# 布局
# 圣杯布局
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>圣杯布局</title>
<style type="text/css">
body {
min-width: 550px;
}
#header {
text-align: center;
background-color: #f1f1f1;
}
#container {
padding-left: 200px;
padding-right: 150px;
}
#container .column {
float: left;
}
#center {
background-color: #ccc;
width: 100%;
}
#left {
position: relative;
background-color: yellow;
width: 200px;
margin-left: -100%;
right: 200px;
}
#right {
background-color: red;
width: 150px;
margin-right: -150px;
}
#footer {
text-align: center;
background-color: #f1f1f1;
}
/* 手写 clearfix */
.clearfix:after {
content: '';
display: table;
clear: both;
}
</style>
</head>
<body>
<div id="header">this is header</div>
<div id="container" class="clearfix">
<div id="center" class="column">this is center</div>
<div id="left" class="column">this is left</div>
<div id="right" class="column">this is right</div>
</div>
<div id="footer">this is footer</div>
</body>
</html>
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# 双飞翼布局
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>双飞翼布局</title>
<style type="text/css">
body {
min-width: 550px;
}
.col {
float: left;
}
#main {
width: 100%;
height: 200px;
background-color: #ccc;
}
#main-wrap {
margin: 0 190px 0 190px;
}
#left {
width: 190px;
height: 200px;
background-color: #0000FF;
margin-left: -100%;
}
#right {
width: 190px;
height: 200px;
background-color: #FF0000;
margin-left: -190px;
}
</style>
</head>
<body>
<div id="main" class="col">
<div id="main-wrap">
this is main
</div>
</div>
<div id="left" class="col">
this is left
</div>
<div id="right" class="col">
this is right
</div>
</body>
</html>
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# 色子
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>flex 画骰子</title>
<style type="text/css">
.box {
width: 200px;
height: 200px;
border: 2px solid #ccc;
border-radius: 10px;
padding: 20px;
display: flex;
justify-content: space-between;
}
.item {
display: block;
width: 40px;
height: 40px;
border-radius: 50%;
background-color: #666;
}
.item:nth-child(2) {
align-self: center;
}
.item:nth-child(3) {
align-self: flex-end;
}
</style>
</head>
<body>
<div class="box">
<span class="item"></span>
<span class="item"></span>
<span class="item"></span>
</div>
</body>
</html>
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# 定位
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>absote relative 定位问题</title>
<style type="text/css">
body {
margin: 20px;
}
.relative {
position: relative;
width: 400px;
height: 200px;
border: 1px solid #ccc;
top: 20px;
left: 50px;
}
.absolute {
position: absolute;
width: 200px;
height: 100px;
border: 1px solid blue;
top: 20px;
left: 50px;
}
</style>
</head>
<body>
<p>absolute 和 relative 定位问题</p>
<div class="relative">
<div class="absolute">
this is absolute
</div>
</div>
</body>
</html>
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# 水平对齐
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>水平对齐</title>
<style type="text/css">
.container {
border: 1px solid #ccc;
margin: 10px;
padding: 10px;
}
.item {
background-color: #ccc;
}
.container-1 {
text-align: center;
}
.container-2 .item {
width: 500px;
margin: auto;
}
.container-3 {
position: relative;
height: 100px;
}
.container-3 .item {
width: 300px;
height: 100px;
position: absolute;
left: 50%;
margin-left: -150px;
}
</style>
</head>
<body>
<div class="container container-1">
<span>一段文字</span>
</div>
<div class="container container-2">
<div class="item">
this is block item
</div>
</div>
<div class="container container-3">
<div class="item">
this is absolute item
</div>
</div>
</body>
</html>
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# 垂直对齐
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>垂直对齐</title>
<style type="text/css">
.container {
border: 1px solid #ccc;
margin: 10px;
padding: 10px;
height: 200px;
}
.item {
background-color: #ccc;
}
.container-1{
text-align: center;
line-height: 200px;
height: 200px;
}
.container-2 {
position: relative;
}
.container-2 .item {
width: 300px;
height: 100px;
position: absolute;
left: 50%;
margin-left: -150px;
top: 50%;
margin-top: -50px;
}
.container-3 {
position: relative;
}
.container-3 .item {
width: 200px;
height: 80px;
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%, -50%)
}
.container-4 {
position: relative;
}
.container-4 .item {
width: 100px;
height: 50px;
position: absolute;
top: 0;
left: 0;
bottom: 0;
right: 0;
margin: auto;
}
</style>
</head>
<body>
<div class="container container-1">
<span>一段文字</span>
</div>
<div class="container container-2">
<div class="item">
this is item
</div>
</div>
<div class="container container-3">
<div class="item">
this is item
</div>
</div>
<div class="container container-4">
<div class="item">
this is item
</div>
</div>
</body>
</html>
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