To HTML Content Category Interactive

Html elements aiframe, and wbr

a element Specifies either a hyperlink or a target for a hyperlink, iframe element Defines an inline frame (ie a frame embedded in a document), wbr element For a block of text enclosed by nobr tags, indicates a place where a line break may occur. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.

Restore previous example

a a and iframe, aiframe, and wbr

Advanced example

Click the html element name in the punctuation list to advance the example in 'Tryit-Editor':

You cannot advance example level further.

HTML element example

Result from the Online TryIt-Editor
chrome 1.0safari 4.0Firefox 3.6ie N/Aopera N/A