Question

我在下拉菜单中有一张图片，希望成为下拉菜单的完整背景。我将图像设置为背景，但是如您所见，仍然有白色。如何仅使下拉菜单中的图像和其中包含滚轮？

在我看来，如何将滚轮css更改为图像？

（我将背景设为绿色以展示我不想显示的内容）

下拉CSS

        .dropdown-menu {
            width: 100%;
            background-image: url('Res/IM/page.png');
            background-size: 100% 100%;
            background-color: #1e7e34;
        }

相关下拉代码

<div id="inv1" class="dropdown-menu" style="min-height: 35vh; resize: vertical;background-image: url('Res/IM/page.png'); background-size: 100% 100%;" >
                        <div class="scrollable">
                            <a href="#" data-toggle="collapse" data-target="#inv1" class="dropdown-header text-right">X</a>
                            <CODE IS HERE AND IRRELEVANT>
                        </div>
</div>

Answer 1

你是说这个吗？

.dropdown-menu {
  background: url(https://t4.ftcdn.net/jpg/01/08/13/09/240_F_108130971_d2e6YQdGAfERW4p75YuJPQQsGZZXk41D.jpg);
  background-size: 100% 100%;
  background-color: transparent ;
}

a.dropdown-item {
  color: red;
  font-weight:bold
}

a.dropdown-item:hover {
  background-color: transparent ;
  color:white;
}

<!DOCTYPE html>
<html>

<head>
  <title>Bootstrap Example</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script>
</head>

<body>

  <div class="dropdown">
    <button type="button" class="btn btn-primary dropdown-toggle" data-toggle="dropdown">
    Dropdown button
  </button>
    <div class="dropdown-menu">
      <a class="dropdown-item" href="#">Link 1</a>
      <a class="dropdown-item" href="#">Link 2</a>
      <a class="dropdown-item" href="#">Link 3</a>

    </div>
  </div>
</body>

</html>

Answer 2

.dropdown-menu{
background-image: url('https://images.pexels.com/photos/949587/pexels-photo-949587.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500');
background-size: 100% 100%;
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"></script>

 <div class="dropdown">
    <button type="button" class="btn dropdown-toggle" data-toggle="dropdown">
      Dropdown button
    </button>
    <div class="dropdown-menu">
      <a class="dropdown-item" href="#">Link 1</a>
      <a class="dropdown-item" href="#">Link 2</a>
      <a class="dropdown-item" href="#">Link 3</a>
    </div>
  </div>

检查此代码。我认为这可以解决您的问题。：）

将Bootstrap下拉背景更改为仅图像

2 个答案: