The y read-only property of the SVGTextPositioningElement interface describes the y-axis coordinate of the SVGTextElement or SVGTSpanElement as an SVGAnimatedLengthList. It reflects the y attribute's vertical position of the individual text glyphs in the user coordinate system.
The attribute value is a list of <length>, <percentage>, or <number>. The numeric values in the SVGAnimatedLengthList.baseVal reflect the y-coordinates in the user coordinate system.
Given the following SVG:
<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
<text x="10" y="20">Hello</text>
<text x="50" y="50">World</text>
</svg>We can access the computed values of the y attributes:
const texts = document.querySelectorAll("text");
console.log(texts[0].y.baseVal[0].value); // output: 20
console.log(texts[1].y.baseVal[0].value); // output: 50