<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>CSS Psuedo Class Selector (:valid and :invalid)</title>
<style>
h1 {
color: #00bdc4;
border-bottom: 1px solid #bdbdbd;
padding-bottom: 20px;
}
input:valid {
background-color: #00bcd4;
color: #f5f5f5;
}
input:invalid {
background-color: #f44336;
color: #f5f5f5;
}
</style>
</head>
<body>
<div>
<h1>CSS Psuedo Class Selector (:valid and :invalid)</h1>
<form action="">
Email Address: <input type="email"><br>
</form>
</div>
</body>
</html>