HTML <p> id Attribute

The id attribute on a <p> tag assigns an identifier to the paragraph. The identifier must be unique across the page.

Example

#

An id attribute on a <p> element.

The Palace Museum is a national museum housed in the Forbidden City at the core of Beijing, China. It was established in 1925 after the last Emperor of China was evicted from his palace, and opened its doors to the public.

<article>
  <p id="palace">
    The Palace Museum is a national museum housed in 
    the Forbidden City at the core of Beijing, China. 
    It was established in 1925 after the last Emperor 
    of China was evicted from his palace, and opened 
    its doors to the public.
  </p>
</article>

Using id

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

The identifier must be unique across the page.

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

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


Syntax

<p 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 <p> element with a unique id attribute.
Clicking the button displays the number of characters in the paragraph.

The Palace Museum is a national museum housed in the Forbidden City at the core of Beijing, China. It was established in 1925 after the last Emperor of China was evicted from his palace, and opened its doors to the public.


<p id="myparagraph">
    The Palace Museum is a national museum housed in 
    the Forbidden City at the core of Beijing, China. 
    It was established in 1925 after the last Emperor 
    of China was evicted from his palace, and opened 
    its doors to the public.
</p>

<br/>
<button onclick="show();">Show # characters</button>

<script>
  let show = () => {
    let element = document.getElementById("myparagraph");
    let count = element.innerHTML.length;
    alert("Character count = " + count);
  }
</script>

Code explanation

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

Clicking the button calls JavaScript which locates the <p> using the id.

It then counts the number of characters inside the <p> content and displays it 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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