css3 flex布局实现平均分配元素的示例代码
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本文主要介绍了css3 flex布局实现平均分配元素，给自己留个笔记，也分享给大家，具体如下
例子一
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>flex 布局</title>
<style>
{
paddg:0;
marg:0;
}
body,html{
height: 100vh;
m-width: 800px;
}
.contaer{
display:flex;
flex-wrap:wrap;
display: -webkit-flex; / Safari /
}
.contaer>.item{
border: 1px solid black;
flex:1;
height:100px;
background: #abcdef;
}
</style>
</head>
<body>
<div class="contaer">
<div class="item"></div>
<ma class="item"></ma>
<div class="item"></div>
</div>
</body>
</html>
例子二
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>flex 布局</title>
<style>
{
paddg:0;
marg:0;
box-sizg: border-box;
}
body,html{
width: 100%;
height: 100vh;
m-width: 800px;
display:flex;
display: -webkit-flex; / Safari /
justify-content: center;
align-items: center;
}
.contaer{
width: 300px;
height: 300px;
display:flex;
display: -webkit-flex; / Safari /
flex-wrap: wrap;
}
.contaer>.item{
flex:0 0 33.3%;
height:100px;
background: #abcdef;
border: 1px solid red;
}
ma{
flex:0 0 33.3%;
height:100px;
background-color: #c;
border: 1px solid red;
}
</style>
</head>
<body>
<div class="contaer">
<div class="item">left</div>
<ma>ma</ma>
<div class="item">right</div>
<div class="item">left</div>
<ma>ma</ma>
<div class="item">right</div>
<div class="item">left</div>
<ma>ma</ma>
<div class="item">right</div>
</div>
</body>
</html>
flex:0 0 33.3% 相当于flex-basis:33.3%，使每一个元素的宽度占外层容器的33.3%，每行最多能够排开三个元素。
flex-wrap:wrap 表示每行填满时会自动换行。
例子三
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>flex 布局</title>
<style>
{
paddg:0;
marg:0;
box-sizg: border-box;
}
body,html{
width: 100%;
height: 100vh;
m-width: 800px;
display:flex;
display: -webkit-flex; / Safari /
justify-content: center;
align-items: center;
}
.contaer{
width: 300px;
height: 300px;
marg: 50px;
display:flex;
display: -webkit-flex; / Safari /
flex-wrap: wrap;
justify-content: space-between;
}
.contaer>.item{
flex:0 0 30%;
height:90px;
background: #abcdef;
border: 1px solid red;
}
ma{
flex:0 0 30%;
height:90px;
background-color: #c;
border: 1px solid red;
}
</style>
</head>
<body>
<div class="contaer">
<div class="item">left</div>
<ma>ma</ma>
<div class="item">right</div>
<div class="item">left</div>
<ma>ma</ma>
<div class="item">right</div>
<div class="item">left</div>
<ma>ma</ma>
<div class="item">right</div>
</div>
</body>
</html>
justify-content:space-between表示主轴方向的多余空间平均分配在两两item之间。
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