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<!DOCTYPE html>
<!--
SPDX-FileCopyrightText: Chris Pressey, the original author of this work, has dedicated it to the public domain.
For more information, please refer to <https://unlicense.org/>
SPDX-License-Identifier: Unlicense
-->
<head>
  <meta charset="utf-8">
  <title>Dynamically-generated SVG</title>
</head>
<body>

<h1>Dynamically-generated SVG</h1>

<div id="container"></div>

</body>
<script>

var elem = document.getElementById('container');

var svg = document.createElementNS("http://www.w3.org/2000/svg", "svg");

var rect = document.createElementNS(svg.namespaceURI, "rect");
rect.setAttribute("id", "rect");
rect.setAttribute("x", 100);
rect.setAttribute("y", 100);
rect.setAttribute("width", 500);
rect.setAttribute("height", 200);
rect.setAttribute("fill", '#603020');
svg.appendChild(rect);
rect.onclick = function(e) {
    rect.setAttribute("fill", "yellow");
};

var circ = document.createElementNS(svg.namespaceURI, "circle");
circ.setAttribute("id", "circ");
circ.setAttribute("cx", 100);
circ.setAttribute("cy", 100);
circ.setAttribute("r", 50);
circ.setAttribute("fill", "black");
circ.setAttribute("stroke", "white");
svg.appendChild(circ);
circ.onclick = function(e) {
    circ.setAttribute("r", circ.getAttribute("r") - 5);
};

elem.appendChild(svg);
svg.style.height = "300px"; // otherwise, shapes get chopped off; 100px seems to be the default
//svg.style.overflow = "scroll";  // no workie

</script>