files/en-us/web/api/svgfegaussianblurelement/stddeviationy/index.md
{{APIRef("SVG")}}
The stdDeviationY read-only property of the {{domxref("SVGFEGaussianBlurElement")}} interface reflects the (possibly automatically computed) Y component of the {{SVGAttr("stdDeviation")}} attribute of the given {{SVGElement("feGaussianBlur")}} element.
An {{domxref("SVGAnimatedNumber")}} object.
stdDeviationY attribute<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
<defs>
<filter id="gaussian-blur-filter">
<!-- Apply Gaussian Blur with stdDeviationY set to 5 and stdDeviationY set to 10 -->
<feGaussianBlur
in="SourceGraphic"
stdDeviation="5 10"
result="blurred-graphic" />
</filter>
</defs>
<!-- Rectangle with a Gaussian blur effect -->
<rect
x="50"
y="50"
width="100"
height="100"
fill="hotpink"
filter="url(#gaussian-blur-filter)" />
</svg>
// Select the feGaussianBlur element
const gaussianBlur = document.querySelector("feGaussianBlur");
// Access the stdDeviationY value
console.log(gaussianBlur.stdDeviationY.baseVal); // Output: 10
{{Specifications}}
{{Compat}}