A button with autofocus:
The autofocus attribute is a boolean attribute.
When present, it specifies that a button should automatically get focus when the page loads.
The numbers in the table specify the first browser version that fully supports the attribute.
The autofocus attribute is new for the <button> tag in HTML5.
In XHTML, attribute minimization is forbidden, and the autofocus attribute must be defined as <button autofocus="autofocus">.