4.14. Disabled elements
An element is said to be actually disabled if it falls into one of the following categories:
- a
button
element that is disabled - an
input
element that is disabled - a
select
element that is disabled - a
textarea
element that is disabled - an
optgroup
element that has adisabled
attribute - an
option
element that is disabled - a
fieldset
element that is a disabled fieldset
This definition is used to determine what elements can be focused and which elements match the :disabled pseudo-class.