NOTE: This new element is HTML5 and will be a standardized element in 2014.

The HTML <summary> element is used with the <details> element and gives us a way to define a custom heading for the details toggle text. By default it will say "Details" if you do not use the <summary> tag to define the words. The little tic arrow and the summary text can be clicked to toggle visibility of the details.

Attributes for this element:

open - specify that the contents be open to the user
Possible Values: "open"

global attributes - global core attributes
See: list of global attributes

Event handlers for this element:

global event handlers - global event handler attributes
See: list of global event handlers