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---
title: cy
slug: Web/SVG/Attribute/cy
tags:
- SVG
- SVG属性
translation_of: Web/SVG/Attribute/cy
---
<div>{{SVGRef}}</div>
<p><strong><code>cy</code></strong> 属性定义一个中心点的 y 轴坐标。</p>
<p>有三个元素在使用此属性：{{SVGElement("circle")}}，{{SVGElement("ellipse")}} 和 {{SVGElement("radialGradient")}}</p>
<div id="topExample">
<div class="hidden">
<pre class="brush: css">html,body,svg { height:100% }</pre>
</div>
<pre class="brush: html"><svg viewBox="0 0 100 300" xmlns="http://www.w3.org/2000/svg">
<radialGradient cy="25%" id="myGradient">
<stop offset="0" stop-color="white" />
<stop offset="100%" stop-color="black" />
</radialGradient>
<circle cy="50" cx="50" r="45"/>
<ellipse cy="150" cx="50" rx="45" ry="25" />
<rect x="5" y="205" width="90" height="90" fill="url(#myGradient)" />
</svg></pre>
<p>{{EmbedLiveSample('topExample', '100%', 300)}}</p>
</div>
<h2 id="圆">圆</h2>
<p>对于 {{SVGElement('circle')}}，<code>cy</code> 用来定义图形中心的 y 轴坐标。</p>
<table class="standard-table">
<tbody>
<tr>
<th scope="row">值</th>
<td><strong><a href="/docs/Web/SVG/Content_type#Length"><length></a></strong> | <strong><a href="/docs/Web/SVG/Content_type#Percentage"><percentage></a></strong></td>
</tr>
<tr>
<th scope="row">默认值</th>
<td><code>0</code></td>
</tr>
<tr>
<th scope="row">可变性</th>
<td>Yes</td>
</tr>
</tbody>
</table>
<p class="note"><strong>注：</strong>起始于 SVG2，<code>cy</code> 是一个几何属性，意味着该属性也可以用作圆的 CSS 属性。</p>
<h2 id="椭圆">椭圆</h2>
<p>对于 {{SVGElement('ellipse')}}，<code>cy</code> 用来定义图形中心的 y 轴坐标。</p>
<table class="standard-table">
<tbody>
<tr>
<th scope="row">值</th>
<td><strong><a href="/docs/Web/SVG/Content_type#Length"><length></a></strong> | <strong><a href="/docs/Web/SVG/Content_type#Percentage"><percentage></a></strong></td>
</tr>
<tr>
<th scope="row">默认值</th>
<td><code>0</code></td>
</tr>
<tr>
<th scope="row">可变性</th>
<td>Yes</td>
</tr>
</tbody>
</table>
<p class="note"><strong>注：</strong>起始于 SVG2，<code>cy</code> 是一个几何属性，意味着该属性也可以用作椭圆的 CSS 属性。</p>
<h2 id="径向渐变">径向渐变</h2>
<p>对于 {{SVGElement('radialGradient')}}，<code>cy</code> 用来定义径向渐变终止圆的 y 轴坐标。</p>
<table class="standard-table">
<tbody>
<tr>
<th scope="row">值</th>
<td><strong><a href="/docs/Web/SVG/Content_type#Length"><length></a></strong></td>
</tr>
<tr>
<th scope="row">默认值</th>
<td><code>50%</code></td>
</tr>
<tr>
<th scope="row">可变性</th>
<td>Yes</td>
</tr>
</tbody>
</table>
<h4 id="示例">示例</h4>
<div class="hidden">
<pre class="brush: css">html,body,svg { height:100% }</pre>
</div>
<pre class="brush: html"><svg viewBox="0 0 34 10" xmlns="http://www.w3.org/2000/svg">
<defs>
<radialGradient cy="0" id="myGradient000">
<stop offset="0%" stop-color="gold" />
<stop offset="50%" stop-color="green" />
<stop offset="100%" stop-color="white" />
</radialGradient>
<radialGradient cy="50%" id="myGradient050">
<stop offset="0%" stop-color="gold" />
<stop offset="50%" stop-color="green" />
<stop offset="100%" stop-color="white" />
</radialGradient>
<radialGradient cy="100%" id="myGradient100">
<stop offset="0%" stop-color="gold" />
<stop offset="50%" stop-color="green" />
<stop offset="100%" stop-color="white" />
</radialGradient>
</defs>
<rect x="1" y="1" width="8" height="8" fill="url(#myGradient000)" stroke="black" />
<rect x="13" y="1" width="8" height="8" fill="url(#myGradient050)" stroke="black" />
<rect x="25" y="1" width="8" height="8" fill="url(#myGradient100)" stroke="black" />
</svg></pre>
<p>{{EmbedLiveSample('radialGradient', 150, '100%')}}</p>
<h2 id="技术规范">技术规范</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">技术规范</th>
<th scope="col">状态</th>
<th scope="col">注释</th>
</tr>
</thead>
<tbody>
<tr>
<td>{{SpecName("SVG2", "geometry.html#CY", "cy")}}</td>
<td>{{Spec2("SVG2")}}</td>
<td>Definition as a geometry property</td>
</tr>
<tr>
<td>{{SpecName("SVG2", "pservers.html#RadialGradientElementCYAttribute", "cy")}}</td>
<td>{{Spec2("SVG2")}}</td>
<td>Definition for SVG2 paint servers.</td>
</tr>
<tr>
<td>{{SpecName("SVG1.1", "pservers.html#RadialGradientElementCYAttribute", "cy")}}</td>
<td>{{Spec2("SVG1.1")}}</td>
<td>Initial definition for <code><radialGradient></code></td>
</tr>
<tr>
<td>{{SpecName("SVG1.1", "shapes.html#EllipseElementCYAttribute", "cy")}}</td>
<td>{{Spec2("SVG1.1")}}</td>
<td>Initial definition for <code><ellipse></code></td>
</tr>
<tr>
<td>{{SpecName("SVG1.1", "shapes.html#CircleElementCYAttribute", "cy")}}</td>
<td>{{Spec2("SVG1.1")}}</td>
<td>Initial definition for <code><circle></code></td>
</tr>
</tbody>
</table>
|
