An id on an <svg> tag assigns an identifier to the svg element.
The identifier must be unique across the page.
An id attribute on a <svg> element.
<svg id="circle-svg" width="100" height="100">
<circle cx="50" cy="50" r="40" stroke="steelblue"
stroke-width="2" fill="lightblue" />
</svg>
The id attribute assigns an identifier to the <svg> element.
The id allows JavaScript to easily access the <svg> element.
It is also used to point to a specific id selector in a style sheet.
Tip: id is a global attribute that can be applied to any HTML element.
<svg id="identifier" />
| Value | Description |
|---|---|
| identifier | A unique alphanumeric string. The id value must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens (-), underscores (_), colons (:), and periods (.). |
An <svg> element with a unique id attribute.
Clicking the button displays the content of the element.
<svg id="mysvg" width="100" height="100">
<circle cx="50" cy="50" r="40" stroke="steelblue"
stroke-width="2" fill="lightblue" />
</svg>
<br /><br />
<button onclick="show();">Show svg content</button>
<script>
let show = () => {
let element = document.getElementById("mysvg");
alert("Content = " + element.innerHTML);
}
</script>
The id attribute assigns a unique identifier for the <svg>.
Clicking the button calls JavaScript which locates the <svg> using the id.
Finally, the content of the <svg> element is displayed in an alert box.
Here is when id support started for each browser:
 Chrome
|
4.0 | Jan 2010 |
 Firefox
|
3.0 | Jun 2008 |
 IE/Edge
|
9.0 | Mar 2011 |
 Opera
|
10.1 | Jun 2010 |
 Safari
|
3.2 | Nov 2008 |
Back to <svg>
