An id on a <meta> tag assigns an identifier to the element.
The identifier must be unique across the page.
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
The id attribute assigns an identifier to the <meta> element.
The id allows JavaScript to easily access the <meta> 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.
<meta id="identifier" />
| 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 (.). |
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>
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.
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 |
Back to <meta>
