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

BCD tables only load in the browser

See also