A data-* attribute on a <picture> tag attaches additional data to the picture.
To create a custom attribute, replace * with a lowercase string, such as data-id, data-status, or data-location.
A custom data-title attribute on a <picture> tag.
The attribute value is not visible, but it is readable by JavaScript.
<picture data-title="Portrait of Vincent Van Gogh">
<source media="(max-width: 520px)" srcset="/img/html/vangogh-sm.jpg">
<source media="(max-width: 768px)" srcset="/img/html/vangogh.jpg">
<img src="/img/html/vangogh-lg.jpg" alt="Vincent Van Gogh">
</picture>
The data-* attribute adds custom information to a <picture> element.
The * part is replaced with a lowercase string, such as data-id, data-cost, or data-location.
An <picture> 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 picture.
<picture 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-topic attribute on a <picture> tag.
Clicking the button will display the topic value.
<picture id="mypicture" data-topic="Self portrait by Vincent Van Gogh">
<source media="(max-width: 520px)" srcset="/img/html/vangogh-sm.jpg">
<source media="(max-width: 768px)" srcset="/img/html/vangogh.jpg">
<img src="/img/html/vangogh-lg.jpg" alt="Vincent Van Gogh">
</picture>
<br/><br/>
<button onclick="show();">Show data</button>
<script>
let show = () => {
let element = document.getElementById("mypicture");
alert("Topic = " + element.getAttribute('data-topic'));
}
</script>
The <picture> tag has a custom data-topic attribute.
The topic of the picture is stored in the data-topic.
Clicks are handled by the onclick event.
Onclick invokes a JavaScript function that extracts and displays the picture topic.
Note: Notice how the title displays immediately without server call.
Here is when data-* support started for each browser:
 Chrome
|
38.0 | Oct 2014 |
 Firefox
|
38.0 | May 2015 |
 IE/Edge
|
13.0 | Nov 2015 |
 Opera
|
25.0 | Oct 2014 |
 Safari
|
9.1 | Mar 2016 |
Back to <picture>
