示例 17: 表单提交和验证-CFANZ编程社区

示例 17: 表单提交和验证
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Form Validation</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            background-color: #f0f2f5;
        }
        .container {
            max-width: 600px;
            margin: 50px auto;
            padding: 20px;
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }
        h1 {
            color: #333;
            text-align: center;
        }
        form {
            display: flex;
            flex-direction: column;
        }
        input {
            margin-bottom: 15px;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 5px;
        }
        button {
            padding: 10px;
            border: none;
            border-radius: 5px;
            background-color: #007bff;
            color: white;
            font-size: 1em;
            cursor: pointer;
        }
        button:hover {
            background-color: #0056b3;
        }
        .error {
            color: red;
            font-size: 0.9em;
            margin-bottom: 15px;
        }
    </style>
</head>
<body>
    <div class="container">
        <h1>Form Validation</h1>
        <form id="myForm">
            <div id="error" class="error"></div>
            <input type="text" id="name" placeholder="Name" required>
            <input type="email" id="email" placeholder="Email" required>
            <input type="password" id="password" placeholder="Password" required>
            <button type="submit">Submit</button>
        </form>
    </div>
    <script>
        document.getElementById('myForm').addEventListener('submit', function(event) {
            event.preventDefault();

            const name = document.getElementById('name').value;
            const email = document.getElementById('email').value;
            const password = document.getElementById('password').value;
            const errorDiv = document.getElementById('error');

            let errors = [];

            if (name === '') {
                errors.push('Name is required.');
            }

            const emailPattern = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
            if (!emailPattern.test(email)) {
                errors.push('Invalid email address.');
            }

            if (password.length < 6) {
                errors.push('Password must be at least 6 characters long.');
            }

            if (errors.length > 0) {
                errorDiv.innerHTML = errors.join('<br>');
            } else {
                errorDiv.innerHTML = '';
                alert('Form submitted successfully!');
                // Here you can add code to submit the form data to the server
            }
        });
    </script>
</body>
</html>
0 条评论