如果我点击任何子项目，如何在top li上设置活动类

Question

我有来自数据库的动态php菜单，类似于这个html结构。

如果我点击LED电视或电视类别我想将活动课程设置为所有类别，如下所示：dropdown-item dropdown-toggle active

我怎么能在php或jquery中做到这一点？

<li class="dropdown"><a id="20" class="dropdown-item dropdown-toggle " href="index.php?page=AllCategories&categoriesgroup=allcategoriesgroup"> ALL CATEGORIES<i class="fas fa-caret-down"></i></a>
    <ul class="dropdown-menu">
        <li class="dropdown-submenu dropdown-reverse"><a id="402" class="dropdown-item" href="index.php?page=productCategories&categories=tvcategories">TV CATEGORIES<i class="fas fa-caret-down"></i></a>
            <ul class="dropdown-menu">
                <li class=""><a id="403" class="dropdown-item" href="index.php?page=productDetail&product=ledtv">LED TV</a></li>
            </ul>
        </li>
    </ul>
</li>

Answer 1

你可以使用.parents("li").last()来获得最高分。

$(".dropdown-item").click(function() {
  $(this).parents("li").last().toggleClass("active");
});

$(".dropdown-item").click(function() {
  $(this).parents("li").last().toggleClass("active");
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul>
  <li class="dropdown"><a id="20" class="dropdown-item dropdown-toggle " href="#"> ALL CATEGORIES<i class="fas fa-caret-down"></i></a>
    <ul class="dropdown-menu">
      <li class="dropdown-submenu dropdown-reverse"><a id="402" class="dropdown-item" href="#">TV CATEGORIES<i class="fas fa-caret-down"></i></a>
        <ul class="dropdown-menu">
          <li class=""><a id="403" class="dropdown-item" href="#">LED TV</a></li>
        </ul>
      </li>
    </ul>
  </li>
</ul>

Answer 2

$(document).on('click', '.test', function () {
		var newids=$(this).data('id');
		$(this).parents().children('#'+newids).addClass("active");
	});

.active{
color:red !important;	
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul>
  <li class="dropdown"><a id="20" class="dropdown-item dropdown-toggle " href="#"> ALL CATEGORIES<i class="fas fa-caret-down"></i></a>
<ul class="dropdown-menu">
  <li class="dropdown-submenu dropdown-reverse"><a id="402" class="dropdown-item" href="#">TV CATEGORIES<i class="fas fa-caret-down"></i></a>
    <ul class="dropdown-menu">
      <li class="test" data-id="20"><a id="403"  class="dropdown-item" href="#">LED TV</a></li>
    </ul>
  </li>
</ul>
  </li>
</ul>

$(document).on('click', '.test', function () {
		var newids=$(this).data('id');
		$(this).parents().children('#'+newids).addClass("active");
	});

.active{
color:red !important;	
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul>
  <li class="dropdown"><a id="20" class="dropdown-item dropdown-toggle " href="#"> ALL CATEGORIES<i class="fas fa-caret-down"></i></a>
    <ul class="dropdown-menu">
      <li class="dropdown-submenu dropdown-reverse"><a id="402" class="dropdown-item" href="#">TV CATEGORIES<i class="fas fa-caret-down"></i></a>
        <ul class="dropdown-menu">
          <li class="test" data-id="20"><a id="403"  class="dropdown-item" href="#">LED TV</a></li>
        </ul>
      </li>
    </ul>
  </li>
</ul>