index.php

<?php
/**
 * The main template file
 *
 * This is the most generic template file in a WordPress theme
 * and one of the two required files for a theme (the other being style.css).
 * It is used to display a page when nothing more specific matches a query.
 * E.g., it puts together the home page when no home.php file exists.
 *
 * @link https://codex.wordpress.org/Template_Hierarchy
 *
 * @package monostack
 */

get_header(); ?>

	<main id="primary" class="site-main">

	<?php
	if ( have_posts() ) :

		if ( is_home() && ! is_front_page() ) : ?>
			<header>
				<h1 class="page-title screen-reader-text"><?php single_post_title(); ?></h1>
			</header>

		<?php
		endif;

		/* Start the Loop */
		while ( have_posts() ) : the_post();

			/*
				* Include the Post-Format-specific template for the content.
				* If you want to override this in a child theme, then include a file
				* called content-___.php (where ___ is the Post Format name) and that will be used instead.
				*/
			get_template_part( 'template-parts/content', get_post_format() );

		endwhile;

		the_posts_navigation();

	else :

		get_template_part( 'template-parts/content', 'none' );

	endif; ?>

	</main><!-- #primary -->

<?php
get_footer();