要實現(xiàn)一個登css實現(xiàn)讓登錄框始終處于頁面的中心位置
要實現(xiàn)一個登錄框始終位于頁面的中心位置，你可以使用CSS的多種方法。下面是一些常用的方法：
方法1：使用Flexbox
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Centered Login Form</title>
<style>
body, html {
height: 100%;
margin: 0;
display: flex;
justify-content: center;
align-items: center;
background-color: #f0f0f0;
}
.login-form {
background-color: white;
padding: 20px;
border-radius: 8px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
</style>
</head>
<body>
<div>
<h2>Login</h2>
<form>
<label for="username">Username:</label>
<input type="text" id="username" name="username"><br><br>
<label for="password">Password:</label>
<input type="password" id="password" name="password"><br><br>
<input type="submit" value="Login">
</form>
</div>
</body>
</html><!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Centered Login Form</title>
<style>
body, html {
height: 100%;
margin: 0;
display: grid;
place-items: center; /* This is a shorthand for align-items and justify-items */
background-color: #f0f0f0;
}
.login-form {
background-color: white;
padding: 20px;
border-radius: 8px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
</style>
</head>
<body>
<div>
<h2>Login</h2>
<form>
<label for="username">Username:</label>
<input type="text" id="username" name="username"><br><br>
<label for="password">Password:</label>
<input type="password" id="password" name="password"><br><br>
<input type="submit" value="Login">
</form>
</div>
</body>
</html><!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Centered Login Form</title>
<style>
body, html {
height: 100%;
margin: 0;
}
.login-form {
position: absolute; /* or fixed */
top: 50%; /* positions the top edge of the element at the middle of the parent */
left: 50%; /* positions the left edge of the element at the middle of the parent */
transform: translate(-50%, -50%); /* moves the element back by its own width and height */
background-color: white;
padding: 20px;
border-radius: 8px;
box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
</style>
</head>
<body>
<div>
<h2>Login</h2>
<form>
<label for="username">Username:</label>
<input type="text" id="username" name="username"><br><// 首先需要獲取登錄框的整體高度，設(shè)置父元素高度寬度為100%，這里假設(shè)高度為登錄框高度為500px
.container{
width:100%;
height:100%;
}
.login{
margin:calc((100% - 500px)/2) auto;
}
B2C電商系統(tǒng)商城源碼支持pC+小程序+公眾號+H5可打包App源...
原生開發(fā)淘寶客App，Android+ios獨立開發(fā)，全開源支持二...
應(yīng)客知識付費系統(tǒng)在線教育平臺源碼+題庫系統(tǒng)源碼，PC+公眾號商業(yè)授...
B2C單商戶電商系統(tǒng)源碼部署小程序+公眾號+H5+App源碼...
應(yīng)客教育知識付費系統(tǒng)源碼帶題庫功能商業(yè)授權(quán)公眾號+H5源碼...
陜公網(wǎng)安備61019602000396 方烜律師事務(wù)所提供法律服務(wù) | Copyright 2026 源碼碼網(wǎng) 版權(quán)所有
