css 之 float 时给父元素 加 overflow: hidden
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>demo</title>
<style type="text/css" media="screen">
.button-list{
padding: .1rem;
overflow: hidden
}
.button-wrapper{
width:33.33%;
float: left
}
.button{
padding: .1rem;
border: .02rem solid #ccc;
text-align: center
}
</style>
</head>
<body>
<div>123</div>
<div class="button-list">
<div class="button-wrapper">
<div class="button">
北京
</div>
</div>
<div class="button-wrapper">
<div class="button">
北京
</div>
</div>
<div class="button-wrapper">
<div class="button">
北京
</div>
</div>
</div>
<div>123</div>
</body>
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