- var language = current.path[1] || 'ts'
- if (language !== 'ts' || language !== 'js' || language !== 'dart') { language = 'ts'; }

nav(data-swiftype-index="false" class="main-nav l-pinned-top l-layer-5", scroll-y-offset-element)
  h1 <a href="/" md-button>Angular <sup>by Google</sup></a>

  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 <span class="icon icon-arrow-drop-down"></span>

  ul(ng-class="appCtrl.showMainNav ? 'is-visible' : ''")
    li.l-left <a class="main-nav-button" href="/features.html" md-button>特性</a>
    li.l-left <a class="main-nav-button" href="/docs/#{language}/latest/" md-button>文档</a>
    li.l-left <a class="main-nav-button" href="/events.html" md-button>会议</a>
    li.l-left <a class="main-nav-button" href="/news.html" md-button>新闻</a>
    li.l-left
      a.main-nav-button(href="http://community.angular.cn/" target="_blank" md-button)
        | 社区
        img(src="data:image/svg+xml;base64,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")
    li.l-left <a class="main-nav-button" href="/translate/cn/home.html" md-button>关于中文版</a>
    li.l-right <a class="main-nav-button" href="/docs/ts/latest/quickstart.html" md-button>立即开始！</a>
    li.l-right
      a.main-nav-button.md-button.ng-cloak(ng-click="appCtrl.toggleSource($event)", href)
        span {{appCtrl.sourceVisible?'Hide English':'Show English'}}