| <!DOCTYPE html> |
| <html> |
| <head> |
| <title>CSS level4 Selector :required and :optional</title> |
| <link rel="author" title="LEE YUN HEE" href="mailto:zzirasi@gmail.com"> |
| <link rel="help" href="http://www.w3.org/TR/selectors4/#opt-pseudos"> |
| <meta name="assert" content="You should see a green input box."> |
| <link rel="match" href="selector-required-ref.html"> |
| <style> |
| input {border:3px solid red;} |
| :required {border-color:green;} |
| :optional {border-color:green;} |
| </style> |
| </head> |
| <body> |
| <p> |
| You should see a green input box. |
| </p> |
| <p> |
| <input required> |
| </p> |
| <p> |
| <input optional> |
| </p> |
| </body> |
| </html> |
