Bootstrap 4 - 切换按钮不起作用 [英] Bootstrap 4 - Toggle button not working

问题描述

我试图将 navbar 添加到我的网站，但是当我添加它时，切换按钮不起作用。

这是我的 navbar 代码：

 < nav class =navbar navbar-expand-lg navbar-light bg-light> 
< a class =navbar-brandhref =＃> Navbar< / a> 
 < span class =navbar-toggler-icon>< / span> 
< / button> 
 
< div class =collapse navbar-collapseid =navbarSupportedContent> 
< ul class =navbar-nav mr-auto> 
< li class =nav-item active> 
< a class =nav-linkhref =＃>主页< span class =sr-only>（current）< / span>< / a> 
< / li> 
< li class =nav-item> 
< a class =nav-linkhref =＃>连结< / a> 
< / li> 
< li class =nav-item> 
< a class =nav-link disabledhref =＃>已禁用< / a> 
< / li> 
< / ul> 
< form class =form-inline my-2 my-lg-0> 
< input class =form-control mr-sm-2type =textplaceholder =Searcharia-label =Search> 
< button class =btn btn-outline-success my-2 my-sm-0type =submit>搜索< / button> 
< / form> 
< / div> 
< / nav> 
  

以下是我包含的内容：

 < link rel =stylesheethref =https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.cssintegrity = sha384- / Y6pD6FV / Vv2HJnA6t + vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6Mcrossorigin =anonymous> 
< script src =https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.jsintegrity =sha384-h0AbiXch4ZDo7tp9hKZ4TsHbi047NrKGLO3SEJAg45jXxnGIfYzk4Si90RDIqNm1crossorigin =anonymous> < /脚本> 
< script src =https://code.jquery.com/jquery-3.2.1.slim.min.jsintegrity =sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr / rE9 / Qpg6aAZGJwFDMVNA / GpGFF93hXpG5KkNcrossorigin =anonymous >< /脚本> 
< script src =https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.11.0/umd/popper.min.jsintegrity =sha384-b / U6ypiBEHpOf / 4 + 1nzFpr53nxSS + GLCkfwBdFNTxtclqqenISfwAzpKaMNFNmj4crossorigin =anonymous>< / script> 
  

感谢您的帮助！

解决方案

您需要输入： -

 < script src =https：// code。 jquery.com/jquery-3.2.1.slim.min.jsintegrity =sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr / rE9 / Qpg6aAZGJwFDMVNA / GpGFF93hXpG5KkNcrossorigin =anonymous>< / script> 
  

在所有其他 js 文件之前。

然后它就可以工作了。

工作示例： - https://jsfiddle.net/mmqhw26j/

$ b

注意： - 注意总是需要首先添加jQuery核心库/基础库，然后才需要添加任何其他jQuery文件/库

I'm trying to add navbar to my website, but when I add it toggle button doesn't work.

Here is my navbar code:

<nav class="navbar navbar-expand-lg navbar-light bg-light">
  <a class="navbar-brand" href="#">Navbar</a>
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>

  <div class="collapse navbar-collapse" id="navbarSupportedContent">
    <ul class="navbar-nav mr-auto">
      <li class="nav-item active">
        <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Link</a>
      </li>
      <li class="nav-item">
        <a class="nav-link disabled" href="#">Disabled</a>
      </li>
    </ul>
    <form class="form-inline my-2 my-lg-0">
      <input class="form-control mr-sm-2" type="text" placeholder="Search" aria-label="Search">
      <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
    </form>
  </div>
</nav> 

Here is what I've included:

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.js" integrity="sha384-h0AbiXch4ZDo7tp9hKZ4TsHbi047NrKGLO3SEJAg45jXxnGIfYzk4Si90RDIqNm1" crossorigin="anonymous"></script>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.11.0/umd/popper.min.js" integrity="sha384-b/U6ypiBEHpOf/4+1nzFpr53nxSS+GLCkfwBdFNTxtclqqenISfwAzpKaMNFNmj4" crossorigin="anonymous"></script>

Thanks for help!

解决方案

You need to put:-

<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>

Before all the other js files.

Then it will work.

Working example:- https://jsfiddle.net/mmqhw26j/

Note:- Take care that always jQuery core-library/base-library need to be added first and then only any other jQuery file/library need to add

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