The details element represents a disclosure widget from which the user can obtain additional information or controls.
open attribute is set on the
details tag, it will be open when it’s rendered.
The <details> tag is currently only supported in Chrome and in Safari on Mac.
<details open="open"> <p>Foo</p> <p>Bar</p> <p>Peter</p> </details>
- HTML 5.1
- W3C Working Draft