files/en-us/web/api/svgfefloodelement/y/index.md
{{APIRef("SVG")}}
The y read-only property of the {{domxref("SVGFEFloodElement")}} interface describes the vertical coordinate of the position of an SVG filter primitive as a {{domxref("SVGAnimatedLength")}}.
It reflects the {{SVGAttr("y")}} 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 <percentage>. The <coordinate> is a length in the user coordinate system that is the given distance from the origin of the filter along the y-axis. If the y attribute is a percent value, the property value is relative to the height of the filter region in user coordinate system units. The default value is 0.
An {{domxref("SVGAnimatedLength")}}.
const feFlood = document.querySelector("feFlood");
const topPosition = feFlood.y;
console.log(topPosition.baseVal.value); // the `y` value
{{Specifications}}
{{Compat}}