html - Bootstrap Navbar 和 Carousel 没有响应

Question

我一直在尝试让我的导航栏品牌 Logo 和轮播都具有响应性，但似乎没有任何效果。如果我减小屏幕尺寸，品牌形象就会溢出导航栏，而轮播看起来又长又笨拙。我的代码如下。

轮播 HTML

    <div class="row">
<div class="col-sm-12 col-md-12 col-lg-12">
<div class = "carousel">
<div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
  <ol class="carousel-indicators">
    <li data-target="#carouselExampleIndicators" data-slide-to="0" class="active"></li>
    <li data-target="#carouselExampleIndicators" data-slide-to="1"></li>
     </ol>
  <div class="carousel-inner">
    <div class="carousel-item active">
      <img src="#" class="d-block w-100" alt="...">
    <div class="carousel-caption d-none d-md-block">
      <h3></h3>
    </div>
    </div>
    <div class="carousel-item">
      <img src="#" class="d-block w-100" alt="...">
     <div class="carousel-caption d-none d-md-block">
    <h3></h3>
  </div>
    </div>

导航栏 HTML

<nav class="navbar navbar-custom navbar-expand-lg fixed-top">
<a class="navbar-brand" href="#">
    <img class="img-responsive" src="" width="30" height="50" alt="">
  </a>
...
</nav>

Answer 1

我通过添加图像测试了您的代码，看起来一切都配置正确。但是，您可能想看看您是如何配置 CSS 的。

尝试添加(最新的缩小 CSS):

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.3/css/bootstrap.min.css" />

此外，您可能混合使用了不同的 bootstrap 4 和 3 元素(我看到您使用了 img-responsive 作为 Logo - Bootstrap 4 中不再使用它，现在是 img-流体)。如果是这样，试试这个导航栏:

<nav class="navbar navbar-expand-lg navbar-light bg-light">
  <a class="navbar-brand" href="#"><img src="https://via.placeholder.com/50" class="d-block w-100" alt="..."></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="#" tabindex="-1" aria-disabled="true">Disabled</a>
      </li>
    </ul>
  </div>
</nav>

代码笔:https://codepen.io/brooksrelyt/pen/drPpeW