Three css methods to achieve DIV centering
This article mainly shares with you the method of realizing p centering in css. The css code is simple and easy to understand, very good, and has reference value. Friends who need it can refer to it. I hope it can help everyone.
Let me share with you the implementation code of p centering. The specific code is as follows:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>demo</title>
</head>
<body>
<style type="text/css">
.p1{ width: 100px; height: 100px; border: 1px solid #000000;}
.p2{ width:40px ; height: 40px; background-color: green;}
</style>
<p class="p1">
<p class="p2">
</p>
</p>
</body>
</html>
For the two p above, the implementation of p2 inside p1 is Centered display
1. Method 1
Using margin, the width of p1 minus the width of p2 is the value of p2margin-left: (100-40)/2=30
The height of p1 minus the height of p2 is the value of p2margin-top: (100-40)/2=30
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>demo</title>
</head>
<body>
<style type="text/css">
.p1{ width: 100px; height: 100px; border: 1px solid #000000;}
.p2{ width:40px ; height: 40px; background-color: green;}
.p22{
margin-left: 30px;margin-top: 30px;
}
</style>
<p class="p1">
<p class="p2 p22">
</p>
</p>
</body>
</html>
2. Method 2
Using the position attribute of css, set the top and left of p2 relative to p1 to 50%, then use margin-top to set it to the negative half of the height of p2 to pull it back, and use margin-left to set it to the negative half of the width to pull it back. Come back, set the css as follows
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>demo</title>
</head>
<body>
<style type="text/css">
.p1{ width: 100px; height: 100px; border: 1px solid #000000;}
.p2{ width:40px ; height: 40px; background-color: green;}
.p11{
position: relative;
}
.p22{
position: absolute;top:50%;left: 50%;margin-top: -20px;margin-left: -20px;
}
</style>
<p class="p1 p11">
<p class="p2 p22">
</p>
</p>
</body>
</html>
Three, method three
Still use the position attribute of css, as follows html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>demo</title>
</head>
<body>
<style type="text/css">
.p1{ width: 100px; height: 100px; border: 1px solid #000000;}
.p2{ width:40px ; height: 40px; background-color: green;}
.p11{
position: relative;
}
.p22{
position: absolute;margin:auto; top: 0;left: 0;right: 0;bottom: 0;
}
</style>
<p class="p1 p11">
<p class="p2 p22">
</p>
</p>
</body>
</html>
4. Method 4
Using the new attribute table-cell of css3
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>demo</title>
</head>
<body>
<style type="text/css">
.p1{ width: 100px; height: 100px; border: 1px solid #000000;}
.p2{ width:40px ; height: 40px; background-color: green;}
.p11{
display: table-cell;vertical-align: middle;
}
.p22{
margin: auto;
}
</style>
<p class="p1 p11">
<p class="p2 p22">
</p>
</p>
</body>
</html>
Another advantage of this method is that, The height of p2 does not need to be fixed, as follows
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>demo</title>
</head>
<body>
<style type="text/css">
.p1{ width: 100px; height: 100px; border: 1px solid #000000;}
.p2{ width:40px ; background-color: green;}
.p11{
display: table-cell;vertical-align: middle;
}
.p22{
margin: auto;
}
</style>
<p class="p1 p11">
<p class="p2 p22">
p居中方法
</p>
</p>
</body>
</html>
Related recommendations:
What should you pay attention to when centering a div in html
div centering: the most comprehensive summary of div centering methods
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