使用html + css + js写一个登录页面
时间: 2024-01-14 22:04:11 浏览: 23
好的,以下是一个简单的登录页面的HTML、CSS和JS代码:
HTML代码:
```
<!DOCTYPE html>
<html>
<head>
<title>Login Page</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<form>
<h1>Login</h1>
<label for="username">Username</label>
<input type="text" id="username" name="username" placeholder="Enter username" required>
<label for="password">Password</label>
<input type="password" id="password" name="password" placeholder="Enter password" required>
<button type="submit">Login</button>
</form>
<script src="script.js"></script>
</body>
</html>
```
CSS代码:
```
body {
font-family: Arial, sans-serif;
background-color: #f4f4f4;
margin: 0;
padding: 0;
}
form {
background-color: #fff;
border-radius: 4px;
box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.3);
margin: auto;
padding: 20px;
max-width: 400px;
}
h1 {
text-align: center;
}
label {
display: block;
font-weight: bold;
margin-bottom: 10px;
}
input[type=text],
input[type=password] {
border: none;
border-radius: 4px;
box-shadow: inset 0px 1px 2px rgba(0, 0, 0, 0.1);
box-sizing: border-box;
font-size: 16px;
margin-bottom: 20px;
padding: 10px;
width: 100%;
}
button[type=submit] {
background-color: #4CAF50;
border: none;
border-radius: 4px;
color: #fff;
font-size: 16px;
padding: 10px 20px;
transition: background-color 0.3s ease;
}
button[type=submit]:hover {
background-color: #3e8e41;
cursor: pointer;
}
```
JS代码:
```
const form = document.querySelector('form');
const username = document.querySelector('#username');
const password = document.querySelector('#password');
form.addEventListener('submit', function(event) {
event.preventDefault();
validateLogin();
});
function validateLogin() {
if (username.value === '' || password.value === '') {
alert('Please enter a username and password');
} else if (username.value !== 'example' || password.value !== 'password') {
alert('Incorrect username or password');
} else {
alert('Login successful!');
}
}
```
请注意:这只是一个基本的登录页面,并不是一个安全的解决方案。在实际应用中,应考虑使用更严格的身份验证和安全性措施。