The height read-only property of the SVGFEColorMatrixElement interface describes the vertical size of an SVG filter primitive as a SVGAnimatedLength.
It reflects the <feColorMatrix> element's height filter primitive attribute. The <feColorMatrix> filter applies a matrix transformation on the RGB color and alpha values.
The attribute is a <length> or a <percentage> relative to the height of the filter region. The default value is 100%. The property value is a length in user coordinate system units.
const feColorMatrix = document.querySelector("feColorMatrix");
const verticalSize = feColorMatrix.height;
console.log(verticalSize.baseVal.value); // the `height` valueSVGFEColorMatrixElement.width<blend-mode> data typemix-blend-mode property<filter> element, SVG filter attribute in SVG