css - 您知道为什么搜索图标没有以白色背景颜色显示并且下拉菜单没有右对齐吗？

Question

我想要一个包含页眉和页脚的布局，在页眉和页脚之间有一些带有帖子的列表项。我正在使用 Bootstrap ，我希望标题看起来像这样:

但它不起作用，显示如下:https://jsfiddle.net/83vnj5ru/1/ .

搜索图标没有白色背景，过滤器 1 和过滤器 2 下拉菜单没有像图像中那样在右侧对齐。你知道为什么吗？

HTML:

<div class="container py-5">
  <div class="row">
    <div class="col">
      <ul class="list-group forum">
        <li class="list-group-item bg-custom-light2 py-4">
          <div class="row">
            <form class="col-5">
              <div class="form-group">
                <div class="input-group">
                  <div class="input-group-prepend">
                    <span class="input-group-text"><i class="fa fa-search"></i></span>
                  </div>
                  <input type="email" class="form-control" id="exampleInputEmail1"
                         aria-describedby="emailHelp" placeholder="Search">
                </div>
              </div>
            </form>
          </div>
          <div class="col-7 text-right">
            <div class="dropdown">
              <a class="dropdown-toggle"  id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                Filter 1
              </a>
              <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
                <a class="dropdown-item" href="#">item1</a>
              </div>
            </div>
            <div class="dropdown">
              <a class="dropdown-toggle" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
              Filter 2
              </a>
              <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
                <a class="dropdown-item" href="#">item1</a>
              </div>
            </div>
          </div>
        </li>
        <li class="list-group-item">list item 1</li>
        <li class="list-group-item">list item 2</li>

        <li class="list-group-item bg-custom-light2 py-4">container footer</li>
      </ul>
    </div>
  </div>
</div>

CSS:

.bg-custom-light2{
  background-color: #fafafa;
}
.input-group-text, .input-group-prepend{
  background-color:none;
}
.input-group-text{
  color:gray;
}

Answer 1

看看对你有没有帮助

.bg-custom-light2{
  background-color: #fafafa;
}
.input-group-text, .input-group-prepend{
  background-color:none;
}
.input-group-text{
  color:gray;
}

.filters{
  width: auto;
  display: inline-block;
}

.search-icon{
  background-color: #ffffff !important;
  border: 1px solid #ced4da !important;
  border-right: 1px solid transparent !important;
}

.search-input{
  border-left: 1px solid transparent !important;  
}

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.5.0/css/all.css" integrity="sha384-B4dIYHKNBt8Bc12p+WXckhzcICo0wtJAoU8YZTY5qE0Id1GSseTk6S+L3BlXeVIU" crossorigin="anonymous">

<div class="container py-5">
  <div class="row">
    <div class="col">
      <ul class="list-group forum">
        <li class="list-group-item bg-custom-light2 py-4">
          <div class="row">
            <form class="col-5">
              <div class="form-group">
                <div class="input-group">
                  <div class="input-group-prepend">
                    <span class="input-group-text search-icon"><i class="fa fa-search"></i></span>
                  </div>
                  <input type="email" class="form-control search-input" id="exampleInputEmail1"
                         aria-describedby="emailHelp" placeholder="Search">
                </div>
              </div>
            </form>
          <div class="col-7 text-right">
            <div class="dropdown filters">
              <a class="dropdown-toggle"  id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                Filter 1
              </a>
              <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
                <a class="dropdown-item" href="#">item1</a>
              </div>
            </div>
            <div class="dropdown filters">
              <a class="dropdown-toggle" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
              Filter 2
              </a>
              <div class="dropdown-menu" aria-labelledby="dropdownMenuButton">
                <a class="dropdown-item" href="#">item1</a>
              </div>
            </div>
          </div>
        </div>
        </li>
        <li class="list-group-item">list item 1</li>
        <li class="list-group-item">list item 2</li>

        <li class="list-group-item bg-custom-light2 py-4">container footer</li>
      </ul>
    </div>
  </div>
</div>