The x read-only property of the SVGSVGElement interface describes the horizontal coordinate of the position of that SVG as an SVGAnimatedLength. When an <svg> is nested within another <svg>, the horizontal coordinate is a length in the user coordinate system that is the given distance from the origin of the user coordinate system along the x-axis. Its syntax is the same as that for <length>.
It reflects the <svg> element's x geometric attribute. The default value is 0. The x attribute has no effect on outermost <svg> elements; only one nested ones. The CSS x property takes precedence over the <svg> element's x attribute, so the value may not reflect the element's appearance.
const svg = document.querySelector("svg");
const leftPosition = svg.x;
console.dir(leftPosition.baseVal.value); // the `x` value