CSS :read-write Selector
Select and style only if the input element is not "readonly":
Definition and Usage
:read-write selector selects form elements which are "readable" and "writeable".
Form elements with no "readonly" attribute, and no "disabled" attribute are defined as "read-" and "write-able".
The numbers in the table specify the first browser version that fully supports the property.
Numbers followed by -webkit- or -moz- specify the first version that worked with a prefix.
CSS Selector :read-only