Did you know? The Great Pyramid of Giza was the tallest building in the world for over 3,800 years, until the construction of the Lincoln Cathedral in the UK in 1311.
An id on a <span> tag assigns an identifier to the span.
The identifier must be unique across the page.
An id attribute on a <span> tag.
Did you know? The Great Pyramid of Giza was the tallest building in the world for over 3,800 years, until the construction of the Lincoln Cathedral in the UK in 1311.
<article>
<p>
Did you know? The Great Pyramid of Giza was the tallest building in the world
for <span id="duration">over 3,800 years</span>,
until the construction of the Lincoln Cathedral in the UK in 1311.
</p>
</article>
The id attribute assigns an identifier to the <span> element.
The id allows JavaScript to easily access the <span> 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.
<span 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 <span> element with a unique id attribute.
Clicking the button displays the text of the element.
Did you know? The Great Pyramid of Giza was the tallest building in the world for over 3,800 years, until the construction of the Lincoln Cathedral in the UK in 1311.
<article>
<p>
Did you know? The Great Pyramid of Giza was the tallest building in the world
for <span id="myspan" style="background:lavender;">over 3,800 years</span>,
until the construction of the Lincoln Cathedral in the UK in 1311.
</p>
</article>
<br />
<button onclick="show();">Show span text</button>
<script>
let show = () => {
let element = document.getElementById("myspan");
alert("Text = " + element.innerHTML);
}
</script>
The id attribute assigns a unique identifier for the <span>.
Clicking the button calls JavaScript which locates the <span> using the id.
Finally, the content of the <span> element 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 <span>
