layui/docs/panel/index.md

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---
title: 面板 panel,card,collapse
toc: true
---
# 面板
> 面板是一个包含普通面板panel、卡片面板card、折叠面板collapse的集合
<h2 id="panel" lay-toc="{}" style="margin-bottom: 0;">常规面板</h2>
常规面板通常作为包裹其他元素的形式存在,如与基础菜单 `menu` 经常搭配使用。
<pre class="layui-code" lay-options="{preview: true, layout: ['preview', 'code'], tools: ['full']}">
<textarea>
<div class="layui-panel">
<div style="padding: 32px;">面板任意内容</div>
</div>
</textarea>
</pre>
<h2 id="card" lay-toc="{}">卡片面板</h2>
<pre class="layui-code" lay-options="{preview: true, layout: ['preview', 'code'], tools: ['full']}">
<textarea>
<div class="layui-bg-gray" style="padding: 16px;">
<div class="layui-row layui-col-space15">
<div class="layui-col-md6">
<div class="layui-card">
<div class="layui-card-header">卡片面板</div>
<div class="layui-card-body">
卡片式面板面板通常用于非白色背景色的主体内<br>
从而映衬出边框投影
</div>
</div>
</div>
<div class="layui-col-md6">
<div class="layui-card">
<div class="layui-card-header">卡片面板</div>
<div class="layui-card-body">
结合 layui 的栅格系统<br>
轻松实现响应式布局
</div>
</div>
</div>
</div>
</div>
</textarea>
</pre>
<h2 id="collapse" lay-toc="{hot: true}">折叠面板</h2>
<pre class="layui-code" lay-options="{preview: true, layout: ['preview', 'code'], tools: ['full'], done: function(obj){
obj.render();
}}">
<textarea>
<div class="layui-collapse">
<div class="layui-colla-item">
<div class="layui-colla-title">Collapse Title 1</div>
<div class="layui-colla-content">
<p>Content 1</p>
</div>
</div>
<div class="layui-colla-item">
<div class="layui-colla-title">Collapse Title 2</div>
<div class="layui-colla-content">
<p>Content 2</p>
</div>
</div>
<div class="layui-colla-item">
<div class="layui-colla-title">Collapse Title 3</div>
<div class="layui-colla-content">
<ul>
<li>Content list</li>
<li>Content list</li>
</ul>
</div>
</div>
<div class="layui-colla-item">
<div class="layui-colla-title">折叠面板的标题</div>
<div class="layui-colla-content">
<p>折叠面板的内容</p>
</div>
</div>
</div>
<!-- import layui -->
</textarea>
</pre>
<h3 id="accordion" lay-toc="{level: 2}">开启手风琴</h3>
在折叠面板容器上追加 `lay-accordion` 属性,开启手风琴效果,即点击展开当前面板的同时,折叠其他面板。
<pre class="layui-code" lay-options="{preview: true, layout: ['preview', 'code'], tools: ['full'], done: function(obj){
obj.render();
}}">
<textarea>
<div class="layui-collapse" lay-accordion>
<div class="layui-colla-item">
<div class="layui-colla-title">layui 主要面向哪些用户群体?</div>
<div class="layui-colla-content layui-show">
Layui 作为一个前端界面组件库,但面向的却主要是后端开发者。
<br>即无需涉足各类构建工具,只需面向浏览器本身,便可将页面所需呈现的元素与交互信手拈来。
</div>
</div>
<div class="layui-colla-item">
<div class="layui-colla-title">为什么我的眼里常含泪水?</div>
<div class="layui-colla-content">
<p>因为我对这片土地爱的深沉。</p>
</div>
</div>
<div class="layui-colla-item">
<div class="layui-colla-title">Why are my eyes always brimming with tears?</div>
<div class="layui-colla-content">
<p>Because I love this land so deeply…</p>
</div>
</div>
<div class="layui-colla-item">
<div class="layui-colla-title">一个折叠面板的标题?</div>
<div class="layui-colla-content">
<p>一个折叠面板的内容。</p>
</div>
</div>
</div>
<!-- import layui -->
</textarea>
</pre>
<h3 id="collapse-tree" lay-toc="{level: 2}">折叠面板嵌套</h3>
折叠面板内部支持无限嵌套,即折叠面板中再放置无限层级的折叠面板,以实现树形折叠结构。如:
<pre class="layui-code" lay-options="{preview: true, codeStyle: 'height:535px;', layout: ['preview', 'code'], tools: ['full'], done: function(obj){
