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