HTML <meta> id Attribute

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

Example

#

An id attribute on a <meta> tag.

<head>
  <meta id="meta-viewport" name="viewport" 
        content="width=device-width, initial-scale=1.0">
</head>
meta = metadata

Using id

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

The identifier must be unique across the page.

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

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


Syntax

<meta id="identifier" />

Values

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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 <meta> element with a unique id.
Clicking the button will show the content of the element.

<head>
  <meta id="mymeta" name="viewport" 
        content="width=device-width, initial-scale=1.0">
</head>

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

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

Code explanation

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

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

Finally, the content of the <meta> 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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