Source Code: (back to article)
<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<style>
input {
border: 1px solid #cccccc;
padding: 5px 10px;
}
input:valid {
background-color: #eeeeee;
}
</style>
</head>
<body>
<h2>:valid selector example</h2>
<form>
<input type="email" value="w3docs@example.com">
</form>
</body>
</html>