Bootstrap 4 .float-none类
如果要从元素中删除float，则Bootstrap4具有一个名为float-none的类。
这删除了浮动-
<div class="float-none"> This text is on the left (float removed). Default is left. </div>
设置无float类后，文本将在左侧移动，这也是默认的对齐设置。
您可以尝试运行以下代码以实现float-none类-
示例
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<script src="https://cdn.staticfile.org/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Demo</h2>
<div class="clearfix">
<div class="float-sm-left">This text is on the left (on small screen).</div><br>
<div class="float-md-left">This text is on the left (on medium screen).</div><br>
<div class="float-lg-left">This text is on the left (on large screen).</div><br>
<div class="float-xl-left">This text is on the left (on extra large screen).</div><br>
<div class="float-none">This text is on the left (default) (float removed).</div><br>
</div>
</div>
</body>
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