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# HTML+CSS+JS 实现登陆页面

# 实现效果




# 实现代码

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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>log & register</title>
    <style>
        * {
            padding: 0;
            margin: 0;
            transition: .3s;
        }
        body {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            background-image: url(login/04.jpg);
            background-size: cover;
        }
        .shell {
            width: 350px;
            padding: 40px;
            display: flex;
            align-items: center;
            flex-direction: column;
            background-color: #ffffff49;
            border-radius: 50px;
            box-shadow: 0 0 30px rgba(255, 255, 255, 0.5) inset;
            transform: translateY(-50px);
        }
        .title {
            font-size: 80px;
            margin-bottom: 30px;
            color: #fff;
            text-shadow: 0 0 10px #ff9dff80;
        }
        input[type="text"],
        input[type="password"] {
            width: 100%;
            height: 50px;
            margin: 10px 0;
            box-sizing: border-box;
            color: rgb(0, 0, 0);
            border: 5px solid transparent;
            background: rgba(255, 255, 255, .5);
            border-radius: 100px;
            padding: 5px 20px 0 20px;
            transition: 0.3s;
            font-size: 18px;
            outline: none
        }
        input[type="text"]:hover,
        input[type="password"]:hover {
            background: rgba(255, 255, 255, 0);
            border: 5px solid #ffffff;
        }
        input[type="submit"] {
            width: 100%;
            height: 50px;
            padding: 10px;
            margin: 15px 0;
            border-radius: 100px;
            border: none;
            background-color: #007bff;
            color: #fff;
            cursor: pointer;
            font-size: 20px;
            letter-spacing: 3px;
        }
        input::placeholder {
            color: #92A7E8;
        }
        .footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            margin-top: 20px;
        }
        .Remember {
            opacity: 1;
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 18px;
            color: #7597ff;
        }
        input[type="checkbox"] {
            display: block;
            width: 25px;
            height: 25px;
            margin-right: 10px;
            background-color: #007bff;
        }
        #Password {
            border: none;
            background-color: #ffffff00;
            color: #7597ff;
            font-size: 18px;
        }
    </style>
</head>
<body>
    <div class="shell">
        <h2 class="title">Login</h2>
        <input type="text" id="username" placeholder="Username">
        <input type="password" id="password" placeholder="Password">
        <input type="submit" value="Login" id="loginBtn">
        <div class="footer">
            <div class="Remember">
                <input type="checkbox" id="rememberMe">
                <label for="rememberMe">记住我</label>
            </div>
            <button id="Password">去注册</button>
        </div>
    </div>
</body>
<script>
    document.getElementById('Password').addEventListener('click', function () {
        var title = document.querySelector('.title');
        var loginBtn = document.getElementById('loginBtn');
        var rememberMeLabel = document.querySelector('.Remember');
        var passwordBtn = document.getElementById('Password');
        if (title.innerText === 'Login') {
            title.innerText = 'Register';
            loginBtn.value = 'Register';
            rememberMeLabel.style.opacity = '0';
            passwordBtn.innerText = '去登录';
            document.getElementById('username').value = '';
            document.getElementById('password').value = '';
            document.getElementById('username').placeholder = 'New Username';
            document.getElementById('password').placeholder = 'New Password';
            document.getElementById('password').type = 'password';
        } else {
            title.innerText = 'Login';
            loginBtn.value = 'Login';
            rememberMeLabel.style.opacity = '1';
            passwordBtn.innerText = '去注册';
            document.getElementById('username').placeholder = 'Username';
            document.getElementById('password').placeholder = 'Password';
            document.getElementById('password').type = 'password';
        }
    });
</script>
</html>