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<!DOCTYPE html>
<html>
<head>
<title>scrapple</title>
<style>
svg, div{
width: 100%;
height: auto;
overflow: visible;
display: grid;
margin: auto;
justify-content: center;
}
svg path {
fill:transparent;
stroke:black;
stroke-width:3px;
}
svg text {
font-size:30px;
fill: brown;
}
</style>
</head>
<body>
<input id="the_text" type="text" value="envelope!" placeholder="Type text here...">
<div id="svg-target"></div>
<script>
const targetDiv = document.getElementById('svg-target');
const svgNode = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
targetDiv.appendChild(svgNode);
/*svgNode.setAttributeNS(null, 'viewBox', '0 0 100 100');*/
const svgPath = document.createElementNS('http://www.w3.org/2000/svg', 'path');
svgPath.setAttributeNS(null, 'id', 'svgpath');
svgPath.setAttributeNS(null, 'd', "M64 112c-8.8 0-16 7.2-16 16v22.1L220.5 291.7c20.7 17 50.4 17 71.1 0L464 150.1V128c0-8.8-7.2-16-16-16H64zM48 212.2V384c0 8.8 7.2 16 16 16H448c8.8 0 16-7.2 16-16V212.2L322 328.8c-38.4 31.5-93.7 31.5-132 0L48 212.2zM0 128C0 92.7 28.7 64 64 64H448c35.3 0 64 28.7 64 64V384c0 35.3-28.7 64-64 64H64c-35.3 0-64-28.7-64-64V128z");
svgNode.appendChild(svgPath);
const textNode = document.createElementNS('http://www.w3.org/2000/svg', 'text');
textNode.setAttributeNS(null, 'text-anchor', 'middle');
svgNode.appendChild(textNode);
const textPath = document.createElementNS('http://www.w3.org/2000/svg', 'textPath');
textPath.setAttributeNS(null, 'startOffset', '0%');
textPath.setAttributeNS(null, 'href', '#svgpath');
textPath.textContent = "envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope envelope!";
textNode.appendChild(textPath);
const animate = document.createElementNS('http://www.w3.org/2000/svg', 'animate');
animate.setAttributeNS(null, 'attributeName', 'startOffset');
animate.setAttributeNS(null, 'from', '-15%');
animate.setAttributeNS(null, 'to', '115%');
animate.setAttributeNS(null, 'begin', '0s');
animate.setAttributeNS(null, 'dur', '80s');
animate.setAttributeNS(null, 'repeatCount', 'indefinite');
textPath.appendChild(animate);
console.log(Object.entries(svgNode));
var input = document.getElementById('the_text');
input.addEventListener("input", updateValue);
function updateValue(e) {
textPath.textContent = (e.target.value);
textPath.appendChild(animate);
};
</script>
</body>
</html>
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