Bootstrap v4導航欄錯誤？

這是問題所在。我從bootstrap端採用了默認的導航欄示例（https://v4-alpha.getbootstrap.com/components/navbar/）。他們在結果中顯示全尺寸的導航欄，當屏幕變小時可以摺疊。但是當我插入的代碼到我的項目，它顯示了這一點：Bootstrap v4導航欄錯誤？

https://ibb.co/fjBNhQ

正如你可以看到它總是崩潰。我嘗試了很多其他的例子，但沒有任何工作。下面是代碼：

<!DOCTYPE html> 
 
<html> 
 

 
<head> 
 
    <title>Test area</title> 
 
    <link rel="stylesheet" href="media/css/bootstrap.min.css"> 
 
</head> 
 

 
<body> 
 
    <div class="header"> 
 
    <div class="top-header"> 
 
     <div class="container"> 
 
     <nav class="navbar navbar-toggleable-md navbar-light bg-faded"> 
 
      <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation"> 
 
           <span class="navbar-toggler-icon"></span> 
 
          </button> 
 
      <a class="navbar-brand" href="#">Navbar</a> 
 
      <div class="collapse navbar-collapse" id="navbarNavAltMarkup"> 
 
      <div class="navbar-nav"> 
 
       <a class="nav-item nav-link active" href="#">Home <span class="sr-only">(current)</span></a> 
 
       <a class="nav-item nav-link" href="#">Features</a> 
 
       <a class="nav-item nav-link" href="#">Pricing</a> 
 
       <a class="nav-item nav-link disabled" href="#">Disabled</a> 
 
      </div> 
 
      </div> 
 
     </nav> 
 
     </div> 
 
    </div> 
 
    </div> 
 
    <script src="media/js/jquery.min.js"></script> 
 
    <script src="media/js/popper.min.js"></script> 
 
    <script src="media/js/bootstrap.min.js"></script> 
 
</body> 
 

 
</html>

來源

2017-08-27 AndrewGG

請嘗試使用他們的入門模板。 –

@Emran是bootstrap 3.我需要更新：v4。 – AndrewGG

您分享的代碼片段很好。您確定您使用href屬性指定了正確的目的地。 – ern

你貼只能在引導阿爾法6，不是beta工作的代碼。這是因爲從Bootstrap 4測試版開始，navbar-toggleable*類已更改爲navbar-expand*。

引導4.0.0：https://www.codeply.com/go/0c0FC1Lrn2

<nav class="navbar navbar-expand-lg navbar-light bg-faded"> 
      <a class="navbar-brand" href="#">Navbar</a> 
      <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation"> 
       <span class="navbar-toggler-icon"></span> 
      </button> 
      <div class="collapse navbar-collapse" id="navbarNavAltMarkup"> 
      <div class="navbar-nav"> 
       <a class="nav-item nav-link active" href="#">Home <span class="sr-only">(current)</span></a> 
       <a class="nav-item nav-link" href="#">Features</a> 
       <a class="nav-item nav-link" href="#">Pricing</a> 
       <a class="nav-item nav-link disabled" href="#">Disabled</a> 
      </div> 
      </div> 
    </nav>

另見：Bootstrap 4 navbar layout works using CDN, breaks using downloaded code

來源

2017-08-27 16:49:52 ZimSystem

那麼，只有阿爾法文檔？ Okey ... – AndrewGG

http://getbootstrap.com/ – ZimSystem

那麼，錯過了。謝謝：） – AndrewGG

你需要把所需的meta標籤添加描述here：

<meta charset="utf-8"> 
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

，並使用正確的CSS類描述here

<nav class="navbar navbar-expand-lg navbar-light bg-light">

的導航欄會倒塌的LG斷點

<!DOCTYPE html> 
 
<html> 
 

 
<head> 
 
    <!-- Required meta tags --> 
 
    <meta charset="utf-8"> 
 
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> 
 
    <title>Test area</title> 
 
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous"> 
 
</head> 
 

 
<body> 
 
    <div class="header"> 
 
    <div class="top-header"> 
 
     <div class="container"> 
 
     <nav class="navbar navbar-expand-lg navbar-light bg-faded"> 
 
      <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation"> 
 
           <span class="navbar-toggler-icon"></span> 
 
          </button> 
 
      <a class="navbar-brand" href="#">Navbar</a> 
 
      <div class="collapse navbar-collapse" id="navbarNavAltMarkup"> 
 
      <div class="navbar-nav"> 
 
       <a class="nav-item nav-link active" href="#">Home <span class="sr-only">(current)</span></a> 
 
       <a class="nav-item nav-link" href="#">Features</a> 
 
       <a class="nav-item nav-link" href="#">Pricing</a> 
 
       <a class="nav-item nav-link disabled" href="#">Disabled</a> 
 
      </div> 
 
      </div> 
 
     </nav> 
 
     </div> 
 
    </div> 
 
    </div> 
 
    <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> 
 
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/js/bootstrap.min.js" integrity="sha384-h0AbiXch4ZDo7tp9hKZ4TsHbi047NrKGLO3SEJAg45jXxnGIfYzk4Si90RDIqNm1" crossorigin="anonymous"></script> 
 
</body> 
 

 
</html>

來源

2017-08-27 16:44:32

對於任何人立刻找代碼工作與當前最新的引導。

npm install [email protected]

記住要重新加載以驗證更改！

來源

2018-01-11 00:20:47 bmjrowe

Bootstrap v4導航欄錯誤？

回答

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