HTML <section> id Attribute

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

Example

#

An id attribute on a <section> element.

The Night Watch

The Night Watch (Dutch: De Nachtwacht), is a 1642 painting by Rembrandt van Rijn. It is in the collection of the Amsterdam Museum but is prominently displayed in the Rijksmuseum (State Museum) as the best-known painting in its collection. The Night Watch is the most famous Dutch Golden Age painting.

<section id="nigth-watch">
  <h2>The Night Watch</h2>
  <p>
    The Night Watch (Dutch: De Nachtwacht), is a 1642 
    painting by Rembrandt van Rijn. It is in the collection 
    of the Amsterdam Museum but is prominently displayed 
    in the Rijksmuseum (State Museum) as the best-known 
    painting in its collection. The Night Watch is 
    the most famous Dutch Golden Age painting.
  </p>
</section>

Using id

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

The identifier must be unique across the page.

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

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


Syntax

<section 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 <section> element with a unique id.
Clicking the button will display the content of the element.

The Night Watch

The Night Watch (Dutch: De Nachtwacht), is a 1642 painting by Rembrandt van Rijn. It is in the collection of the Amsterdam Museum but is prominently displayed in the Rijksmuseum (State Museum) as the best-known painting in its collection. The Night Watch is the most famous Dutch Golden Age painting.


<section id="mysection">
  <h2>The Night Watch</h2>
  <p>The Night Watch (Dutch: De Nachtwacht), is a 1642 
     painting by Rembrandt van Rijn. It is in the collection 
     of the Amsterdam Museum but is prominently displayed 
     in the Rijksmuseum (State Museum) as the best-known 
     painting in its collection. The Night Watch is 
     the most famous Dutch Golden Age painting.
  </p>
</section>

<br />
<button onclick="show();">Show section content</button>

<script>
  let show = () => {
     let element = document.getElementById("mysection");
     alert("Content = " + element.innerHTML);
  }
</script>

Code explanation

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

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

Finally, the content of the <section> is displayed in an alert box.


Browser support

Here is when id support started for each browser:

Chrome
6.0 Sep 2010
Firefox
4.0 Mar 2011
IE/Edge
9.0 Mar 2011
Opera
11.1 Mar 2011
Safari
5.0 Jun 2010

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