Svg.defs

The Svg.defs property holds a Defs object that holds the contents of the defs section of the SVG document.

Signature

Defs svg.defs = {
  list = {
    buttonhole: `<g id="buttonhole" transform="scale(1)">
      <path class="mark" d="M -1,-5 L 1,-5 L 1,5 L -1,5 z"></path>
    </g>`,
  },
}

Result:

<defs>
  <g id="buttonhole" transform="scale(1)">
    <path class="mark" d="M -1,-5 L 1,-5 L 1,5 L -1,5 z"></path>
  </g>
</defs>