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下拉菜单bootsrap 3将无法正常工作

[英]drop down menu bootsrap 3 wont work

我想创建一个带有下拉菜单的导航栏。 我已经在其他一些网站上做到了,而且效果一直很好。

现在突然停止工作了,我想知道为什么。

这是代码:

<head>
    <title>TODO supply a title</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- Latest compiled and minified CSS -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">

    <!-- Optional theme -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css" integrity="sha384-fLW2N01lMqjakBkx3l/M9EahuwpSfeNvV63J5ezn3uZzapT0u7EYsXMjQV+0En5r" crossorigin="anonymous">
</head>


<body>
    <nav class="navbar navbar-inverse navbar-fixed-top" id="my-navbar">
        <div class="container">
            <div class="navbar-header">
                <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#navbar-collapse">
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                    <span class="icon-bar"></span>
                </button>

                <a href="" class="navbar-brand">Marco Koopman</a>

            </div>
            <div class="collapse navbar-collapse" id="navbar-collapse">
                <ul class="nav navbar-nav">
                    <li><a href="">About me</a></li>
                    <li><a href="">My school</a></li>
                    <li><a href="">My skills</a></li>
                    <li><a href="">More info</a></li>
                </ul>
            </div>
        </div>
    </nav>


     <!-- Latest compiled and minified JavaScript -->
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script>
    <script src="https://code.jquery.com/jquery-2.2.4.min.js"/>

</body>

jQuery必须排在第一位,并且正确关闭script标记,因为第二个script标记未正确关闭。

 <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/> <head> <title>TODO supply a title</title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> </head> <body> <nav class="navbar navbar-inverse navbar-fixed-top" id="my-navbar"> <div class="container"> <div class="navbar-header"> <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#navbar-collapse"> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <a href="" class="navbar-brand">Marco Koopman</a> </div> <div class="collapse navbar-collapse" id="navbar-collapse"> <ul class="nav navbar-nav"> <li><a href="">About me</a></li> <li><a href="">My school</a></li> <li><a href="">My skills</a></li> <li><a href="">More info</a></li> </ul> </div> </div> </nav> <script src="https://code.jquery.com/jquery-2.2.4.min.js"></script> <!-- Latest compiled and minified JavaScript --> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script> </body> 

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