files/en-us/web/api/svgfemergenodeelement/in1/index.md
{{APIRef("SVG")}}
The in1 read-only property of the {{domxref("SVGFEMergeNodeElement")}} interface reflects the {{SVGAttr("in")}} attribute of the given {{SVGElement("feMergeNode")}} element.
An {{domxref("SVGAnimatedString")}} object.
in Property of feMergeNode Element<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
<defs>
<filter id="mergeFilter">
<!-- Merges two inputs -->
<feMerge>
<feMergeNode in="SourceGraphic" />
<feMergeNode in="BackgroundImage" />
</feMerge>
</filter>
</defs>
<rect
x="20"
y="20"
width="100"
height="100"
fill="lightblue"
filter="url(#mergeFilter)" />
</svg>
We can access the in attribute of the feMergeNode element.
// Select the first feMergeNode element
const mergeNode = document.querySelector("feMergeNode");
console.log(mergeNode.in1.baseVal); // Output: "SourceGraphic"
{{Specifications}}
{{Compat}}