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title: 公共类 class
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toc: true
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---
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# 公共类
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> 公共类是 `layui.css` 中并不以组件形式存在的公共 `class` 选择器，而又能用于任何地方。
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<h2 id="base" lay-toc="{}" style="margin-bottom: 0;">普通类</h2>
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| className | 描述 |
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| --- | --- |
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| layui-main | 设置一个固定宽度为 `1160px` 的水平居中块 |
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| layui-border-box | 设置元素及其所有子元素均为 `box-sizing: content-box` 模型的容器 |
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| layui-clear | 清除前面的同级元素产生的浮动 |
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| layui-clear-space <sup>2.8+</sup> | 清除容器内的空白符 |
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| layui-inline | 设置元素为内联块状结构 |
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| layui-elip | 设置单行文本溢出并显示省略号 |
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| layui-unselect | 屏蔽选中 |
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| layui-disabled | 设置元素为不可点击状态 |
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| layui-circle | 设置元素为圆形。需确保 `width` 和 `height` 相同 |
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<h2 id="display" lay-toc="{hot: true}">显示隐藏</h2>
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| className | 描述 |
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| --- | --- |
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| layui-show | 设置元素为 `display: block` 可见状态 |
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| layui-hide | 设置元素为 `display: none` 隐藏状态，且不占用空间 |
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| layui-show-v | 设置元素为 `visibility: visible` 可见状态 |
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| layui-hide-v | 设置元素为 `visibility: hidden` 不可见状态，且依旧占用空间 |
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<h2 id="edge" lay-toc="{}">三角实体</h2>
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| className | 描述 |
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| --- | --- |
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| layui-edge | 定义一个三角形基础类 |
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| layui-edge-top | 设置向上三角 |
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| layui-edge-right | 设置向右三角 |
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| layui-edge-bottom | 设置向下三角 |
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| layui-edge-left | 设置向左三角 |
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示例
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<pre class="layui-code" lay-options="{preview: true, layout: ['preview', 'code'], tools: ['full']}">
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<textarea>
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向上三角：
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<i class="layui-edge layui-edge-top"></i>
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<i class="layui-edge layui-edge-top" style="border-bottom-color: black;"></i>
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<hr>
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向右三角：
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<i class="layui-edge layui-edge-right"></i>
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<i class="layui-edge layui-edge-right" style="border-left-color: black;"></i>
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<hr>
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向下三角：
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<i class="layui-edge layui-edge-bottom"></i>
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<i class="layui-edge layui-edge-bottom" style="border-top-color: black;"></i>
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<hr>
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向左三角：
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<i class="layui-edge layui-edge-left"></i>
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<i class="layui-edge layui-edge-left" style="border-right-color: black;"></i>
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</textarea>
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</pre>
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<h2 id="bg" lay-toc="{hot: true}">背景颜色</h2>
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| className | 背景色 | 预览 |
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| --- | --- | --- |
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| layui-bg-red | 红 | <div class="layui-bg-red"> </div> |
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| layui-bg-orange | 橙 | <div class="layui-bg-orange"> </div> |
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| layui-bg-green | 绿 | <div class="layui-bg-green"> </div> |
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| layui-bg-blue | 蓝 | <div class="layui-bg-blue"> </div> |
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| layui-bg-purple <sup>2.8+</sup> | 紫 | <div class="layui-bg-purple"> </div> |
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| layui-bg-black | 深 | <div class="layui-bg-black"> </div> |
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| layui-bg-gray | 浅 | <div class="layui-bg-gray"> </div> |
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<h2 id="font-size" lay-toc="{}">文字大小</h2>
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| className | 文字大小和预览 |
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| --- | --- |
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| layui-font-12 | <span class="layui-font-12">12px</span> |
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| layui-font-13 <sup>2.8+</sup> | <span class="layui-font-13">13px</span> |
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| layui-font-14 | <span class="layui-font-14">14px</span> |
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| layui-font-16 | <span class="layui-font-16">16px</span> |
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| layui-font-18 | <span class="layui-font-18">18px</span> |
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| layui-font-20 | <span class="layui-font-20">20px</span> |
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| layui-font-22 <sup>2.8+</sup> | <span class="layui-font-22">22px</span> |
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| layui-font-24 <sup>2.8+</sup> | <span class="layui-font-24">24px</span> |
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| layui-font-26 <sup>2.8+</sup> | <span class="layui-font-26">26px</span> |
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| layui-font-28 <sup>2.8+</sup> | <span class="layui-font-28">28px</span> |
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| layui-font-30 <sup>2.8+</sup> | <span class="layui-font-30">30px</span> |
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| layui-font-32 <sup>2.8+</sup> | <span class="layui-font-32">32px</span> |
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<h2 id="font-color" lay-toc="{}">文字颜色</h2>
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| className | 文字颜色和预览 |
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| --- | --- |
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| layui-font-red | <span class="layui-font-red">红</span> |
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| layui-font-orange | <span class="layui-font-orange">橙</span> |
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| layui-font-green | <span class="layui-font-green">绿</span> |
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| layui-font-blue | <span class="layui-font-blue">蓝</span> |
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| layui-font-purple <sup>2.8+</sup> | <span class="layui-font-purple">紫</span> |
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| layui-font-black | <span class="layui-font-black">深</span> |
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| layui-font-gray | <span class="layui-font-gray">浅</span> |
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<h2 id="text" lay-toc="{hot: true}">文档容器</h2>
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通过设置 `class="layui-text"` 定义一段包含标题、段落、列表、链接等组合的文档区域。
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<pre class="layui-code" lay-options="{preview: 'iframe', style: 'height: 535px;', layout: ['preview', 'code'], tools: ['full','window']}">
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<textarea>
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>文本区域演示 - Layui</title>
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<meta name="renderer" content="webkit">
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<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<link href="{{= d.layui.cdn.css }}" rel="stylesheet">
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</head>
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<body>
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<div class="layui-text" style="padding: 16px;">
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<h1>标题1</h1>
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<h2>标题2</h2>
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<h3>标题3</h3>
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<h4>标题4</h4>
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<h5>标题5</h5>
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<h6>标题6</h6>
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<hr>
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<ul>
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<li>列表1</li>
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<li>
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列表2
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<ul>
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<li>列表2-1</li>
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<li>列表2-2</li>
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<li>列表2-3</li>
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</ul>
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</li>
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<li>列表3</li>
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</ul>
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<hr>
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<ol>
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<li>列表1</li>
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<li>列表2</li>
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<li>列表3</li>
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</ol>
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<hr>
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<h2>标题2</h2>
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<p>段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1段落1</p>
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<p>段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2段落2</p>
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<blockquote>引用</blockquote>
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<p>这是一个包含<a href="javascript:;">超文本</a>和<strong>加粗文本</strong>的段落</p>
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</div>
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</body>
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</html>
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</textarea>
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</pre>
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