Too long; didn't read
The details element keeps a long-winded passage hidden until the reader actively signals the intention to read it.
This keeps the user focused on the main point of the composition, keeping digressions, formal definitions, and excessively detailed material from loosing the readers attention.
- Specifies that the full composition should initially be visible.
- When open is omitted, the full composition is initially hidden.
- The summary element holds a short placeholder phrase for the hidden composition of a details element.