CSS :default Selector

Add a red shadow color to the default input element:

input:default {
box-shadow: 0 0 1px 1px red;
}

Definition and Usage

The :default selector selects the default form element in a group of related elements.

The :default selector can only be used on <button>, <input type="checkbox">, <input type="radio">, and <option> elements

Version:	CSS3

The numbers in the table specifies the first browser version that fully supports the selector.

Selector
:default	10.0	12.0	4.0	5.0	10.0

Note: The :default selector is not supported in Internet Explorer 11 and earlier versions.

:default {
css declarations;
}