Using the Right Tag for the Right Job - HTML5 Mastery: Semantics, Standards, and Styling - page 92

contextmenu global attribute, which used these two elements? Unfortunately, like
the contextmenu attribute, the command attribute has not been implemented in any
major browser yet, so these menus remain in the theoretical space of the HTML5 spe-
cification.
Summary
Congratulations! This has been a very dense chapter, filled with lots of information, but
I hope you have walked away with knowledge of what new elements exist in HTML5
and perhaps a refresher on other elements that have been there all along. Now it is time
to turn to the specifics we glossed over in this chapter and look at how to practically use
these rich new HTML elements.