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html - 响应式导航栏问题

问题描述

我需要在桌面上创建一个下拉菜单，这没关系，但在移动视图中我有这个问题：如何在不需要 javascript 代码的情况下通过图标打开和关闭导航栏。只是 html 和 Css bure。我只需要内部@media。（MOBIL VIEW UNDER 600PX）所以当我点击工具栏时，我可以打开和关闭导航栏

这是代码：

body {
  margin: 0px;
  padding: 0px;
  background-color: #edf1fd;
  box-sizing: border-box;
}
ul {
  list-style: none;
}
a {
  text-decoration: none;
}

.dropdown-content {
  display: none;
  position: absolute;
  top: 50px;
  min-width: 120px;
  min-height: auto;
  z-index: 1;
  background-color: #fff;
}

.dropdown-content a {
  float: center;
  color: black;
  padding: 14px 18px;
  text-decoration: none;
  display: block;
  text-align: center;
  text-transform: capitalize;
}

.dropdown-content a:hover {
  background-color: #292929;
  color: #fff;
}

.dropdown:hover .dropdown-content {
  display: block;
  color: #292929;
  background-color: #fff;
}

img {
  width: 55px;
  height: 56px;
}

.toggle {
  display: none;
}
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 2px;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  box-sizing: border-box;
  background-color: #f4f7ff;
  padding: 10px 50px;
  box-shadow: 2px 2px 12px rgb(0 0 0 / 15%);
}

.menu {
  list-style: none;
  display: flex;
}
.menu li a {
  padding: 10px 15px;
  color: #6c707c;
  font-size: 12px;
}
.active a,
.menu li a:hover {
  background-color: #292929;
  color: #fff !important;
  font-weight: bold;
  transition: all ease 0.8s;
}
#menuToggle {
  display: none;
}

@media (max-width: 600px) {
  .toggle {
    display: block;
  }
  .toggle::before {
    content: "\f0c9";
    font-family: fontAwesome;
    line-height: 0px;
    margin-left: -30px;
  }
  .toggle.active::before {
    content: "\f00d" !important;
  }

  nav {
    padding: 10px 30px;
  }

  nav ul {
    position: absolute;
    width: 100%;
    height: auto;
    box-sizing: border-box;
    background-color: #0f0f0f;
    top: 80px;
    left: 0;
    transition: 0.5s;
    overflow: hidden;
    display: none !important;
    border: 3px solid #1f1f1f;
  }

  nav ul li a {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: #ffffff !important;
    width: 100%;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0px !important;
    padding: 0px !important;
  }
  nav ul {
    padding: 0px;
    margin: 0px;
  }

  .active-menu {
    display: block !important;
  }

  nav ul li a:hover {
    background-color: rgba(27, 29, 32, 0.15);
  }
  .dropdown-content a {
    display: none;
  }
}
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>A new Navbar</title>

    <meta name="viewport" content="width=device-width, initial-scale=1.0" />

    <link href="style.css" rel="stylesheet" />
    <script
      src="https://kit.fontawesome.com/c8e4d183c2.js"
      crossorigin="anonymous"
    ></script>
    

    <body>
      <header>
        <nav>
          <img src="uber-removebg-preview.png" alt="logo" />

          <div class="toggle"></div>
          
          <ul class="menu">
            <li class="active"><a href="#">Home</a></li>
            <li><a href="#">About</a></li>
            <div class="dropdown">
              <li><a href="#">Services</a></li>
              <div class="dropdown-content">
                <a href="#">Services 1</a>
                <a href="#">Services 2</a>
                <a href="#">Services 3</a>
              </div>
            </div>
            <li><a href="#">Portfolio</a></li>
            <li><a href="#">Contact</a></li>
          </ul>
        </nav>
      </header>
    
</div>
      
    </body>
  </head>
</html>

标签： htmlcss

解决方案

通常人们使用 javascript 来做这些事情，但你应该只能让它工作 CSS 和 HTML。

您可能必须使用visibility或hight使用要显示或隐藏的导航栏。您可以在此之上使用一些过渡以使其看起来平滑。

例如，您可以创建两个类，如下所示：







.navbar.opened {
  visibility: visible;
  height: 200px; //Whatever you want to set it as
 }
 
 .navbar.closed {
  visibility: hidden;
  height: 0px;
 }

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