SVGCircleElement

The SVGCircleElement interface is an interface for the <circle> element.

Properties

This interface also inherits properties from its parent, SVGGeometryElement.

SVGCircleElement.cx Read only

This property defines the x-coordinate of the center of the <circle> element. It is denoted by the cx attribute of the element.

SVGCircleElement.cy Read only

This property defines the y-coordinate of the center of the <circle> element. It is denoted by the cy attribute of the element.

SVGCircleElement.r Read only

This property defines the radius of the <circle> element. It is denoted by the r of the element.

Methods

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

Example

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 content

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.

Specifications

Specification Status Comment
Scalable Vector Graphics (SVG) 2
The definition of 'SVGCircleElement' in that specification.
Candidate Recommendation Replaced the inheritance from SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, and SVGTransformable by SVGGeometryElement
Scalable Vector Graphics (SVG) 1.1 (Second Edition)
The definition of 'SVGCircleElement' in that specification.
Recommendation Initial definition

Browser Compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
SVGCircleElementChrome Full support 1Edge Full support YesFirefox Full support 1.5IE Full support 9Opera Full support 8Safari Full support 3.1WebView Android Full support 3Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support YesSafari iOS Full support 3.1Samsung Internet Android ?
cxChrome Full support YesEdge Full support 12Firefox Full support YesIE ? Opera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android ?
cyChrome Full support YesEdge Full support 12Firefox Full support YesIE ? Opera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android ?
rChrome Full support YesEdge Full support 12Firefox Full support YesIE ? Opera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown

See also