Как проверить если ли контент в блоке

function isEmpty(el) { 
  return !$.trim(el.html()) 
} 
if (isEmpty($('.width-content-pay'))) { 
  $('.width-content-pay').addClass('removeWidth'); 
  $('.width-content-bill-status').addClass('empty'); 
} else { 
  removeClas(); 
} 
 
function removeClas() { 
  $('.width-content-pay').has("a"); 
  $('.width-content-bill-status').removeClass('empty'); 
  $('.width-content-pay').removeClass('removeWidth'); 
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
<div> 
  <ul class="header-nav"> 
    <li class="width-content-data">{{ _("Дата создания") }}</li> 
    <li class="width-content-id">{{ _("ID счета") }}</li> 
    <li class="width-content-number">{{ _("Сумма счета") }}</li> 
    <li class="width-content-shop">{{ _("Магазин") }}</li> 
    <li class="width-content-amount">{{ _("Сумма к оплате") }}</li> 
    <li class="width-content-bill-status">{{ _("Статус") }}</li> 
    <li class="width-content-pay"></li> 
  </ul> 
</div> 
{% for bill in bills %} 
<div class="accordion" id="accordion_{{ bill.id }}" role="tablist" aria-multiselectable="true"> 
  <div class="card"> 
    <!-- Card header --> 
    <div class="card-header" role="tab" id="heading_{{ bill.id }}"> 
      <ul class="reports-detail"> 
        <a class="collapsed" data-toggle="collapse" data-parent="#accordion_{{ bill.id }}" href="#collapse_{{ bill.id }}" aria-expanded="true" aria-controls="collapse_{{ bill.id }}"> 
          <li class="width-content-data" data-atribute="{{ _(" Дата создания ") }}"><i class="collapsed fa fa-angle-down more-block"></i>{{ bill.created_text }}</li> 
        </a> 
        <li class="width-content-id" data-atribute="{{ _(" ID счета ") }}">{{ bill.id }}</li> 
        <li class="width-content-number" data-atribute="{{ _(" Сумма счета ") }}">{{ bill.shop_amount_text }}</li> 
        <li class="width-content-shop" data-atribute="{{ _(" Магазин ") }}"><a href="{{ bill.shop_url }}" target="_blank" rel="noopener noreferrer">{{ bill.shop_name }}</a></li> 
        <li class="width-content-amount" data-atribute="{{ _(" Сумма к оплате ") }}">{{ bill.payer_price_text }}</li> 
        <li class="width-content-bill-status" data-atribute="{{ _(" Статус ") }}"><i class="{{ bill.status_class }}" aria-hidden="true" title="{{ bill.status_text }}"></i></li> 
        <li class="width-content-pay" data-atribute="{{ _(" Оплатить ") }}"> 
          {% if bill.actions %} 
          <a class="pink-text accent-2 lead bill-action" title="Оплатить" href="{{ url_for('bills.bill', bill_id=bill.encode_id, lang_code=g.current_lang) }}"><i class="fa fa-check-square-o" aria-hidden="true"></i></a> {% endif %} 
        </li> 
      </ul> 
    </div>