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<!DOCTYPE html>
<html lang="zh">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=0, minimal-ui">
<meta name="keywords" content="LightYear,LightYearAdmin,光年,后台模板,后台管理系统,光年HTML模板">
<meta name="description" content="Light Year Admin V4是一个基于Bootstrap v4.4.1的后台管理系统的HTML模板。">
<meta name="author" content="yinq">
<title>flex弹性布局 - 光年(Light Year Admin V4)后台管理系统模板</title>
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<meta name="apple-mobile-web-app-capable" content="yes">
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</head>
<body>
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<div id="lyear-preloader" class="loading">
<div class="ctn-preloader">
<div class="round_spinner">
<div class="spinner"></div>
<img src="images/loading-logo.png" alt="">
</div>
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</div>
<!--页面loading end-->
<div class="lyear-layout-web">
<div class="lyear-layout-container">
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<aside class="lyear-layout-sidebar">
<!-- logo -->
<div id="logo" class="sidebar-header">
<a href="index.html"><img src="images/logo-sidebar.png" title="LightYear" alt="LightYear" /></a>
</div>
<div class="lyear-layout-sidebar-info lyear-scroll">
<nav class="sidebar-main">
<ul class="nav-drawer">
<li class="nav-item"> <a href="index.html"><i class="mdi mdi-home"></i> <span>后台首页</span></a> </li>
<li class="nav-item nav-item-has-subnav">
<a href="javascript:void(0)"><i class="mdi mdi-palette"></i> <span>UI 元素</span></a>
<ul class="nav nav-subnav">
<li> <a href="lyear_ui_typography.html">排版</a> </li>
<li> <a href="lyear_ui_grid.html">栅格</a> </li>
<li> <a href="lyear_ui_icon.html">图标</a> </li>
<li> <a href="lyear_ui_alerts.html">警告框</a> </li>
<li> <a href="lyear_ui_buttons.html">按钮</a> </li>
<li> <a href="lyear_ui_button_group.html">按钮组</a> </li>
<li> <a href="lyear_ui_cards.html">卡片</a> </li>
<li> <a href="lyear_ui_tables.html">表格</a> </li>
<li> <a href="lyear_ui_modal.html">模态框</a> </li>
<li> <a href="lyear_ui_dropdown.html">下拉菜单</a> </li>
<li> <a href="lyear_ui_tooltips.html">工具提示</a> </li>
<li> <a href="lyear_ui_tabs.html">标签页</a> </li>
<li> <a href="lyear_ui_pagination.html">分页</a> </li>
<li> <a href="lyear_ui_popovers.html">POP提示</a> </li>
<li> <a href="lyear_ui_images.html">图片</a> </li>
<li> <a href="lyear_ui_badges.html">徽章</a> </li>
<li> <a href="lyear_ui_progress.html">进度条</a> </li>
<li> <a href="lyear_ui_list_group.html">列表组</a> </li>
<li> <a href="lyear_ui_media_object.html">媒体对象</a> </li>
<li> <a href="lyear_ui_navbar.html">导航栏</a> </li>
<li> <a href="lyear_ui_scrollspy.html">滚动监听</a> </li>
<li> <a href="lyear_ui_spinners.html">加载状态</a> </li>
<li> <a href="lyear_ui_toasts.html">消息弹窗</a> </li>
<li> <a href="lyear_ui_timeline.html">时光轴</a> </li>
<li> <a href="lyear_ui_other.html">其他</a> </li>
</ul>
</li>
<li class="nav-item nav-item-has-subnav">
<a href="javascript:void(0)"><i class="mdi mdi-format-align-justify"></i> <span>表单</span></a>
<ul class="nav nav-subnav">
<li> <a href="lyear_forms_elements.html">基本元素</a> </li>
<li> <a href="lyear_forms_input_group.html">输入框组</a> </li>
<li> <a href="lyear_forms_radio.html">单选框</a> </li>
<li> <a href="lyear_forms_checkbox.html">复选框</a> </li>
<li> <a href="lyear_forms_switches.html">开关</a> </li>
<li> <a href="lyear_forms_range.html">范围选择</a> </li>
</ul>
</li>
<li class="nav-item nav-item-has-subnav active open">
<a href="javascript:void(0)"><i class="mdi mdi-tools"></i> <span>工具类</span></a>
<ul class="nav nav-subnav">
<li> <a href="lyear_utilities_borders.html">边框</a> </li>
<li> <a href="lyear_utilities_colors.html">颜色</a> </li>
<li> <a href="lyear_utilities_display.html">显示属性</a> </li>
<li class="active"> <a href="lyear_utilities_flex.html">弹性布局</a> </li>
<li> <a href="lyear_utilities_float.html">浮动</a> </li>
<li> <a href="lyear_utilities_sizing.html">尺寸</a> </li>
<li> <a href="lyear_utilities_spacing.html">间隔</a> </li>
<li> <a href="lyear_utilities_stretched_link.html">延伸链接</a> </li>
<li> <a href="lyear_utilities_text.html">文本</a> </li>
<li> <a href="lyear_utilities_other.html">其他</a> </li>
</ul>
</li>
<li class="nav-item nav-item-has-subnav">
<a href="javascript:void(0)"><i class="mdi mdi-file-outline"></i> <span>示例页面</span></a>
<ul class="nav nav-subnav">
<li> <a href="lyear_pages_doc.html">文档列表</a> </li>
<li> <a href="lyear_pages_gallery.html">图库列表</a> </li>
<li> <a href="lyear_pages_config.html">网站配置</a> </li>
<li> <a href="lyear_pages_rabc.html">设置权限</a> </li>
<li> <a href="lyear_pages_add_doc.html">新增文档</a> </li>
<li> <a href="lyear_pages_guide.html">表单向导</a> </li>
