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<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Professional Number Input Validation</title>
<style>
/* Reset some default styles */
* {
box-sizing: border-box;
margin: 0;
padding: 0;
}
body {
font-family: 'Arial', sans-serif;
background: linear-gradient(135deg, #e0eafc, #cfdef3);
display: flex;
justify-content: center;
align-items: center;
height: 100vh;
}
.container {
background: white;
padding: 40px;
border-radius: 10px;
box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
text-align: center;
width: 350px;
transition: transform 0.3s;
}
.container:hover {
transform: scale(1.02);
}
h1 {
font-size: 28px;
margin-bottom: 20px;
color: #333;
text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}
input {
padding: 12px;
margin: 15px 0;
width: 100%;
border: 2px solid #007bff;
border-radius: 5px;
font-size: 16px;
transition: border-color 0.3s;
}
input:focus {
border-color: #0056b3;
outline: none;
box-shadow: 0 0 5px rgba(0, 123, 255, 0.5);
}
button {
padding: 12px;
background-color: #007bff;
color: white;
border: none;
border-radius: 5px;
cursor: pointer;
width: 100%;
font-size: 16px;
transition: background-color 0.3s, transform 0.3s;
}
button:hover {
background-color: #0056b3;
transform: translateY(-2px);
}
.error-message {
color: red;
display: none; /* Hidden by default */
margin-top: 10px;
font-weight: bold;
}
.success-message {
color: green;
display: none; /* Hidden by default */
margin-top: 10px;
font-weight: bold;
}
</style>
</head>
<body>
<div class="container">
<h1>Number Input Validation</h1>
<form id="numberForm">
<input type="text" id="numberInput" placeholder="Enter a number" required>
<button type="submit" id="submitButton">Submit</button>
<div id="errorMessage" class="error-message">Please enter a valid number!</div>
<div id="successMessage" class="success-message">Input is valid!</div>
</form>
</div>
<script>
document.getElementById('numberForm').addEventListener('submit', function(event) {
event.preventDefault(); // Prevent form submission
const input = document.getElementById('numberInput').value;
const errorMessage = document.getElementById('errorMessage');
const successMessage = document.getElementById('successMessage');
// Reset messages
errorMessage.style.display = 'none';
successMessage.style.display = 'none';
// Check if the input is a valid number
if (isNaN(input) || input.trim() === '') {
errorMessage.style.display = 'block'; // Show error message
} else {
successMessage.style.display = 'block'; // Show success message
}
});
</script>
</body>
</html>
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