HTML <span> id Attribute

The id attribute on a <span> tag assigns an identifier to the inline span element. The identifier must be unique across the page.

Example

#

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>

Using id

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

The identifier must be unique across the page.

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

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


Syntax

<span id="identifier" />

Values

#

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 (.).

More Examples

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>

Code explanation

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.


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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