files/zh-cn/web/svg/element/radialgradient/index.html


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---
title: radialGradient
slug: Web/SVG/Element/radialGradient
tags:
  - SVG
  - SVG渐变
  - 元素
translation_of: Web/SVG/Element/radialGradient
---
<div>{{SVGRef}}</div>

<p><code>radialGradient</code> 用来定义径向渐变，以对图形元素进行填充或描边。</p>

<h2 id="用法">用法</h2>

<p>{{svginfo}}</p>

<h2 id="属性">属性</h2>

<h3 id="全局属性">全局属性</h3>

<ul>
 <li><a href="/en-US/docs/Web/SVG/Attribute#Core">核心属性</a> »</li>
 <li><a href="/en-US/docs/Web/SVG/Attribute#Presentation">外观属性</a> »</li>
 <li><a href="/en-US/docs/Web/SVG/Attribute#XLink">Xlink属性</a> »</li>
 <li>{{SVGAttr("class")}}</li>
 <li>{{SVGAttr("style")}}</li>
 <li>{{SVGAttr("externalResourcesRequired")}}</li>
</ul>

<h3 id="专有属性">专有属性</h3>

<ul>
 <li>{{SVGAttr("gradientUnits")}}</li>
 <li>{{SVGAttr("gradientTransform")}}</li>
 <li>{{SVGAttr("cx")}}</li>
 <li>{{SVGAttr("cy")}}</li>
 <li>{{SVGAttr("r")}}</li>
 <li>{{SVGAttr("fx")}}</li>
 <li>{{SVGAttr("fy")}}</li>
 <li>{{SVGAttr("fr")}}</li>
 <li>{{SVGAttr("spreadMethod")}}</li>
 <li>{{SVGAttr("xlink:href")}}</li>
</ul>

