I don’t want to say much nonsense, but I’ll go to the code directly
1. Top, middle and bottom layout:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
body {
position: absolute;
left: 0; right: 0; top: 0; bottom: 0;
padding: 0; margin: 0;
display: flex;
flex-direction: column;
}
.header, .footer {
height: 50px;
}
.body {
flex-grow: 1;
background-color: #DDD;
}
</style>
</head>
<body>
<div class="header">Header</div>
<div class="body">Content</div>
<div class="footer">Footer</div>
</body>
</html>The display effect is as follows:
2. Left and right layout:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
body {
position: absolute;
left: 0; right: 0; top: 0; bottom: 0;
padding: 0; margin: 0;
display: flex;
}
.left, .right {
height: 100%;
}
.left {
width: 250px;
background-color: rgba(255,0,0,0.3);
}
.right {
display: flex;
flex-direction: column;
}
.header, .footer {
height: 50px;
}
.right, .content {
flex-grow: 1;
}
.content {
background-color: #DDD;
}
</style>
</head>
<body>
<div class="left">LeftNav</div>
<div class="right">
<div class="header">Header</div>
<div class="content">Content</div>
<div class="footer">Footer</div>
</div>
</body>
</html>
The effect of the page is as follows:
Here are a few key styles, so you can design any layout you want:
Flex grow: 1; // indicates that the sub item occupies the remaining space when the width of the main axis is redundant
Let this element occupy the top: 0; position: 0