ClassExtensions

This page lists the allowed extension values for the class="" attribute in HTML5. You may add your own values to this list, which makes them legal HTML5 class names. We ask that you try to avoid redundancy; if someone has already defined a name that does roughly what you want, please reuse it.

Keyword	Applicable elements	Brief description	Link to more details	Synonyms	Status
msonormal	All elements	A value used by Microsoft Office HTML output to mean nothing (literally).	none		Unendorsed
price	span	Indicates that the element represents a price. If there is a child element abbr, then the title of that element gives the currency. The textContent of the element, ignoring the contents of the abbr element, if any, must be a valid floating point number.	none		Proposal
ct	em	Indicates that the element represents a conformance term. The element must have a single text node which value is one of the key words defined by RFC 2119, lowercased. It is expected that this class will mainly be used in specifications.	none	rfc2119	Proposal
author	p, span	Indicates that the element contains details of the author of a neighbouring image.	none		Proposal
robots-nocontent	All elements	Indicates that the element contains no information relevant to search engines. Such as main navigation, advertisement, dynamic content that is useful only to users, and disclaimers and copyright statments.	Yahoo! Slurp allready support this class		Proposal

For the "Status" section to be changed to "Accepted", the proposed keyword must have been through the Microformats process, and been approved by the Microformats community. If it fails to go through this process, it is "Unendorsed".

For more details, see the HTML5 specification.