<li> <a href="lyear_pages_data_table.html">表格插件</a> </li>
<li> <a href="lyear_pages_login_1.html" target="_blank">登录页面1</a> </li>
<li> <a href="lyear_pages_login_2.html" target="_blank">登录页面2</a> </li>
<li> <a href="lyear_pages_login_3.html" target="_blank">登录页面3</a> </li>
<li> <a href="lyear_pages_login_4.html" target="_blank">登录页面4</a> </li>
<li> <a href="lyear_pages_error.html" target="_blank">错误页面</a> </li>
</ul>
</li>
<li class="nav-item nav-item-has-subnav">
<a href="javascript:void(0)"><i class="mdi mdi-language-javascript"></i> <span>JS 插件</span></a>
<ul class="nav nav-subnav">
<li> <a href="lyear_js_datepicker.html">日期选取器</a> </li>
<li> <a href="lyear_js_colorpicker.html">选色器</a> </li>
<li> <a href="lyear_js_chartjs.html">Chart.js</a> </li>
<li> <a href="lyear_js_jconfirm.html">对话框</a> </li>
<li> <a href="lyear_js_tags_input.html">标签插件</a> </li>
<li> <a href="lyear_js_notify.html">通知消息</a> </li>
<li> <a href="lyear_js_maxlength.html">长度判断</a> </li>
<li> <a href="lyear_js_select.html">下拉选择</a> </li>
<li> <a href="lyear_js_fullcalendar.html">日程插件</a> </li>
<li> <a href="lyear_js_loading.html">loading插件</a> </li>
</ul>
</li>
<li class="nav-item nav-item-has-subnav">
<a href="javascript:void(0)"><i class="mdi mdi-menu"></i> <span>多级菜单</span></a>
<ul class="nav nav-subnav">
<li> <a href="#!">一级菜单</a> </li>
<li class="nav-item nav-item-has-subnav">
<a href="#!">一级菜单</a>
<ul class="nav nav-subnav">
<li> <a href="#!">二级菜单</a> </li>
<li class="nav-item nav-item-has-subnav">
<a href="#!">二级菜单</a>
<ul class="nav nav-subnav">
<li> <a href="#!">三级菜单</a> </li>
<li> <a href="#!">三级菜单</a> </li>
</ul>
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</ul>
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<p class="copyright">Copyright © 2019. <a target="_blank" href="http://lyear.itshubao.com">IT书包</a> All rights reserved.</p>
</div>
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</aside>
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<!--头部信息-->
<header class="lyear-layout-header">
<nav class="navbar">
<div class="navbar-left">
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<span class="lyear-toggler-bar"></span>
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<ul class="navbar-right d-flex align-items-center">
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<i class="mdi mdi-bell-outline"></i>
<span class="badge badge-danger">10</span>
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<div class="lyear-notifications-title clearfix" data-stopPropagation="true"><a href="#!" class="float-right">查看全部</a>你有 10 条未读消息</div>
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</li>
<!--切换主题配色-->
<li class="dropdown dropdown-skin">
<span data-toggle="dropdown" class="icon-item"><i class="mdi mdi-palette"></i></span>
<ul class="dropdown-menu dropdown-menu-right" data-stopPropagation="true">
<li class="drop-title"><p>主题</p></li>
<li class="drop-skin-li clearfix">
<span class="inverse">
<input type="radio" name="site_theme" value="default" id="site_theme_1" checked>
<label for="site_theme_1"></label>
</span>
<span>
<input type="radio" name="site_theme" value="dark" id="site_theme_2">
<label for="site_theme_2"></label>
</span>
<span>
<input type="radio" name="site_theme" value="translucent" id="site_theme_3">
<label for="site_theme_3"></label>
</span>
</li>
<li class="drop-title"><p>LOGO</p></li>
<li class="drop-skin-li clearfix">
<span class="inverse">
<input type="radio" name="logo_bg" value="default" id="logo_bg_1" checked>
<label for="logo_bg_1"></label>
</span>
<span>
<input type="radio" name="logo_bg" value="color_2" id="logo_bg_2">
<label for="logo_bg_2"></label>
</span>
<span>
<input type="radio" name="logo_bg" value="color_3" id="logo_bg_3">
<label for="logo_bg_3"></label>
</span>
<span>
<input type="radio" name="logo_bg" value="color_4" id="logo_bg_4">
<label for="logo_bg_4"></label>
</span>
<span>
<input type="radio" name="logo_bg" value="color_5" id="logo_bg_5">
<label for="logo_bg_5"></label>
</span>
<span>
<input type="radio" name="logo_bg" value="color_6" id="logo_bg_6">
<label for="logo_bg_6"></label>
</span>
<span>
<input type="radio" name="logo_bg" value="color_7" id="logo_bg_7">
<label for="logo_bg_7"></label>
</span>
<span>
<input type="radio" name="logo_bg" value="color_8" id="logo_bg_8">
<label for="logo_bg_8"></label>
</span>
</li>
<li class="drop-title"><p>头部</p></li>
<li class="drop-skin-li clearfix">
<span class="inverse">
<input type="radio" name="header_bg" value="default" id="header_bg_1" checked>
<label for="header_bg_1"></label>
</span>
<span>
<input type="radio" name="header_bg" value="color_2" id="header_bg_2">
