W3cubDocs

/Web APIs

SVGFESpecularLightingElement: specularConstant 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 specularConstant read-only property of the SVGFESpecularLightingElement interface reflects the specularConstant attribute of the given <feSpecularLighting> element.

Value

An SVGAnimatedNumber object.

Examples

Accessing the `specularConstant` Property

<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
  <defs>
    <filter id="specularLightingFilter">
      <!-- Applies specular lighting with a constant specular reflectance -->
      <feSpecularLighting
        in="SourceGraphic"
        specularConstant="0.5"
        lighting-color="hotpink">
        <fePointLight x="50" y="50" z="30" />
      </feSpecularLighting>
    </filter>
  </defs>
  <rect
    x="20"
    y="20"
    width="100"
    height="100"
    fill="lightblue"
    filter="url(#specularLightingFilter)" />
</svg>

// Select the feSpecularLighting element
const specularLightingElement = document.querySelector("feSpecularLighting");

// Access the specularConstant property
console.log(specularLightingElement.specularConstant.baseVal); // Output: 0.5

Specifications

Specification
Filter Effects Module Level 1> # dom-svgfespecularlightingelement-specularconstant>

Browser compatibility

	Desktop					Mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	WebView on iOS
`specularConstant`	5	12	3	≤12.1	6	18	4	≤12.1	6	1.0	4.4	6