Jquery-检查Div中是否存在类

Question

我一直试图检查div中是否存在类.但它总是产生一个长度为0.这是我的代码: -

<div id="accordion2" class="accordion" >
  <div class="accordion-group">
    <div class="accordion-heading"> <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion2" href="#collapseOne">
        <div class="align-nav arrow-active">OSTOMY PRODUCTS</div></a>
    </div>
    <div id="collapseOne" class="accordion-body in collapse">
        <div class="accordion-inner">
            <ul>
                <li><a href="#">Professional Resources</a></li>
                <li><a href="#">One-piece Pouching</a></li>
            </ul>
        </div>
    </div>
  </div>
  <div class="accordion-group">
    <div class="accordion-heading"> <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion2" href="#collapseTwo">
        <div class="align-nav arrow-inactive">LEARNING CENTER</div>
    </a> </div>
    <div id="collapseTwo" class="accordion-body collapse">
        <div class="accordion-inner">
            <ul>
                 <li><a href="#">Videos</a></li>
                 <li><a href="#">Before Your Surgery</a></li>
            </ul>
        </div>
    </div>
  </div>
  <div class="accordion-group">
    <div class="accordion-heading"> <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion2" href="#collapseThree">
      <div class="align-nav">PROFESSIONAL RESOURCES </div>
    </a> </div>
  </div>
  <div class="accordion-group">
    <div class="accordion-heading"> <a class="accordion-toggle" data-toggle="collapse" data-parent="#accordion2" href="#collapseThree">
           <div class="align-nav">PROFESSIONAL RESOURCES </div>
    </a> </div>
  </div>
</div>

对于前2个div $(this).find('accordion-body').长度应为1.但它仍然显示0.我的Jquery COde如下: -

$('.accordion-heading').click(function() {
            if($(this).find('accordion-body').exist()) {
                alert('hi');
                if($(this).find('.collapsed').length > 0) {
                    alert('hi');
                    //$(this).find('.accordion-toggle .align-nav').removeClass('arrow-active').addClass('arrow-inactive');  
                }
                else {
                    alert('hi');
                    //$(this).find('.accordion-toggle .align-nav').removeClass('arrow-inactive').addClass('arrow-active');
                }
            }
        });

我需要得到$(this).find('accordion-body').length = 1; 请提供解决方案.

Answer 1

你应该选择一个类选择器,find因为你正在搜索类..并且因为accordion-body是父母后代使用parent()

试试这个

$(this).parent().find('.accordion-body').length == 1; 

或者你可以使用 hasClass()