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我加載了bootstrap css和js文件並添加了以下html代碼。 這兩個都成功加載 - 頭標籤中的CSS和頁腳下的JS。其他功能也正常工作。bootstrap導航欄移動切換不起作用
<nav class="navbar navbar-inverse navbar-fixed-top" role="navigation">
<div class="container container-header">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1-collapse">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="{{ url_for('public.home') }}">
NekTime
</a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse navbar-ex1-collapse">
<ul class="nav navbar-nav">
<li><a href="{{ url_for('public.home') }}">Home</a></li>
<li><a href="{{ url_for('public.about') }}">About</a></li>
</ul>
{% if current_user and current_user.is_authenticated() %}
<ul class="nav navbar-nav navbar-right">
<li>
<p class="navbar-text"><a class="navbar-link" href="{{ url_for('user.members') }}">Logged in as {{ current_user.username }}</a></p>
</li>
<li><a class="navbar-link" href="{{ url_for('public.logout') }}"><i class="fa fa-sign-out"></i></a></li>
</ul>
{% elif form %}
<ul class="nav navbar-nav navbar-right">
<li><a href="{{ url_for('public.register') }}">Create account</a></li>
</ul>
<form id="loginForm" method="POST" class="navbar-form form-inline navbar-right" action="/" role="login">
{{ form.hidden_tag() }}
<div class="form-group">
{{ form.username(placeholder="Username", class_="form-control") }}
{{ form.password(placeholder="Password", class_="form-control") }}
</div>
<button type="submit" class="btn btn-default">Log in</button>
</form>
{% endif %}
</div><!-- /.navbar-collapse -->
</div><!-- /.container -->
</nav>
當我收縮瀏覽器時,切換按鈕替換其他菜單,但我無法展開該切換按鈕。 我設法得到正確的數據目標..我不知道下一步該怎麼做