Bootstrap导航栏教程不适用于任何浏览器

时间：2017-10-13 18:56:47

标签： css bootstrap-4

任何人都可以告诉我为什么这个导航栏不起作用。我尝试了所有的东西，但它一直都在崩溃

     

<nav class="navbar navbar-default navbar-fixed-top">
    <div class="container">
        <div class="navbar-header">
            <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
        <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="#">Project name</a>
        </div>
        <div id="navbar" class="navbar-collapse collapse">
            <ul class="nav navbar-nav">
                <li class="active"><a href="#">Home</a></li>
                <li><a href="#about">About</a></li>
                <li><a href="#contact">Contact</a></li>

            </ul>
            <ul class="nav navbar-nav navbar-right">
                <li><a href="../navbar/">Default</a></li>
                <li><a href="../navbar-static-top/">Static top</a></li>
                <li class="active"><a href="./">Fixed top <span class="sr-only">(current)</span></a></li>
            </ul>
        </div>
        <!--/.nav-collapse -->
    </div>
</nav>

2 个答案:

答案 0 :(得分：1)

您目前正在使用Bootstrap 3导航栏，但需要启动Bootstrap 4 CSS。

用这个

替换你的Bootstrap CSS文件 
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">

如果您想使用导航栏，您还需要javascript文件和jquery 

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>

这是完整的HTML 

<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
</head>

<body>

    <nav class="navbar navbar-default navbar-fixed-top">
        <div class="container">
            <div class="navbar-header">
                <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
            <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="#">Project name</a>
            </div>
            <div id="navbar" class="navbar-collapse collapse">
                <ul class="nav navbar-nav">
                    <li class="active"><a href="#">Home</a></li>
                    <li><a href="#about">About</a></li>
                    <li><a href="#contact">Contact</a></li>

                </ul>
                <ul class="nav navbar-nav navbar-right">
                    <li><a href="../navbar/">Default</a></li>
                    <li><a href="../navbar-static-top/">Static top</a></li>
                    <li class="active"><a href="./">Fixed top <span class="sr-only">(current)</span></a></li>
                </ul>
            </div>
            <!--/.nav-collapse -->
        </div>
    </nav>

    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js" integrity="sha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txa" crossorigin="anonymous"></script>
</body>
</html>

答案 1 :(得分：1)

如果加载所需的每个库，

你的HTML结构似乎没问题。

你需要

＆＃13;
＆＃13; 
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.11.0/umd/popper.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-beta/js/bootstrap.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-beta/css/bootstrap.min.css" rel="stylesheet" />
<nav class="navbar navbar-default navbar-fixed-top">
  <div class="container">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
        <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="#">Project name</a>
    </div>
    <div id="navbar" class="navbar-collapse collapse">
      <ul class="nav navbar-nav">
        <li class="active"><a href="#">Home</a></li>
        <li><a href="#about">About</a></li>
        <li><a href="#contact">Contact</a></li>

      </ul>
      <ul class="nav navbar-nav navbar-right">
        <li><a href="../navbar/">Default</a></li>
        <li><a href="../navbar-static-top/">Static top</a></li>
        <li class="active"><a href="./">Fixed top <span class="sr-only">(current)</span></a></li>
      </ul>
    </div>
    <!--/.nav-collapse -->
  </div>
</nav>
＆＃13;
＆＃13;
＆＃13;

您的代码似乎也需要https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.11.0/umd/popper.min.js（它用于在用户点击元素时显示的弹出框）您的菜单无需使用

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