r - Web APIs 编辑

The r read-only property of the SVGCircleElement interface reflects the r attribute of a <circle> element and by that defines the radius of the circle. If unspecified, the effect is as if the value is set to 0.

Syntax

var radius = element.r;

Value

An SVGAnimatedLength representing the radius of the circle.

Example

SVG

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" width="200" height="200">
  <circle r="50" r="50" r="50" fill="gold" id="circle"/>
</svg>

JavaScript

const circle = document.getElementById('circle');
console.log(circle.r);

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• SVGCircleElement.cx
• SVGCircleElement.cy