Permitted contents #

Permitted attributes #

ⓘ global attributes

Any attributes permitted globally.

ⓘ type = MIME type #

The language of the script or format of the data.

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 = non-empty URL potentially surrounded by spaces #

The address of the external script to use.

ⓘ defer = d:string "defer" or d:string "" #

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

ⓘ async = d:string "async" or d:string "" 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.

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.

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 "*/"
• Element “script” with attribute “language” whose value is “JavaScript” must not have attribute “type” whose value is not “text/javascript”.
• Element “script” must not have attribute “charset” unless attribute “src” is also specified.
• Element “script” must not have attribute “defer” unless attribute “src” is also specified.
• Element “script” must not have attribute “async” unless attribute “src” is also specified.
• The “language” attribute on the “script” element is obsolete. Use the “type” attribute instead.
• The “language” attribute on the “script” element is obsolete. You can safely omit it.

Permitted parent elements #

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