SVGFESpotLightElement: specularExponent property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The specularExponent read-only property of the SVGFESpotLightElement interface reflects the specularExponent attribute of the given <feSpotLight> element.
Value
An SVGAnimatedNumber object.
Examples
Accessing the specularExponent attribute of the <feSpotLight> element
In this example, we access the exponent value controlling the focus of the <feSpotLight> filter element's light source by using the specularExponent read-only property of the SVGFESpotLightElement interface.
html
<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="40"
lighting-color="hotpink"
surfaceScale="5">
<feSpotLight
x="100"
y="100"
z="50"
pointsAtX="100"
pointsAtY="100"
specularExponent="40" />
</feSpecularLighting>
</filter>
</defs>
<circle
cx="100"
cy="100"
r="50"
fill="lightblue"
filter="url(#specularLightingFilter)" />
</svg>
js
// Select the feSpotLight element
const spotLightElement = document.querySelector("feSpotLight");
// Access the specularExponent property
console.log(spotLightElement.specularExponent.baseVal); // Output: 40
Specifications
| Specification |
|---|
| Filter Effects Module Level 1 # dom-svgfespotlightelement-specularexponent |
Browser compatibility
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