A data-* attribute on a <section> tag attaches additional data to the section.
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 <section>.
The attribute value is not visible, but it is readable by JavaScript.
The Night Watch (Dutch: De Nachtwacht), is a 1642 painting by Rembrandt van Rijn. It is in the collection of the Amsterdam Museum but is prominently displayed in the Rijksmuseum (State Museum) as the best-known painting in its collection. The Night Watch is the most famous Dutch Golden Age painting.
<section data-title="The Night Watch">
<h2>The Night Watch</h2>
<p>The Night Watch (Dutch: De Nachtwacht), is a 1642
painting by Rembrandt van Rijn. It is in the collection
of the Amsterdam Museum but is prominently displayed
in the Rijksmuseum (State Museum) as the best-known
painting in its collection. The Night Watch is
the most famous Dutch Golden Age painting.
</p>
</section>
The data-* attribute adds custom information to a <section> element.
The * part is replaced with a lowercase string, such as data-id, data-cost, or data-location.
An <section> 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 section.
<section 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 <section> element.
Clicking the button will display the topic value.
The Night Watch (Dutch: De Nachtwacht), is a 1642 painting by Rembrandt van Rijn. It is in the collection of the Amsterdam Museum but is prominently displayed in the Rijksmuseum (State Museum) as the best-known painting in its collection. The Night Watch is the most famous Dutch Golden Age painting.
<section id="mysection" data-topic="The Night Watch">
<h2>The Night Watch</h2>
<p>The Night Watch (Dutch: De Nachtwacht), is a 1642
painting by Rembrandt van Rijn. It is in the collection
of the Amsterdam Museum but is prominently displayed
in the Rijksmuseum (State Museum) as the best-known
painting in its collection. The Night Watch is
the most famous Dutch Golden Age painting.
</p>
</section>
<br/>
<button onclick="show();">Show data</button>
<script>
let show = () => {
let element = document.getElementById("mysection");
alert("Topic = " + element.getAttribute('data-topic'));
}
</script>
The <section> tag has a custom data-topic
attribute.
The data-topic
attribute holds the topic of the <section> content.
Clicks are handled by the onclick
event.
Onclick invokes a JavaScript function that extracts and displays <section> topic.
Note: Notice how the title displays immediately without server call.
Here is when data-* support started for each browser:
Chrome
|
6.0 | Sep 2010 |
Firefox
|
4.0 | Mar 2011 |
IE/Edge
|
9.0 | Mar 2011 |
Opera
|
11.1 | Mar 2011 |
Safari
|
5.0 | Jun 2010 |
Back to <section>