obj.render();
}}">
<textarea>
<div class="layui-collapse" lay-accordion>
<div class="layui-colla-item">
<div class="layui-colla-title">文学家</div>
<div class="layui-colla-content layui-show">
<div class="layui-collapse" lay-accordion>
<div class="layui-colla-item">
<div class="layui-colla-title">唐代</div>
<div class="layui-colla-content layui-show">
<div class="layui-collapse" lay-accordion>
<div class="layui-colla-item">
<div class="layui-colla-title">杜甫</div>
<div class="layui-colla-content layui-show">
一代诗圣
</div>
</div>
<div class="layui-colla-item">
<div class="layui-colla-title">李白</div>
<div class="layui-colla-content">
<p>一代诗仙</p>
</div>
</div>
<div class="layui-colla-item">
<div class="layui-colla-title">王勃</div>
<div class="layui-colla-content">
<p>千古绝唱《滕王阁序》</p>
</div>
</div>
</div>
</div>
</div>
<div class="layui-colla-item">
<div class="layui-colla-title">宋代</div>
<div class="layui-colla-content">
<p>一个属于文人的时代</p>
</div>
</div>
<div class="layui-colla-item">
<div class="layui-colla-title">现代</div>
<div class="layui-colla-content">
<p>文学大师纷纷登场</p>
</div>
</div>
<div class="layui-colla-item">
<div class="layui-colla-title">当代</div>
<div class="layui-colla-content">
<p>文人、作家</p>
</div>
</div>
</div>
</div>
</div>
<div class="layui-colla-item">
<div class="layui-colla-title">科学家</div>
<div class="layui-colla-content">
<p>伟大的科学家</p>
</div>
</div>
<div class="layui-colla-item">
<div class="layui-colla-title">艺术家</div>
<div class="layui-colla-content">
<p>浑身散发着艺术细胞</p>
</div>
</div>
</div>
<!-- import layui -->
</textarea>
</pre>
<h3 id="collapse-render" lay-toc="{level: 2}">折叠面板渲染</h3>
`element.render('collapse', filter);`
- 参数 `'collapse'` : 渲染折叠面板的固定值
- 参数 `filter` : 对应折叠面板容器 `lay-filter` 的属性值
在元素加载完毕后,`element` 模块会自动对元素进行一次渲染。而当元素为动态插入时,需通过该方法完成初始化渲染。
<h3 id="on-collapse" lay-toc="{level: 2}">折叠面板事件</h3>
`element.on('collapse(filter)', callback)`
- 参数 `collapse(filter)` 是一个特定结构。
- `collapse` 为折叠面板点击事件固定值;
- `filter` 为导航容器属性 `lay-filter` 对应的值。
- 参数 `callback` 为事件执行时的回调函数,并返回一个 `object` 类型的参数。
<pre class="layui-code" lay-options="{preview: true, codeStyle: 'height:535px;', layout: ['code', 'preview'], tools: ['full'], done: function(obj){
obj.render();
}}">
<textarea>
<div class="layui-collapse" lay-filter="filter-collapse">
<div class="layui-colla-item">
<div class="layui-colla-title">Collapse Title 1</div>
<div class="layui-colla-content">
<p>Content 1</p>
</div>
</div>
<div class="layui-colla-item">
<div class="layui-colla-title">Collapse Title 2</div>
<div class="layui-colla-content">
<p>Content 2</p>
</div>
</div>
<div class="layui-colla-item">
<div class="layui-colla-title">Collapse Title 3</div>
<div class="layui-colla-content">
<ul>
<li>Content list</li>
<li>Content list</li>
</ul>
</div>
</div>
<div class="layui-colla-item">
<div class="layui-colla-title">折叠面板的标题</div>
<div class="layui-colla-content">
<p>折叠面板的内容</p>
</div>
</div>
</div>
<!-- import layui -->
<script>
layui.use(function(){
var element = layui.element;
var layer = layui.layer;
// 折叠面板点击事件
element.on('collapse(filter-collapse)', function(data){
console.log(data.show); // 得到当前面板的展开状态true or false
console.log(data.title); // 得到当前点击面板的标题区域对象
console.log(data.content); // 得到当前点击面板的内容区域对象
// 显示状态,仅用于演示
layer.msg('展开状态:'+ data.show);
});
});
</script>
</textarea>
</pre>