CSS :required Selector

Select and style only if the <input> element has a "required" attribute:

input:required {
background-color: yellow;
}

Definition and Usage

The :required selector selects form elements which are required.

Form elements with a required attribute are defined as required.

Note: The :required selector only applies to the form elements: input, select and textarea.

Tip: Use the :optional selector to select form elements which are optional.

Version:	CSS3

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

Selector
:required	10.0	10.0	4.0	5.0	10.0

:required {
css declarations;
}

CSS Selector :optional