menu toogle button not working in bootstrap 4

Question

bootstrap 4當標題變得響應時，麪包屑按鈕不能正常工作。

我已經包括了Bootstrap 4CSS和引導4 js

請幫我解決這個問題

代碼：

.navbar { 
 
    height:100px; 
 
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css"> 
 
<nav class="navbar navbar-expand-md navbar-light bg-light fixed-top"> 
 
    <div class="container nopadding"> 
 
     <a class="navbar-brand" href="#"> 
 
      logo 
 
     </a> 
 
     <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault" aria-controls="navbarsExampleDefault" 
 
     aria-expanded="false" aria-label="Toggle navigation"> 
 
     <span class="navbar-toggler-icon"></span> 
 
     </button> 
 

 
     <div class="collapse navbar-collapse" id="navbarsExampleDefault"> 
 
     <ul class="navbar-nav ml-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>SERVICES</a> 
 
      </li> 
 
      <li class="nav-item"> 
 
      <a>SUPPORT</a> 
 
      </li> 
 
      <li class="nav-item"> 
 
      <a>TECHNOLOGY</a> 
 
      </li> 
 
     </ul> 
 
     </div> 
 
    </div> 
 
</nav> 
 
    
 
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/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://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.js"></script>

圖片：

Answer 1

檢查您在控制檯錯誤引導JS

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous"> 
<nav class="navbar navbar-expand-md navbar-light bg-light fixed-top"> 
    <div class="container nopadding"> 
     <a class="navbar-brand" href="#"> 
      logo 
     </a> 
     <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault" aria-controls="navbarsExampleDefault" 
      aria-expanded="false" aria-label="Toggle navigation"> 
    <span class="navbar-toggler-icon"></span> 
    </button> 

     <div class="collapse navbar-collapse" id="navbarsExampleDefault"> 
      <ul class="navbar-nav ml-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>SERVICES</a> 
       </li> 
       <li class="nav-item"> 
        <a>SUPPORT</a> 
       </li> 
       <li class="nav-item"> 
        <a>TECHNOLOGY</a> 
       </li> 

      </ul> 

     </div> 

    </div> 

</nav> 

<script src="https://code.jquery.com/jquery-3.2.1.min.js" integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4=" crossorigin="anonymous"></script> 
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.js" integrity="sha384-h0AbiXch4ZDo7tp9hKZ4TsHbi047NrKGLO3SEJAg45jXxnGIfYzk4Si90RDIqNm1" crossorigin="anonymous"></script>