- var language = current.path[1] || 'ts' - if (language !== 'ts' || language !== 'js' || language !== 'dart') { language = 'ts'; } md-toolbar(class="main-nav background-regal l-pinned-top l-layer-5",scroll-y-offset-element) nav h1 Angular by Google button(class="main-nav-button main-nav-mobile-trigger l-right" aria-label="查看菜单" ng-click="appCtrl.toggleMainMenu($event)" md-button) 网站菜单 ul(ng-class="appCtrl.showMainNav ? 'is-visible' : ''") li.l-left 特性 li.l-left 文档 li.l-left 事件 li.l-left 新闻 li.l-right 立即开始!