SVGCircleElement

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

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.

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

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.

• <circle> SVG element