javascript - 单独的导航下降必须有单独的内容，显示相同的内容

我在我的网站上的导航栏中有两个导航栏，我希望每个导航栏都显示自己的 div，我仍然是 JS 的初学者，我能得到一些帮助吗？谢谢。

它在下拉导航中显示相同的内容。这是要检查的代码片段。

var x = document.getElementById("myDropnav");
function w3_open() {
    if (x.className.indexOf("w3-show") == -1) {
        x.className += " w3-show";
    } else {
        x.className = x.className.replace(" w3-show", "");
    }
}
function w3_close() {
    x.className = x.className.replace(" w3-show", "");
}

  

<!DOCTYPE html>
<html>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://www.w3schools.com/lib/w3.css">
<link rel="stylesheet" href="http://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.6.3/css/font-awesome.min.css">
<body>  
<ul class="w3-navbar w3-black">
  <li><a href="#">Home</a></li>
  <li><a href="#">Link 1</a></li>
  <li><a href="#">Link 2</a></li>
  <li><a href="javascript:void(0)" onclick="w3_open()">Dropnav <i class="fa fa-caret-down"></i></a></li>
<li><a href="javascript:void(0)" onclick="w3_open()">Dropnav1 <i class="fa fa-caret-down"></i></a></li>
</ul>

<nav class="w3-dropnav w3-card-2" style="display:none" id="myDropnav">
  <div class="w3-container">
  <span onclick="w3_close('dropnav')" class="w3-closebtn w3-xlarge" title="Close Menu">&times;</span>
  </div>
  <div class="w3-row-padding w3-padding-bottom">
    <div class="w3-third">
    <h3>HTML/CSS</h3>
    <a href="#">Learn </a>
    <a href="#">Learn </a>
    <a href="#">Learn </a>
    </div>
    <div class="w3-third">
    <h3>JavaScript</h3>
    <a href="#">Learn JavaScript</a>
    <a href="#">Learn jQuery</a>
    <a href="#">Learn AppML</a>
    </div>
    <div class="w3-third">
    <h3>Graphics</h3>
    <a href="#">Learn Canvas</a>
    <a href="#">Learn SVG</a>
    </div>
  </div>
  <br>
</nav>
<nav class="w3-dropnav w3-card-2" style="display:none" id="myDropnav">
  <div class="w3-container">
  <span onclick="w3_close('dropnav')" class="w3-closebtn w3-xlarge" title="Close Menu">&times;</span>
  </div>
  <div class="w3-row-padding w3-padding-bottom">
    <div class="w3-third">
    <h3>HTML/CSS</h3>
    <a href="#">Learn HTML</a>
    <a href="#">Learn CSS</a>
    <a href="#">Learn W3.CSS</a>
    </div>
    <div class="w3-third">
    <h3>JavaScript</h3>
    <a href="#">Learn JavaScript</a>
    <a href="#">Learn jQuery</a>
    <a href="#">Learn AppML</a>
    </div>
    <div class="w3-third">
    <h3>Graphics</h3>
    <a href="#">Learn Canvas</a>
    <a href="#">Learn SVG</a>
    </div>
  </div>
  <br>
</nav>

<div class="w3-container">
  <p>Click on the "Dropnav" button to toggle the dropnav menu.</p>
</div>

最佳答案

对于您的示例，您可以按如下方式更改代码:

在点击事件中加入菜单的标识。

...
<li><a href="javascript:void(0)" onclick="w3_close('myDropnav2');w3_open('myDropnav1');">Dropnav 1<i class="fa fa-caret-down"></i></a></li>
<li><a href="javascript:void(0)" onclick="w3_close('myDropnav1');w3_open('myDropnav2');">Dropnav 2<i class="fa fa-caret-down"></i></a></li>
...

将菜单的标识符更改为唯一。

...
<nav class="w3-dropnav w3-card-2" style="display:none" id="myDropnav1">
   <div class="w3-container">
      <span onclick="w3_close('myDropnav1')" class="w3-closebtn w3-xlarge" title="Close Menu">&times;</span>
...
<nav class="w3-dropnav w3-card-2" style="display:none" id="myDropnav2">
   <div class="w3-container">
      <span onclick="w3_close('myDropnav2')" class="w3-closebtn w3-xlarge" title="Close Menu">&times;</span>
...

考虑当前菜单的标识符。

function w3_open(id) {
   var x = document.getElementById(id);
   if (x.className.indexOf("w3-show") == -1) {
      x.className += " w3-show";
   } else {
      x.className = x.className.replace(" w3-show", "");
   }
}
function w3_close(id) {
   var x = document.getElementById(id);
   x.className = x.className.replace(" w3-show", "");
}

关于javascript - 单独的导航下降必须有单独的内容，显示相同的内容，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39271447/

javascript - 单独的导航下降必须有单独的内容，显示相同的内容

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