refY

SVG 元素
1. A
2. B-C
3. D
  1. <defs>
  2. <desc>
4. E
  1. <ellipse>
5. F
6. G
7. H
  1. <hkern>
8. I
  1. <image>
9. J-L
  1. <line>
  2. <linearGradient>
10. M
11. N-P
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
15. U
  1. <use>
16. V-Z
  1. <view>
  2. <vkern>

refY attribute defines the y coordinate of an element’s reference point.

You can use this attribute with the following SVG elements:

marker

For <marker> , refY defines the y coordinate of the marker’s reference point, which is to be placed exactly at the marker’s position on the shape.

值	`<length-percentage>` \| `<number>` \| `top` \| `center` \| `bottom`
默认值	`0`
Animatable	Yes

<length-percentage>
<number>
top
center
bottom

symbol

For <symbol> , refY defines the y coordinate of the symbol, which is defined by the cumulative effect of the y attribute and any transformations on the <symbol> and its host <use> 元素。

Unlike other positioning attributes, refY is interpreted as being in the coordinate system of the symbol contents, after application of the viewBox and preserveAspectRatio attributes. If the attribute is not specified, no vertical adjustment is made, and the top side of the symbol’s rectangular viewport region (regardless of the viewBox coordinate) is positioned at the y coordinate.

注意： For backwards compatibility, the behavior when refY is not specified on a <symbol> element is different from when it is specified with a value of 0 , and therefore different from the behavior when an equivalent attribute is not specified on a <marker> 元素。

值	`<length>` \| `top` \| `center` \| `bottom`
默认值	None
Animatable	Yes

<length-percentage>
<number>
top
center
bottom

规范

规范	状态	注释
Scalable Vector Graphics (SVG) 2 The definition of 'refY' in that specification.	候选推荐	Added keywords `left` , `center` ，和 `right` .
Scalable Vector Graphics (SVG) 2 The definition of 'refY' in that specification.	候选推荐	Initial definition for `<symbol>`
Scalable Vector Graphics (SVG) 1.1 (Second Edition) The definition of 'refY' in that specification.	推荐	Initial definition for `<marker>`

另请参阅

refX

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最后修改： Sep 23, 2021 , 由 MDN 贡献者