如何知道引导程序中点击哪个菜单项

Question

我想知道引导菜单中哪个元素被点击。

我有一个菜单有下拉菜单，所以我想知道哪个菜单项被点击，我想将它存储在浏览器本地存储如何做到这一点？

JS FIDDLE

我想这样来的菜单项，点击，但它不工作：

document.addEventListener('click', function(e) { 
 
    alert(e.target.id); 
 
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script> 
 

 
<!-- Latest compiled and minified CSS --> 
 
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous"> 
 

 
<!-- Optional theme --> 
 
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap-theme.min.css" integrity="sha384-fLW2N01lMqjakBkx3l/M9EahuwpSfeNvV63J5ezn3uZzapT0u7EYsXMjQV+0En5r" crossorigin="anonymous"> 
 

 
<!-- Latest compiled and minified JavaScript --> 
 
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script> 
 
<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="#">Brand</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="#">Link <span class="sr-only">(current)</span></a> 
 
     </li> 
 
     <li><a href="#">Link</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" role="search"> 
 
     <div class="form-group"> 
 
      <input type="text" class="form-control" placeholder="Search"> 
 
     </div> 
 
     <button type="submit" class="btn btn-default">Submit</button> 
 
     </form> 
 
     <ul class="nav navbar-nav navbar-right"> 
 
     <li><a href="#">Link</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> 
 
      </ul> 
 
     </li> 
 
     </ul> 
 
    </div> 
 
    <!-- /.navbar-collapse --> 
 
    </div> 
 
    <!-- /.container-fluid --> 
 
</nav>

而且如何存储和检索数据库thier价值？

Answer 1

为主播添加代表点击事件至.dropdown-menu： -

已更新fiddle

$('.dropdown-menu').on('click', 'a', function(e){ 
 
    
 
    // 'this' is the clicked anchor 
 
    
 
    var text = this.text; 
 
    var href = this.href; 
 
    
 
    alert(text); 
 
    
 
    // here add to local storage; 
 
    
 
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 

 
<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> 
 
</ul>

Answer 2

首先，您必须更具体地说明您想要添加侦听器的元素。你必须为这些元素添加一个特定的类。然后，你可以使用jQuery很容易地做到这一点：

$(".yourClassName"){ 
//$(this) will refer to the element 
} 

这样，你可以在本地存储中存储的点击元素的内容：

$(".yourClassName"){ 
    var value = $(this).text(); 
    var id = $(this).attr("id"); 
    localStorage.setItem(id , value); 
    } 

而且这样你找回自己的价值：

var value = localStorage.getItem(itemId);