files/en-us/web/api/svgfedisplacementmapelement/in1/index.md
{{APIRef("SVG")}}
The in1 read-only property of the {{domxref("SVGFEDisplacementMapElement")}} interface reflects the {{SVGAttr("in")}} attribute of the given {{SVGElement("feDisplacementMap")}} element.
An {{domxref("SVGAnimatedString")}} object.
In this example, two {{SVGElement("feDisplacementMap")}} elements are defined in a filter, each with a different in attribute.
<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
<defs>
<filter id="filter1">
<!-- First Displacement Map -->
<feDisplacementMap in="SourceGraphic" scale="20">
<feFuncR type="table" tableValues="0 1" />
</feDisplacementMap>
<!-- Second Displacement Map -->
<feDisplacementMap in="BackgroundImage" scale="30">
<feFuncR type="table" tableValues="0.5 1" />
</feDisplacementMap>
</filter>
</defs>
<rect
x="20"
y="20"
width="100"
height="100"
fill="red"
filter="url(#filter1)" />
<circle cx="100" cy="100" r="50" fill="blue" filter="url(#filter1)" />
</svg>
We can access the in attribute:
const displacementMaps = document.querySelectorAll("feDisplacementMap");
console.log(displacementMaps[0].getAttribute("in")); // Output: "SourceGraphic"
console.log(displacementMaps[1].getAttribute("in")); // Output: "BackgroundImage"
{{Specifications}}
{{Compat}}