The dataset read-only property of the SVGElement interface provides read/write access to custom data attributes (data-*) on elements. It exposes a map of strings (DOMStringMap) with an entry for each data-* attribute.
For more information on the behavior of dataset, see HTMLElement.dataset.
A DOMStringMap.
<div>
<svg viewBox="0 0 120 30" xmlns="http://www.w3.org/2000/svg">
<text x="20" y="20" id="user" data-id="1234567890" data-user="carinaanand">
Carina Anand
</text>
</svg>
</div>const el = document.querySelector("#user");
console.log(el.dataset.id); // "1234567890"data-* SVG attributes