HTML and CSS Reference
In-Depth Information
Alphabetical List of Elements
This section contains a list of all elements and attributes in HTML and the living HTML doc-
ument at WHATWG. Readers are advised to watch for these labels on elements and attributes:
Required
Attributesmarkedas
Required
mustbeincludedintheelementforthemarkuptobevalid.
W3C HTML5 only
Elements and attributes marked
W3C HTML5 only
appear only in the W3C HTML5
Candidate Recommendation and do not appear in the HTML5.1 Editor's Draft or
WHATWG.
WHATWG only
Elements and attributes marked
WHATWG only
appear only in the living HTML spe-
cification maintained by the WHATWG and are not part of the W3C Recommendation.
Not in HTML 4.01
Elements and attributes marked
Not in HTML 4.01
are new in HTML5 and will cause
documents using the HTML 4.01, XHTML1.0, and XHTML 1.1 DOCTYPEs to be inval-
id.
XHTML only
Attributes marked
XHTML only
apply only to documents written in XHTML (XML)
syntax.
