HTML <footer> id Attribute

HTML <figure>

HTML <form>

An id on a <footer> tag assigns an identifier to the footer.

The identifier must be unique across the page.

Example

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An id attribute on a <footer>.

<footer id="footer-copyright">
  <p>&copy; Company, Ltd. All Rights Reserved.</p>
</footer>

Using id

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

The id allows JavaScript to easily access the <footer> 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.

Syntax

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<footer id="identifier" />

Values

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Value	Description
identifier	A unique alphanumeric string. The id value must begin with a letter ([aside-Zaside-z]) and may be followed by any number of letters, digits ([0-9]), hyphens (-), underscores (_), colons (:), and periods (.).

More Examples

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A <footer> element with a unique id.
Clicking the button displays the content of the element.

<footer id="myfooter">
  <p>&copy; Company, Ltd. All Rights Reserved.</p>
</footer>
  
<br/>
<button onclick="show();">Show footer content</button>

<script>
  let show = () => {
    let footer = document.getElementById("myfooter");
    alert("Content = " + footer.innerHTML);
  }
</script>

Code explanation

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

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

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

Browser support

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Here is when id support started for each browser: