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negative selector

:not is a negative selector, which can filter out elements that do not want to be matched. The code example is as follows: 

<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<meta name="author" content="http://www.php.cn/" />
<title>php中文网</title>
<style type="text/css">
ul li{}
input:not(:disabled){
  color:green;
}
</style>
</head>
<body>
<ul>
  <li><input type="text" value="php中文网"/></li>
  <li><input type="text" disabled value="php中文网"/></li>
</ul>
</body>
</html>


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||
<!DOCTYPE html> <html> <head> <meta charset=" utf-8"> <meta name="author" content="http://www.php.cn/" /> <title>php中文网</title> <style type="text/css"> ul li{} input:not(:disabled){ color:green; } </style> </head> <body> <ul> <li><input type="text" value="php中文网"/></li> <li><input type="text" disabled value="php中文网"/></li> </ul> </body> </html>
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