SVGCircleElement

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方法
范例
规范
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SVGCircleElement interface is an interface for the <circle> 元素。

  <div id="interfaceDiagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 20%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 700 140" preserveAspectRatio="xMinYMin meet"><a xlink:href="../API/EventTarget.html" target="_top"><rect x="1" y="1" width="110" height="50" fill="#fff" stroke="#D4DDE4" stroke-width="2px" /><text  x="56" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">EventTarget</text></a><polyline points="111,25  121,20  121,30  111,25" stroke="#D4DDE4" fill="none"/><line x1="121" y1="25" x2="151" y2="25" stroke="#D4DDE4"/><a xlink:href="../API/Node" target="_top"><rect x="151" y="1" width="75" height="50" fill="#fff" stroke="#D4DDE4" stroke-width="2px" /><text  x="188.5" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">Node</text></a><polyline points="226,25  236,20  236,30  226,25" stroke="#D4DDE4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#D4DDE4"/><a xlink:href="../API/Element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#D4DDE4" stroke-width="2px" /><text  x="303.5" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">Element</text></a><polyline points="341,25  351,20  351,30  341,25" stroke="#D4DDE4" fill="none"/><line x1="351" y1="25" x2="381" y2="25" stroke="#D4DDE4"/><a xlink:href="../API/SVGElement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#D4DDE4" stroke-width="2px" /><text  x="431" y="30" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">SVGElement</text></a><polyline points="481,25  491,20  491,30  481,25" stroke="#D4DDE4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#D4DDE4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#D4DDE4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#D4DDE4"/><a xlink:href="../API/SVGGraphicsElement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#D4DDE4" stroke-width="2px" /><text  x="391" y="94" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">SVGGraphicsElement</text></a><polyline points="301,89  291,84  291,94  301,89" stroke="#D4DDE4" fill="none"/><line x1="291" y1="89" x2="261" y2="89" stroke="#D4DDE4"/><a xlink:href="../API/SVGGeometryElement" target="_top"><rect x="81" y="65" width="180" height="50" fill="#fff" stroke="#D4DDE4" stroke-width="2px" /><text  x="171" y="94" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">SVGGeometryElement</text></a><polyline points="81,89  71,84  71,94  81,89" stroke="#D4DDE4" fill="none"/><line x1="71" y1="89" x2="41" y2="89" stroke="#D4DDE4"/><a xlink:href="../API/SVGCircleElement" target="_top"><rect x="-119" y="65" width="160" height="50" fill="#F4F7F8" stroke="#D4DDE4" stroke-width="2px" /><text  x="-39" y="94" font-size="12px" font-family="Consolas,Monaco,Andale Mono,monospace" fill="#4D4E53" text-anchor="middle" alignment-baseline="middle">SVGCircleElement</text></a></svg></div>

  a:hover text { fill: #0095DD; pointer-events: all;}

特性

This interface also inherits properties from its parent, SVGGeometryElement .

SVGCircleElement.cx 只读
SVGCircleElement.cy 只读
SVGCircleElement.r 只读

方法

This interface has no methods but inherits methods from its parent, SVGGeometryElement .

范例

SVG content

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 250 250" width="250" height="250">
  <circle cx="100" cy="100" r="50" fill="gold" id="circle"
      onclick="clickCircle();"/>
</svg>

JavaScript 内容

This function clickCircle() is called when the circle is clicked. It randomly increases or decreases the radius of the circle element.

function clickCircle() {
  var circle = document.getElementById("circle");
  // Randomly determine if the circle radius will increase or decrease
  var change = Math.random() > 0.5 ? 10 : -10;
  // Clamp the circle radius to a minimum of 10 and a maximum of 250,
  // so it won't disappear or get bigger than the viewport
  var newValue = Math.min(Math.max(circle.r.baseVal.value + change, 10), 250);
  circle.setAttribute("r", newValue);
}

Click on the circle.

规范

规范	状态	Comment
Scalable Vector Graphics (SVG) 2 The definition of 'SVGCircleElement' in that specification.	候选推荐	Replaced the inheritance from `SVGElement` , `SVGTests` , `SVGLangSpace` , `SVGExternalResourcesRequired` , `SVGStylable` ，和 `SVGTransformable` by `SVGGeometryElement`
Scalable Vector Graphics (SVG) 1.1 (Second Edition) The definition of 'SVGCircleElement' in that specification.	推荐	初始定义

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`SVGCircleElement`	Chrome 1	Edge 12	Firefox 1.5	IE 9	Opera 8	Safari 3.1	WebView Android 3	Chrome Android 18	Firefox Android 4	Opera Android Yes	Safari iOS 3.1	Samsung Internet Android 1.0
`cx`	Chrome Yes	Edge 12	Firefox Yes	IE ?	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes
`cy`	Chrome Yes	Edge 12	Firefox Yes	IE ?	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes
`r`	Chrome Yes	Edge 12	Firefox Yes	IE ?	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android Yes	Firefox Android Yes	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes

图例

完整支持
兼容性未知 ?

另请参阅

<circle> SVG element

元数据

最后修改： Jul 21, 2019

在此页

特性

方法

范例

SVG content

JavaScript 内容

规范

浏览器兼容性

图例

另请参阅

相关话题