<label for="header_bg_2"></label>
</span>
<span>
<input type="radio" name="header_bg" value="color_3" id="header_bg_3">
<label for="header_bg_3"></label>
</span>
<span>
<input type="radio" name="header_bg" value="color_4" id="header_bg_4">
<label for="header_bg_4"></label>
</span>
<span>
<input type="radio" name="header_bg" value="color_5" id="header_bg_5">
<label for="header_bg_5"></label>
</span>
<span>
<input type="radio" name="header_bg" value="color_6" id="header_bg_6">
<label for="header_bg_6"></label>
</span>
<span>
<input type="radio" name="header_bg" value="color_7" id="header_bg_7">
<label for="header_bg_7"></label>
</span>
<span>
<input type="radio" name="header_bg" value="color_8" id="header_bg_8">
<label for="header_bg_8"></label>
</span>
</li>
<li class="drop-title"><p>侧边栏</p></li>
<li class="drop-skin-li clearfix">
<span class="inverse">
<input type="radio" name="sidebar_bg" value="default" id="sidebar_bg_1" checked>
<label for="sidebar_bg_1"></label>
</span>
<span>
<input type="radio" name="sidebar_bg" value="color_2" id="sidebar_bg_2">
<label for="sidebar_bg_2"></label>
</span>
<span>
<input type="radio" name="sidebar_bg" value="color_3" id="sidebar_bg_3">
<label for="sidebar_bg_3"></label>
</span>
<span>
<input type="radio" name="sidebar_bg" value="color_4" id="sidebar_bg_4">
<label for="sidebar_bg_4"></label>
</span>
<span>
<input type="radio" name="sidebar_bg" value="color_5" id="sidebar_bg_5">
<label for="sidebar_bg_5"></label>
</span>
<span>
<input type="radio" name="sidebar_bg" value="color_6" id="sidebar_bg_6">
<label for="sidebar_bg_6"></label>
</span>
<span>
<input type="radio" name="sidebar_bg" value="color_7" id="sidebar_bg_7">
<label for="sidebar_bg_7"></label>
</span>
<span>
<input type="radio" name="sidebar_bg" value="color_8" id="sidebar_bg_8">
<label for="sidebar_bg_8"></label>
</span>
</li>
</ul>
</li>
<!--切换主题配色-->
<li class="dropdown dropdown-profile">
<a href="javascript:void(0)" data-toggle="dropdown" class="dropdown-toggle">
<img class="img-avatar img-avatar-48 m-r-10" src="images/users/avatar.jpg" alt="笔下光年" />
<span>笔下光年</span>
</a>
<ul class="dropdown-menu dropdown-menu-right">
<li>
<a class="dropdown-item" href="lyear_pages_profile.html"><i class="mdi mdi-account"></i> 个人信息</a>
</li>
<li>
<a class="dropdown-item" href="lyear_pages_edit_pwd.html"><i class="mdi mdi-lock-outline"></i> 修改密码</a>
</li>
<li>
<a class="dropdown-item" href="javascript:void(0)"><i class="mdi mdi-delete"></i> 清空缓存</a>
</li>
<li class="dropdown-divider"></li>
<li>
<a class="dropdown-item" href="lyear_pages_login_1.html"><i class="mdi mdi-logout-variant"></i> 退出登录</a>
</li>
</ul>
</li>
</ul>
</nav>
</header>
<!--End 头部信息-->
<!--页面主要内容-->
<main class="lyear-layout-content">
<div class="container-fluid p-t-15">
<div class="row">
<div class="col-lg-12">
<div class="card">
<header class="card-header"><div class="card-title">flex弹性布局</div></header>
<div class="card-body">
<h6>启用flex行为</h6>
<p>使用 <code>display</code> 通用属性来创建一个flxbox容器，并将 直属内部子元素 转换为flex属性。 flex元素的容器和子项目可以通过额外的flex属性定义来实现进一步修改。</p>
<div class="border-example">
<div class="d-flex p-2 border-highlight">I'm a flexbox container!</div>
</div>
<pre><div class="d-flex p-2 border-highlight">I'm a flexbox container!</div></pre>
<div class="callout callout-warning"><code>border-highlight</code> 类是为了标清楚div元素当前的范围演示使用</div>
<div class="border-example">
<div class="d-inline-flex p-2 border-highlight">I'm an inline flexbox container!</div>
</div>
<pre><div class="d-inline-flex p-2 border-highlight">I'm an inline flexbox container!</div></pre>
<p>响应式变化也存在于 <code>.d-flex</code> 和 <code>.d-inline-flex</code> 这两个通用类上</p>
<ul>
<li><code>.d-flex</code></li>
<li><code>.d-inline-flex</code></li>
<li><code>.d-sm-flex</code></li>
<li><code>.d-sm-inline-flex</code></li>
<li><code>.d-md-flex</code></li>
<li><code>.d-md-inline-flex</code></li>
<li><code>.d-lg-flex</code></li>
<li><code>.d-lg-inline-flex</code></li>
<li><code>.d-xl-flex</code></li>
<li><code>.d-xl-inline-flex</code></li>
</ul>
<h6>方向</h6>
<p>基于系统提供的通用样式定义，可以设定flex的容器与内部flex元素的方向，在大多数情况下你可以忽略水平的class样式定义，因为浏览器的默认值是 <code>row</code>。但在比如响应式布局时，可能需要进行显式设定此值。</p>
<p>浏览器预默认值下，使用 <code>.flex-row</code> 可设置子元素水平方向排版呈现，或者使用<code>.flex-row-reverse</code> 可实现元素在水平上作反方向排列（右对齐、从右到左布局）。</p>
<div class="border-example">
<div class="d-flex flex-row border-highlight mb-3">
<div class="p-2 border-highlight">Flex item 1</div>
<div class="p-2 border-highlight">Flex item 2</div>
<div class="p-2 border-highlight">Flex item 3</div>
</div>
<div class="d-flex flex-row-reverse border-highlight">
<div class="p-2 border-highlight">Flex item 1</div>
