An id on a <dl> tag assigns an identifier to the element.
The identifier must be unique across the page.
A unique id attribute on a <dl> element.
<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>
The id attribute assigns an identifier to the <dl> element.
The id allows JavaScript to easily access the <dl> element.
It is also used to point to a specific id selector in a style sheet.
Tip: id is a global attribute that can be applied to any HTML element.
<dl id="identifier" />
| 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 (.). |
A <dl> tag with an id.
Clicking the button displays the number of <dd> elements inside the data list.
<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>
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.
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 |
Back to <dl>
