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Like my title says, I'm trying to programmatically creating an SVG image element in a HTML page using javascript. For some reason my basic javascript code isn't working, however if I use the raphaeljs library it works fine. So there's obviously a problem with my js - I just can't seem to figure out what it is.
(note: the target browser is FF4+)
Here is the basic page with an html version of what I'm trying to achieve up the top:
<html>
<head>
<script type="text/javascript" src="http://raphaeljs.com/raphael.js"></script>
</head>
<body>
<svg
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink"
id="test1"
height="200px"
width="200px">
<image
id="testimg1"
xlink:href="http://i.imgur.com/LQIsf.jpg"
width="100"
height="100"
x="0"
y="0"/>
</svg>
<hr />
<p id="testP1">
</p>
<hr />
<p id="testP2">
</p>
</body>
</html>
And here is my javascript:
var paper = Raphael(document.getElementById("testP1"), 200, 200);
paper.image("http://i.imgur.com/LQIsf.jpg", 0,0, 100, 100);
var svg = document.createElementNS('http://www.w3.org/2000/svg','svg');
svg.setAttributeNS('http://www.w3.org/2000/svg','xlink','http://www.w3.org/1999/xlink');
svg.setAttributeNS('http://www.w3.org/2000/svg','height','200');
svg.setAttributeNS('http://www.w3.org/2000/svg','width','200');
svg.setAttributeNS('http://www.w3.org/2000/svg','id','test2');
var svgimg = document.createElementNS('http://www.w3.org/2000/svg','image');
svgimg.setAttributeNS('http://www.w3.org/2000/svg','height','100');
svgimg.setAttributeNS('http://www.w3.org/2000/svg','width','100');
svgimg.setAttributeNS('http://www.w3.org/2000/svg','id','testimg2');
svgimg.setAttributeNS('http://www.w3.org/1999/xlink','href','http://i.imgur.com/LQIsf.jpg');
svgimg.setAttributeNS('http://www.w3.org/2000/svg','x','0');
svgimg.setAttributeNS('http://www.w3.org/2000/svg','y','0');
svg.appendChild(svgimg);
document.querySelector('#testP2').appendChild(svg);
Live example: http://jsfiddle.net/Yansky/UVFBj/5/
202
Like HTML, SVGs are represented using the Document Object Model (DOM) and so can be manipulated with Javascript relatively easily, especially if you are familiar with using JS with HTML. All the code examples can be found by following the Github link at the top of this post.
SVGs are considered to be more accessible as they support text, and canvas is dependent on Javascript. So, the event that the browser does not support SVG but still text can be displayed. If Javascript has been disabled, then the device cannot be able to interpret the javascript output.
SVG elements are actually of type HTMLElement .
SVG native attributes (not including xlink:href) do not share the SVG namespace; you can either use just setAttribute instead of setAttributeNS, or use
svgimg.setAttributeNS(null,'x','0');
for example.
Here it is, working: http://jsfiddle.net/UVFBj/8/
Note that I changed your fiddle to properly use XHTML, so that SVG works nicely within it in all major browsers.
161
For futher reference.
I've been using the function bellow to create SVG elements and it was failing to create images because of xlink:href must be created using setAtributeNS.
The code bellow is corrected to do that (create any svg element on the fly)
function makeSVG(parent, tag, attrs) {
var el= document.createElementNS('http://www.w3.org/2000/svg', tag);
for (var k in attrs){
if(k=="xlink:href"){
el.setAttributeNS('http://www.w3.org/1999/xlink', 'href', attrs[k]);
}else{
el.setAttribute(k, attrs[k]);
}
}
}
Sample usage:
makeSVG('#map-tiles', 'image', { class:'map-tile', 'xlink:href':'map/xxx.jpg', width:'512px', height: '512px' x:'0', y:'0'});
The parent is used to organize 'layers' on svg groups tag.
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