files/en-us/web/api/svgfespotlightelement/pointsatz/index.md
{{APIRef("SVG")}}
The pointsAtZ read-only property of the {{domxref("SVGFESpotLightElement")}} interface reflects the {{SVGAttr("pointsAtZ")}} attribute of the given {{SVGElement("feSpotLight")}} element.
An {{domxref("SVGAnimatedNumber")}} object.
pointsAtZ attribute of the <feSpotLight> elementIn this example, we access the z location for the light source created by the <feSpotLight> SVG filter element in the SVG coordinate system by using the pointsAtZ read-only property of the SVGFESpotLightElement interface.
<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
<defs>
<filter id="specularLightingFilter">
<!-- Apply a specular light effect to the SourceGraphic -->
<feSpecularLighting
in="SourceGraphic"
specularExponent="20"
lighting-color="hotpink"
surfaceScale="30">
<feSpotLight
x="10"
y="50"
z="150"
pointsAtX="150"
pointsAtY="100"
pointsAtZ="0"
specularExponent="20" />
</feSpecularLighting>
</filter>
</defs>
<!-- A circle to display the effect of the lighting -->
<circle cx="100" cy="100" r="50" filter="url(#specularLightingFilter)" />
</svg>
// Select the feSpotLight element
const spotLightElement = document.querySelector("feSpotLight");
console.log(spotLightElement.pointsAtZ.baseVal); // Output: 0
{{Specifications}}
{{Compat}}