A data-* attribute on an <img> tag attaches additional data to the image.
To create a custom attribute, replace * with a lowercase string, such as data-id, data-status, or data-location.
A custom data-price attribute on an <img>.
The attribute value is not visible, but it is readable by JavaScript.
<img src="/img/html/vangogh.jpg"
data-price="60 million USD">
The data-* attribute allows you to add custom attributes to a <img> element.
The * part is replaced with a lowercase string, such as data-id, data-cost, or data-location.
An <img> element can have any number of data-* attributes, each with their own name.
These attributes usually store additional data about the img (e.g. id, options, variations, etc.).
Using data-* attributes reduces the need for Ajax requests to the server.
Note: The data-* attribute does not change the appearance of the img tag in any way.
<img 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 an <img> element.
Clicking the button will display the topic value.
<img id="myimg"
src="/img/html/vangogh.jpg"
data-topic="Van Gogh self-portrait">
<br/><br/>
<button onclick="show();">Show data</button>
<script>
let show = () => {
let element = document.getElementById("myimg");
alert("Topic = " + element.getAttribute('data-topic'));
}
</script>
The <img> tag below contains the data-topic attribute.
The data-topic attribute specifies the topic of the <img>.
Clicks are handled by the onclick event.
Onclick invokes a JavaScript function that extracts and displays the image topic.
Note: Notice how the title will displays immediately without server call.
Here is when data-* support started for each browser:
 Chrome
|
1.0 | Sep 2008 |
 Firefox
|
1.0 | Sep 2002 |
 IE/Edge
|
1.0 | Aug 1995 |
 Opera
|
1.0 | Jan 2006 |
 Safari
|
1.0 | Jan 2003 |
Back to <img>
