selector-required.html (679B)
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <title>CSS level4 Selector :required and :optional</title> 5 <link rel="author" title="LEE YUN HEE" href="mailto:zzirasi@gmail.com"> 6 <link rel="help" href="http://www.w3.org/TR/selectors4/#opt-pseudos"> 7 <meta name="assert" content="You should see a green input box."> 8 <link rel="match" href="selector-required-ref.html"> 9 <style> 10 input {border:3px solid red;} 11 :required {border-color:green;} 12 :optional {border-color:green;} 13 </style> 14 </head> 15 <body> 16 <p> 17 You should see a green input box. 18 </p> 19 <p> 20 <input required> 21 </p> 22 <p> 23 <input optional> 24 </p> 25 </body> 26 </html>