files/en-us/web/api/svgellipseelement/cx/index.md
{{APIRef("SVG")}}
The cx read-only property of the {{domxref("SVGEllipseElement")}} interface describes the x-axis coordinate of the center of the ellipse as an {{domxref("SVGAnimatedLength")}}. It reflects the computed value of the {{SVGAttr("cx")}} attribute on the {{SVGElement("ellipse")}} element.
The attribute value is a <length>, <percentage>, or <number>. The numeric value of the {{domxref("SVGAnimatedLength.baseVal")}} is the x-coordinate of the ellipse's center in the user coordinate system.
An {{domxref("SVGAnimatedLength")}}.
Given the following SVG:
<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
<ellipse cx="50" cy="75" rx="30" ry="20" fill="blue" />
<ellipse cx="25%" cy="50%" rx="10%" ry="5%" fill="red" />
</svg>
We can access the computed values of the cx attributes:
const ellipses = document.querySelectorAll("ellipse");
const cxPos0 = ellipses[0].cx;
const cxPos1 = ellipses[1].cx;
console.dir(cxPos0.baseVal.value); // output: 50
console.dir(cxPos1.baseVal.value); // output: 50 (25% of 200)
{{Specifications}}
{{Compat}}