Getting startedAccessibility（无障碍）Browsers and devices（浏览器和设备）Build tools（构建工具）Contents（内容）Download（下载）JavaScriptTheming Bootstrap（主题Bootstrap）WebpackComponents: AlertsAlerts（警报）Components: BadgesBadges（徽章）Components: BreadcrumbBreadcrumbComponents: Button groupButton group（按钮组）Components: ButtonsButtons（按钮）Components: CardsComponents: CarouselCards（卡）Carousel（圆盘传送带）Components: CollapseCollapse（折叠）Components: DropdownsDropdowns（下拉菜单）Components: FormsForms（表单）Components: Input groupInput group（输入群组）Components: Input groupJumbotron（广告大屏幕）Components: List groupList group（列表组）Components: ModalModal（互动视窗）Components: NavbarNavbar（导航栏）Components: NavsNavs（导航栏）Components: PaginationPagination（分页）Components: PopoversPopovers（弹出框）Components: ProgressProgress（进度条）Components: ScrollspyScrollspy（滚动监听）Components: TooltipsTooltips（提示工具）ContentCode（代码）Figures（图片区）Images（图片）Reboot（重置）Tables（表格）Typography（排版）LayoutGrid（网格）Layout（布局）Media object（多媒体对象）Utilities for layout（排版通用类别）MigrationMigrating to v4（迁移到v4）UtilitiesBorders（边框）Clearfix（清除浮动）Close icon（关闭图标）Colors（颜色）Display property（显示属性）Embeds（内嵌）Flex（弹性）Float（浮动）Image replacement（图像替换）Position（位置）Screenreaders（荧幕阅读器）Sizing（尺寸）Spacing（间隔）Text（文本）Vertical alignment（垂直对齐）Visibility（能见度）
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展示主角（hero）单位风格内容的轻量级灵活组件。
一个轻量级，灵活的组件，可以选择扩展整个视口，以展示您网站上的关键营销信息。
<div class="jumbotron"> <h1 class="display-3">Hello, world!</h1> <p class="lead">This is a simple hero unit, a simple jumbotron-style component for calling extra attention to featured content or information.</p> <hr class="my-4"> <p>It uses utility classes for typography and spacing to space content out within the larger container.</p> <p class="lead"> <a class="btn btn-primary btn-lg" href="#" role="button">Learn more</a> </p></div>
为了使 jumbotron 完整宽度，并且没有圆角，添加.jumbotron-fluid修饰符类并添加一个.container或.container-fluid之内。
<div class="jumbotron jumbotron-fluid"> <div class="container"> <h1 class="display-3">Fluid jumbotron</h1> <p class="lead">This is a modified jumbotron that occupies the entire horizontal space of its parent.</p> </div></div>