An id on a <style> tag assigns an identifier to the style.
The identifier must be unique across the page.
An id attribute on a <style> element.
Oscar-Claude Monet was a French painter, a founder of French Impressionist painting and the most consistent and prolific practitioner of the movement's philosophy of expressing one's perceptions before nature, especially as applied to plein air landscape painting.
<style id="styles">
.turquoise { color: #1b6b6f; }
.soft-turquoise-bg { background-color: #eafafb; padding:15px 0;}
</style>
<article>
<h3 class="turquoise">Claude Monet</h3>
<p class="soft-turquoise-bg">
Oscar-Claude Monet was a French painter, a founder of
French Impressionist painting and the most consistent
and prolific practitioner of the movement's philosophy
of expressing one's perceptions before nature, especially
as applied to plein air landscape painting.
</p>
</article>
The id attribute assigns an identifier to the <style> element.
The id allows JavaScript to easily access the <style> 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.
<style id="identifier" />
| Value | Description |
|---|---|
| identifier | A unique alphanumeric string. The id value must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens (-), underscores (_), colons (:), and periods (.). |
A <style> tag with a unique id.
Clicking the button displays the CSS rules of the style.
Oscar-Claude Monet was a French painter, a founder of French Impressionist painting and the most consistent and prolific practitioner of the movement's philosophy of expressing one's perceptions before nature, especially as applied to plein air landscape painting.
<style id="mystyles">
.indigo{ color: #3630a3; }
.soft-indigo-bg { background-color: #f6f8ff; padding:15px 0;}
</style>
<article>
<h3 class="indigo">Claude Monet</h3>
<p class="soft-indigo-bg">
Oscar-Claude Monet was a French painter, a founder of
French Impressionist painting and the most consistent
and prolific practitioner of the movement's philosophy
of expressing one's perceptions before nature, especially
as applied to plein air landscape painting.
</p>
</article>
<br />
<button onclick="show();">Show style content</button>
<script>
let show = () => {
let element = document.getElementById("mystyles");
alert("Content = " + element.innerHTML);
}
</script>
The id attribute assigns a unique identifier for the <style>.
Clicking the button calls JavaScript which locates the <style> using the id.
Finally, the content of the <style> is displayed 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 <style>
