HTML <dl> id Attribute

The id attribute on a <dl> tag assigns an identifier to the description list. The identifier must be unique across the page.

Example

#

A unique id attribute on a <dl> element.

Kunstmuseum
Basel, Switzerland
National Gallery of Art
Washington DC, USA
Musée d'Orsay
Paris, France
<dl id="museums">
  <dt>Kunstmuseum</dt>
  <dd>Basel, Switzerland</dd> 
  <dt>National Gallery of Art</dt>
  <dd>Washington DC, USA</dd>
  <dt>Musée d'Orsay</dt>
  <dd>Paris, France</dd>
</dl>

Using id

The id attribute assigns an identifier to the <dl> element.

The identifier must be unique across the page.

The id allows programmatic access to the <dl> element.

Tip:  id is a global attribute that can be applied to any HTML element.


Syntax

<dl id="identifier" />

Values

#

Value Description
identifier A unique alphanumeric string. The id value must begin with a letter ([article-Zarticle-z]) and may be followed by any number of letters, digits ([0-9]), hyphens (-), underscores (_), colons (:), and periods (.).


More Examples

A <dl> tag with an id.
Clicking the button displays the number of <dd> elements inside the data list.

Kunstmuseum
Basel, Switzerland
National Gallery of Art
Washington DC, USA
Musée d'Orsay
Paris, France

<dl id="mydl">
  <dt>Kunstmuseum</dt>
  <dd>Basel, Switzerland</dd> 
  <dt>National Gallery of Art</dt>
  <dd>Washington DC, USA</dd>
  <dt>Musée d'Orsay</dt>
  <dd>Paris, France</dd>
</dl>

<br/>
<button onclick="count();">Count dd elements</button>

<script>
  let count = () => {
    let element = document.getElementById("mydl");
    let length = element.querySelectorAll("dd").length;
    alert("Number of dd elements = " + length);
  }
</script>

Code explanation

The id attribute assigns a unique identifier for the <dl> element.

Clicking the button calls JavaScript which locates the element using its id.

It counts the <dd> elements inside the <dl> and displays this in an alert box.



Browser support

Here is when id 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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