A data-* attribute on an <svg> tag attaches additional data to the svg image.
To create a custom attribute, replace * with a lowercase string, such as data-id
, data-status
, or data-location
.
A custom data-shape
attribute on an <svg> image.
The attribute value is not visible, but is readable by JavaScript.
<svg data-shape="Rectangle" width="300" height="100">
<rect width="300" height="100" fill="orangered" />
</svg>
The data-* attribute adds custom information to an <svg> element.
The * part is replaced with a lowercase string, such as data-id, data-cost, or data-location.
An <svg> element can have any number of data-* attributes, each with their own name.
Using data-* attributes reduces the need for requests to the server.
Note: The data-* attribute is not visible and does not change the appearance of the svg.
<svg data-*="value">
Note: The * can be any string, such as data-id
, data-cost
, data-supplier
, etc.
Value | Description |
---|---|
value | A string value. Can be numeric, alphanumeric, JSON, etc. |
A custom data-subject
attribute on an <svg> element.
Clicking the button will display the subject value.
<svg id="mysvg" data-subject="Simple rectangle" width="300" height="100">
<rect width="300" height="100" fill="orangered" />
</svg>
<br/><br/>
<button onclick="toggle();">Show data</button>
<script>
let toggle = () => {
let element = document.getElementById("mysvg");
alert("Subject = " + element.getAttribute('data-subject'));
}
</script>
The <svg> tag has a custom data-subject
attribute.
The shape of the svg is stored in the data-subject
.
Clicks are handled by the onclick
event.
Onclick invokes a JavaScript function that extracts and displays the <svg> subject.
Note: Notice how the shape displays immediately without server call.
Here is when data-* 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>