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I want to create a rectangle inside an HTML page, then write some text on that rectangle. I also need that text to be a hyperlink. This is what I did but it is not working:

    <!DOCTYPE html>
<html>
<body>

<script>

    var svg   = document.documentElement;
    var svgNS = svg.namespaceURI;

    var rect = document.createElementNS(svgNS,'rect');
    rect.setAttribute('x',5);
    rect.setAttribute('y',5);
    rect.setAttribute('width',500);
    rect.setAttribute('height',500);
    rect.setAttribute('fill','#95B3D7');
    svg.appendChild(rect);
    document.body.appendChild(svg);

    var h=document.createElement('a');
    var t=document.createTextNode('Hello World');
    h.appendChild(t);
    document.body.appendChild(h);


</script>

</body>
</html>

Can you help please? Thanks.

I want to create a rectangle inside an HTML page, then write some text on that rectangle. I also need that text to be a hyperlink. This is what I did but it is not working:

    <!DOCTYPE html>
<html>
<body>

<script>

    var svg   = document.documentElement;
    var svgNS = svg.namespaceURI;

    var rect = document.createElementNS(svgNS,'rect');
    rect.setAttribute('x',5);
    rect.setAttribute('y',5);
    rect.setAttribute('width',500);
    rect.setAttribute('height',500);
    rect.setAttribute('fill','#95B3D7');
    svg.appendChild(rect);
    document.body.appendChild(svg);

    var h=document.createElement('a');
    var t=document.createTextNode('Hello World');
    h.appendChild(t);
    document.body.appendChild(h);


</script>

</body>
</html>

Can you help please? Thanks.

  • javascript
  • html
  • svg
Share Improve this question edited Dec 12, 2013 at 9:57 Erik Dahlström 60.9k12 gold badges122 silver badges139 bronze badges asked Dec 12, 2013 at 9:08 user2746087user2746087 1,1292 gold badges8 silver badges6 bronze badges 1
  • 1 Possible duplicate of Create SVG tag with JavaScript – Zeimyth Commented May 29, 2016 at 14:24
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4 Answers 4

Reset to default 151

Change

var svg   = document.documentElement;

to

var svg = document.createElementNS("http://www.w3.org/2000/svg", "svg");

so that you create a SVG element.

For the link to be an hyperlink, simply add a href attribute :

h.setAttributeNS(null, 'href', 'http://www.google.com');

Demonstration

To facilitate svg editing you can use an intermediate function:

function getNode(n, v) {
  n = document.createElementNS("http://www.w3.org/2000/svg", n);
  for (var p in v)
    n.setAttributeNS(null, p, v[p]);
  return n
}

Now you can write:

svg.appendChild( getNode('rect', { width:200, height:20, fill:'#ff0000' }) );

Example (with an improved getNode function allowing camelcase for property with dash, eg strokeWidth > stroke-width):

function getNode(n, v) {
  n = document.createElementNS("http://www.w3.org/2000/svg", n);
  for (var p in v)
    n.setAttributeNS(null, p.replace(/[A-Z]/g, function(m, p, o, s) { return "-" + m.toLowerCase(); }), v[p]);
  return n
}

var svg = getNode("svg");
document.body.appendChild(svg);

var r = getNode('rect', { x: 10, y: 10, width: 100, height: 20, fill:'#ff00ff' });
svg.appendChild(r);

var r = getNode('rect', { x: 20, y: 40, width: 100, height: 40, rx: 8, ry: 8, fill: 'pink', stroke:'purple', strokeWidth:7 });
svg.appendChild(r);

Add this to html:

<svg id="mySVG" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"/>

Try this function and adapt for you program:

var svgNS = "http://www.w3.org/2000/svg";  

function createCircle()
{
    var myCircle = document.createElementNS(svgNS,"circle"); //to create a circle. for rectangle use "rectangle"
    myCircle.setAttributeNS(null,"id","mycircle");
    myCircle.setAttributeNS(null,"cx",100);
    myCircle.setAttributeNS(null,"cy",100);
    myCircle.setAttributeNS(null,"r",50);
    myCircle.setAttributeNS(null,"fill","black");
    myCircle.setAttributeNS(null,"stroke","none");

    document.getElementById("mySVG").appendChild(myCircle);
}

Elements can easily be added using the fragment.

  • DocumentFragment
  • Range.createContextualFragment()

Example

<input style="width:300px" type="text" placeholder="Input something to change the text." /><br>
<script>
const frag = document.createRange().createContextualFragment(`
<svg width="250" height="250">
  <rect x="0" y="0" width="250" height="250" fill="#95B3D7"></rect>
  <a href="https://www.google.com" style="cursor: pointer" target="_blank">
    <text x="10" y="130" style="
      font-size: 48px;
      fill:#faff00;">
      Hello world</text>
  </a>
</svg>
      `)
      const textElem = frag.querySelector("text")
      document.querySelector("input").onchange = (e) => {
        textElem.textContent = e.target.value
      }
      document.body.append(frag)
</script>

本文标签： Creating SVG elements dynamically with javascript inside HTMLStack Overflow

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