<svg xmlns="http://www.w3.org/2000/svg"
     xmlns:html="http://www.w3.org/1999/xhtml">
  <title>TextPath path-length with display:none path</title>
  <metadata>
    <html:link rel="author" title="Virali Purbey" href="mailto:viralipurbey@microsoft.com"/>
    <html:link rel="help" href="https://w3c.github.io/svgwg/svg2-draft/paths.html#PathLengthAttribute"/>
    <html:link rel="help" href="https://w3c.github.io/svgwg/svg2-draft/text.html#TextPathElement"/>
    <html:link rel="match" href="textpath-pathlength-css-display-none-ref.tentative.svg"/>
  </metadata>

  <style>
    text { font-family: sans-serif; font-size: 20px; fill: black; }
  </style>

  <defs>
    <path id="path1" d="M10 60 L210 60" style="display:none; path-length:10px"/>
  </defs>

  <text>
     <textPath href="#path1" startOffset="5">X</textPath>
  </text>
</svg>