<div class="p-2 border-highlight">Flex item 2</div>
<div class="p-2 border-highlight">Flex item 3</div>
</div>
</div>
<pre><div class="d-flex flex-row border-highlight mb-3">
<div class="p-2 border-highlight">Flex item 1</div>
<div class="p-2 border-highlight">Flex item 2</div>
<div class="p-2 border-highlight">Flex item 3</div>
</div>
<div class="d-flex flex-row-reverse border-highlight">
<div class="p-2 border-highlight">Flex item 1</div>
<div class="p-2 border-highlight">Flex item 2</div>
<div class="p-2 border-highlight">Flex item 3</div>
</div></pre>
<p>使用 <code>.flex-column</code> 设置垂直方向布局，或使用 <code>.flex-column-reverse</code> 实现垂直方向的反转布局（从底向上铺开）。</p>
<div class="border-example">
<div class="d-flex flex-column border-highlight mb-3">
<div class="p-2 border-highlight">Flex item 1</div>
<div class="p-2 border-highlight">Flex item 2</div>
<div class="p-2 border-highlight">Flex item 3</div>
</div>
<div class="d-flex flex-column-reverse border-highlight">
<div class="p-2 border-highlight">Flex item 1</div>
<div class="p-2 border-highlight">Flex item 2</div>
<div class="p-2 border-highlight">Flex item 3</div>
</div>
</div>
<pre><div class="d-flex flex-column border-highlight mb-3">
<div class="p-2 border-highlight">Flex item 1</div>
<div class="p-2 border-highlight">Flex item 2</div>
<div class="p-2 border-highlight">Flex item 3</div>
</div>
<div class="d-flex flex-column-reverse border-highlight">
<div class="p-2 border-highlight">Flex item 1</div>
<div class="p-2 border-highlight">Flex item 2</div>
<div class="p-2 border-highlight">Flex item 3</div>
</div></pre>
<p><code>flex-direction</code> 的响应式属性规范：</p>
<ul>
<li><code>.flex-row</code></li>
<li><code>.flex-row-reverse</code></li>
<li><code>.flex-column</code></li>
<li><code>.flex-column-reverse</code></li>
<li><code>.flex-sm-row</code></li>
<li><code>.flex-sm-row-reverse</code></li>
<li><code>.flex-sm-column</code></li>
<li><code>.flex-sm-column-reverse</code></li>
<li><code>.flex-md-row</code></li>
<li><code>.flex-md-row-reverse</code></li>
<li><code>.flex-md-column</code></li>
<li><code>.flex-md-column-reverse</code></li>
<li><code>.flex-lg-row</code></li>
<li><code>.flex-lg-row-reverse</code></li>
<li><code>.flex-lg-column</code></li>
<li><code>.flex-lg-column-reverse</code></li>
<li><code>.flex-xl-row</code></li>
<li><code>.flex-xl-row-reverse</code></li>
<li><code>.flex-xl-column</code></li>
<li><code>.flex-xl-column-reverse</code></li>
</ul>
<h6>内容对齐</h6>
<p>使用flexbox弹性布局容器上的 <code>justify-content-*</code> 通用样式可以改变flx项目在主轴上的对齐（x轴开始，如果 <code>flex-direction: column</code> 则为y轴)，或选方向（值）包括： <code>start</code> (浏览器默认值),、<code>end</code>、 <code>center</code>、 <code>between</code>、 <code>around</code>。</p>
<div class="border-example">
<div class="d-flex justify-content-start border-highlight mb-3">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex justify-content-end border-highlight mb-3">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex justify-content-center border-highlight mb-3">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex justify-content-between border-highlight mb-3">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex justify-content-around border-highlight">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
</div>
<pre><div class="d-flex justify-content-start border-highlight mb-3">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex justify-content-end border-highlight mb-3">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex justify-content-center border-highlight mb-3">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex justify-content-between border-highlight mb-3">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex justify-content-around border-highlight">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div></pre>
<p><code>justify-content-*</code> 样式也通用存在响应式属性规范：</p>
<ul>
<li><code>.justify-content-start</code></li>
<li><code>.justify-content-end</code></li>
<li><code>.justify-content-center</code></li>
<li><code>.justify-content-between</code></li>
<li><code>.justify-content-around</code></li>
<li><code>.justify-content-sm-start</code></li>
<li><code>.justify-content-sm-end</code></li>
<li><code>.justify-content-sm-center</code></li>
<li><code>.justify-content-sm-between</code></li>
<li><code>.justify-content-sm-around</code></li>
<li><code>.justify-content-md-start</code></li>
<li><code>.justify-content-md-end</code></li>
<li><code>.justify-content-md-center</code></li>
<li><code>.justify-content-md-between</code></li>
<li><code>.justify-content-md-around</code></li>
<li><code>.justify-content-lg-start</code></li>
