Html elements header, command, and input

header element The HTML Header Element (<header>) represents a group of introductory or navigational aids, command element The command element represents a command which the user can invoke, input element Defines an input element, such as a text field control or button, within a form. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.

Restore previous example

header header and command, header, command, and input

Advanced example

Click the html element name in the punctuation list to advance the example in 'Tryit-Editor':

You cannot advance example level further.