pass.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Password Validation</title>
    <link rel="stylesheet" type="text/css" href="pass.css">
</head>
<body>
    <form>
    <div class="container">
        <label for="user">Username</label>
        <input type="text"id="user"name="Username"required>
        <label for="pass">Password</label>
        <input type="password"id="pass"name="Password"pattern="(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{8,}"title="Must contain atleast one number and one uppercase and lowercase letter, and atleast 8 or more characters"required>
        <input type="submit"value="Submit">
    </form>
    </div>
    <div id="message">
        <h3>Password must contain the following</h3>
        <p id="letter" class="invalid">A <b> lowercase</b> letter </p>
        <p id="capital" class="invalid">A <b> uppercase</b> letter </p>
        <p id="number" class="invalid">A <b> number</b> </p>
        <p id="length" class="invalid">Minimum <b>8 characters</b></p>

    </div>
    <script src="pass.js"></script>
</body>
</html>