Permitted contents #

Permitted attributes #

ⓘ global attributes

Any attributes permitted globally.

ⓘ type = MIME type #

The language of the script or format of the data.

The language attribute on the script element is obsolete. You can safely omit it.

A string that identifies a valid MIME media type as defined in [RFC 2046].

ⓘ language = string OBSOLETE #

Specifies that the language of the script is JavaScript.

ⓘ src = URL potentially surrounded by spaces #

The address of the external script to use.

ⓘ defer = "defer" or "" (empty string) or empty #

Specifies that script should be executed after the document has been parsed.

ⓘ async = "async" or "" (empty string) or empty NEW #

Specifies that the script should be executed asynchronously, as soon as it becomes available.

ⓘ charset = character encoding name #

The character encoding of the external script.

One of the following:

• For documents in the HTML syntax: A case-insensitive match for any character set name for which the IANA [Character Sets] registry has a Name or Alias field labeled as “preferred MIME name”; or, if none of the Alias fields are so labeled, a case-insensitive match for a Name field in the registry.
• For documents in the XML syntax: Any case-insensitive match for the string "UTF-8".

Additional constraints and admonitions #

• A script element must not contain an occurrence of the character sequence "<!--" without a matching later occurrence of the character sequence "-->".
• A script element with a “src” attribute must contain only:
  • lines that consist solely of a newline, optionally preceded by one or more space (U+0020) characters or tab (U+0009) characters
  • single-line comments, which are lines beginning with the character sequence "//", optionally preceded by one more more space (U+0020) characters or tab (U+0009) characters, followed by any number of characters that are not a newline, and ending with a newline
  • multi-lines comments, which begin with the character sequence "/*", optionally preceded by one more more space (U+0020) characters or tab (U+0009) characters, and that end with the character sequence "*/"
• A script element with a language attribute whose value is “JavaScript” must not have a type attribute whose value is not “text/javascript”.
• The language attribute on the script element is obsolete. Use the type attribute instead.

Permitted parent elements #

any element that can contain metadata elements, any element that can contain phrasing elements