Question

隐藏部分内容时遇到问题。我对编码很新，我开始编码一周前。到目前为止，我已经学习了html，最有趣的css，以及如何使用bootstrap 4.我的问题是我想要隐藏一些内容。我在网上搜索了几个小时，我发现唯一有用的是d-none和d-sm-block以及所有其他隐藏和显示标签。我在我的代码中尝试了几个没有运气的地方，所以希望任何人都可以提供帮助。我希望搜索栏，登录并在小屏幕上注册按钮消失，然后显示一个小的下拉菜单（仅在小屏幕上）。在下拉菜单中，我想让登录按钮登录。我知道我没有使用boopstrap作为顶部的导航栏，但那是因为我还没有学习它，我不想改变它，因为我喜欢按钮上的大小。希望任何人都可以提供帮助。

我的html代码的顶部。（我的真实代码中的hotpink按钮更大，因为我有其他文本）

<head>
    <title>hello world</title>
    <link rel="stylesheet" href="../test_sublime/css/bootstrap.css">
    <link href="test1.css" rel="stylesheet" type="text/css">
</head>
<body>
    <header>
        <h2><em><u>Header</u></em>.no</h2>
        <nav class="headnav">
            <ul>
                <li class="hotpink"><a class="b_link" href="#">Test</a></li>
                <li class="hotpink"><a class="b_link" href="#">Test</a></li>
                <li class="hotpink"><a class="b_link" href="#">Test</a></li>
                <li class="hotpink"><a class="b_link" href="#">Test</a></li>
                <li class="hotpink"><a class="b_link" href="#">Test</a></li>
            </ul>
        </nav>      
        <div class="btn-group">
            <a href="../test_sublime/logg in.html" class="btn btn-primary" role="button">Logg In</a>
            <a href="../test_sublime/registrer.html" class="btn btn-primary" role="button">Register</a>
        <!--This is the search bar I want to hide when the screen is small-->
        </div>
            <form class="form-inline my-lg sok">
                <input class="form-control mr-sm-2 msok" type="search" placeholder="Søk" aria-label="Search">
                <button class="btn btn-outline-success my-2 my-sm-0 msok" type="submit">Søk</button>
            </form>
        <!--I want this dropdown menu to show up when the screen is small-->
        <div class="dropdown-menu d-block d-sm-none" aria-labelledby="navbarDropdown">
          <a class="dropdown-item" href="../test_sublime/logg in.html">Logg Inn</a>
          <a class="dropdown-item" href="../test_sublime/registrer.html">Register Deg</a>
          <div class="dropdown-divider"></div>
        </div>
    </header>

        ...

    <footer>
        ...
    <script src="https://code.jquery.com/jquery-3.3.1.js"
            integrity="sha256-2Kok7MbOyxpgUVvAk/HJ2jigOSYS2auK4Pfzbm7uH60="
            crossorigin="anonymous"></script>
    <script>window.jQuery || document.write('<script scr="../test_sublime/jQuery/jquery.js"><\/script>');</script>
    <script type="text/javascript" src="../test_sublime/js/test.js"></script>
    <script src="test_sublime/js/bootstrap.min.js"></script>
    </footer>
</body>

我的部分内容

body {
background: pink;
margin-left: 12px;
margin-right: 12px;
margin-top: 10px;
}

h2 {
display:inline;
background: mediumvioletred;
padding: 20px 40px 7px 40px;
margin: 0px 5px 40px -15px;
border-radius: 4px;
}

ul {
display: inline;
margin: 0px 0px 0px -38px
}

.sok {
display: inline-block;
float: right;
margin-right: 35px;
margin-top: 10px;
}

.msok {
margin-top: 0px;
}

.btn-group { 
padding: 0px 10px 0px -10px
display: inline;
float: right;
margin-top: 10px;
}

nav.headnav {
display: inline-block;
}

用引导程序修复它是否有任何方法，或者我是否必须使用JavaSript或其他东西？（抱歉有颜色）

Answer 1

在您的css中使用媒体查询

char c = u8'é'; // illegal! const char *s8 = u8"é", // 0xC3 0xA9

您可以根据屏幕尺寸隐藏元素。 Bootstrap Responsive Break Points

Answer 2

这将使用navbar类解决您的问题。

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<link rel="stylesheet" href="bootstrap.css">
<script src="jquery.js"></script>
<script src="bootstrap.js"></script>
</head>
<body>
<nav class="navbar navbar-default">
    <div class="container-fluid">
      <!-- Brand and toggle get grouped for better mobile display -->
      <div class="navbar-header">
        <button type="button" class="navbar-toggle collapsed" data-        toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-    expanded="false">
          <span class="sr-only">Toggle navigation</span>
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>
        </button>
        <a class="navbar-brand" href="#">yourbrand</a>
      </div>

      <!-- Collect the nav links, forms, and other content for toggling -->
      <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
        <ul class="nav navbar-nav">
          <li class="active"><a href="#">Home <span class="sr-only">(current)</span></a></li>
          <li><a href="#">About</a></li>
          <li class="dropdown">
            <a href="#" class="dropdown-toggle" data-toggle="dropdown"     role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
            <ul class="dropdown-menu">
              <li><a href="#">Action</a></li>
              <li><a href="#">Another action</a></li>
              <li><a href="#">Something else here</a></li>
              <li role="separator" class="divider"></li>
              <li><a href="#">Separated link</a></li>
              <li role="separator" class="divider"></li>
              <li><a href="#">One more separated link</a></li>
            </ul>
          </li>
        </ul>
        <form class="navbar-form navbar-left">
                <div class="input-group">
                        <input type="text" class="form-control" placeholder="Search">
                        <span class="btn input-group-addon">Search</span>
                </div>
        </form>
        <ul class="nav navbar-nav navbar-right">
            <div class="btn-group">
                <a href="../test_sublime/logg in.html" class="btn btn-primary" role="button">Logg In</a>
                <a href="../test_sublime/registrer.html" class="btn btn-primary" role="button">Register</a>
            </div>
        </ul>
      </div><!-- /.navbar-collapse -->
    </div><!-- /.container-fluid -->
  </nav>
</body>
</html>

隐藏和显示带引导程序的元素的问题

2 个答案: