Edit fiddle - JSFiddle - React, Tailwind, and code Playground

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HTML

<svg id="root" width="100%" height="650px" >
    <g>
        <rect id="rec" x="17%" y="120" width="82%" height="150" style="fill:black;">
    </g>
</svg>

CoffeeScript

root = document.getElementById('root')
rec = document.getElementById('rec')
point = root.createSVGPoint()
# This is the top-left relative to the SVG element
ctm = rec.getCTM()
console.log point.matrixTransform(ctm)
# This is the top-left relative to the document
ctm = rec.getScreenCTM()
console.log point.matrixTransform(ctm)

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JSFiddle - React, Tailwind, and code Playground

HTML

CoffeeScript

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Use pre-released features

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