The values read-only property of the SVGFEColorMatrixElement interface reflects the values attribute of the given element.
An SVGAnimatedNumberList object.
values property<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
<filter id="color-matrix-filter">
<feColorMatrix
type="matrix"
values="1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0" />
</filter>
<rect
x="20"
y="20"
width="100"
height="100"
fill="red"
filter="url(#color-matrix-filter)" />
</svg>const colorMatrix = document.querySelector("feColorMatrix");
console.dir(colorMatrix.values.baseVal); // Output: SVGAnimatedNumberList object