<h2 id="DOM_接口">DOM 接口</h2>

<p>该元素实现了 {{domxref("SVGRadialGradientElement")}} 接口。</p>

<h2 id="示例">示例</h2>

<h3 id="SVG">SVG</h3>

<pre class="brush: xml"><code class="language-html"><span class="tag token"><span class="tag token"><span class="punctuation token">&lt;</span>svg</span> <span class="attr-name token">width</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>120<span class="punctuation token">"</span></span> <span class="attr-name token">height</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>120<span class="punctuation token">"</span></span> <span class="attr-name token">viewBox</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>0 0 240 120<span class="punctuation token">"</span></span>
   <span class="attr-name token">xmlns</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>http://www.w3.org/2000/svg<span class="punctuation token">"</span></span><span class="punctuation token">&gt;</span></span>
  <span class="tag token"><span class="tag token"><span class="punctuation token">&lt;</span>defs</span><span class="punctuation token">&gt;</span></span>
    <span class="tag token"><span class="tag token"><span class="punctuation token">&lt;</span>radialGradient</span> <span class="attr-name token">id</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>exampleGradient<span class="punctuation token">"</span></span><span class="punctuation token">&gt;</span></span>
      <span class="tag token"><span class="tag token"><span class="punctuation token">&lt;</span>stop</span> <span class="attr-name token">offset</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>10%<span class="punctuation token">"</span></span> <span class="attr-name token">stop-color</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>gold<span class="punctuation token">"</span></span><span class="punctuation token">/&gt;</span></span>
      <span class="tag token"><span class="tag token"><span class="punctuation token">&lt;</span>stop</span> <span class="attr-name token">offset</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>95%<span class="punctuation token">"</span></span> <span class="attr-name token">stop-color</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>green<span class="punctuation token">"</span></span><span class="punctuation token">/&gt;</span></span>
    <span class="tag token"><span class="tag token"><span class="punctuation token">&lt;/</span>radialGradient</span><span class="punctuation token">&gt;</span></span>
    <span class="tag token"><span class="tag token"><span class="punctuation token">&lt;</span>radialGradient</span> <span class="attr-name token">spreadMethod</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>reflect<span class="punctuation token">"</span></span>
                    <span class="attr-name token">cx</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>50%<span class="punctuation token">"</span></span>
                    <span class="attr-name token">cy</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>50%<span class="punctuation token">"</span></span>
                    <span class="attr-name token">r</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>50%<span class="punctuation token">"</span></span>
                    <span class="attr-name token">fx</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>25%<span class="punctuation token">"</span></span>
                    <span class="attr-name token">fy</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>75%<span class="punctuation token">"</span></span>
                    <span class="attr-name token">fr</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>10%<span class="punctuation token">"</span></span>
                   <span class="attr-name token">id</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>flameGradient<span class="punctuation token">"</span></span><span class="punctuation token">&gt;</span></span>
      <span class="tag token"><span class="tag token"><span class="punctuation token">&lt;</span>stop</span> <span class="attr-name token">offset</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>0%<span class="punctuation token">"</span></span> <span class="attr-name token">stop-color</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>white<span class="punctuation token">"</span></span><span class="punctuation token">/&gt;</span></span>
      <span class="tag token"><span class="tag token"><span class="punctuation token">&lt;</span>stop</span> <span class="attr-name token">offset</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>10%<span class="punctuation token">"</span></span> <span class="attr-name token">stop-color</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>yellow<span class="punctuation token">"</span></span><span class="punctuation token">/&gt;</span></span>
      <span class="tag token"><span class="tag token"><span class="punctuation token">&lt;</span>stop</span> <span class="attr-name token">offset</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>95%<span class="punctuation token">"</span></span> <span class="attr-name token">stop-color</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>red<span class="punctuation token">"</span></span><span class="punctuation token">/&gt;</span></span>
    <span class="tag token"><span class="tag token"><span class="punctuation token">&lt;/</span>radialGradient</span><span class="punctuation token">&gt;</span></span>
  <span class="tag token"><span class="tag token"><span class="punctuation token">&lt;/</span>defs</span><span class="punctuation token">&gt;</span></span>
  <span class="tag token"><span class="tag token"><span class="punctuation token">&lt;</span>circle</span> <span class="attr-name token">fill</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>url(#exampleGradient)<span class="punctuation token">"</span></span> <span class="attr-name token">cx</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>60<span class="punctuation token">"</span></span> <span class="attr-name token">cy</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>60<span class="punctuation token">"</span></span> <span class="attr-name token">r</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>50<span class="punctuation token">"</span></span><span class="punctuation token">/&gt;</span></span>
  <span class="tag token"><span class="tag token"><span class="punctuation token">&lt;</span>circle</span> <span class="attr-name token">fill</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>url(#flameGradient)<span class="punctuation token">"</span></span> <span class="attr-name token">cx</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>180<span class="punctuation token">"</span></span> <span class="attr-name token">cy</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>60<span class="punctuation token">"</span></span> <span class="attr-name token">r</span><span class="attr-value token"><span class="punctuation token">=</span><span class="punctuation token">"</span>50<span class="punctuation token">"</span></span><span class="punctuation token">/&gt;</span></span>
<span class="tag token"><span class="tag token"><span class="punctuation token">&lt;/</span>svg</span><span class="punctuation token">&gt;</span></span></code></pre>

<h3 id="结果">结果</h3>

<p>{{EmbedLiveSample("Example", 120, 120)}}</p>

<h2 id="技术参数">技术参数</h2>

<table class="standard-table">
 <thead>
  <tr>
   <th scope="col">技术参数</th>
   <th scope="col">状态</th>
   <th scope="col">注释</th>
  </tr>
 </thead>
 <tbody>
  <tr>
   <td>{{SpecName('SVG2', 'pservers.html#RadialGradients', '&lt;radialGradient&gt;')}}</td>
   <td>{{Spec2('SVG2')}}</td>
   <td>加入 <code>fr</code> 属性</td>
  </tr>
  <tr>
   <td>{{SpecName('SVG1.1', 'pservers.html#RadialGradients', '&lt;radialGradient&gt;')}}</td>
   <td>{{Spec2('SVG1.1')}}</td>
   <td>初始定义</td>
  </tr>
 </tbody>
</table>

<h2 id="浏览器兼容性">浏览器兼容性</h2>

<p>{{Compat("svg.elements.radialGradient")}}</p>

<h2 id="相关内容">相关内容</h2>

<ul>
 <li>{{SVGElement("linearGradient")}}</li>
</ul>