black" />
  </mask>
  <polygon points="-10,110 110,110 110,-10" fill="orange" />
  <!-- with this mask applied, we "punch" a heart shape hole into the circle -->
  <circle cx="50" cy="50" r="50" mask="url(#myMask)" />
</svg>

								

属性

height

This attribute defines the height of the masking area. Value type : <length> ; 默认值 : 120% ; Animatable : yes

maskContentUnits

This attribute defines the coordinate system for the contents of the <mask> . Value type :  userSpaceOnUse | objectBoundingBox ; 默认值 : userSpaceOnUse ; Animatable : yes

maskUnits

This attribute defines the coordinate system for attributes x , y , width and height 在 <mask> . Value type :  userSpaceOnUse | objectBoundingBox ; 默认值 : objectBoundingBox ; Animatable : yes

x

This attribute defines the x-axis coordinate of the top-left corner of the masking area. Value type : <coordinate> ; 默认值 : -10% ; Animatable : yes

y

This attribute defines the y-axis coordinate of the top-left corner of the masking area. Value type : <coordinate> ; 默认值 : -10% ; Animatable : yes

width

This attribute defines the width of the masking area. Value type : <length> ; 默认值 : 120% ; Animatable : yes

全局属性

Core Attributes

Most notably: id

Styling Attributes

class , style

Conditional Processing Attributes

Most notably: requiredExtensions , systemLanguage

Presentation Attributes

Most notably: clip-path , clip-rule , color , display , fill , fill-opacity , fill-rule , filter , mask , opacity , shape-rendering , stroke , stroke-dasharray , stroke-dashoffset , stroke-linecap , stroke-linejoin , stroke-miterlimit , stroke-opacity , stroke-width , transform , vector-effect , visibility

用法注意事项

规范

浏览器兼容性

BCD tables only load in the browser

另请参阅

• Other clipping and masking SVG elements: <clipPath>
• Clipping and masking CSS properties: mask , mask-image , mask-mode , mask-repeat , mask-position , mask-clip , mask-origin , mask-composite , mask-size , pointer-events

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最后修改： Sep 23, 2021 , 由 MDN 贡献者