files/en-us/web/api/svgfedropshadowelement/dx/index.md
{{APIRef("SVG")}}
The dx read-only property of the {{domxref("SVGFEDropShadowElement")}} interface reflects the {{SVGAttr("dx")}} attribute of the given {{SVGElement("feDropShadow")}} element.
An {{domxref("SVGAnimatedNumber")}} object.
dx valueIn this example, we retrieve the horizontal shift of the <feDropShadow> by using the dx read-only property of the SVGFEDropShadowElement interface.
<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
<defs>
<filter id="drop-shadow-filter">
<!-- Drop Shadow with dx property set to 10 -->
<feDropShadow
in="SourceGraphic"
dx="10"
dy="10"
stdDeviation="5"
flood-color="red" />
</filter>
</defs>
<!-- Rectangle with a red shadow -->
<rect
x="20"
y="20"
width="100"
height="100"
fill="red"
filter="url(#drop-shadow-filter)" />
<!-- Circle with a red shadow -->
<circle
cx="100"
cy="100"
r="50"
fill="blue"
filter="url(#drop-shadow-filter)" />
</svg>
const dropShadow = document.querySelector("feDropShadow");
console.log(dropShadow.dx.baseVal); // Output: 10
{{Specifications}}
{{Compat}}