导入css样式文件：是使用者本地的路径
<link rel="stylesheet" href="layui/css/layui.css" media="all">

按钮主题

默认按钮： class=“layui-btn”
原始按钮： class=“layui-btn layui-btn-primary”
百搭按钮： class=“layui-btn layui-btn-normal”
暖色按钮：class=“layui-btn layui-btn-warm”
警告按钮：class=“layui-btn layui-btn-danger”
禁用按钮：class=“layui-btn layui-btn-disabled”

<fieldset class="layui-elem-field site-demo-button" style="margin-top: 30px;height: 80px">
  <legend>按钮主题</legend>
  <div>
    <button type="button" class="layui-btn layui-btn-primary">原始按钮</button>
    <button type="button" class="layui-btn">默认按钮</button>
    <button type="button" class="layui-btn layui-btn-normal">百搭按钮</button>
    <button type="button" class="layui-btn layui-btn-warm">暖色按钮</button>
    <button type="button" class="layui-btn layui-btn-danger">警告按钮</button>
    <button type="button" class="layui-btn layui-btn-disabled">禁用按钮</button>
  </div>
</fieldset>

效果：

按钮尺寸

大型按钮：class=“layui-btn layui-btn-lg”
小型按钮：class=“layui-btn layui-btn-sm”
迷你按钮：class=“layui-btn layui-btn-xs”
默认按钮：class="layui-btn "
流体按钮：class=“layui-btn layui-btn-fluid”

 <fieldset class="layui-elem-field site-demo-button">
  <legend>按钮尺寸</legend>
  <div>
    <button type="button" class="layui-btn layui-btn-primary layui-btn-lg">大型按钮</button>
    <button type="button" class="layui-btn layui-btn-primary">默认按钮</button>
    <button type="button" class="layui-btn layui-btn-primary layui-btn-sm">小型按钮</button>
    <button type="button" class="layui-btn layui-btn-primary layui-btn-xs">迷你按钮</button>
    
    <br>
    
    <button type="button" class="layui-btn layui-btn-lg">大型按钮</button>
    <button type="button" class="layui-btn">默认按钮</button>
    <button type="button" class="layui-btn layui-btn-sm">小型按钮</button>
    <button type="button" class="layui-btn layui-btn-xs">迷你按钮</button>
    
    <br>
    
    <button type="button" class="layui-btn layui-btn-lg layui-btn-normal">大型按钮</button>
    <button type="button" class="layui-btn layui-btn-normal">默认按钮</button>
    <button type="button" class="layui-btn layui-btn-sm layui-btn-normal">小型按钮</button>
    <button type="button" class="layui-btn layui-btn-xs layui-btn-normal">迷你按钮</button>
    
     <br>
    
    <div style="width: 300px; margin: 0;">
      <button type="button" class="layui-btn layui-btn-fluid">流体按钮</button>
    </div>
  </div>
</fieldset>

效果：

图标按钮

图标：

<button type="button" class="layui-btn layui-btn-normal layui-btn-sm"><i class="layui-icon"></i></button>
    <button type="button" class="layui-btn layui-btn-normal layui-btn-sm"><i class="layui-icon"></i></button>
    <button type="button" class="layui-btn layui-btn-normal layui-btn-sm"><i class="layui-icon"></i></button>
    <button type="button" class="layui-btn layui-btn-normal layui-btn-sm"><i class="layui-icon"></i></button>
    <button type="button" class="layui-btn layui-btn-normal layui-btn-sm"><i class="layui-icon"></i></button>
    <button type="button" class="layui-btn layui-btn-normal layui-btn-sm"><i class="layui-icon"></i></button>

效果：

   
<div class="layui-btn-group">
  <button type="button" class="layui-btn layui-btn-primary layui-btn-sm">
    <i class="layui-icon">&#xe654;</i>
  </button>
  <button type="button" class="layui-btn layui-btn-primary layui-btn-sm">
    <i class="layui-icon">&#xe642;</i>
  </button>
  <button type="button" class="layui-btn layui-btn-primary layui-btn-sm">
    <i class="layui-icon">&#xe640;</i>
  </button>
</div>

效果：

图标：

圆角按钮

圆角按钮：class=“layui-btn layui-btn-radius”

<fieldset class="layui-elem-field site-demo-button">
  <legend>还可以是圆角按钮</legend>
  <div>
    <button type="button" class="layui-btn layui-btn-primary layui-btn-radius">原始按钮</button>
    <button type="button" class="layui-btn layui-btn-radius">默认按钮</button>
    <button type="button" class="layui-btn layui-btn-normal layui-btn-radius">百搭按钮</button>
    <button type="button" class="layui-btn layui-btn-warm layui-btn-radius">暖色按钮</button>
    <button type="button" class="layui-btn layui-btn-danger layui-btn-radius">警告按钮</button>
    <button type="button" class="layui-btn layui-btn-disabled layui-btn-radius">禁用按钮</button>
  </div>
</fieldset>

效果：

混搭按钮

<fieldset class="layui-elem-field site-demo-button">
  <legend>风格混搭的按钮</legend>
  <div>
    <button type="button" class="layui-btn layui-btn-lg layui-btn-primary layui-btn-radius">大型加圆角</button>
    <a href="http://www.layui.com/doc/element/button.html" class="layui-btn" target="_blank">跳转的按钮</a>
    <button type="button" class="layui-btn layui-btn-sm layui-btn-normal"><i class="layui-icon"></i> 删除</button>
    <button type="button" class="layui-btn layui-btn-xs layui-btn-disabled"><i class="layui-icon"></i> 分享</button>
  </div>
</fieldset>

效果：

按钮组

按钮组：class=“layui-btn-group”

<fieldset class="layui-elem-field site-demo-button">
  <legend>按钮组</legend>
  <div class="layui-btn-group">
    <button type="button" class="layui-btn">增加</button>
    <button type="button" class="layui-btn ">编辑</button>
    <button type="button" class="layui-btn">删除</button>
  </div>
  <div class="layui-btn-group">
    <button type="button" class="layui-btn layui-btn-sm"><i class="layui-icon"></i></button>
    <button type="button" class="layui-btn layui-btn-sm"><i class="layui-icon"></i></button>
    <button type="button" class="layui-btn layui-btn-sm"><i class="layui-icon"></i></button>
    <button type="button" class="layui-btn layui-btn-sm"><i class="layui-icon"></i></button>
  </div>
  <div class="layui-btn-group">
    <button type="button" class="layui-btn layui-btn-primary layui-btn-sm">文字</button>
    <button type="button" class="layui-btn layui-btn-primary layui-btn-sm"><i class="layui-icon"></i></button>
    <button type="button" class="layui-btn layui-btn-primary layui-btn-sm"><i class="layui-icon"></i></button>
    <button type="button" class="layui-btn layui-btn-primary layui-btn-sm"><i class="layui-icon"></i></button>
  </div>
</fieldset>    

效果：

按钮容器

按钮容器：class=“layui-btn-container”

<fieldset class="layui-elem-field layui-field-title">
            <legend>按钮容器</legend>
          </fieldset>
          
          <div class="layui-btn-container">
            <button type="button" class="layui-btn">按钮一</button> 
            <button type="button" class="layui-btn">按钮二</button> 
            <button type="button" class="layui-btn">按钮三</button> 
          </div>
          <div class="layui-btn-container">
            <button type="button" class="layui-btn">按钮一</button> 
            <button type="button" class="layui-btn">按钮二</button> 
            <button type="button" class="layui-btn">按钮三</button> 
          </div>

效果：