案例:Bootstrap案例     状态:可编辑再运行    进入横版
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<!DOCTYPE html>
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<html>
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<head>
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    <meta charset="utf-8">
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    <title>Bootstrap 实例 - 响应式的导航栏</title>
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    <link rel="stylesheet" href="/css/bootstrap/bootstrap3.3.7.min.css">
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    <script src="/js/bootstrap/jquery.min.js"></script>
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    <script src="/js/bootstrap/bootstrap3.3.7.min.js"></script>
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</head>
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<body>
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<nav class="navbar navbar-default" role="navigation">
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    <div class="container-fluid"> 
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    <div class="navbar-header">
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        <button type="button" class="navbar-toggle" data-toggle="collapse"
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                data-target="#example-navbar-collapse">
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            <span class="sr-only">切换导航</span>
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            <span class="icon-bar"></span>
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            <span class="icon-bar"></span>
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            <span class="icon-bar"></span>
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        </button>
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        <a class="navbar-brand" href="#">W3xue教程</a>
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    </div>
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    <div class="collapse navbar-collapse" id="example-navbar-collapse">

 运行结果 
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