The result read-only property of the SVGFEConvolveMatrixElement interface describes the assigned name of an SVG filter primitive as a SVGAnimatedString.
It reflects the <feConvolveMatrix> element's result attribute. The <feConvolveMatrix> filter applies a matrix convolution effect, combining pixels in the input image with neighboring pixels to produce a convolution effect such as blurring, edge detection, sharpening, embossing or beveling.
The attribute value is a <custom-ident>. If supplied, then graphics that result from processing this filter primitive can be referenced by an in attribute on a subsequent filter primitive within the same <filter> element.
If no result attribute is defined, the filter's result.baseVal and result.animVal are empty strings, and the output of the <feConvolveMatrix> filter will only be available for re-use as the implicit input into the next filter primitive if that filter primitive provides no value for its in attribute.
const feConvolveMatrixElement = document.querySelector("feConvolveMatrix");
const filterName = feConvolveMatrixElement.result;
console.log(filterName.baseVal); // the filter's assigned nameSVGFEConvolveMatrixElement.in1<custom-ident> data type<filter> element, SVG filter attribute in SVG