How to display activity class in MODX Revo?

Question

MODX

Hi friends. There is such a problem. I bring tabs to the main page

<section class="content content_dark">
  <div class="services">
    <div class="service__list-container">
      <h3 class="service__title">Услуги</h3>
      <ul class="service__list">
          
      </ul>
    </div>
    <div class="service__content">
        
      
      
    </div>
  </div>
</section>

link-usligiTpl content

<li class="service__item">
  <a href="#" class="service__link service__link_active" data-tab-id=""></a>
</li>

Content of block-usligiTpl

<div class="service__item-content service__item-content_active" id="">
  
</div>

And the essence of the question is that there is an activity class service__link_active and the second service__item-content_active
How to make it so that when the page is opened, it would be assigned only to the first taboo? But not everyone.

Answer 1