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cshotton/svgviewer.html

Created February 1, 2023 12:54
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One page app to view SVG source as image and PNG download
Raw
svgviewer.html
<html>
<head>
<title>myByways SVG to PNG Converter</title>
</head>
<body bgcolor="#E6E6FA">
<h1><a href="http://mybyways.com/blog/convert-svg-to-png-using-your-browser">myByways SVG to PNG Converter</a></h1>
<textarea id="t" rows="8" cols="70"></textarea><br/><br/>
<button id="l">Load SVG</button><br/><br/>
<div id="d"></div><br/>
Width: <input id="w" type="number" max="9999"></input>
Height: <input id="h" type="number" max="9999"></input><br/>
<button id="s">Save SVG as PNG</button><br/><br/>
<canvas id="c"></canvas>
<script>
/* SVG to PNG (c) 2017 CY Wong / myByways.com */
var text = document.getElementById('t');
text.wrap = 'off';
var svg = null;
var width = document.getElementById('w');
var height = document.getElementById('h');
document.getElementById('l').addEventListener('click', function () {
var div = document.getElementById('d');
div.innerHTML= text.value;
svg = div.querySelector('svg');
width.value = svg.getBoundingClientRect().width;
height.value = svg.getBoundingClientRect().height;
});
document.getElementById('s').addEventListener('click', function () {
var canvas = document.getElementById('c');
svg.setAttribute('width', width.value);
svg.setAttribute('height', height.value);
canvas.width = width.value;
canvas.height = height.value;
var data = new XMLSerializer().serializeToString(svg);
var win = window.URL || window.webkitURL || window;
var img = new Image();
var blob = new Blob([data], { type: 'image/svg+xml' });
var url = win.createObjectURL(blob);
img.onload = function () {
canvas.getContext('2d').drawImage(img, 0, 0);
win.revokeObjectURL(url);
var uri = canvas.toDataURL('image/png').replace('image/png', 'octet/stream');
var a = document.createElement('a');
document.body.appendChild(a);
a.style = 'display: none';
a.href = uri
a.download = (svg.id || svg.svg.getAttribute('name') || svg.getAttribute('aria-label') || 'untitled') + '.png';
a.click();
window.URL.revokeObjectURL(uri);
document.body.removeChild(a);
};
img.src = url;
});
</script>
</body>
</html>
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