Bootstrap 4切換導航欄

我想從Bootstrap 3.x遷移到4，我遇到了新的導航欄的問題。無論我選擇哪種navbar-toggleable-x選項，navbar總是顯示漢堡包按鈕，就像它摺疊一樣。Bootstrap 4切換導航欄

此HTML文檔演示了我的問題。我在官方文檔頁面上找到了它。

<html> 
<head> 
<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> 
</head> 
<body> 
<nav class="navbar navbar-toggleable-md navbar-light bg-faded"> 
    <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" 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="navbarNavDropdown"> 
    <ul class="navbar-nav"> 
     <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="#">Features</a> 
     </li> 
     <li class="nav-item"> 
     <a class="nav-link" href="#">Pricing</a> 
     </li> 
     <li class="nav-item dropdown"> 
     <a class="nav-link dropdown-toggle" href="http://example.com" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"> 
      Dropdown link 
     </a> 
     <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink"> 
      <a class="dropdown-item" href="#">Action</a> 
      <a class="dropdown-item" href="#">Another action</a> 
      <a class="dropdown-item" href="#">Something else here</a> 
     </div> 
     </li> 
    </ul> 
    </div> 
</nav> 
</body> 
</html>

來源

2017-08-14 wajsic

探出你的''

自舉4 的β的，toggleable已被替換expand。

現在，它的「擴大」斷點，而不是「切換」斷點邏輯的變化相應地使navbar-toggleable-md現在早就navbar-expand-lg ..

https://www.codeply.com/go/Io0duaPkqz

<nav class="navbar navbar-expand-lg navbar-light bg-faded"> 
    <button class="navbar-toggler navbar-toggler-right" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" 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="navbarNavDropdown"> 
    <ul class="navbar-nav"> 
     <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="#">Features</a> 
     </li> 
     <li class="nav-item"> 
     <a class="nav-link" href="#">Pricing</a> 
     </li> 
     <li class="nav-item dropdown"> 
     <a class="nav-link dropdown-toggle" href="http://example.com" id="navbarDropdownMenuLink" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"> 
      Dropdown link 
     </a> 
     <div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink"> 
      <a class="dropdown-item" href="#">Action</a> 
      <a class="dropdown-item" href="#">Another action</a> 
      <a class="dropdown-item" href="#">Something else here</a> 
     </div> 
     </li> 
    </ul> 
    </div> 
</nav>

https://www.codeply.com/go/Io0duaPkqz

如果您想讓導航欄水平展開，則需要navbar-expand*類，否則導航欄默認爲移動垂直摺疊版。

上引導4

更多changes from alpha 6 to beta

來源

2017-08-14 14:03:14 ZimSystem

似乎現在工作。謝謝。 – wajsic

Bootstrap 4切換導航欄

回答

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