HTML and CSS Reference
<details> . . . </details>
Not in HTML 4.01 . Represents a disclosure widget (an area that can be toggled open and
closed) that reveals additional information or controls. The details element may contain a
summary element that provides a summary or title for the details, followed by additional flow
content. The details element should not be used for footnotes.
As of this writing, details and summary are only supported by Chrome 12+, Safari 6+, iOS
Safari 6+ Android 4.0+ and Blackberry 10+.
Flow content, sectioning root, interactive content, palpable content
Where flow content is expected
One summary element followed by flow content
HTML5 Global Attributes