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

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

    <g >
          <text  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, i.e. 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  width="1280" height="720" fill="#EFEFEF"></rect>
      <g >
          <text  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>

CodePudding user response：

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  width="1280" height="720" fill="#EFEFEF"></rect>
  <g >
    <text  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>