js简单的注册页面代码

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>注册页面</title>
    <style>
        .error {
            color: red;
        }
    </style>
</head>
<body>
    <h1>注册</h1>
    <form id="registerForm">
        <label for="username">用户名：</label>
        <input type="text" id="username" name="username" required><br><br>

        <label for="email">邮箱：</label>
        <input type="email" id="email" name="email" required><br><br>

        <label for="password">密码：</label>
        <input type="password" id="password" name="password" required><br><br>

        <label for="confirmPassword">确认密码：</label>
        <input type="password" id="confirmPassword" name="confirmPassword" required><br><br>

        <button type="submit">注册</button>
    </form>

    <script>
        document.getElementById('registerForm').addEventListener('submit', function(event) {
            event.preventDefault();

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

            let isValid = true;

            if (password !== confirmPassword) {
                document.getElementById('confirmPassword').classList.add('error');
                isValid = false;
            } else {
                document.getElementById('confirmPassword').classList.remove('error');
            }

            if (!isValid) {
                alert('请检查输入的信息是否正确！');
                return;
            }

            // 在这里发送数据到服务器进行注册
            console.log('注册信息：', { username, email, password });
            alert('注册成功！');
        });
    </script>
</body>
</html>