Yii2 - notatki

HTML

 <h5 class="w-100" data-toggle="collapse" data-target="#collapse1" aria-expanded="true" aria-controls="collapse1">
     <span class="toggle-icon fas fa-chevron-down fs-8"></span> Tytuł 
 </h5>

JS

$('h5[data-toggle="collapse"]').click(function () {
        $(this).find('span.toggle-icon').toggleClass('fa-chevron-up fa-chevron-down');
     })