SVG tspan incorrect position in Chrome/Edge but not in Firefox

Question

I am working with a SVG element which contains a text element with the following structure

    <g class="textGroup2">
          <text class="split0" x="640" y="80" dy="0" stroke="black">
            <tspan alignment-baseline="hanging" data-t="0" style="font-size: xx-large;">S</tspan>
            <tspan alignment-baseline="hanging" data-t="1" style="font-size: xx-large;">V</tspan>
            <tspan alignment-baseline="hanging" data-t="2" style="font-size: xx-large;">G</tspan>
          </text>
      </g>

I am trying to provide an x and y attribute to each of the tspan by doing this

    document.querySelectorAll('body > svg > g.textGroup2 > text[class^="split"]>tspan').forEach(
    (a, i) => {
        const dim = a.getStartPositionOfChar(0);
        a.setAttribute('x', `${dim.x}`);
        a.setAttribute('y', `${dim.y}`);
        a.removeAttribute('alignment-baseline');
    });

As a result, Firefox returns this,

whereas Chrome/Edge returns this

How can I make Chrome/Edge returns what Firefox returns, ie each tspan with x and constant y attribute? The full code is following

 document.querySelectorAll('body > svg > g.textGroup2 > text[class^="split"]>tspan').forEach( (a, i) => { const dim = a.getStartPositionOfChar(0); a.setAttribute('x', `${dim.x}`); a.setAttribute('y', `${dim.y}`); a.removeAttribute('alignment-baseline'); });

 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1280 720"> <rect class="vBoxRect" width="1280" height="720" fill="#EFEFEF"></rect> <g class="textGroup2"> <text class="split0" x="640" y="80" dy="0" stroke="black"> <tspan alignment-baseline="hanging" data-t="0" style="font-size: xx-large;">S</tspan> <tspan alignment-baseline="hanging" data-t="1" style="font-size: xx-large;">V</tspan> <tspan alignment-baseline="hanging" data-t="2" style="font-size: xx-large;">G</tspan> </text> </g> </svg>

Answer 1

The solution is to remove alignment-baseline="hanging" from <tspan/> or if you need this attribute initially, you can remove it in a loop before determining the position of <tspan/> .

 document.querySelectorAll('body > svg > g.textGroup2 > text[class^="split"]>tspan').forEach((a, i) => { a.removeAttribute('alignment-baseline'); const dim = a.getStartPositionOfChar(0); a.setAttribute('x', `${dim.x}`); a.setAttribute('y', `${dim.y}`); });

 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1280 720"> <rect class="vBoxRect" width="1280" height="720" fill="#EFEFEF"></rect> <g class="textGroup2"> <text class="split0" x="640" y="80" dy="0" stroke="black"> <tspan alignment-baseline="hanging" data-t="0" style="font-size: xx-large">S</tspan> <tspan alignment-baseline="hanging" data-t="1" style="font-size: xx-large">V</tspan> <tspan alignment-baseline="hanging" data-t="2" style="font-size: xx-large">G</tspan> </text> </g> </svg>