day30/12.html at main · githubber-me/day30 · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>User Form Validation</title>
</head>
<body>
    <h1>Form Validation</h1>
    <form id="registrationForm">
        <label for="username">Username:</label>
        <input type="text" id="username" required><br>
        <label for="email">Email:</label>
        <input type="email" id="email" required><br>
        <label for="password">Password:</label>
        <input type="password" id="password" required><br>
        <button type="submit">Register</button>
    </form>
    <div id="message"></div>

    <script>
        const form = document.getElementById("registrationForm");
        const message = document.getElementById("message");

        form.addEventListener("submit", function(event) {
            event.preventDefault();

            const username = document.getElementById("username").value;
            const email = document.getElementById("email").value;
            const password = document.getElementById("password").value;

            if (username.length < 3) {
                message.textContent = "Username must be at least 3 characters long.";
            } else if (!email.includes("@")) {
                message.textContent = "Invalid email address.";
            } else if (password.length < 6) {
                message.textContent = "Password must be at least 6 characters long.";
            } else {
                message.textContent = "Form submitted successfully!";
                form.reset();
            }
        });
    </script>
</body>
</html>