本文目录
元素的分类
相对定位绝对定位浮动其他属性参考
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
p{
width: 100px;
height: 100px;
border: 1px solid red;
display: inline-block;
}
span{
width: 100px;
height: 100px;
border: 1px solid red;
display: block;
}
</style>
</head>
<body>
<p>p</p>
<span>span</span>
</body>
</html>
p
、div
、h1-h6
、ul
、li
、ol
、dl
、dt
、dd
。span
、a
、em
。display
属性,时块级元素和行内元素进行转换。<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
div{
position: relative;
top: 20px;
left: 30px;
border: 1px solid red;
width: 100px;
height: 100px;
}
</style>
</head>
<body>
<div>
</div>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
div{
position: absolute;
top: 20px;
left: 20px;
border: 1px solid red;
width: 100px;
height: 100px;
}
</style>
</head>
<body>
<div>
</div>
<p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<!--
一旦有一个元素指定了浮动,后面的的元素也要指定浮动
-->
<style type="text/css">
.div1{
width: 100px;
height: 100px;
border: 1px solid red;
position: relative;
float: left;
}
.div2{
width: 100px;
height: 100px;
border: 1px solid blue;
}
.cls{
/*指定如何清除浮动*/
clear: both;
}
</style>
</head>
<body>
<div class="div1">
div1
</div>
<div class="cls">
</div>
<div class="div2">
div2
</div>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style type="text/css">
img{
position: absolute;
top: 0;
left: 0;
z-index: -1;
}
</style>
</head>
<body>
<p>这是一张图</p>
<img src="img/小区说事.png" />
</body>
</html>