The href read-only property of the SVGUseElement interface reflects the href or xlink:href attribute of the given element.
An SVGAnimatedString object.
Given the following SVG:
<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
<defs>
<circle id="circle1" cx="50" cy="50" r="40" fill="blue" />
<circle id="circle2" cx="50" cy="50" r="40" fill="red" />
</defs>
<use href="#circle1" x="50" y="50" />
<use href="#circle2" x="100" y="50" />
</svg>We can access the href attribute of the <use> elements:
const uses = document.querySelectorAll("use");
console.log(uses[0].href.baseVal); // output: "#circle1"
console.log(uses[1].href.baseVal); // output: "#circle2"