javascript – 单击按钮的标题或按钮图标后,按钮的事件不起作用

我创建了一个带标签和“向下插入”图标的下拉按钮.当下拉菜单打开时,“向下插入”图标应该向上旋转,这是有效的.

但是,如果我点击按钮标题或“向下插入”图标,此事件不起作用.

$(document).ready(function() {
  $('.dropdown').click(function(e) {
    $($(e.target).find('.down-caret').toggleClass('open-caret'));
    e.stopPropagation();
    $(document).click(function() {
      $('.dropdown-menu').removeClass('open');
      $('.down-caret').removeClass('open-caret');
    });
  });
});

a {
  text-decoration: none;
}

.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown .drop {
  background-color: #3498db;
  color: #fff;
  padding: 1rem;
  border-radius: 6px;
  position: relative;
  display: inline-block;
}

.down-caret {
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 5px 5px 0 5px;
  border-color: #ffffff transparent transparent transparent;
  display: inline-block;
  margin-left: 6px;
  top: -3px;
  position: relative;
  transform: rotate(0deg);
  transition: all 0.25s ease-in;
}

.open-caret {
  transform: rotate(180deg);
  transition: all 0.25s ease-out;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<li class="dropdown">
  <a class="drop" href="#">
    <span>Dropdown</span>
    <i class="down-caret"></i>
  </a>
</li>

我需要span&我标记存在于我的代码中.

这是我的完整代码jsFiddle

解决方法

原因是,您正在使用当前单击的元素$(e.target)来查找具有类down-caret的元素.

如果单击图标或文本,则指定的类中没有元素.

你只需要将$(e.target)更改为$(‘.dropdown’)就可以了.

$(document).ready(function(){
  $('.dropdown').click(function(e){
    $('.dropdown').find('.down-caret').toggleClass('open-caret');
 
  });
  
 
});

a {
  text-decoration: none;
}
.dropdown {
  position: relative;
  display: inline-block;
}
.dropdown .drop {
  background-color: #3498db;
  color: #fff;
  padding: 1rem;
  border-radius: 6px;
  position: relative;
  display: inline-block;
}
.down-caret {
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 5px 5px 0 5px;
  border-color: #ffffff transparent transparent transparent;
  display: inline-block;
  margin-left: 6px;
  top: -3px;
  position: relative;
  transform: rotate(0deg);
  transition: all 0.25s ease-in;
}
.open-caret {
  transform: rotate(180deg);
  transition: all 0.25s ease-out;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

<li class="dropdown">
   <a class="drop" href="#">
      <span>Dropdown</span>
      <i class="down-caret"></i>
   </a>
</li>

这是fiddle