Bootstrap dropdown not working

2019-01-21 18:09发布

站内文章 / 前端开发
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问题:

I can't make bootstrap dropdown to work. Here is my html for nav:

<ul class='nav'>
  <li class='active'>Home</li>
  <li class='dropdown'>
    <a class="dropdown-toggle" data-toggle="dropdown" href='#'>Personal asset loans</a>
    <ul class="dropdown-menu" role="menu">
      <li><a href="#">asds</a></li>
      <li class="divider"></li>
    </ul>
  </li>
  <li>Payday loans</li>
  <li>About</li>
  <li>Contact</li>
</ul>

And here are the scripts:

<script type="text/javascript" src="js/bootstrap/bootstrap-dropdown.js"></script>
<script>
     $(document).ready(function(){
        $('.dropdown-toggle').dropdown()
    });
</script>

What am I doing wrong? Thanks for your answers!

回答1:

Working demo: http://codebins.com/bin/4ldqp73

try this 

<ul class='nav'>
  <li class='active'>Home</li>
  <li>
    <div class="dropdown">
      <a class="dropdown-toggle" data-toggle="dropdown" href="#">Personal asset loans</a>
      <ul class="dropdown-menu" role="menu" aria-labelledby="dLabel">            
        <li><a href="#">asds</a></li>
        <li class="divider"></li>
      </ul>
    </div>   
    </li>
    <li>Payday loans</li>
  <li>About</li>
  <li>Contact</li>
</ul>


回答2:

I had the same problem. After a couple of hours of trouble shooting found that,

I had 

<script type="text/javascript" src="Scripts/bootstrap.min.js"></script>
<script type="text/javascript" src="Scripts/jquery-2.1.1.min.js"></script>

instead of,

<script type="text/javascript" src="Scripts/jquery-2.1.1.min.js"></script>
<script type="text/javascript" src="Scripts/bootstrap.min.js"></script>

Hope this helps someone



回答3:

I had the same problem when I included the bootstrap.min.js twice. Removed one of them and it began working.



回答4:

FYI: If you have bootstrap.js, you should not add bootstrap-dropdown.js.

I'm unsure of the result with bootstrap.min.js.



回答5:

For your style you need to include the css files of bootstrap, generally just before </head> element

<link href="css/bootstrap.css" rel="stylesheet">

Next you'll need to include the js files, it's recommended to include them at the end of the document, generally before the </body> so pages load faster.

<script src="js/jquery.js"></script>        
<script src="js/bootstrap.js"></script>


回答6:

Add following lines within the body tags.

<!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
  <script src="https://code.jquery.com/jquery.js"></script>
  <!-- Include all compiled plugins (below), or include individual files 
        as needed -->
  <script src="js/bootstrap.min.js"></script>


回答7:

Have you included jquery.js ?

Also, compare this line of code with yours:

<a class="dropdown-toggle" data-toggle="dropdown" href="#">Personal asset loans<b class="caret"></b></a>

See this version that works ok.

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>Bootstrap dropdown</title>
    <link href="css/bootstrap.css" rel="stylesheet" type="text/css" />

</head>
<body>
    <div class="navbar">
        <div class="navbar-inner">
            <div class="container">
                <ul class="nav">
                    <a class="brand" href="#">w3resource</a>
                    <li class="active"><a href="#">Home</a></li>
                    <li><a href="#">Blog</a></li>
                    <li><a href="#">About</a></li>
                    <li><a href="#">Contact</a></li>
                    <li class="dropdown" id="accountmenu">
                        <a class="dropdown-toggle" data-toggle="dropdown" href="#">Tutorials<b class="caret"></b></a>
                        <ul class="dropdown-menu">
                            <li><a href="#">PHP</a></li>
                            <li><a href="#">MySQL</a></li>
                            <li class="divider"></li>
                            <li><a href="#">JavaScript</a></li>
                            <li><a href="#">HTML5</a></li>
                        </ul>
                    </li>
                </ul>
            </div>
        </div>
    </div>
    <div class="container-fluid">
     <h1>Dropdown Example</h1>
    </div>
    <script type="text/javascript" src="js/jquery-latest.js"></script>
    <script type="text/javascript" src="js/bootstrap.js"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            $('.dropdown-toggle').dropdown();
        });
   </script>
</body>
</html>


回答8:

you have to import this files into the <head></head> of your html.

<script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
<script src="http://code.jquery.com/jquery-migrate-1.2.1.min.js"></script>
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>


回答9:

Both bootstrap and jquery must be included:

<link type="text/css" href="/{ProjectName}/css/ui-lightness/jquery-ui-1.8.18.custom.css" rel="stylesheet" />
<script type="text/javascript" src="/{ProjectName}/js/jquery-x.x.x.custom.min.js"></script>

<link type="text/css" href="/{ProjectName}/css/bootstrap.css" rel="stylesheet" />
<script type="text/javascript" src="/{ProjectName}/js/bootstrap.js"></script>

NOTE: jquery-x.x.x.min.js version must be version 2.x.x !!!



回答10:

Try this in the head section

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script src="//netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
<link rel="stylesheet" type="text/css" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">


回答11:

Here what i did is .....

Just removed bootstrap.min.js from my Project and added bootstrap.js to it and it started working........

bundles.Add(new ScriptBundle("~/bundles/bootstrap").Include(
                  "~/Scripts/bootstrap.js"
                  //"~/Scripts/bootstrap.min.js"));


回答12:

I figured it out and the simplest way to do this ist just copy and past the CDN of bootstrap link that can be found in https://www.bootstrapcdn.com/ and the Jquery CDN Scripts that can be found here https://code.jquery.com/ and after you copy the links, the bootstrap links paste on the head of HTML and the Jquery Script paste in body of HTML like the example below: 

    <!DOCTYPE html>
    <html>
      <head>

        <title>Purrfect Match Landing Page</title>
        <!-- Latest compiled and minified CSS -->
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
        <!--<link rel="stylesheet" href="griddemo.css">

        <!-- Optional theme -->
        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap-theme.min.css">
        <link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">

      </head>

      <body>

        <!-- Latest compiled and minified JavaScript -->
        <script src="https://code.jquery.com/jquery-3.1.1.js"></script>
        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js">      </script>    
      </body>
    </html>

For me works perfect hope it works also for you :)



回答13:

You'll have to check conflicting css files/properties for example you could have ".nav" custom style contents elsewhere try to disable your own css files and check if that works then check which file or custom style that makes the conflicts also make sure you are including the bootstrap.min.js in your code



回答14:

I had the same issue which brought me here.

My Issue : I was using the recommended jquery 1.12.0 version as my jquery script file.

Solution : replaced the jquery script with jquery 2.2.0 version.

That solved it for me.



回答15:

For me, it was a CORS issue. I removed crossorigin="anonymous" from my script importing tags, and it started working again.

BTW the latest script tags, in the correct order, can always be found here: https://getbootstrap.com/

Edit: Apparently adding defer to the script tag will also break all the Bootstrap goodies.



标签： html drop-down-menu twitter-bootstrap
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