HTML <div> data-* Attribute

The data-* attribute on a <div> tag attaches additional data to the div element. To create a custom attribute, replace the * with a lowercase string, such as data-id, data-status, or data-location.

Example

#

A custom data-registration-number attribute on a <div>.
The attribute value is not visible, but it is readable by JavaScript.

Registration Successful!

We will email your entry passes to the Louvre Museum in Paris.

<div data-registration-number="40039"
     style="background-color:aliceblue;padding:25px;">
  <b>Registration Successful!</b>
  <p>We will email your entry passes to the Louvre Museum in Paris.</p>
</div>

Using data-*

The data-* attribute adds custom information to a <div> element.

The * part is replaced with a lowercase string, such as data-id, data-source, data-category, etc.

An <div> 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 div element.


Syntax

<div data-*="value" >

Note: The * can be any string, such as data-iddata-costdata-supplier,  etc.


Values

#

Value Description
value A string value. Can be numeric, alphanumeric, JSON, etc.

More Examples

A custom data-ticket attribute on a <div> element.
Clicking the button will display the ticket number.

Registration Successful!

We will email your entry passes to the Louvre Museum in Paris.


<div data-ticket="1223887" id="mydiv"
     style="background-color:aliceblue;padding:25px;">
  <b>Registration Successful!</b>
  <p>We will email your entry passes to the Louvre Museum in Paris.</p>
</div>

<br/>
<button onclick="show();">Show data</button>

<script>
  let show = () => {
    let element = document.getElementById("mydiv");
    alert("Ticket # = " + element.getAttribute('data-ticket'));
  }
</script>

Code explanation

The <div> tag has a custom data-ticket attribute.

The data-ticket attribute holds the ticket number.

Clicks are handled by the onclick event.

Onclick invokes a JavaScript function that extracts and displays the ticket number.

Note: Notice how the number displays quickly without the need for a server call.


Browser support

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

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