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"
    style="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

BCD tables only load in the browser

See also