:optional Back

• :optional is a CSS pseudo-class selector used to select form elements that are optional.
• More specifically, it is used to select form elements that are not required; that is, form elements that do not have the required attribute set.
• The form elements than can be selected using :optional are <input>s, <select>s, and <textarea>s without a required attribute.

Case: learning :optional

See the Pen LGadwJ by aleen42 (@aleen42) on CodePen.

Note

• If you want to select form elements that are required, you can use the :required pseudo-class selector.