br element Specifies a hard line break in the text, details element The HTML details element (<details>) is used as a disclosure widget from which the user the retrieve additional information, iframe element Defines an inline frame (ie a frame embedded in a document). 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':