: The metadata element
The <meta> HTML element represents {{Glossary("Metadata","metadata")}} that cannot be represented by other meta-related elements, such as {{HTMLElement("base")}} , {{HTMLElement("link")}} , {{HTMLElement("script")}} , {{HTMLElement("style")}} , or {{HTMLElement("title")}} .
The type of metadata provided by the <meta> element can be one of the following:
- If the
nameattribute is set, the<meta>element provides document-level metadata that applies to the whole page. - If the
http-equivattribute is set, the<meta>element acts as a pragma directive to simulate directives that could otherwise be given by an HTTP header. - If the
charsetattribute is set, the<meta>element is a charset declaration, giving the character encoding in which the document is encoded. - If the
itempropattribute is set, the<meta>element provides user-defined metadata.
Attributes
This element includes the global attributes.
[!NOTE] The
nameattribute has a specific meaning for the<meta>element. Theitempropattribute must not be set on a<meta>element that includes aname,http-equiv, orcharsetattribute.
charset- : This attribute declares the document’s character encoding. If the attribute is present, its value must be an ASCII case-insensitive match for the string
"utf-8", because UTF-8 is the only valid encoding for HTML5 documents.<meta>elements which declare a character encoding must be located entirely within the first 1024 bytes of the document.
- : This attribute declares the document’s character encoding. If the attribute is present, its value must be an ASCII case-insensitive match for the string
content- : This attribute contains the value for the
http-equivornameattribute, depending on which is used.
- : This attribute contains the value for the
http-equiv- : Defines a pragma directive, which are instructions for the browser for processing the document.
The attribute’s name is short for
http-equivalentbecause the allowed values are names of equivalent HTTP headers.
- : Defines a pragma directive, which are instructions for the browser for processing the document.
The attribute’s name is short for
media- : The
mediaattribute defines which media the theme color defined in thecontentattribute should be applied to. Its value is a media query, which defaults toallif the attribute is missing. This attribute is only relevant when the element’snameattribute is set totheme-color. Otherwise, it has no effect, and should not be included.
- : The
name- : The
nameandcontentattributes can be used together to provide document metadata in terms of name-value pairs, with thenameattribute giving the metadata name, and thecontentattribute giving the value.
- : The
Examples
Setting a meta description
The following <meta> tag provides a description as metadata for the web page:
<meta
name="description"
content="The HTML reference describes all elements and attributes of HTML, including global attributes that apply to all elements." />
Setting a page redirect
The following example uses http-equiv="refresh" to direct the browser to perform a redirect.
The content="3;url=https://www.mozilla.org" attribute will redirect page to https://www.mozilla.org after 3 seconds:
<meta http-equiv="refresh" content="3;url=https://www.mozilla.org" />
Technical summary
| Content categories |
Metadata content. If the itemprop attribute is present:
flow content,
phrasing content.
|
|---|---|
| Permitted content | None; it is a `{{Glossary("void element")}}` . |
| Tag omission | Must have a start tag and must not have an end tag. |
| Permitted parents |
|
| Implicit ARIA role | No corresponding role |
| Permitted ARIA roles | No role permitted |
| DOM interface | `{{domxref("HTMLMetaElement")}}` |
Specifications
{{Specifications}}
Browser compatibility
{{Compat}}