<li><code>.justify-content-lg-end</code></li>
<li><code>.justify-content-lg-center</code></li>
<li><code>.justify-content-lg-between</code></li>
<li><code>.justify-content-lg-around</code></li>
<li><code>.justify-content-xl-start</code></li>
<li><code>.justify-content-xl-end</code></li>
<li><code>.justify-content-xl-center</code></li>
<li><code>.justify-content-xl-between</code></li>
<li><code>.justify-content-xl-around</code></li>
</ul>
<h6>对齐项目</h6>
<p>使用 <code>align-items-*</code> 通用样式可以在flxbox容器上实现flex项目的对齐（y轴开始，如果选择 <code>flex-direction: column</code> 则从x轴开始)，可选参数有： <code>start</code>、<code>end</code>、 <code>center</code>、<code>baseline</code>、 <code>stretch</code> (浏览器默认值)。</p>
<div class="border-example">
<div class="bd-example">
<div class="d-flex align-items-start border-highlight mb-3" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex align-items-end border-highlight mb-3" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex align-items-center border-highlight mb-3" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex align-items-baseline border-highlight mb-3" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex align-items-stretch border-highlight" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
</div>
</div>
<pre><div class="bd-example">
<div class="d-flex align-items-start border-highlight mb-3" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex align-items-end border-highlight mb-3" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex align-items-center border-highlight mb-3" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex align-items-baseline border-highlight mb-3" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex align-items-stretch border-highlight" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
</div></pre>
<p><code>align-items</code> 的响应式属性规范：</p>
<ul>
<li><code>.align-items-start</code></li>
<li><code>.align-items-end</code></li>
<li><code>.align-items-center</code></li>
<li><code>.align-items-baseline</code></li>
<li><code>.align-items-stretch</code></li>
<li><code>.align-items-sm-start</code></li>
<li><code>.align-items-sm-end</code></li>
<li><code>.align-items-sm-center</code></li>
<li><code>.align-items-sm-baseline</code></li>
<li><code>.align-items-sm-stretch</code></li>
<li><code>.align-items-md-start</code></li>
<li><code>.align-items-md-end</code></li>
<li><code>.align-items-md-center</code></li>
<li><code>.align-items-md-baseline</code></li>
<li><code>.align-items-md-stretch</code></li>
<li><code>.align-items-lg-start</code></li>
<li><code>.align-items-lg-end</code></li>
<li><code>.align-items-lg-center</code></li>
<li><code>.align-items-lg-baseline</code></li>
<li><code>.align-items-lg-stretch</code></li>
<li><code>.align-items-xl-start</code></li>
<li><code>.align-items-xl-end</code></li>
<li><code>.align-items-xl-center</code></li>
<li><code>.align-items-xl-baseline</code></li>
<li><code>.align-items-xl-stretch</code></li>
</ul>
<h6>自对齐</h6>
<p>使用 <code>align-self-*</code> 通用样式可以使用flexbox上的项目单独改变在横轴上的对齐方式（y值开始，如果 <code>flex-direction: column</code> 则为x轴开始)，其拥有与 <code>align-items</code> 相同的可选子项: <code>start</code>、 <code>end</code>、<code>center</code>、 <code>baseline</code>、 or <code>stretch</code> (浏览器默认值)。</p>
<div class="border-example">
<div class="d-flex border-highlight mb-3" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="align-self-start p-2 border-highlight">Aligned flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex border-highlight mb-3" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="align-self-end p-2 border-highlight">Aligned flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex border-highlight mb-3" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="align-self-center p-2 border-highlight">Aligned flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex border-highlight mb-3" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="align-self-baseline p-2 border-highlight">Aligned flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex border-highlight" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="align-self-stretch p-2 border-highlight">Aligned flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
</div>
<pre><div class="d-flex border-highlight mb-3" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="align-self-start p-2 border-highlight">Aligned flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex border-highlight mb-3" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="align-self-end p-2 border-highlight">Aligned flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex border-highlight mb-3" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="align-self-center p-2 border-highlight">Aligned flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex border-highlight mb-3" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="align-self-baseline p-2 border-highlight">Aligned flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex border-highlight" style="height: 100px">
