iframe element Defines an inline frame (ie a frame embedded in a document), details element The HTML details element (<details>) is used as a disclosure widget from which the user the retrieve additional information, 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.
Click the html element name in the punctuation list to advance the example in 'Tryit-Editor':