JSFiddle - React, Tailwind, and code Playground

HTML

<?php if ( has_post_thumbnail() && is_eye_catch_visible() ): // サムネイルを持っているときの処理 ?>
<div class="eye-catch">
    <?php
        //the_post_thumbnail( 'large');
        
        the_post_thumbnail();
        if( get_post( get_post_thumbnail_id() )->post_excerpt ) {
            echo '<span>' . get_post( get_post_thumbnail_id() )->post_excerpt . '</span>';
        }
    ?>
</div>
<?php endif; ?>