<div class="p-2 border-highlight">Flex item</div>
<div class="align-self-stretch p-2 border-highlight">Aligned flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div></pre>
<p><code>align-self</code> 的响应式属性规范：</p>
<ul>
<li><code>.align-self-start</code></li>
<li><code>.align-self-end</code></li>
<li><code>.align-self-center</code></li>
<li><code>.align-self-baseline</code></li>
<li><code>.align-self-stretch</code></li>
<li><code>.align-self-sm-start</code></li>
<li><code>.align-self-sm-end</code></li>
<li><code>.align-self-sm-center</code></li>
<li><code>.align-self-sm-baseline</code></li>
<li><code>.align-self-sm-stretch</code></li>
<li><code>.align-self-md-start</code></li>
<li><code>.align-self-md-end</code></li>
<li><code>.align-self-md-center</code></li>
<li><code>.align-self-md-baseline</code></li>
<li><code>.align-self-md-stretch</code></li>
<li><code>.align-self-lg-start</code></li>
<li><code>.align-self-lg-end</code></li>
<li><code>.align-self-lg-center</code></li>
<li><code>.align-self-lg-baseline</code></li>
<li><code>.align-self-lg-stretch</code></li>
<li><code>.align-self-xl-start</code></li>
<li><code>.align-self-xl-end</code></li>
<li><code>.align-self-xl-center</code></li>
<li><code>.align-self-xl-baseline</code></li>
<li><code>.align-self-xl-stretch</code></li>
</ul>
<h6>填充</h6>
<p>对一系列同级元素使用 <code>.flex-fill</code> 类，在占用所有可用水平空间的同时，将它们强制设置为与其内容相等的宽度（如果其内容不超过边框，则为相等的宽度）。</p>
<div class="border-example">
<div class="d-flex border-highlight">
<div class="p-2 flex-fill border-highlight">Flex item with a lot of content</div>
<div class="p-2 flex-fill border-highlight">Flex item</div>
<div class="p-2 flex-fill border-highlight">Flex item</div>
</div>
</div>
<pre><div class="d-flex border-highlight">
<div class="p-2 flex-fill border-highlight">Flex item with a lot of content</div>
<div class="p-2 flex-fill border-highlight">Flex item</div>
<div class="p-2 flex-fill border-highlight">Flex item</div>
</div></pre>
<p><code>flex-fill</code> 也存在响应性变化。</p>
<ul>
<li><code>.flex-fill</code></li>
<li><code>.flex-sm-fill</code></li>
<li><code>.flex-md-fill</code></li>
<li><code>.flex-lg-fill</code></li>
<li><code>.flex-xl-fill</code></li>
</ul>
<h6>扩大和收缩</h6>
<p>使用 <code>.flex-grow-*</code> 实用程序切换flex项的增长能力以填充可用空间。在下面的示例中，<code>.flex-grow-1</code> 元素使用了它所能使用的所有可用空间，同时允许其余两个flex项使用它们所需的空间。</p>
<div class="border-example">
<div class="d-flex border-highlight">
<div class="p-2 flex-grow-1 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Third flex item</div>
</div>
</div>
<pre><div class="d-flex border-highlight">
<div class="p-2 flex-grow-1 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Third flex item</div>
</div></pre>
<p>使用 <code>.flex-shrink-*</code> 实用程序在必要时切换flex项的收缩能力。在下面的示例中，使用 <code>.flex-shrink-1</code> 的第二个flex项被强制将其内容包装到一个新行，“收缩”以允许使用 <code>.w-100</code> 的前一个flex项有更多空间。</p>
<div class="border-example">
<div class="d-flex border-highlight">
<div class="p-2 w-100 border-highlight">Flex item</div>
<div class="p-2 flex-shrink-1 border-highlight">Flex item</div>
</div>
</div>
<pre><div class="d-flex border-highlight">
<div class="p-2 w-100 border-highlight">Flex item</div>
<div class="p-2 flex-shrink-1 border-highlight">Flex item</div>
</div></pre>
<p><code>flex-grow</code> 和 <code>flex-shrink</code> 也存在响应性变化。</p>
<ul>
<li><code>.flex-{grow|shrink}-0</code></li>
<li><code>.flex-{grow|shrink}-1</code></li>
<li><code>.flex-sm-{grow|shrink}-0</code></li>
<li><code>.flex-sm-{grow|shrink}-1</code></li>
<li><code>.flex-md-{grow|shrink}-0</code></li>
<li><code>.flex-md-{grow|shrink}-1</code></li>
<li><code>.flex-lg-{grow|shrink}-0</code></li>
<li><code>.flex-lg-{grow|shrink}-1</code></li>
<li><code>.flex-xl-{grow|shrink}-0</code></li>
<li><code>.flex-xl-{grow|shrink}-1</code></li>
</ul>
<h6>自浮动</h6>
<p>当你将flex对齐与auto margin混在一起的时候，flexbox也能正常运行。以下是通过自动manrgin来控制flex项目的三种示例，分别是预设（无margin）、向右推两个项目(<code>.mr-auto</code>)、向左推两个项目 (<code>.ml-auto</code>)：</p>
<div class="callout callout-danger">
<strong>不幸的是，IE10和IE11不能正确支持在父层具有非默认的 <code>justify-content</code> 值自边距浮动auto margin</strong> ，<a href="https://stackoverflow.com/a/37535548" target="_blank">可查阅 StackOverflow对此现象的解答</a> 了解更多细节。
</div>
<div class="border-example">
<div class="d-flex border-highlight mb-3">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex border-highlight mb-3">
<div class="mr-auto p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex border-highlight mb-3">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="ml-auto p-2 border-highlight">Flex item</div>
</div>
</div>
<pre><div class="d-flex border-highlight mb-3">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex border-highlight mb-3">
<div class="mr-auto p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex border-highlight mb-3">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="ml-auto p-2 border-highlight">Flex item</div>
</div></pre>
<h6>结合align-items</h6>
<p>结合 <code>align-items</code>、 <code>flex-direction: column</code>、 <code>margin-top: auto</code> 或 <code>margin-bottom: auto</code>，可以垂直移动一个flex子容器到顶部或底部。</p>
<div class="border-example">
<div class="d-flex align-items-start flex-column border-highlight mb-3" style="height: 200px;">
<div class="mb-auto p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex align-items-end flex-column border-highlight mb-3" style="height: 200px;">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="mt-auto p-2 border-highlight">Flex item</div>
</div>
</div>
<pre><div class="d-flex align-items-start flex-column border-highlight mb-3" style="height: 200px;">
<div class="mb-auto p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
<div class="d-flex align-items-end flex-column border-highlight mb-3" style="height: 200px;">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="mt-auto p-2 border-highlight">Flex item</div>
</div></pre>
<h6>包裹</h6>
<p>改变flex项目在flex容器中的包裹方式（可以实现弹性布局），其中包括无包裹 <code>.flex-nowrap</code>（浏览器默认）、包裹 <code>.flex-wrap</code>,，或者反向包裹 <code>.flex-wrap-reverse</code>。</p>
<div class="border-example">
<div class="d-flex flex-nowrap border-highlight" style="width: 8rem;">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
</div>
<pre><div class="d-flex flex-nowrap border-highlight" style="width: 8rem;">
...
</div></pre>
<div class="border-example">
<div class="d-flex flex-wrap border-highlight">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
</div>
<pre><div class="d-flex flex-wrap border-highlight">
...
</div></pre>
<div class="border-example">
<div class="d-flex flex-wrap-reverse border-highlight">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
</div>
<pre><div class="d-flex flex-wrap-reverse border-highlight">
...
</div></pre>
<p><code>flex-wrap</code> 的响应式规范：</p>
<ul>
<li><code>.flex-nowrap</code></li>
<li><code>.flex-wrap</code></li>
<li><code>.flex-wrap-reverse</code></li>
<li><code>.flex-sm-nowrap</code></li>
<li><code>.flex-sm-wrap</code></li>
<li><code>.flex-sm-wrap-reverse</code></li>
<li><code>.flex-md-nowrap</code></li>
<li><code>.flex-md-wrap</code></li>
<li><code>.flex-md-wrap-reverse</code></li>
<li><code>.flex-lg-nowrap</code></li>
<li><code>.flex-lg-wrap</code></li>
<li><code>.flex-lg-wrap-reverse</code></li>
<li><code>.flex-xl-nowrap</code></li>
<li><code>.flex-xl-wrap</code></li>
<li><code>.flex-xl-wrap-reverse</code></li>
</ul>
<h6>排序</h6>
<p>使用一些 <code>order</code> 实用程序更改特定flex项的可视顺序。我们只提供了使一个项成为第一个或最后一个项的选项，以及使用DOM顺序的重置选项。当 <code>order</code> 接受任何整数值（例如5），因此对于需要的任何额外值需要自定义CSS。</p>
<div class="border-example">
<div class="d-flex flex-nowrap border-highlight">
<div class="order-3 p-2 border-highlight">First flex item</div>
<div class="order-2 p-2 border-highlight">Second flex item</div>
<div class="order-1 p-2 border-highlight">Third flex item</div>
</div>
</div>
<pre><div class="d-flex flex-nowrap border-highlight">
<div class="order-3 p-2 border-highlight">First flex item</div>
<div class="order-2 p-2 border-highlight">Second flex item</div>
<div class="order-1 p-2 border-highlight">Third flex item</div>
</div></pre>
<p><code>order</code> 也存在响应变化。</p>
<ul>
<li><code>.order-0</code></li>
<li><code>.order-1</code></li>
<li><code>.order-2</code></li>
<li><code>.order-3</code></li>
<li><code>.order-4</code></li>
<li><code>.order-5</code></li>
<li><code>.order-6</code></li>
<li><code>.order-7</code></li>
<li><code>.order-8</code></li>
<li><code>.order-9</code></li>
<li><code>.order-10</code></li>
<li><code>.order-11</code></li>
<li><code>.order-12</code></li>
<li><code>.order-sm-0</code></li>
<li><code>.order-sm-1</code></li>
<li><code>.order-sm-2</code></li>
<li><code>.order-sm-3</code></li>
<li><code>.order-sm-4</code></li>
<li><code>.order-sm-5</code></li>
<li><code>.order-sm-6</code></li>
<li><code>.order-sm-7</code></li>
<li><code>.order-sm-8</code></li>
<li><code>.order-sm-9</code></li>
<li><code>.order-sm-10</code></li>
<li><code>.order-sm-11</code></li>
