Push SVG String into Dom?
Question
I have a javascript variable that basically looks like this:
my_svg_image = '<circle cx="227.58331298828125" cy="102" r="3" style="fill:black;stroke-width:0" />';
It was loaded from my database. Is there a way I can parse that string and add it to the DOM with Javascript? I have svgweb set up, but don't see how I can get it to parse this string. Are there other libraries that might help?
2 answers
solution1
3 2010-06-16 05:47:33
have you tried javascript's innerHTML property?
edit: You can only use innerHTML property for html elements, so you can use a string containing a whole svg image to add it to an html element. But you cannot add a svg element to an existing svg element.
Example:
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN"
"http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:svg="http://www.w3.org/2000/svg">
<head>
<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=UTF-8"/>
<script type="text/javascript">
<![CDATA[
function test() {
var newsvg = document.getElementById("svg-wrapper");
var svgstr = '<svg:svg height="300" width="700" id="svg-container"><svg:circle cx="150px" cy="100px" r="30px" /></svg:svg>';
newsvg.innerHTML = svgstr;
}
]]>
</script>
<title>SVG DOM</title>
</head>
<body>
<div id="svg-wrapper"></div>
<input type="button" onclick="javascript:test();" value="generate svg"/><br/>
</body>
</html>
If you want to add a circle to existing inline SVG, you have to add it using DOM methods (and the prbably first parse your string to extract the needed attribute values).
solution2
1 2014-09-27 03:48:20
I was recently looking for something similar to this, but I needed to update part of an existing SVG, so using innerHTML wasn't an option for me. I ended up taking a look at how Canvg pulls it off and came up with this:
var $contentToReplace = $('svg .some-class');
$contentToReplace.empty();
var content = new DOMParser().parseFromString(newContent, 'text/xml');
// content.children is an HTMLCollection, so using Array.prototype.slice to make a copy. if you
// don't make a copy, items will be removed from content.children each time appendChild is called,
// which will mess up the loop iteration
var children = Array.prototype.slice.call(content.children);
for (var i = 0; i < children.length; i++) {
$contentToReplace.get(0).appendChild(children[i]);
}
You can check out how they did it in Canvg - just search for the parseXml method.
You can also pass in different MIME types to the parseFromString method. The browser support on those varies a bit though - for example, the 'image/svg+xml' MIME type isn't supported in IE9 or earlier.
Changing the MIME type just changes what type of document you get back. Using 'text/xml' gives back an XMLDocument, which appears to work fine in this case.
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