没有容器流体类的 Bootstrap 4 容器全屏宽度

Question

我想使用媒体查询为容器提供 100% 的宽度，让元素包含在较大的屏幕中而不包含在小屏幕中，反之亦然。此代码只是一个示例，它适用于 Bootstrap v4 alpha 6，但在上一个版本中它不再适用。

有人知道解决办法吗？

JSFiddle

@media screen and (max-width: 1000px) {
  container {
    width: 100%;
  }
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0/js/bootstrap.bundle.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" />
<div class="container">
  <nav class="navbar navbar-light bg-dark">
    <a class="navbar-brand" href="#">Navbar</a>
  </nav>
</div>

Answer 1

试试下面的代码。当页面宽度小于500px 时，它使navbar 适合页面宽度，否则它对您的元素具有container 类的正常效果。如果您想更改页面大小并对其进行测试，您可以使用 jsFiddel demo。

@media screen and (max-width: 1000px) {
  .container {
      padding-right:0 !important;
      padding-left:0 !important;
      max-width: initial !important;
  }
}
body{
  background:#a7b7bf !important;
}

<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" />

<div class="container">
  <nav class="navbar navbar-light bg-dark">
    <a class="navbar-brand" href="#">Navbar</a>
  </nav>
</div>

如果您希望始终将 navbar 填满整个页面宽度，您可以轻松地从包装 div 中删除 container 类：

body{
  background:#a7b7bf !important;
}

<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" />

<div>
  <nav class="navbar navbar-light bg-dark">
    <a class="navbar-brand" href="#">Navbar</a>
  </nav>
</div>

Answer 2

以下是您在不使用 container-fluid 类的情况下正确执行此操作的方法，而是将所有内容放入 container 中（单击“运行代码 sn-p”按钮并展开到全屏以查看它确实是全宽的） ：

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">

<nav class="navbar navbar-expand-lg navbar-light bg-light">
   <div class="container">
       <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 dropdown">
                   <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                       Dropdown
                   </a>
                   <div class="dropdown-menu" aria-labelledby="navbarDropdown">
                       <a class="dropdown-item" href="#">Action</a>
                       <a class="dropdown-item" href="#">Another action</a>
                       <div class="dropdown-divider"></div>
                       <a class="dropdown-item" href="#">Something else here</a>
                   </div>
               </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="search" placeholder="Search" aria-label="Search">
               <button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
           </form>
       </div>
   </div>
</nav>


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