<li><code>.order-sm-12</code></li>
<li><code>.order-md-0</code></li>
<li><code>.order-md-1</code></li>
<li><code>.order-md-2</code></li>
<li><code>.order-md-3</code></li>
<li><code>.order-md-4</code></li>
<li><code>.order-md-5</code></li>
<li><code>.order-md-6</code></li>
<li><code>.order-md-7</code></li>
<li><code>.order-md-8</code></li>
<li><code>.order-md-9</code></li>
<li><code>.order-md-10</code></li>
<li><code>.order-md-11</code></li>
<li><code>.order-md-12</code></li>
<li><code>.order-lg-0</code></li>
<li><code>.order-lg-1</code></li>
<li><code>.order-lg-2</code></li>
<li><code>.order-lg-3</code></li>
<li><code>.order-lg-4</code></li>
<li><code>.order-lg-5</code></li>
<li><code>.order-lg-6</code></li>
<li><code>.order-lg-7</code></li>
<li><code>.order-lg-8</code></li>
<li><code>.order-lg-9</code></li>
<li><code>.order-lg-10</code></li>
<li><code>.order-lg-11</code></li>
<li><code>.order-lg-12</code></li>
<li><code>.order-xl-0</code></li>
<li><code>.order-xl-1</code></li>
<li><code>.order-xl-2</code></li>
<li><code>.order-xl-3</code></li>
<li><code>.order-xl-4</code></li>
<li><code>.order-xl-5</code></li>
<li><code>.order-xl-6</code></li>
<li><code>.order-xl-7</code></li>
<li><code>.order-xl-8</code></li>
<li><code>.order-xl-9</code></li>
<li><code>.order-xl-10</code></li>
<li><code>.order-xl-11</code></li>
<li><code>.order-xl-12</code></li>
</ul>
<h6>内容对齐</h6>
<p>使用flexbox容器上的 <code>align-content</code> 通用样式定义，可以将flex物价于横轴上 <em>一起对齐</em>，可选方向有 <code>start</code> (浏览器默认值)、 <code>end</code>、 <code>center</code>、 <code>between</code>、 <code>around</code>、 <code>stretch</code>。为了展现这些效果，下面实例我们已经实施了<code>flex-wrap: wrap</code>定义并增加了很多子项目的数量，如下所示：</p>
<div class="callout callout-info">此属性对于单行的Flex项目没有影响。</div>
<div class="border-example">
<div class="d-flex align-content-start flex-wrap border-highlight mb-3" style="height: 200px">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
</div>
<pre><div class="d-flex align-content-start flex-wrap">...</div></pre>
<div class="border-example">
<div class="d-flex align-content-end flex-wrap border-highlight mb-3" style="height: 200px">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
</div>
<pre><div class="d-flex align-content-end flex-wrap">...</div></pre>
<div class="border-example">
<div class="d-flex align-content-center flex-wrap border-highlight mb-3" style="height: 200px">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
</div>
<pre><div class="d-flex align-content-center flex-wrap">...</div></pre>
<div class="border-example">
<div class="d-flex align-content-between flex-wrap border-highlight mb-3" style="height: 200px">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
</div>
<pre><div class="d-flex align-content-between flex-wrap">...</div></pre>
<div class="border-example">
<div class="d-flex align-content-around flex-wrap border-highlight mb-3" style="height: 200px">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
</div>
<pre><div class="d-flex align-content-around flex-wrap">...</div></pre>
<div class="border-example">
<div class="d-flex align-content-stretch flex-wrap border-highlight mb-3" style="height: 200px">
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
<div class="p-2 border-highlight">Flex item</div>
</div>
</div>
<pre><div class="d-flex align-content-stretch flex-wrap">...</div></pre>
<p><code>align-content</code> 也存在响应变化。</p>
<ul>
<li><code>.align-content-start</code></li>
<li><code>.align-content-end</code></li>
<li><code>.align-content-center</code></li>
<li><code>.align-content-around</code></li>
<li><code>.align-content-stretch</code></li>
<li><code>.align-content-sm-start</code></li>
<li><code>.align-content-sm-end</code></li>
<li><code>.align-content-sm-center</code></li>
<li><code>.align-content-sm-around</code></li>
<li><code>.align-content-sm-stretch</code></li>
<li><code>.align-content-md-start</code></li>
<li><code>.align-content-md-end</code></li>
<li><code>.align-content-md-center</code></li>
<li><code>.align-content-md-around</code></li>
<li><code>.align-content-md-stretch</code></li>
<li><code>.align-content-lg-start</code></li>
<li><code>.align-content-lg-end</code></li>
<li><code>.align-content-lg-center</code></li>
<li><code>.align-content-lg-around</code></li>
<li><code>.align-content-lg-stretch</code></li>
<li><code>.align-content-xl-start</code></li>
<li><code>.align-content-xl-end</code></li>
<li><code>.align-content-xl-center</code></li>
<li><code>.align-content-xl-around</code></li>
<li><code>.align-content-xl-stretch</code></li>
</ul>
</div>
</div>
</div>
</div>
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