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I have a SVG document where three circles are drawn:
<?xml version="1.0"?>
<svg width="450" height="80" xmlns="http://www.w3.org/2000/svg">
<script>
document.fillCircle = function(id) {
var circles = document.getElementsByTagName('circle'),
circle = document.getElementById(id);
[].forEach.call(circles, function(circle) {
circle.setAttribute('fill','#ffffff');
});
circle.setAttribute('fill', '#000000');
}
</script>
<g>
<line y1="35" x1="35" y2="35" x2="375" stroke-width="3" stroke="#000000"/>
<circle id="state1" r="30" cy="35" cx="35" stroke-width="3" stroke="#000000" fill="#ffffff" onclick="fillCircle(this.id);"/>
<circle id="state2" r="30" cy="35" cx="205" stroke-width="3" stroke="#000000" fill="#ffffff" onclick="fillCircle(this.id);"/>
<circle id="state3" r="30" cy="35" cx="375" stroke-width="3" stroke="#000000" fill="#ffffff" onclick="fillCircle(this.id);"/>
</g>
</svg>
For testing purposes I have the onclick="" method, but actually this document is an object in my html document:
<object id="test" data="test-vector.svg" width="100px" height="100px"></object>
I have a dataset and these three circles show the "progress" of every item. I regularly update the JSON set by pulling the new list from the server. For every item changed, I want to update the filled circle.
I would like to update the svg based on some javascript. However, I can't make it to get into the DOM of the SVG. I do not really care if the fillCircle() is inside the svg or not and if I have to use <embed>, <object> or something else, but this kind of javascript does not work for me.
<html>
<body>
<object id="test" data="test-vector.svg"></object>
<script>
var svg = document.getElementById('test');
console.log(svg);
svg.fillCircle('state2');
</script>
</body>
</html>
I tried several things I found on SO, like this one and this one, but whatever I test, the exception is always:
Uncaught TypeError: Object #<HTMLObjectElement> has no method 'fillCircle'
962
var object = document.getElementById("test") will get you the object element but you can't call that till the object has loaded. Once you have that you can use object.contentDocument to do things with the embedded svg document.
<html>
<body>
<object id="test" data="test-vector.svg" onload="f()" ></object>
<script>
function f() {
var svg = document.getElementById('test');
svg.contentDocument.fillCircle('state2');
}
</script>
</body>
</html>
Why don't you embed the SVG directly in your HTML code (using SVG tags)? According to W3, this works in all modern browsers (and IE >= 9). Accessing and changing the circles' properties with JS is then trivial...
<html>
<body>
<svg>...</svg>
</body>
</html>
If you want to keep your HTML/SVG structure though, you can do the following:
var svg = document.getElementById("test");
svg.onload = function(){
svg.contentDocument.fillCircle("state2");
};
The trick is to wait for the SVG object to load (onload event); not till then you can safely use the contentDocument property. Btw, this is also described in this solution on SO (you posted a link to it). ;)
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