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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                你經常想要一個帶有活動導航項的導航欄。這相當容易實現。因為在?block?外 的聲明在子模板中是全局的,并且在布局模板求值前執行,在子模板中定義活動的 菜單項: ~~~ {% extends "layout.html" %} {% set active_page = "index" %} ~~~ 布局模板之后就可以訪問?active_page?。此外,這意味著你可以為它定義默認 值: ~~~ {% set navigation_bar = [ ('/', 'index', 'Index'), ('/downloads/', 'downloads', 'Downloads'), ('/about/', 'about', 'About') ] -%} {% set active_page = active_page|default('index') -%} ... <ul id="navigation"> {% for href, id, caption in navigation_bar %} <li{% if id == active_page %} class="active"{% endif %}><a href="{{ href|e }}">{{ caption|e }}</a>/li> {% endfor %} </ul> ... ~~~
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                              哎呀哎呀视频在线观看