files/en-us/web/api/svgfefloodelement/width/index.md
{{APIRef("SVG")}}
The width read-only property of the {{domxref("SVGFEFloodElement")}} interface describes the horizontal size of an SVG filter primitive as a {{domxref("SVGAnimatedLength")}}.
It reflects the {{SVGAttr("width")}} attribute of the {{SVGElement("feFlood")}} element, which fills an SVG filter subregion with the color and opacity defined by {{SVGAttr("flood-color")}} and {{SVGAttr("flood-opacity")}}. The attribute is a <length> or a <percentage> relative to the width of the filter region. The default value is 100%. The property value is a length in user coordinate system units.
An {{domxref("SVGAnimatedLength")}}.
const feFlood = document.querySelector("feFlood");
const horizontalSize = feFlood.width;
console.log(horizontalSize.baseVal.value); // the `width` value
{{Specifications}}
{{Compat}}