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Сообщение от Vad0k
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Можно только рекурсией к родительскому элементу получить.
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Я подобные задачи решал не через рекурсию, вот пример может и вам подойдет.
<head>
<script type="text/javascript">
function test(){
let svgns = "http://www.w3.org/2000/svg";
let svg = document.getElementsByClassName('canvas-svg')[0];
let elm_g = document.getElementById("circle");
let CTM = svg.getScreenCTM();
let elm_g_pos_x = (elm_g.getBoundingClientRect().left - CTM.e) / CTM.a;
let path_x = document.createElementNS(svgns, "path");
path_x.setAttributeNS(null, "d", "M"+elm_g_pos_x+",0 v1000");
path_x.setAttributeNS(null, "fill", "transparent");
path_x.setAttributeNS(null, "stroke", "black");
svg.appendChild(path_x);
let elm_g_pos_y = (elm_g.getBoundingClientRect().top - CTM.f) / CTM.d;
let path_y = document.createElementNS(svgns, "path");
path_y.setAttributeNS(null, "d", "M0,"+elm_g_pos_y+" h1000");
path_y.setAttributeNS(null, "fill", "transparent");
path_y.setAttributeNS(null, "stroke", "black");
svg.appendChild(path_y);
let elm_g_pos_cx = elm_g_pos_x + elm_g.getAttributeNS(null, "r") * 1;
let path_cx = document.createElementNS(svgns, "path");
path_cx.setAttributeNS(null, "d", "M"+elm_g_pos_cx+",0 v1000");
path_cx.setAttributeNS(null, "fill", "transparent");
path_cx.setAttributeNS(null, "stroke", "black");
path_cx.setAttributeNS(null, "stroke-dasharray", "4");
svg.appendChild(path_cx);
let elm_g_pos_cy = elm_g_pos_y + elm_g.getAttributeNS(null, "r") * 1;
let path_cy = document.createElementNS(svgns, "path");
path_cy.setAttributeNS(null, "d", "M0,"+elm_g_pos_cy+" h1000");
path_cy.setAttributeNS(null, "fill", "transparent");
path_cy.setAttributeNS(null, "stroke", "black");
path_cy.setAttributeNS(null, "stroke-dasharray", "4");
svg.appendChild(path_cy);
}
window.onload = test;
</script>
</head>
<body>
<svg width="100%" height="100%" viewBox="0 0 1000 1000" preserveAspectRatio="xMidYMin slice" x="0" y="0" class="canvas-svg" tabindex="1">
<g transform="translate(100 100)">
<g transform="translate(100 100)">
<circle id="circle" r="50" cx="25" cy="25" fill="yellow" />
</g>
</g>
<svg>
</body>
