Question

所以我有固定的响应式这两个导航栏。这是我的代码：

function myFunction() {
  var x = document.getElementById("myTopnav");
  if (x.className === "topnav") {
    x.className += " responsive";
  } else {
    x.className = "topnav";
  }
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}
.outer {
  position: fixed;
  top: 0px;
  widtH: 100%;
}

.topnav {
  overflow: hidden;
  background-color: #333;
}

.topnav a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.topnav a:hover {
  background-color: #ddd;
  color: black;
}

.active {
  background-color: #4CAF50;
  color: white;
}

.topnav .icon {
  display: none;
}

@media screen and (max-width: 600px) {
  .topnav a:not(:first-child) {display: none;}
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 600px) {
  .topnav.responsive {position: relative;}
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
}
.secondnav {
background:red;
width:100%;
height:42px;
}

<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
</head>
<body>
<div class="outer">
  <div class="topnav" id="myTopnav">
        <a href="#home" class="active">Home</a>
    <a href="#news">News</a>
    <a href="#contact">Contact</a>
    <a href="#about">About</a>
    <a href="#help">Help</a>
    <a href="#terms">Terms</a>
    <a href="#privacy">Privacy</a>
    <a href="#cookies">Cookies</a>
    <a href="#activitylog">Activity Log</a>
    <a href="#events">Events</a>
    <a href="#settings">Settings</a>
    <a href="#notifications">Notifications</a>
    <a href="#friendrequest">Friend Requests</a>
    <a href="javascript:void(0);" class="icon" onclick="myFunction()">
      <i class="fa fa-bars"></i>
    </a>
  </div>
  <div class="secondnav">
</div>

</div>
</body>
</html>

问题是，当调整窗口大小并且导航栏变得响应并且我单击菜单按钮时，由于导航栏中有很多项目，因此我无法滚动浏览菜单。如何解决这个问题？请不要建议其他方法。请尝试使用此代码。
并预先感谢！

Answer 1

您可以添加以下CSS：

@media screen and (max-width: 600px) {
  .topnav.responsive {
    position: relative;
    max-height: 75vh; /* Set to the hegith you want to use */
    overflow-y: scroll; /* Enable scroll */
  }

如果不想显示滚动条，只需添加：

  .topnav.responsive::-webkit-scrollbar {
    width: 0px;  /* remove scrollbar space */
    background: transparent;  /* optional: just make scrollbar invisible */
  }

function myFunction() {
  var x = document.getElementById("myTopnav");
  if (x.className === "topnav") {
    x.className += " responsive";
  } else {
    x.className = "topnav";
  }
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
}
.outer {
  position: fixed;
  top: 0px;
  widtH: 100%;
}

.topnav {
  overflow: hidden;
  background-color: #333;
}

.topnav a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
  font-size: 17px;
}

.topnav a:hover {
  background-color: #ddd;
  color: black;
}

.active {
  background-color: #4CAF50;
  color: white;
}

.topnav .icon {
  display: none;
}

@media screen and (max-width: 600px) {
  .topnav a:not(:first-child) {display: none;}
  .topnav a.icon {
    float: right;
    display: block;
  }
}

@media screen and (max-width: 600px) {
  .topnav.responsive {
    position: relative;
    max-height: 75vh; /* Set to the hegith you want to use */
    overflow-y: scroll; /* Enable scroll */
  }
  .topnav.responsive .icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
    float: none;
    display: block;
    text-align: left;
  }
}
.secondnav {
background:red;
width:100%;
height:42px;
}

<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
</head>
<body>
<div class="outer">
  <div class="topnav" id="myTopnav">
        <a href="#home" class="active">Home</a>
    <a href="#news">News</a>
    <a href="#contact">Contact</a>
    <a href="#about">About</a>
    <a href="#help">Help</a>
    <a href="#terms">Terms</a>
    <a href="#privacy">Privacy</a>
    <a href="#cookies">Cookies</a>
    <a href="#activitylog">Activity Log</a>
    <a href="#events">Events</a>
    <a href="#settings">Settings</a>
    <a href="#notifications">Notifications</a>
    <a href="#friendrequest">Friend Requests</a>
    <a href="javascript:void(0);" class="icon" onclick="myFunction()">
      <i class="fa fa-bars"></i>
    </a>
  </div>
  <div class="secondnav">
</div>

</div>
</body>
</html>

如何滚动固定的双导航栏？

1 个答案: