next-post-preview.php

<?php if($page->hasPrevVisible()): ?>
<a href="<?php echo $page->prevVisible()->url() ?>">previous page</a>
<?php endif ?>

<?php if($page->hasNextVisible()): ?>
<a href="<?php echo $page->nextVisible()->url() ?>">next page</a>
<?php endif ?>

<div class="next-post-container">

<section class="next-post" style="background: url(<?php echo $page->prevVisible()->url() ?>/<?php echo $page->prevVisible()->featimg() ?>) center center no-repeat; background-size: cover; opacity: 0.4;">

<?php if($page->hasPrevVisible()): ?>
	<h1><a href="<?php echo $page->prevVisible()->url() ?>"><?php echo $page->prevVisible()->title() ?></a></h1>
	<h2><a href="<?php echo $page->prevVisible()->url() ?>"><?php echo $page->prevVisible()->subtitle() ?></a></h2>
<?php endif ?>

</div>

</section>


<?php foreach($page->files()->findByExtension('js') as $js): ?>
	<?php echo js($js->url()) ?>
	<?php endforeach ?>