actuel-inactuel/site/snippets/cover.php

<?php
$isOpen = isset($isOpen) ? $isOpen : false;
?>

<header 
  class="page-cover"
>
  <div class="title-wrapper">
    <?= $slots->title() ?>
  </div>
  <?php if ($slots->text()): ?>  
    <div class="text-wrapper">
      <?= $slots->text() ?>
    </div>
  <?php endif ?>
</header>
<div id="entry-btns">
  <button
    class="entry-btn entry-btn--left toggle-btn left"
    onclick="togglePanel('left')"
  >années</button>
  <button
    class="entry-btn entry-btn--right toggle-btn right"
    onclick="togglePanel('right')"
  >categories</button>
</div>