Question

我目前不知道如何获取该类的值，例如我在下面发布的代码。如果我单击值为0的li类，我希望它执行A如果我单击值为1的li类，我希望它执行B

I'm using bootstrap and jquery/javascript.
Sorry if my code seems not tidy, this is my first post , i'll try to tidy it up in the next posts. 


I've been doing inspect elements and it's showed me no error, but the variable X isn't getting it's value from li.

如果选择的值为0，这是我希望它执行A

$(".clDropdown").click(function() {
    debugger ;var x = document.getElementsByClassName("clDropdown").selectedIndex;
    if (x == 0) {
        alert("DO A");
        debugger ;
    } else if (x == 1) {
        alert("DO B");
        debugger ;
    }
});

 <div class="dropdown">
    <button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown">
        More <span class="caret"></span>
    </button>
    <ul class="dropdown-menu">//if 0 do A
        <li class="clDropdown" value="0"><a href="#">Edit</a></li>
        <li class="clDropdown" value="1"><a href="#">Delete</a></li>
    </ul>
</div>

I expect that if i click the li that value 0 it'll do A , and if i click the li that has value 1 it'll do B

Answer 1

如果您想获得index，可以使用$(this).index()
我更喜欢使用data属性并使用$(this).data('value')

$(".clDropdown").click(function() {
  debugger;
  var x = $(this).data('value');
  if (x == 0) {
    alert("DO A");
    debugger;
  } else if (x == 1) {
    alert("DO B");
    debugger;
  }
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="dropdown">
  <button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown">
    More <span class="caret"></span>
  </button>
  <ul class="dropdown-menu">//if 0 do A
    <li class="clDropdown" data-value="0"><a href="#">Edit</a></li>
    <li class="clDropdown" data-value="1"><a href="#">Delete</a></li>
  </ul>
</div>

如何从li值中获取元素并操纵其值？

1 个答案: