details element The HTML details element (<details>) is used as a disclosure widget from which the user the retrieve additional information, sup element Specifies that the enclosed text should be rendered in the browser as superscript, small element Decreases the font size of the enclosed text by one. 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':