How to display a subcategory of a custom taxonomy category?

Question

Taxonomy

In general, I need to display the subcategories of the first level of the current category of the custom taxonomy, but not in the form of a sheet, but in some controlled layout, where I can place it anywhere, and if there are no subcategories, then display the posts already tied to it. I searched through a lot of content, but could not find what I was looking for. Help me please.
How I imagine this code:
if (if there is a subcategory) {
output subcategories;
}
else {
if ( have_posts() ) : while (have_posts()) : the_post(); etc.
}

Answer 1

Hello!
I had a similar problem before...
Here is a simple skeleton of what you want:

<?php 
$currentTerm = get_queried_object();
$children = get_term_children($currentTerm -> term_id, 'MY_TAXONOMY');
if($children): ?>
  <?php 
        $args = array(
          'taxonomy' => 'MY_TAXONOMY',
          'hide_empty' => false,
          'depth' => 1,
          'child_of' => get_queried_object()->term_id
        );
        $terms = get_terms( $args );
        $count = 1;
  ?>

  <?php foreach ($terms as $term): ?>

    <a href="<?php echo $term->slug ?>"><?php echo $term->name ?></a>

  <?php endforeach; ?>

  <?php else : ?>

    <?php 
    	$postCount = 1;
      $args = array(
        'posts_per_page' => -1,
        'MY_TAXONOMY' => $currentTerm->name
      );

      $query = new WP_Query( $args );
      if ($query->have_posts()) : 
        while ($query->have_posts()) : $query->the_post(); ?>
            <a href="<?php the_permalink() ?>">
                  <div class="title"><?php the_title(); ?></div>
            </a>

      <?php endwhile; ?>
      <?php endif; ?>

<?php endif;?>

MY_TAXONOMY - my custom taxonomy. You can change to your own version or use the default category taxonomy.
In the first part, we get get_queried_object();and see if there are child categories, if there are, then display them, and if not (the else branch), then display the posts